diff --git a/bin/arc b/bin/arc
index e125698b..5f6aaf70 100755
--- a/bin/arc
+++ b/bin/arc
@@ -1,21 +1,10 @@
-#!/usr/bin/env bash
+#!/usr/bin/env php
+<?php
 
-# NOTE: This file is a wrapper script instead of a symlink so it will work in
-# the Git Bash environment in Windows.
+if (function_exists('pcntl_async_signals')) {
+  pcntl_async_signals(true);
+} else {
+  declare(ticks = 1);
+}
 
-# Do bash magic to resolve the real location of this script through aliases,
-# symlinks, etc.
-SOURCE="${BASH_SOURCE[0]}";
-while [ -h "$SOURCE" ]; do
-  LINK="$(readlink "$SOURCE")";
-  if [ "${LINK:0:1}" == "/" ]; then
-    # absolute symlink
-    SOURCE="$LINK"
-  else
-    # relative symlink
-    SOURCE="$(cd -P "$(dirname "$SOURCE")" && pwd)/$LINK"
-  fi
-done;
-DIR="$(cd -P "$(dirname "$SOURCE")" && pwd)"
-
-exec "$DIR/../scripts/arcanist.php" "$@"
+return require_once dirname(__DIR__).'/support/init/init-arcanist.php';
diff --git a/bin/arc.bat b/bin/arc.bat
index 5ce474bf..21735435 100644
--- a/bin/arc.bat
+++ b/bin/arc.bat
@@ -1,2 +1,2 @@
 @echo off
-php -f "%~dp0..\scripts\arcanist.php" -- %*
+php -f "%~dp0..\bin\arc" -- %*
diff --git a/bin/phage b/bin/phage
deleted file mode 120000
index 0817a287..00000000
--- a/bin/phage
+++ /dev/null
@@ -1 +0,0 @@
-../scripts/phage.php
\ No newline at end of file
diff --git a/bin/phage b/bin/phage
new file mode 100755
index 00000000..5f6aaf70
--- /dev/null
+++ b/bin/phage
@@ -0,0 +1,10 @@
+#!/usr/bin/env php
+<?php
+
+if (function_exists('pcntl_async_signals')) {
+  pcntl_async_signals(true);
+} else {
+  declare(ticks = 1);
+}
+
+return require_once dirname(__DIR__).'/support/init/init-arcanist.php';
diff --git a/src/__phutil_library_map__.php b/src/__phutil_library_map__.php
index fe1e4178..c8763252 100644
--- a/src/__phutil_library_map__.php
+++ b/src/__phutil_library_map__.php
@@ -1,1698 +1,1779 @@
 <?php
 
 /**
  * This file is automatically generated. Use 'arc liberate' to rebuild it.
  *
  * @generated
  * @phutil-library-version 2
  */
 phutil_register_library_map(array(
   '__library_version__' => 2,
   'class' => array(
     'AASTNode' => 'parser/aast/api/AASTNode.php',
     'AASTNodeList' => 'parser/aast/api/AASTNodeList.php',
     'AASTToken' => 'parser/aast/api/AASTToken.php',
     'AASTTree' => 'parser/aast/api/AASTTree.php',
     'AbstractDirectedGraph' => 'utils/AbstractDirectedGraph.php',
     'AbstractDirectedGraphTestCase' => 'utils/__tests__/AbstractDirectedGraphTestCase.php',
     'ArcanistAbstractMethodBodyXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistAbstractMethodBodyXHPASTLinterRule.php',
     'ArcanistAbstractMethodBodyXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistAbstractMethodBodyXHPASTLinterRuleTestCase.php',
     'ArcanistAbstractPrivateMethodXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistAbstractPrivateMethodXHPASTLinterRule.php',
     'ArcanistAbstractPrivateMethodXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistAbstractPrivateMethodXHPASTLinterRuleTestCase.php',
+    'ArcanistAlias' => 'toolset/ArcanistAlias.php',
+    'ArcanistAliasEffect' => 'toolset/ArcanistAliasEffect.php',
+    'ArcanistAliasEngine' => 'toolset/ArcanistAliasEngine.php',
     'ArcanistAliasFunctionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistAliasFunctionXHPASTLinterRule.php',
     'ArcanistAliasFunctionXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistAliasFunctionXHPASTLinterRuleTestCase.php',
     'ArcanistAliasWorkflow' => 'workflow/ArcanistAliasWorkflow.php',
+    'ArcanistAliasesConfigOption' => 'config/option/ArcanistAliasesConfigOption.php',
     'ArcanistAmendWorkflow' => 'workflow/ArcanistAmendWorkflow.php',
     'ArcanistAnoidWorkflow' => 'workflow/ArcanistAnoidWorkflow.php',
+    'ArcanistArcConfigurationEngineExtension' => 'config/arc/ArcanistArcConfigurationEngineExtension.php',
+    'ArcanistArcToolset' => 'toolset/ArcanistArcToolset.php',
     'ArcanistArrayCombineXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistArrayCombineXHPASTLinterRule.php',
     'ArcanistArrayCombineXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistArrayCombineXHPASTLinterRuleTestCase.php',
     'ArcanistArrayIndexSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistArrayIndexSpacingXHPASTLinterRule.php',
     'ArcanistArrayIndexSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistArrayIndexSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistArraySeparatorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistArraySeparatorXHPASTLinterRule.php',
     'ArcanistArraySeparatorXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistArraySeparatorXHPASTLinterRuleTestCase.php',
     'ArcanistArrayValueXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistArrayValueXHPASTLinterRule.php',
     'ArcanistArrayValueXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistArrayValueXHPASTLinterRuleTestCase.php',
     'ArcanistBackoutWorkflow' => 'workflow/ArcanistBackoutWorkflow.php',
     'ArcanistBaseCommitParser' => 'parser/ArcanistBaseCommitParser.php',
     'ArcanistBaseCommitParserTestCase' => 'parser/__tests__/ArcanistBaseCommitParserTestCase.php',
     'ArcanistBaseXHPASTLinter' => 'lint/linter/ArcanistBaseXHPASTLinter.php',
     'ArcanistBinaryExpressionSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistBinaryExpressionSpacingXHPASTLinterRule.php',
     'ArcanistBinaryExpressionSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistBinaryExpressionSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistBinaryNumericScalarCasingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistBinaryNumericScalarCasingXHPASTLinterRule.php',
     'ArcanistBinaryNumericScalarCasingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistBinaryNumericScalarCasingXHPASTLinterRuleTestCase.php',
     'ArcanistBlacklistedFunctionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistBlacklistedFunctionXHPASTLinterRule.php',
     'ArcanistBlacklistedFunctionXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistBlacklistedFunctionXHPASTLinterRuleTestCase.php',
     'ArcanistBlindlyTrustHTTPEngineExtension' => 'configuration/ArcanistBlindlyTrustHTTPEngineExtension.php',
     'ArcanistBookmarkWorkflow' => 'workflow/ArcanistBookmarkWorkflow.php',
     'ArcanistBraceFormattingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistBraceFormattingXHPASTLinterRule.php',
     'ArcanistBraceFormattingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistBraceFormattingXHPASTLinterRuleTestCase.php',
     'ArcanistBranchRef' => 'ref/ArcanistBranchRef.php',
     'ArcanistBranchWorkflow' => 'workflow/ArcanistBranchWorkflow.php',
     'ArcanistBrowseCommitHardpointLoader' => 'browse/loader/ArcanistBrowseCommitHardpointLoader.php',
     'ArcanistBrowseCommitURIHardpointLoader' => 'browse/loader/ArcanistBrowseCommitURIHardpointLoader.php',
     'ArcanistBrowseObjectNameURIHardpointLoader' => 'browse/loader/ArcanistBrowseObjectNameURIHardpointLoader.php',
     'ArcanistBrowsePathURIHardpointLoader' => 'browse/loader/ArcanistBrowsePathURIHardpointLoader.php',
     'ArcanistBrowseRef' => 'browse/ref/ArcanistBrowseRef.php',
     'ArcanistBrowseRevisionURIHardpointLoader' => 'browse/loader/ArcanistBrowseRevisionURIHardpointLoader.php',
     'ArcanistBrowseURIHardpointLoader' => 'browse/loader/ArcanistBrowseURIHardpointLoader.php',
     'ArcanistBrowseURIRef' => 'browse/ref/ArcanistBrowseURIRef.php',
     'ArcanistBrowseWorkflow' => 'browse/workflow/ArcanistBrowseWorkflow.php',
     'ArcanistBuildPlanRef' => 'ref/ArcanistBuildPlanRef.php',
     'ArcanistBuildRef' => 'ref/ArcanistBuildRef.php',
     'ArcanistBundle' => 'parser/ArcanistBundle.php',
     'ArcanistBundleTestCase' => 'parser/__tests__/ArcanistBundleTestCase.php',
     'ArcanistCSSLintLinter' => 'lint/linter/ArcanistCSSLintLinter.php',
     'ArcanistCSSLintLinterTestCase' => 'lint/linter/__tests__/ArcanistCSSLintLinterTestCase.php',
     'ArcanistCSharpLinter' => 'lint/linter/ArcanistCSharpLinter.php',
     'ArcanistCallConduitWorkflow' => 'workflow/ArcanistCallConduitWorkflow.php',
     'ArcanistCallParenthesesXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCallParenthesesXHPASTLinterRule.php',
     'ArcanistCallParenthesesXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistCallParenthesesXHPASTLinterRuleTestCase.php',
     'ArcanistCallTimePassByReferenceXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCallTimePassByReferenceXHPASTLinterRule.php',
     'ArcanistCallTimePassByReferenceXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistCallTimePassByReferenceXHPASTLinterRuleTestCase.php',
     'ArcanistCapabilityNotSupportedException' => 'workflow/exception/ArcanistCapabilityNotSupportedException.php',
     'ArcanistCastSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCastSpacingXHPASTLinterRule.php',
     'ArcanistCastSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistCastSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistCheckstyleXMLLintRenderer' => 'lint/renderer/ArcanistCheckstyleXMLLintRenderer.php',
     'ArcanistChmodLinter' => 'lint/linter/ArcanistChmodLinter.php',
     'ArcanistChmodLinterTestCase' => 'lint/linter/__tests__/ArcanistChmodLinterTestCase.php',
     'ArcanistClassExtendsObjectXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistClassExtendsObjectXHPASTLinterRule.php',
     'ArcanistClassExtendsObjectXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistClassExtendsObjectXHPASTLinterRuleTestCase.php',
     'ArcanistClassFilenameMismatchXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistClassFilenameMismatchXHPASTLinterRule.php',
     'ArcanistClassMustBeDeclaredAbstractXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistClassMustBeDeclaredAbstractXHPASTLinterRule.php',
     'ArcanistClassMustBeDeclaredAbstractXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistClassMustBeDeclaredAbstractXHPASTLinterRuleTestCase.php',
     'ArcanistClassNameLiteralXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistClassNameLiteralXHPASTLinterRule.php',
     'ArcanistClassNameLiteralXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistClassNameLiteralXHPASTLinterRuleTestCase.php',
     'ArcanistCloseRevisionWorkflow' => 'workflow/ArcanistCloseRevisionWorkflow.php',
     'ArcanistCloseWorkflow' => 'workflow/ArcanistCloseWorkflow.php',
     'ArcanistClosureLinter' => 'lint/linter/ArcanistClosureLinter.php',
     'ArcanistClosureLinterTestCase' => 'lint/linter/__tests__/ArcanistClosureLinterTestCase.php',
     'ArcanistCoffeeLintLinter' => 'lint/linter/ArcanistCoffeeLintLinter.php',
     'ArcanistCoffeeLintLinterTestCase' => 'lint/linter/__tests__/ArcanistCoffeeLintLinterTestCase.php',
     'ArcanistCommentRemover' => 'parser/ArcanistCommentRemover.php',
     'ArcanistCommentRemoverTestCase' => 'parser/__tests__/ArcanistCommentRemoverTestCase.php',
     'ArcanistCommentSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCommentSpacingXHPASTLinterRule.php',
     'ArcanistCommentStyleXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCommentStyleXHPASTLinterRule.php',
     'ArcanistCommentStyleXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistCommentStyleXHPASTLinterRuleTestCase.php',
     'ArcanistCommitRef' => 'ref/ArcanistCommitRef.php',
     'ArcanistCommitUpstreamHardpointLoader' => 'loader/ArcanistCommitUpstreamHardpointLoader.php',
     'ArcanistCommitWorkflow' => 'workflow/ArcanistCommitWorkflow.php',
     'ArcanistCompilerLintRenderer' => 'lint/renderer/ArcanistCompilerLintRenderer.php',
     'ArcanistComposerLinter' => 'lint/linter/ArcanistComposerLinter.php',
     'ArcanistComprehensiveLintEngine' => 'lint/engine/ArcanistComprehensiveLintEngine.php',
     'ArcanistConcatenationOperatorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistConcatenationOperatorXHPASTLinterRule.php',
     'ArcanistConcatenationOperatorXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistConcatenationOperatorXHPASTLinterRuleTestCase.php',
     'ArcanistConduitCall' => 'conduit/ArcanistConduitCall.php',
     'ArcanistConduitEngine' => 'conduit/ArcanistConduitEngine.php',
+    'ArcanistConduitException' => 'conduit/ArcanistConduitException.php',
+    'ArcanistConfigOption' => 'config/option/ArcanistConfigOption.php',
     'ArcanistConfiguration' => 'configuration/ArcanistConfiguration.php',
     'ArcanistConfigurationDrivenLintEngine' => 'lint/engine/ArcanistConfigurationDrivenLintEngine.php',
     'ArcanistConfigurationDrivenUnitTestEngine' => 'unit/engine/ArcanistConfigurationDrivenUnitTestEngine.php',
+    'ArcanistConfigurationEngine' => 'config/ArcanistConfigurationEngine.php',
+    'ArcanistConfigurationEngineExtension' => 'config/ArcanistConfigurationEngineExtension.php',
     'ArcanistConfigurationManager' => 'configuration/ArcanistConfigurationManager.php',
+    'ArcanistConfigurationSource' => 'config/source/ArcanistConfigurationSource.php',
+    'ArcanistConfigurationSourceList' => 'config/ArcanistConfigurationSourceList.php',
+    'ArcanistConfigurationSourceValue' => 'config/ArcanistConfigurationSourceValue.php',
     'ArcanistConsoleLintRenderer' => 'lint/renderer/ArcanistConsoleLintRenderer.php',
     'ArcanistConsoleLintRendererTestCase' => 'lint/renderer/__tests__/ArcanistConsoleLintRendererTestCase.php',
     'ArcanistConstructorParenthesesXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistConstructorParenthesesXHPASTLinterRule.php',
     'ArcanistConstructorParenthesesXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistConstructorParenthesesXHPASTLinterRuleTestCase.php',
     'ArcanistContinueInsideSwitchXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistContinueInsideSwitchXHPASTLinterRule.php',
     'ArcanistContinueInsideSwitchXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistContinueInsideSwitchXHPASTLinterRuleTestCase.php',
     'ArcanistControlStatementSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistControlStatementSpacingXHPASTLinterRule.php',
     'ArcanistControlStatementSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistControlStatementSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistCoverWorkflow' => 'workflow/ArcanistCoverWorkflow.php',
     'ArcanistCppcheckLinter' => 'lint/linter/ArcanistCppcheckLinter.php',
     'ArcanistCppcheckLinterTestCase' => 'lint/linter/__tests__/ArcanistCppcheckLinterTestCase.php',
     'ArcanistCpplintLinter' => 'lint/linter/ArcanistCpplintLinter.php',
     'ArcanistCpplintLinterTestCase' => 'lint/linter/__tests__/ArcanistCpplintLinterTestCase.php',
     'ArcanistCurlyBraceArrayIndexXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistCurlyBraceArrayIndexXHPASTLinterRule.php',
     'ArcanistCurlyBraceArrayIndexXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistCurlyBraceArrayIndexXHPASTLinterRuleTestCase.php',
     'ArcanistDeclarationParenthesesXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDeclarationParenthesesXHPASTLinterRule.php',
     'ArcanistDeclarationParenthesesXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistDeclarationParenthesesXHPASTLinterRuleTestCase.php',
     'ArcanistDefaultParametersXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDefaultParametersXHPASTLinterRule.php',
     'ArcanistDefaultParametersXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistDefaultParametersXHPASTLinterRuleTestCase.php',
+    'ArcanistDefaultsConfigurationSource' => 'config/source/ArcanistDefaultsConfigurationSource.php',
     'ArcanistDeprecationXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDeprecationXHPASTLinterRule.php',
     'ArcanistDeprecationXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistDeprecationXHPASTLinterRuleTestCase.php',
+    'ArcanistDictionaryConfigurationSource' => 'config/source/ArcanistDictionaryConfigurationSource.php',
     'ArcanistDiffByteSizeException' => 'exception/ArcanistDiffByteSizeException.php',
     'ArcanistDiffChange' => 'parser/diff/ArcanistDiffChange.php',
     'ArcanistDiffChangeType' => 'parser/diff/ArcanistDiffChangeType.php',
     'ArcanistDiffHunk' => 'parser/diff/ArcanistDiffHunk.php',
     'ArcanistDiffParser' => 'parser/ArcanistDiffParser.php',
     'ArcanistDiffParserTestCase' => 'parser/__tests__/ArcanistDiffParserTestCase.php',
     'ArcanistDiffUtils' => 'difference/ArcanistDiffUtils.php',
     'ArcanistDiffUtilsTestCase' => 'difference/__tests__/ArcanistDiffUtilsTestCase.php',
     'ArcanistDiffWorkflow' => 'workflow/ArcanistDiffWorkflow.php',
     'ArcanistDifferentialCommitMessage' => 'differential/ArcanistDifferentialCommitMessage.php',
     'ArcanistDifferentialCommitMessageParserException' => 'differential/ArcanistDifferentialCommitMessageParserException.php',
     'ArcanistDifferentialDependencyGraph' => 'differential/ArcanistDifferentialDependencyGraph.php',
     'ArcanistDifferentialRevisionHash' => 'differential/constants/ArcanistDifferentialRevisionHash.php',
     'ArcanistDifferentialRevisionStatus' => 'differential/constants/ArcanistDifferentialRevisionStatus.php',
     'ArcanistDoubleQuoteXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDoubleQuoteXHPASTLinterRule.php',
     'ArcanistDoubleQuoteXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistDoubleQuoteXHPASTLinterRuleTestCase.php',
     'ArcanistDownloadWorkflow' => 'workflow/ArcanistDownloadWorkflow.php',
     'ArcanistDuplicateKeysInArrayXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDuplicateKeysInArrayXHPASTLinterRule.php',
     'ArcanistDuplicateKeysInArrayXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistDuplicateKeysInArrayXHPASTLinterRuleTestCase.php',
     'ArcanistDuplicateSwitchCaseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDuplicateSwitchCaseXHPASTLinterRule.php',
     'ArcanistDuplicateSwitchCaseXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistDuplicateSwitchCaseXHPASTLinterRuleTestCase.php',
     'ArcanistDynamicDefineXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistDynamicDefineXHPASTLinterRule.php',
     'ArcanistDynamicDefineXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistDynamicDefineXHPASTLinterRuleTestCase.php',
     'ArcanistElseIfUsageXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistElseIfUsageXHPASTLinterRule.php',
     'ArcanistElseIfUsageXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistElseIfUsageXHPASTLinterRuleTestCase.php',
     'ArcanistEmptyFileXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistEmptyFileXHPASTLinterRule.php',
     'ArcanistEmptyStatementXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistEmptyStatementXHPASTLinterRule.php',
     'ArcanistEmptyStatementXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistEmptyStatementXHPASTLinterRuleTestCase.php',
     'ArcanistEventType' => 'events/constant/ArcanistEventType.php',
     'ArcanistExitExpressionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistExitExpressionXHPASTLinterRule.php',
     'ArcanistExitExpressionXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistExitExpressionXHPASTLinterRuleTestCase.php',
     'ArcanistExportWorkflow' => 'workflow/ArcanistExportWorkflow.php',
     'ArcanistExternalLinter' => 'lint/linter/ArcanistExternalLinter.php',
     'ArcanistExternalLinterTestCase' => 'lint/linter/__tests__/ArcanistExternalLinterTestCase.php',
     'ArcanistExtractUseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistExtractUseXHPASTLinterRule.php',
     'ArcanistExtractUseXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistExtractUseXHPASTLinterRuleTestCase.php',
     'ArcanistFeatureWorkflow' => 'workflow/ArcanistFeatureWorkflow.php',
+    'ArcanistFileConfigurationSource' => 'config/source/ArcanistFileConfigurationSource.php',
     'ArcanistFileDataRef' => 'upload/ArcanistFileDataRef.php',
     'ArcanistFileUploader' => 'upload/ArcanistFileUploader.php',
     'ArcanistFilenameLinter' => 'lint/linter/ArcanistFilenameLinter.php',
     'ArcanistFilenameLinterTestCase' => 'lint/linter/__tests__/ArcanistFilenameLinterTestCase.php',
+    'ArcanistFilesystemConfigurationSource' => 'config/source/ArcanistFilesystemConfigurationSource.php',
     'ArcanistFlagWorkflow' => 'workflow/ArcanistFlagWorkflow.php',
     'ArcanistFlake8Linter' => 'lint/linter/ArcanistFlake8Linter.php',
     'ArcanistFlake8LinterTestCase' => 'lint/linter/__tests__/ArcanistFlake8LinterTestCase.php',
     'ArcanistFormattedStringXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistFormattedStringXHPASTLinterRule.php',
     'ArcanistFormattedStringXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistFormattedStringXHPASTLinterRuleTestCase.php',
     'ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRule.php',
     'ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRuleTestCase.php',
     'ArcanistFutureLinter' => 'lint/linter/ArcanistFutureLinter.php',
     'ArcanistGeneratedLinter' => 'lint/linter/ArcanistGeneratedLinter.php',
     'ArcanistGeneratedLinterTestCase' => 'lint/linter/__tests__/ArcanistGeneratedLinterTestCase.php',
     'ArcanistGetConfigWorkflow' => 'workflow/ArcanistGetConfigWorkflow.php',
     'ArcanistGitAPI' => 'repository/api/ArcanistGitAPI.php',
     'ArcanistGitCommitMessageHardpointLoader' => 'loader/ArcanistGitCommitMessageHardpointLoader.php',
     'ArcanistGitHardpointLoader' => 'loader/ArcanistGitHardpointLoader.php',
     'ArcanistGitLandEngine' => 'land/ArcanistGitLandEngine.php',
     'ArcanistGitRevisionHardpointLoader' => 'loader/ArcanistGitRevisionHardpointLoader.php',
     'ArcanistGitUpstreamPath' => 'repository/api/ArcanistGitUpstreamPath.php',
+    'ArcanistGitWorkingCopy' => 'workingcopy/ArcanistGitWorkingCopy.php',
     'ArcanistGlobalVariableXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistGlobalVariableXHPASTLinterRule.php',
     'ArcanistGlobalVariableXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistGlobalVariableXHPASTLinterRuleTestCase.php',
     'ArcanistGoLintLinter' => 'lint/linter/ArcanistGoLintLinter.php',
     'ArcanistGoLintLinterTestCase' => 'lint/linter/__tests__/ArcanistGoLintLinterTestCase.php',
     'ArcanistGoTestResultParser' => 'unit/parser/ArcanistGoTestResultParser.php',
     'ArcanistGoTestResultParserTestCase' => 'unit/parser/__tests__/ArcanistGoTestResultParserTestCase.php',
     'ArcanistHLintLinter' => 'lint/linter/ArcanistHLintLinter.php',
     'ArcanistHLintLinterTestCase' => 'lint/linter/__tests__/ArcanistHLintLinterTestCase.php',
     'ArcanistHardpointLoader' => 'loader/ArcanistHardpointLoader.php',
     'ArcanistHelpWorkflow' => 'workflow/ArcanistHelpWorkflow.php',
     'ArcanistHexadecimalNumericScalarCasingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistHexadecimalNumericScalarCasingXHPASTLinterRule.php',
     'ArcanistHexadecimalNumericScalarCasingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistHexadecimalNumericScalarCasingXHPASTLinterRuleTestCase.php',
     'ArcanistHgClientChannel' => 'hgdaemon/ArcanistHgClientChannel.php',
     'ArcanistHgProxyClient' => 'hgdaemon/ArcanistHgProxyClient.php',
     'ArcanistHgProxyServer' => 'hgdaemon/ArcanistHgProxyServer.php',
     'ArcanistHgServerChannel' => 'hgdaemon/ArcanistHgServerChannel.php',
     'ArcanistImplicitConstructorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistImplicitConstructorXHPASTLinterRule.php',
     'ArcanistImplicitConstructorXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistImplicitConstructorXHPASTLinterRuleTestCase.php',
     'ArcanistImplicitFallthroughXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistImplicitFallthroughXHPASTLinterRule.php',
     'ArcanistImplicitFallthroughXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistImplicitFallthroughXHPASTLinterRuleTestCase.php',
     'ArcanistImplicitVisibilityXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistImplicitVisibilityXHPASTLinterRule.php',
     'ArcanistImplicitVisibilityXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistImplicitVisibilityXHPASTLinterRuleTestCase.php',
     'ArcanistImplodeArgumentOrderXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistImplodeArgumentOrderXHPASTLinterRule.php',
     'ArcanistImplodeArgumentOrderXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistImplodeArgumentOrderXHPASTLinterRuleTestCase.php',
     'ArcanistInlineHTMLXHPASTLinterRule' => 'lint/linter/ArcanistInlineHTMLXHPASTLinterRule.php',
     'ArcanistInlineHTMLXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInlineHTMLXHPASTLinterRuleTestCase.php',
     'ArcanistInnerFunctionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistInnerFunctionXHPASTLinterRule.php',
     'ArcanistInnerFunctionXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInnerFunctionXHPASTLinterRuleTestCase.php',
     'ArcanistInstallCertificateWorkflow' => 'workflow/ArcanistInstallCertificateWorkflow.php',
     'ArcanistInstanceOfOperatorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistInstanceOfOperatorXHPASTLinterRule.php',
     'ArcanistInstanceofOperatorXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInstanceofOperatorXHPASTLinterRuleTestCase.php',
     'ArcanistInterfaceAbstractMethodXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistInterfaceAbstractMethodXHPASTLinterRule.php',
     'ArcanistInterfaceAbstractMethodXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInterfaceAbstractMethodXHPASTLinterRuleTestCase.php',
     'ArcanistInterfaceMethodBodyXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistInterfaceMethodBodyXHPASTLinterRule.php',
     'ArcanistInterfaceMethodBodyXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInterfaceMethodBodyXHPASTLinterRuleTestCase.php',
     'ArcanistInvalidDefaultParameterXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistInvalidDefaultParameterXHPASTLinterRule.php',
     'ArcanistInvalidDefaultParameterXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInvalidDefaultParameterXHPASTLinterRuleTestCase.php',
     'ArcanistInvalidModifiersXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistInvalidModifiersXHPASTLinterRule.php',
     'ArcanistInvalidModifiersXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInvalidModifiersXHPASTLinterRuleTestCase.php',
     'ArcanistInvalidOctalNumericScalarXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistInvalidOctalNumericScalarXHPASTLinterRule.php',
     'ArcanistInvalidOctalNumericScalarXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistInvalidOctalNumericScalarXHPASTLinterRuleTestCase.php',
     'ArcanistIsAShouldBeInstanceOfXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistIsAShouldBeInstanceOfXHPASTLinterRule.php',
     'ArcanistIsAShouldBeInstanceOfXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistIsAShouldBeInstanceOfXHPASTLinterRuleTestCase.php',
     'ArcanistJSHintLinter' => 'lint/linter/ArcanistJSHintLinter.php',
     'ArcanistJSHintLinterTestCase' => 'lint/linter/__tests__/ArcanistJSHintLinterTestCase.php',
     'ArcanistJSONLintLinter' => 'lint/linter/ArcanistJSONLintLinter.php',
     'ArcanistJSONLintRenderer' => 'lint/renderer/ArcanistJSONLintRenderer.php',
     'ArcanistJSONLinter' => 'lint/linter/ArcanistJSONLinter.php',
     'ArcanistJSONLinterTestCase' => 'lint/linter/__tests__/ArcanistJSONLinterTestCase.php',
     'ArcanistJscsLinter' => 'lint/linter/ArcanistJscsLinter.php',
     'ArcanistJscsLinterTestCase' => 'lint/linter/__tests__/ArcanistJscsLinterTestCase.php',
     'ArcanistKeywordCasingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistKeywordCasingXHPASTLinterRule.php',
     'ArcanistKeywordCasingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistKeywordCasingXHPASTLinterRuleTestCase.php',
     'ArcanistLambdaFuncFunctionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistLambdaFuncFunctionXHPASTLinterRule.php',
     'ArcanistLambdaFuncFunctionXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistLambdaFuncFunctionXHPASTLinterRuleTestCase.php',
     'ArcanistLandEngine' => 'land/ArcanistLandEngine.php',
     'ArcanistLandWorkflow' => 'workflow/ArcanistLandWorkflow.php',
     'ArcanistLanguageConstructParenthesesXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistLanguageConstructParenthesesXHPASTLinterRule.php',
     'ArcanistLanguageConstructParenthesesXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistLanguageConstructParenthesesXHPASTLinterRuleTestCase.php',
     'ArcanistLesscLinter' => 'lint/linter/ArcanistLesscLinter.php',
     'ArcanistLesscLinterTestCase' => 'lint/linter/__tests__/ArcanistLesscLinterTestCase.php',
     'ArcanistLiberateWorkflow' => 'workflow/ArcanistLiberateWorkflow.php',
-    'ArcanistLibraryTestCase' => '__tests__/ArcanistLibraryTestCase.php',
     'ArcanistLintEngine' => 'lint/engine/ArcanistLintEngine.php',
     'ArcanistLintMessage' => 'lint/ArcanistLintMessage.php',
     'ArcanistLintMessageTestCase' => 'lint/__tests__/ArcanistLintMessageTestCase.php',
     'ArcanistLintPatcher' => 'lint/ArcanistLintPatcher.php',
     'ArcanistLintRenderer' => 'lint/renderer/ArcanistLintRenderer.php',
     'ArcanistLintResult' => 'lint/ArcanistLintResult.php',
     'ArcanistLintSeverity' => 'lint/ArcanistLintSeverity.php',
     'ArcanistLintWorkflow' => 'workflow/ArcanistLintWorkflow.php',
     'ArcanistLinter' => 'lint/linter/ArcanistLinter.php',
     'ArcanistLinterStandard' => 'lint/linter/standards/ArcanistLinterStandard.php',
     'ArcanistLinterStandardTestCase' => 'lint/linter/standards/__tests__/ArcanistLinterStandardTestCase.php',
     'ArcanistLinterTestCase' => 'lint/linter/__tests__/ArcanistLinterTestCase.php',
     'ArcanistLintersWorkflow' => 'workflow/ArcanistLintersWorkflow.php',
     'ArcanistListAssignmentXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistListAssignmentXHPASTLinterRule.php',
     'ArcanistListAssignmentXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistListAssignmentXHPASTLinterRuleTestCase.php',
+    'ArcanistListConfigOption' => 'config/option/ArcanistListConfigOption.php',
     'ArcanistListWorkflow' => 'workflow/ArcanistListWorkflow.php',
+    'ArcanistLocalConfigurationSource' => 'config/source/ArcanistLocalConfigurationSource.php',
+    'ArcanistLogEngine' => 'log/ArcanistLogEngine.php',
+    'ArcanistLogMessage' => 'log/ArcanistLogMessage.php',
     'ArcanistLogicalOperatorsXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistLogicalOperatorsXHPASTLinterRule.php',
     'ArcanistLogicalOperatorsXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistLogicalOperatorsXHPASTLinterRuleTestCase.php',
     'ArcanistLowercaseFunctionsXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistLowercaseFunctionsXHPASTLinterRule.php',
     'ArcanistLowercaseFunctionsXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistLowercaseFunctionsXHPASTLinterRuleTestCase.php',
     'ArcanistMercurialAPI' => 'repository/api/ArcanistMercurialAPI.php',
     'ArcanistMercurialBranchCommitHardpointLoader' => 'loader/ArcanistMercurialBranchCommitHardpointLoader.php',
     'ArcanistMercurialHardpointLoader' => 'loader/ArcanistMercurialHardpointLoader.php',
     'ArcanistMercurialParser' => 'repository/parser/ArcanistMercurialParser.php',
     'ArcanistMercurialParserTestCase' => 'repository/parser/__tests__/ArcanistMercurialParserTestCase.php',
+    'ArcanistMercurialWorkingCopy' => 'workingcopy/ArcanistMercurialWorkingCopy.php',
     'ArcanistMercurialWorkingCopyCommitHardpointLoader' => 'loader/ArcanistMercurialWorkingCopyCommitHardpointLoader.php',
     'ArcanistMergeConflictLinter' => 'lint/linter/ArcanistMergeConflictLinter.php',
     'ArcanistMergeConflictLinterTestCase' => 'lint/linter/__tests__/ArcanistMergeConflictLinterTestCase.php',
     'ArcanistMessageRevisionHardpointLoader' => 'loader/ArcanistMessageRevisionHardpointLoader.php',
     'ArcanistMissingLinterException' => 'lint/linter/exception/ArcanistMissingLinterException.php',
     'ArcanistModifierOrderingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistModifierOrderingXHPASTLinterRule.php',
     'ArcanistModifierOrderingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistModifierOrderingXHPASTLinterRuleTestCase.php',
     'ArcanistNamespaceFirstStatementXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistNamespaceFirstStatementXHPASTLinterRule.php',
     'ArcanistNamespaceFirstStatementXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistNamespaceFirstStatementXHPASTLinterRuleTestCase.php',
     'ArcanistNamingConventionsXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistNamingConventionsXHPASTLinterRule.php',
     'ArcanistNamingConventionsXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistNamingConventionsXHPASTLinterRuleTestCase.php',
     'ArcanistNestedNamespacesXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistNestedNamespacesXHPASTLinterRule.php',
     'ArcanistNestedNamespacesXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistNestedNamespacesXHPASTLinterRuleTestCase.php',
     'ArcanistNewlineAfterOpenTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistNewlineAfterOpenTagXHPASTLinterRule.php',
     'ArcanistNewlineAfterOpenTagXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistNewlineAfterOpenTagXHPASTLinterRuleTestCase.php',
     'ArcanistNoEffectException' => 'exception/usage/ArcanistNoEffectException.php',
     'ArcanistNoEngineException' => 'exception/usage/ArcanistNoEngineException.php',
     'ArcanistNoLintLinter' => 'lint/linter/ArcanistNoLintLinter.php',
     'ArcanistNoLintLinterTestCase' => 'lint/linter/__tests__/ArcanistNoLintLinterTestCase.php',
     'ArcanistNoParentScopeXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistNoParentScopeXHPASTLinterRule.php',
     'ArcanistNoParentScopeXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistNoParentScopeXHPASTLinterRuleTestCase.php',
+    'ArcanistNoURIConduitException' => 'conduit/ArcanistNoURIConduitException.php',
     'ArcanistNoneLintRenderer' => 'lint/renderer/ArcanistNoneLintRenderer.php',
     'ArcanistObjectOperatorSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistObjectOperatorSpacingXHPASTLinterRule.php',
     'ArcanistObjectOperatorSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistObjectOperatorSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistPEP8Linter' => 'lint/linter/ArcanistPEP8Linter.php',
     'ArcanistPEP8LinterTestCase' => 'lint/linter/__tests__/ArcanistPEP8LinterTestCase.php',
     'ArcanistPHPCloseTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPCloseTagXHPASTLinterRule.php',
     'ArcanistPHPCloseTagXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPHPCloseTagXHPASTLinterRuleTestCase.php',
     'ArcanistPHPCompatibilityXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPCompatibilityXHPASTLinterRule.php',
     'ArcanistPHPCompatibilityXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPHPCompatibilityXHPASTLinterRuleTestCase.php',
     'ArcanistPHPEchoTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPEchoTagXHPASTLinterRule.php',
     'ArcanistPHPEchoTagXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPHPEchoTagXHPASTLinterRuleTestCase.php',
     'ArcanistPHPOpenTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPOpenTagXHPASTLinterRule.php',
     'ArcanistPHPOpenTagXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPHPOpenTagXHPASTLinterRuleTestCase.php',
     'ArcanistPHPShortTagXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPHPShortTagXHPASTLinterRule.php',
     'ArcanistPHPShortTagXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPHPShortTagXHPASTLinterRuleTestCase.php',
     'ArcanistPaamayimNekudotayimSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPaamayimNekudotayimSpacingXHPASTLinterRule.php',
     'ArcanistPaamayimNekudotayimSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPaamayimNekudotayimSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistParentMemberReferenceXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistParentMemberReferenceXHPASTLinterRule.php',
     'ArcanistParentMemberReferenceXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistParentMemberReferenceXHPASTLinterRuleTestCase.php',
     'ArcanistParenthesesSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistParenthesesSpacingXHPASTLinterRule.php',
     'ArcanistParenthesesSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistParenthesesSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistParseStrUseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistParseStrUseXHPASTLinterRule.php',
     'ArcanistParseStrUseXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistParseStrUseXHPASTLinterRuleTestCase.php',
     'ArcanistPasteWorkflow' => 'workflow/ArcanistPasteWorkflow.php',
     'ArcanistPatchWorkflow' => 'workflow/ArcanistPatchWorkflow.php',
+    'ArcanistPhageToolset' => 'toolset/ArcanistPhageToolset.php',
     'ArcanistPhpLinter' => 'lint/linter/ArcanistPhpLinter.php',
     'ArcanistPhpLinterTestCase' => 'lint/linter/__tests__/ArcanistPhpLinterTestCase.php',
     'ArcanistPhpcsLinter' => 'lint/linter/ArcanistPhpcsLinter.php',
     'ArcanistPhpcsLinterTestCase' => 'lint/linter/__tests__/ArcanistPhpcsLinterTestCase.php',
     'ArcanistPhpunitTestResultParser' => 'unit/parser/ArcanistPhpunitTestResultParser.php',
     'ArcanistPhrequentWorkflow' => 'workflow/ArcanistPhrequentWorkflow.php',
     'ArcanistPhutilLibraryLinter' => 'lint/linter/ArcanistPhutilLibraryLinter.php',
+    'ArcanistPhutilWorkflow' => 'toolset/ArcanistPhutilWorkflow.php',
     'ArcanistPhutilXHPASTLinterStandard' => 'lint/linter/standards/phutil/ArcanistPhutilXHPASTLinterStandard.php',
     'ArcanistPlusOperatorOnStringsXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPlusOperatorOnStringsXHPASTLinterRule.php',
     'ArcanistPlusOperatorOnStringsXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPlusOperatorOnStringsXHPASTLinterRuleTestCase.php',
     'ArcanistPregQuoteMisuseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPregQuoteMisuseXHPASTLinterRule.php',
     'ArcanistPregQuoteMisuseXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPregQuoteMisuseXHPASTLinterRuleTestCase.php',
+    'ArcanistProjectConfigurationSource' => 'config/source/ArcanistProjectConfigurationSource.php',
+    'ArcanistPrompt' => 'toolset/ArcanistPrompt.php',
     'ArcanistPublicPropertyXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistPublicPropertyXHPASTLinterRule.php',
     'ArcanistPublicPropertyXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistPublicPropertyXHPASTLinterRuleTestCase.php',
     'ArcanistPuppetLintLinter' => 'lint/linter/ArcanistPuppetLintLinter.php',
     'ArcanistPuppetLintLinterTestCase' => 'lint/linter/__tests__/ArcanistPuppetLintLinterTestCase.php',
     'ArcanistPyFlakesLinter' => 'lint/linter/ArcanistPyFlakesLinter.php',
     'ArcanistPyFlakesLinterTestCase' => 'lint/linter/__tests__/ArcanistPyFlakesLinterTestCase.php',
     'ArcanistPyLintLinter' => 'lint/linter/ArcanistPyLintLinter.php',
     'ArcanistPyLintLinterTestCase' => 'lint/linter/__tests__/ArcanistPyLintLinterTestCase.php',
     'ArcanistRaggedClassTreeEdgeXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistRaggedClassTreeEdgeXHPASTLinterRule.php',
     'ArcanistRaggedClassTreeEdgeXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistRaggedClassTreeEdgeXHPASTLinterRuleTestCase.php',
     'ArcanistRef' => 'ref/ArcanistRef.php',
     'ArcanistRefQuery' => 'ref/ArcanistRefQuery.php',
     'ArcanistRepositoryAPI' => 'repository/api/ArcanistRepositoryAPI.php',
     'ArcanistRepositoryAPIMiscTestCase' => 'repository/api/__tests__/ArcanistRepositoryAPIMiscTestCase.php',
     'ArcanistRepositoryAPIStateTestCase' => 'repository/api/__tests__/ArcanistRepositoryAPIStateTestCase.php',
     'ArcanistRepositoryRef' => 'ref/ArcanistRepositoryRef.php',
     'ArcanistReusedAsIteratorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistReusedAsIteratorXHPASTLinterRule.php',
     'ArcanistReusedAsIteratorXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistReusedAsIteratorXHPASTLinterRuleTestCase.php',
     'ArcanistReusedIteratorReferenceXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistReusedIteratorReferenceXHPASTLinterRule.php',
     'ArcanistReusedIteratorReferenceXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistReusedIteratorReferenceXHPASTLinterRuleTestCase.php',
     'ArcanistReusedIteratorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistReusedIteratorXHPASTLinterRule.php',
     'ArcanistReusedIteratorXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistReusedIteratorXHPASTLinterRuleTestCase.php',
     'ArcanistRevertWorkflow' => 'workflow/ArcanistRevertWorkflow.php',
     'ArcanistRevisionRef' => 'ref/ArcanistRevisionRef.php',
     'ArcanistRevisionRefSource' => 'ref/ArcanistRevisionRefSource.php',
     'ArcanistRuboCopLinter' => 'lint/linter/ArcanistRuboCopLinter.php',
     'ArcanistRuboCopLinterTestCase' => 'lint/linter/__tests__/ArcanistRuboCopLinterTestCase.php',
     'ArcanistRubyLinter' => 'lint/linter/ArcanistRubyLinter.php',
     'ArcanistRubyLinterTestCase' => 'lint/linter/__tests__/ArcanistRubyLinterTestCase.php',
+    'ArcanistRuntime' => 'runtime/ArcanistRuntime.php',
+    'ArcanistRuntimeConfigurationSource' => 'config/source/ArcanistRuntimeConfigurationSource.php',
+    'ArcanistScalarConfigOption' => 'config/option/ArcanistScalarConfigOption.php',
     'ArcanistScriptAndRegexLinter' => 'lint/linter/ArcanistScriptAndRegexLinter.php',
     'ArcanistSelfClassReferenceXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSelfClassReferenceXHPASTLinterRule.php',
     'ArcanistSelfClassReferenceXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistSelfClassReferenceXHPASTLinterRuleTestCase.php',
     'ArcanistSelfMemberReferenceXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSelfMemberReferenceXHPASTLinterRule.php',
     'ArcanistSelfMemberReferenceXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistSelfMemberReferenceXHPASTLinterRuleTestCase.php',
     'ArcanistSemicolonSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSemicolonSpacingXHPASTLinterRule.php',
     'ArcanistSemicolonSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistSemicolonSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistSetConfigWorkflow' => 'workflow/ArcanistSetConfigWorkflow.php',
     'ArcanistSetting' => 'configuration/ArcanistSetting.php',
     'ArcanistSettings' => 'configuration/ArcanistSettings.php',
     'ArcanistShellCompleteWorkflow' => 'workflow/ArcanistShellCompleteWorkflow.php',
     'ArcanistSingleLintEngine' => 'lint/engine/ArcanistSingleLintEngine.php',
     'ArcanistSlownessXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSlownessXHPASTLinterRule.php',
     'ArcanistSlownessXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistSlownessXHPASTLinterRuleTestCase.php',
     'ArcanistSpellingLinter' => 'lint/linter/ArcanistSpellingLinter.php',
     'ArcanistSpellingLinterTestCase' => 'lint/linter/__tests__/ArcanistSpellingLinterTestCase.php',
     'ArcanistStartWorkflow' => 'workflow/ArcanistStartWorkflow.php',
     'ArcanistStaticThisXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistStaticThisXHPASTLinterRule.php',
     'ArcanistStaticThisXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistStaticThisXHPASTLinterRuleTestCase.php',
     'ArcanistStopWorkflow' => 'workflow/ArcanistStopWorkflow.php',
+    'ArcanistStringConfigOption' => 'config/option/ArcanistStringConfigOption.php',
     'ArcanistSubversionAPI' => 'repository/api/ArcanistSubversionAPI.php',
+    'ArcanistSubversionWorkingCopy' => 'workingcopy/ArcanistSubversionWorkingCopy.php',
     'ArcanistSummaryLintRenderer' => 'lint/renderer/ArcanistSummaryLintRenderer.php',
     'ArcanistSyntaxErrorXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistSyntaxErrorXHPASTLinterRule.php',
+    'ArcanistSystemConfigurationSource' => 'config/source/ArcanistSystemConfigurationSource.php',
     'ArcanistTasksWorkflow' => 'workflow/ArcanistTasksWorkflow.php',
     'ArcanistTautologicalExpressionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistTautologicalExpressionXHPASTLinterRule.php',
     'ArcanistTautologicalExpressionXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistTautologicalExpressionXHPASTLinterRuleTestCase.php',
     'ArcanistTestResultParser' => 'unit/parser/ArcanistTestResultParser.php',
     'ArcanistTestXHPASTLintSwitchHook' => 'lint/linter/__tests__/ArcanistTestXHPASTLintSwitchHook.php',
     'ArcanistTextLinter' => 'lint/linter/ArcanistTextLinter.php',
     'ArcanistTextLinterTestCase' => 'lint/linter/__tests__/ArcanistTextLinterTestCase.php',
     'ArcanistThisReassignmentXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistThisReassignmentXHPASTLinterRule.php',
     'ArcanistThisReassignmentXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistThisReassignmentXHPASTLinterRuleTestCase.php',
     'ArcanistTimeWorkflow' => 'workflow/ArcanistTimeWorkflow.php',
     'ArcanistToStringExceptionXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistToStringExceptionXHPASTLinterRule.php',
     'ArcanistToStringExceptionXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistToStringExceptionXHPASTLinterRuleTestCase.php',
     'ArcanistTodoCommentXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistTodoCommentXHPASTLinterRule.php',
     'ArcanistTodoCommentXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistTodoCommentXHPASTLinterRuleTestCase.php',
     'ArcanistTodoWorkflow' => 'workflow/ArcanistTodoWorkflow.php',
+    'ArcanistToolset' => 'toolset/ArcanistToolset.php',
     'ArcanistUSEnglishTranslation' => 'internationalization/ArcanistUSEnglishTranslation.php',
     'ArcanistUnableToParseXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnableToParseXHPASTLinterRule.php',
     'ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRule.php',
     'ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRule.php',
     'ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistUndeclaredVariableXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUndeclaredVariableXHPASTLinterRule.php',
     'ArcanistUndeclaredVariableXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUndeclaredVariableXHPASTLinterRuleTestCase.php',
     'ArcanistUnexpectedReturnValueXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnexpectedReturnValueXHPASTLinterRule.php',
     'ArcanistUnexpectedReturnValueXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUnexpectedReturnValueXHPASTLinterRuleTestCase.php',
     'ArcanistUnitConsoleRenderer' => 'unit/renderer/ArcanistUnitConsoleRenderer.php',
     'ArcanistUnitRenderer' => 'unit/renderer/ArcanistUnitRenderer.php',
     'ArcanistUnitTestEngine' => 'unit/engine/ArcanistUnitTestEngine.php',
     'ArcanistUnitTestResult' => 'unit/ArcanistUnitTestResult.php',
     'ArcanistUnitTestResultTestCase' => 'unit/__tests__/ArcanistUnitTestResultTestCase.php',
     'ArcanistUnitTestableLintEngine' => 'lint/engine/ArcanistUnitTestableLintEngine.php',
     'ArcanistUnitWorkflow' => 'workflow/ArcanistUnitWorkflow.php',
     'ArcanistUnnecessaryFinalModifierXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnnecessaryFinalModifierXHPASTLinterRule.php',
     'ArcanistUnnecessaryFinalModifierXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUnnecessaryFinalModifierXHPASTLinterRuleTestCase.php',
     'ArcanistUnnecessarySemicolonXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnnecessarySemicolonXHPASTLinterRule.php',
     'ArcanistUnnecessarySymbolAliasXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnnecessarySymbolAliasXHPASTLinterRule.php',
     'ArcanistUnnecessarySymbolAliasXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUnnecessarySymbolAliasXHPASTLinterRuleTestCase.php',
     'ArcanistUnsafeDynamicStringXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUnsafeDynamicStringXHPASTLinterRule.php',
     'ArcanistUnsafeDynamicStringXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUnsafeDynamicStringXHPASTLinterRuleTestCase.php',
     'ArcanistUpgradeWorkflow' => 'workflow/ArcanistUpgradeWorkflow.php',
     'ArcanistUploadWorkflow' => 'workflow/ArcanistUploadWorkflow.php',
     'ArcanistUsageException' => 'exception/ArcanistUsageException.php',
     'ArcanistUseStatementNamespacePrefixXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUseStatementNamespacePrefixXHPASTLinterRule.php',
     'ArcanistUseStatementNamespacePrefixXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUseStatementNamespacePrefixXHPASTLinterRuleTestCase.php',
     'ArcanistUselessOverridingMethodXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistUselessOverridingMethodXHPASTLinterRule.php',
     'ArcanistUselessOverridingMethodXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistUselessOverridingMethodXHPASTLinterRuleTestCase.php',
     'ArcanistUserAbortException' => 'exception/usage/ArcanistUserAbortException.php',
+    'ArcanistUserConfigurationSource' => 'config/source/ArcanistUserConfigurationSource.php',
     'ArcanistVariableReferenceSpacingXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistVariableReferenceSpacingXHPASTLinterRule.php',
     'ArcanistVariableReferenceSpacingXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistVariableReferenceSpacingXHPASTLinterRuleTestCase.php',
     'ArcanistVariableVariableXHPASTLinterRule' => 'lint/linter/xhpast/rules/ArcanistVariableVariableXHPASTLinterRule.php',
     'ArcanistVariableVariableXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistVariableVariableXHPASTLinterRuleTestCase.php',
     'ArcanistVersionWorkflow' => 'workflow/ArcanistVersionWorkflow.php',
     'ArcanistWeldWorkflow' => 'workflow/ArcanistWeldWorkflow.php',
     'ArcanistWhichWorkflow' => 'workflow/ArcanistWhichWorkflow.php',
+    'ArcanistWildConfigOption' => 'config/option/ArcanistWildConfigOption.php',
     'ArcanistWorkflow' => 'workflow/ArcanistWorkflow.php',
+    'ArcanistWorkflowArgument' => 'toolset/ArcanistWorkflowArgument.php',
+    'ArcanistWorkflowInformation' => 'toolset/ArcanistWorkflowInformation.php',
+    'ArcanistWorkingCopy' => 'workingcopy/ArcanistWorkingCopy.php',
+    'ArcanistWorkingCopyConfigurationSource' => 'config/source/ArcanistWorkingCopyConfigurationSource.php',
     'ArcanistWorkingCopyIdentity' => 'workingcopyidentity/ArcanistWorkingCopyIdentity.php',
+    'ArcanistWorkingCopyPath' => 'workingcopy/ArcanistWorkingCopyPath.php',
     'ArcanistWorkingCopyStateRef' => 'ref/ArcanistWorkingCopyStateRef.php',
     'ArcanistXHPASTLintNamingHook' => 'lint/linter/xhpast/ArcanistXHPASTLintNamingHook.php',
     'ArcanistXHPASTLintNamingHookTestCase' => 'lint/linter/xhpast/__tests__/ArcanistXHPASTLintNamingHookTestCase.php',
     'ArcanistXHPASTLintSwitchHook' => 'lint/linter/xhpast/ArcanistXHPASTLintSwitchHook.php',
     'ArcanistXHPASTLinter' => 'lint/linter/ArcanistXHPASTLinter.php',
     'ArcanistXHPASTLinterRule' => 'lint/linter/xhpast/ArcanistXHPASTLinterRule.php',
     'ArcanistXHPASTLinterRuleTestCase' => 'lint/linter/xhpast/rules/__tests__/ArcanistXHPASTLinterRuleTestCase.php',
     'ArcanistXHPASTLinterTestCase' => 'lint/linter/__tests__/ArcanistXHPASTLinterTestCase.php',
     'ArcanistXMLLinter' => 'lint/linter/ArcanistXMLLinter.php',
     'ArcanistXMLLinterTestCase' => 'lint/linter/__tests__/ArcanistXMLLinterTestCase.php',
     'ArcanistXUnitTestResultParser' => 'unit/parser/ArcanistXUnitTestResultParser.php',
     'BaseHTTPFuture' => 'future/http/BaseHTTPFuture.php',
     'CSharpToolsTestEngine' => 'unit/engine/CSharpToolsTestEngine.php',
     'CaseInsensitiveArray' => 'utils/CaseInsensitiveArray.php',
     'CaseInsensitiveArrayTestCase' => 'utils/__tests__/CaseInsensitiveArrayTestCase.php',
     'CommandException' => 'future/exec/CommandException.php',
     'ConduitClient' => 'conduit/ConduitClient.php',
     'ConduitClientException' => 'conduit/ConduitClientException.php',
     'ConduitClientTestCase' => 'conduit/__tests__/ConduitClientTestCase.php',
     'ConduitFuture' => 'conduit/ConduitFuture.php',
     'ExecFuture' => 'future/exec/ExecFuture.php',
     'ExecFutureTestCase' => 'future/exec/__tests__/ExecFutureTestCase.php',
     'ExecPassthruTestCase' => 'future/exec/__tests__/ExecPassthruTestCase.php',
     'FileFinder' => 'filesystem/FileFinder.php',
     'FileFinderTestCase' => 'filesystem/__tests__/FileFinderTestCase.php',
     'FileList' => 'filesystem/FileList.php',
     'Filesystem' => 'filesystem/Filesystem.php',
     'FilesystemException' => 'filesystem/FilesystemException.php',
     'FilesystemTestCase' => 'filesystem/__tests__/FilesystemTestCase.php',
     'Future' => 'future/Future.php',
     'FutureIterator' => 'future/FutureIterator.php',
     'FutureIteratorTestCase' => 'future/__tests__/FutureIteratorTestCase.php',
     'FutureProxy' => 'future/FutureProxy.php',
     'HTTPFuture' => 'future/http/HTTPFuture.php',
     'HTTPFutureCURLResponseStatus' => 'future/http/status/HTTPFutureCURLResponseStatus.php',
     'HTTPFutureCertificateResponseStatus' => 'future/http/status/HTTPFutureCertificateResponseStatus.php',
     'HTTPFutureHTTPResponseStatus' => 'future/http/status/HTTPFutureHTTPResponseStatus.php',
     'HTTPFutureParseResponseStatus' => 'future/http/status/HTTPFutureParseResponseStatus.php',
     'HTTPFutureResponseStatus' => 'future/http/status/HTTPFutureResponseStatus.php',
     'HTTPFutureTransportResponseStatus' => 'future/http/status/HTTPFutureTransportResponseStatus.php',
     'HTTPSFuture' => 'future/http/HTTPSFuture.php',
     'ImmediateFuture' => 'future/ImmediateFuture.php',
     'LibphutilUSEnglishTranslation' => 'internationalization/translation/LibphutilUSEnglishTranslation.php',
     'LinesOfALarge' => 'filesystem/linesofalarge/LinesOfALarge.php',
     'LinesOfALargeExecFuture' => 'filesystem/linesofalarge/LinesOfALargeExecFuture.php',
     'LinesOfALargeExecFutureTestCase' => 'filesystem/linesofalarge/__tests__/LinesOfALargeExecFutureTestCase.php',
     'LinesOfALargeFile' => 'filesystem/linesofalarge/LinesOfALargeFile.php',
     'LinesOfALargeFileTestCase' => 'filesystem/linesofalarge/__tests__/LinesOfALargeFileTestCase.php',
     'MFilterTestHelper' => 'utils/__tests__/MFilterTestHelper.php',
     'NoseTestEngine' => 'unit/engine/NoseTestEngine.php',
     'PHPASTParserTestCase' => 'parser/xhpast/__tests__/PHPASTParserTestCase.php',
     'PhageAction' => 'phage/action/PhageAction.php',
     'PhageAgentAction' => 'phage/action/PhageAgentAction.php',
     'PhageAgentBootloader' => 'phage/bootloader/PhageAgentBootloader.php',
     'PhageAgentTestCase' => 'phage/__tests__/PhageAgentTestCase.php',
     'PhageExecuteAction' => 'phage/action/PhageExecuteAction.php',
     'PhageLocalAction' => 'phage/action/PhageLocalAction.php',
     'PhagePHPAgent' => 'phage/agent/PhagePHPAgent.php',
     'PhagePHPAgentBootloader' => 'phage/bootloader/PhagePHPAgentBootloader.php',
     'PhagePlanAction' => 'phage/action/PhagePlanAction.php',
     'PhageWorkflow' => 'phage/workflow/PhageWorkflow.php',
     'Phobject' => 'object/Phobject.php',
     'PhobjectTestCase' => 'object/__tests__/PhobjectTestCase.php',
     'PhpunitTestEngine' => 'unit/engine/PhpunitTestEngine.php',
     'PhpunitTestEngineTestCase' => 'unit/engine/__tests__/PhpunitTestEngineTestCase.php',
     'PhutilAWSCloudFormationFuture' => 'future/aws/PhutilAWSCloudFormationFuture.php',
     'PhutilAWSCloudWatchFuture' => 'future/aws/PhutilAWSCloudWatchFuture.php',
     'PhutilAWSEC2Future' => 'future/aws/PhutilAWSEC2Future.php',
     'PhutilAWSException' => 'future/aws/PhutilAWSException.php',
     'PhutilAWSFuture' => 'future/aws/PhutilAWSFuture.php',
     'PhutilAWSManagementWorkflow' => 'future/aws/management/PhutilAWSManagementWorkflow.php',
     'PhutilAWSS3DeleteManagementWorkflow' => 'future/aws/management/PhutilAWSS3DeleteManagementWorkflow.php',
     'PhutilAWSS3Future' => 'future/aws/PhutilAWSS3Future.php',
     'PhutilAWSS3GetManagementWorkflow' => 'future/aws/management/PhutilAWSS3GetManagementWorkflow.php',
     'PhutilAWSS3ManagementWorkflow' => 'future/aws/management/PhutilAWSS3ManagementWorkflow.php',
     'PhutilAWSS3PutManagementWorkflow' => 'future/aws/management/PhutilAWSS3PutManagementWorkflow.php',
     'PhutilAWSv4Signature' => 'future/aws/PhutilAWSv4Signature.php',
     'PhutilAWSv4SignatureTestCase' => 'future/aws/__tests__/PhutilAWSv4SignatureTestCase.php',
     'PhutilAggregateException' => 'error/PhutilAggregateException.php',
     'PhutilAllCapsEnglishLocale' => 'internationalization/locales/PhutilAllCapsEnglishLocale.php',
     'PhutilArgumentParser' => 'parser/argument/PhutilArgumentParser.php',
     'PhutilArgumentParserException' => 'parser/argument/exception/PhutilArgumentParserException.php',
     'PhutilArgumentParserTestCase' => 'parser/argument/__tests__/PhutilArgumentParserTestCase.php',
     'PhutilArgumentSpecification' => 'parser/argument/PhutilArgumentSpecification.php',
     'PhutilArgumentSpecificationException' => 'parser/argument/exception/PhutilArgumentSpecificationException.php',
     'PhutilArgumentSpecificationTestCase' => 'parser/argument/__tests__/PhutilArgumentSpecificationTestCase.php',
     'PhutilArgumentSpellingCorrector' => 'parser/argument/PhutilArgumentSpellingCorrector.php',
     'PhutilArgumentSpellingCorrectorTestCase' => 'parser/argument/__tests__/PhutilArgumentSpellingCorrectorTestCase.php',
     'PhutilArgumentUsageException' => 'parser/argument/exception/PhutilArgumentUsageException.php',
     'PhutilArgumentWorkflow' => 'parser/argument/workflow/PhutilArgumentWorkflow.php',
     'PhutilArray' => 'utils/PhutilArray.php',
     'PhutilArrayTestCase' => 'utils/__tests__/PhutilArrayTestCase.php',
     'PhutilArrayWithDefaultValue' => 'utils/PhutilArrayWithDefaultValue.php',
     'PhutilAsanaFuture' => 'future/asana/PhutilAsanaFuture.php',
     'PhutilBacktraceSignalHandler' => 'future/exec/PhutilBacktraceSignalHandler.php',
     'PhutilBallOfPHP' => 'phage/util/PhutilBallOfPHP.php',
     'PhutilBinaryAnalyzer' => 'filesystem/binary/PhutilBinaryAnalyzer.php',
     'PhutilBinaryAnalyzerTestCase' => 'filesystem/binary/__tests__/PhutilBinaryAnalyzerTestCase.php',
     'PhutilBootloader' => 'init/lib/PhutilBootloader.php',
     'PhutilBootloaderException' => 'init/lib/PhutilBootloaderException.php',
     'PhutilBritishEnglishLocale' => 'internationalization/locales/PhutilBritishEnglishLocale.php',
     'PhutilBufferedIterator' => 'utils/PhutilBufferedIterator.php',
     'PhutilBufferedIteratorTestCase' => 'utils/__tests__/PhutilBufferedIteratorTestCase.php',
     'PhutilBugtraqParser' => 'parser/PhutilBugtraqParser.php',
     'PhutilBugtraqParserTestCase' => 'parser/__tests__/PhutilBugtraqParserTestCase.php',
     'PhutilCIDRBlock' => 'ip/PhutilCIDRBlock.php',
     'PhutilCIDRList' => 'ip/PhutilCIDRList.php',
     'PhutilCallbackFilterIterator' => 'utils/PhutilCallbackFilterIterator.php',
     'PhutilCallbackSignalHandler' => 'future/exec/PhutilCallbackSignalHandler.php',
     'PhutilChannel' => 'channel/PhutilChannel.php',
     'PhutilChannelChannel' => 'channel/PhutilChannelChannel.php',
     'PhutilChannelTestCase' => 'channel/__tests__/PhutilChannelTestCase.php',
     'PhutilChunkedIterator' => 'utils/PhutilChunkedIterator.php',
     'PhutilChunkedIteratorTestCase' => 'utils/__tests__/PhutilChunkedIteratorTestCase.php',
     'PhutilClassMapQuery' => 'symbols/PhutilClassMapQuery.php',
     'PhutilCloudWatchMetric' => 'future/aws/PhutilCloudWatchMetric.php',
     'PhutilCommandString' => 'xsprintf/PhutilCommandString.php',
     'PhutilConsole' => 'console/PhutilConsole.php',
     'PhutilConsoleBlock' => 'console/view/PhutilConsoleBlock.php',
     'PhutilConsoleError' => 'console/view/PhutilConsoleError.php',
     'PhutilConsoleFormatter' => 'console/PhutilConsoleFormatter.php',
     'PhutilConsoleInfo' => 'console/view/PhutilConsoleInfo.php',
     'PhutilConsoleList' => 'console/view/PhutilConsoleList.php',
     'PhutilConsoleLogLine' => 'console/view/PhutilConsoleLogLine.php',
     'PhutilConsoleMessage' => 'console/PhutilConsoleMessage.php',
     'PhutilConsoleMetrics' => 'console/PhutilConsoleMetrics.php',
     'PhutilConsoleMetricsSignalHandler' => 'future/exec/PhutilConsoleMetricsSignalHandler.php',
     'PhutilConsoleProgressBar' => 'console/PhutilConsoleProgressBar.php',
     'PhutilConsoleProgressSink' => 'progress/PhutilConsoleProgressSink.php',
     'PhutilConsoleServer' => 'console/PhutilConsoleServer.php',
     'PhutilConsoleServerChannel' => 'console/PhutilConsoleServerChannel.php',
     'PhutilConsoleSkip' => 'console/view/PhutilConsoleSkip.php',
     'PhutilConsoleStdinNotInteractiveException' => 'console/PhutilConsoleStdinNotInteractiveException.php',
     'PhutilConsoleTable' => 'console/view/PhutilConsoleTable.php',
     'PhutilConsoleView' => 'console/view/PhutilConsoleView.php',
     'PhutilConsoleWarning' => 'console/view/PhutilConsoleWarning.php',
     'PhutilConsoleWrapTestCase' => 'console/__tests__/PhutilConsoleWrapTestCase.php',
     'PhutilCowsay' => 'utils/PhutilCowsay.php',
     'PhutilCowsayTestCase' => 'utils/__tests__/PhutilCowsayTestCase.php',
     'PhutilCsprintfTestCase' => 'xsprintf/__tests__/PhutilCsprintfTestCase.php',
     'PhutilCzechLocale' => 'internationalization/locales/PhutilCzechLocale.php',
     'PhutilDOMNode' => 'parser/html/PhutilDOMNode.php',
     'PhutilDeferredLog' => 'filesystem/PhutilDeferredLog.php',
     'PhutilDeferredLogTestCase' => 'filesystem/__tests__/PhutilDeferredLogTestCase.php',
     'PhutilDiffBinaryAnalyzer' => 'filesystem/binary/PhutilDiffBinaryAnalyzer.php',
     'PhutilDirectedScalarGraph' => 'utils/PhutilDirectedScalarGraph.php',
     'PhutilDirectoryFixture' => 'filesystem/PhutilDirectoryFixture.php',
     'PhutilDocblockParser' => 'parser/PhutilDocblockParser.php',
     'PhutilDocblockParserTestCase' => 'parser/__tests__/PhutilDocblockParserTestCase.php',
     'PhutilEditDistanceMatrix' => 'utils/PhutilEditDistanceMatrix.php',
     'PhutilEditDistanceMatrixTestCase' => 'utils/__tests__/PhutilEditDistanceMatrixTestCase.php',
     'PhutilEditorConfig' => 'parser/PhutilEditorConfig.php',
     'PhutilEditorConfigTestCase' => 'parser/__tests__/PhutilEditorConfigTestCase.php',
     'PhutilEmailAddress' => 'parser/PhutilEmailAddress.php',
     'PhutilEmailAddressTestCase' => 'parser/__tests__/PhutilEmailAddressTestCase.php',
     'PhutilEmojiLocale' => 'internationalization/locales/PhutilEmojiLocale.php',
     'PhutilEnglishCanadaLocale' => 'internationalization/locales/PhutilEnglishCanadaLocale.php',
     'PhutilErrorHandler' => 'error/PhutilErrorHandler.php',
     'PhutilErrorHandlerTestCase' => 'error/__tests__/PhutilErrorHandlerTestCase.php',
     'PhutilErrorTrap' => 'error/PhutilErrorTrap.php',
     'PhutilEvent' => 'events/PhutilEvent.php',
     'PhutilEventConstants' => 'events/constant/PhutilEventConstants.php',
     'PhutilEventEngine' => 'events/PhutilEventEngine.php',
     'PhutilEventListener' => 'events/PhutilEventListener.php',
     'PhutilEventType' => 'events/constant/PhutilEventType.php',
     'PhutilExampleBufferedIterator' => 'utils/PhutilExampleBufferedIterator.php',
     'PhutilExecChannel' => 'channel/PhutilExecChannel.php',
     'PhutilExecPassthru' => 'future/exec/PhutilExecPassthru.php',
     'PhutilExecutableFuture' => 'future/exec/PhutilExecutableFuture.php',
     'PhutilExecutionEnvironment' => 'utils/PhutilExecutionEnvironment.php',
     'PhutilFileLock' => 'filesystem/PhutilFileLock.php',
     'PhutilFileLockTestCase' => 'filesystem/__tests__/PhutilFileLockTestCase.php',
     'PhutilFileTree' => 'filesystem/PhutilFileTree.php',
     'PhutilFrenchLocale' => 'internationalization/locales/PhutilFrenchLocale.php',
     'PhutilGermanLocale' => 'internationalization/locales/PhutilGermanLocale.php',
     'PhutilGitBinaryAnalyzer' => 'filesystem/binary/PhutilGitBinaryAnalyzer.php',
     'PhutilGitHubFuture' => 'future/github/PhutilGitHubFuture.php',
     'PhutilGitHubResponse' => 'future/github/PhutilGitHubResponse.php',
     'PhutilGitURI' => 'parser/PhutilGitURI.php',
     'PhutilGitURITestCase' => 'parser/__tests__/PhutilGitURITestCase.php',
     'PhutilHTMLParser' => 'parser/html/PhutilHTMLParser.php',
     'PhutilHTMLParserTestCase' => 'parser/html/__tests__/PhutilHTMLParserTestCase.php',
     'PhutilHTTPEngineExtension' => 'future/http/PhutilHTTPEngineExtension.php',
     'PhutilHTTPResponse' => 'parser/http/PhutilHTTPResponse.php',
     'PhutilHTTPResponseParser' => 'parser/http/PhutilHTTPResponseParser.php',
     'PhutilHTTPResponseParserTestCase' => 'parser/http/__tests__/PhutilHTTPResponseParserTestCase.php',
     'PhutilHashingIterator' => 'utils/PhutilHashingIterator.php',
     'PhutilHashingIteratorTestCase' => 'utils/__tests__/PhutilHashingIteratorTestCase.php',
     'PhutilHelpArgumentWorkflow' => 'parser/argument/workflow/PhutilHelpArgumentWorkflow.php',
     'PhutilHgsprintfTestCase' => 'xsprintf/__tests__/PhutilHgsprintfTestCase.php',
     'PhutilINIParserException' => 'parser/exception/PhutilINIParserException.php',
     'PhutilIPAddress' => 'ip/PhutilIPAddress.php',
     'PhutilIPAddressTestCase' => 'ip/__tests__/PhutilIPAddressTestCase.php',
     'PhutilIPv4Address' => 'ip/PhutilIPv4Address.php',
     'PhutilIPv6Address' => 'ip/PhutilIPv6Address.php',
     'PhutilInteractiveEditor' => 'console/PhutilInteractiveEditor.php',
     'PhutilInvalidRuleParserGeneratorException' => 'parser/generator/exception/PhutilInvalidRuleParserGeneratorException.php',
     'PhutilInvalidStateException' => 'exception/PhutilInvalidStateException.php',
     'PhutilInvalidStateExceptionTestCase' => 'exception/__tests__/PhutilInvalidStateExceptionTestCase.php',
     'PhutilIrreducibleRuleParserGeneratorException' => 'parser/generator/exception/PhutilIrreducibleRuleParserGeneratorException.php',
     'PhutilJSON' => 'parser/PhutilJSON.php',
     'PhutilJSONFragmentLexer' => 'lexer/PhutilJSONFragmentLexer.php',
     'PhutilJSONParser' => 'parser/PhutilJSONParser.php',
     'PhutilJSONParserException' => 'parser/exception/PhutilJSONParserException.php',
     'PhutilJSONParserTestCase' => 'parser/__tests__/PhutilJSONParserTestCase.php',
     'PhutilJSONProtocolChannel' => 'channel/PhutilJSONProtocolChannel.php',
     'PhutilJSONProtocolChannelTestCase' => 'channel/__tests__/PhutilJSONProtocolChannelTestCase.php',
     'PhutilJSONTestCase' => 'parser/__tests__/PhutilJSONTestCase.php',
     'PhutilJavaFragmentLexer' => 'lexer/PhutilJavaFragmentLexer.php',
     'PhutilKoreanLocale' => 'internationalization/locales/PhutilKoreanLocale.php',
     'PhutilLanguageGuesser' => 'parser/PhutilLanguageGuesser.php',
     'PhutilLanguageGuesserTestCase' => 'parser/__tests__/PhutilLanguageGuesserTestCase.php',
     'PhutilLexer' => 'lexer/PhutilLexer.php',
     'PhutilLibraryConflictException' => 'init/lib/PhutilLibraryConflictException.php',
     'PhutilLibraryMapBuilder' => 'moduleutils/PhutilLibraryMapBuilder.php',
     'PhutilLibraryTestCase' => '__tests__/PhutilLibraryTestCase.php',
     'PhutilLocale' => 'internationalization/PhutilLocale.php',
     'PhutilLocaleTestCase' => 'internationalization/__tests__/PhutilLocaleTestCase.php',
     'PhutilLock' => 'filesystem/PhutilLock.php',
     'PhutilLockException' => 'filesystem/PhutilLockException.php',
     'PhutilLogFileChannel' => 'channel/PhutilLogFileChannel.php',
     'PhutilLunarPhase' => 'utils/PhutilLunarPhase.php',
     'PhutilLunarPhaseTestCase' => 'utils/__tests__/PhutilLunarPhaseTestCase.php',
     'PhutilMercurialBinaryAnalyzer' => 'filesystem/binary/PhutilMercurialBinaryAnalyzer.php',
     'PhutilMethodNotImplementedException' => 'error/PhutilMethodNotImplementedException.php',
     'PhutilMetricsChannel' => 'channel/PhutilMetricsChannel.php',
     'PhutilMissingSymbolException' => 'init/lib/PhutilMissingSymbolException.php',
     'PhutilModuleUtilsTestCase' => 'init/lib/__tests__/PhutilModuleUtilsTestCase.php',
     'PhutilNumber' => 'internationalization/PhutilNumber.php',
     'PhutilOAuth1Future' => 'future/oauth/PhutilOAuth1Future.php',
     'PhutilOAuth1FutureTestCase' => 'future/oauth/__tests__/PhutilOAuth1FutureTestCase.php',
     'PhutilOpaqueEnvelope' => 'error/PhutilOpaqueEnvelope.php',
     'PhutilOpaqueEnvelopeKey' => 'error/PhutilOpaqueEnvelopeKey.php',
     'PhutilOpaqueEnvelopeTestCase' => 'error/__tests__/PhutilOpaqueEnvelopeTestCase.php',
     'PhutilPHPFragmentLexer' => 'lexer/PhutilPHPFragmentLexer.php',
     'PhutilPHPFragmentLexerTestCase' => 'lexer/__tests__/PhutilPHPFragmentLexerTestCase.php',
     'PhutilPHPObjectProtocolChannel' => 'channel/PhutilPHPObjectProtocolChannel.php',
     'PhutilPHPObjectProtocolChannelTestCase' => 'channel/__tests__/PhutilPHPObjectProtocolChannelTestCase.php',
     'PhutilParserGenerator' => 'parser/PhutilParserGenerator.php',
     'PhutilParserGeneratorException' => 'parser/generator/exception/PhutilParserGeneratorException.php',
     'PhutilParserGeneratorTestCase' => 'parser/__tests__/PhutilParserGeneratorTestCase.php',
     'PhutilPayPalAPIFuture' => 'future/paypal/PhutilPayPalAPIFuture.php',
     'PhutilPerson' => 'internationalization/PhutilPerson.php',
     'PhutilPersonTest' => 'internationalization/__tests__/PhutilPersonTest.php',
     'PhutilPhtTestCase' => 'internationalization/__tests__/PhutilPhtTestCase.php',
     'PhutilPirateEnglishLocale' => 'internationalization/locales/PhutilPirateEnglishLocale.php',
     'PhutilPortugueseBrazilLocale' => 'internationalization/locales/PhutilPortugueseBrazilLocale.php',
     'PhutilPortuguesePortugalLocale' => 'internationalization/locales/PhutilPortuguesePortugalLocale.php',
     'PhutilPostmarkFuture' => 'future/postmark/PhutilPostmarkFuture.php',
     'PhutilPregsprintfTestCase' => 'xsprintf/__tests__/PhutilPregsprintfTestCase.php',
     'PhutilProcessQuery' => 'filesystem/PhutilProcessQuery.php',
     'PhutilProcessRef' => 'filesystem/PhutilProcessRef.php',
     'PhutilProcessRefTestCase' => 'filesystem/__tests__/PhutilProcessRefTestCase.php',
     'PhutilProgressSink' => 'progress/PhutilProgressSink.php',
     'PhutilProtocolChannel' => 'channel/PhutilProtocolChannel.php',
     'PhutilProxyException' => 'error/PhutilProxyException.php',
     'PhutilProxyIterator' => 'utils/PhutilProxyIterator.php',
     'PhutilPygmentizeBinaryAnalyzer' => 'filesystem/binary/PhutilPygmentizeBinaryAnalyzer.php',
     'PhutilPythonFragmentLexer' => 'lexer/PhutilPythonFragmentLexer.php',
     'PhutilQueryStringParser' => 'parser/PhutilQueryStringParser.php',
     'PhutilQueryStringParserTestCase' => 'parser/__tests__/PhutilQueryStringParserTestCase.php',
     'PhutilRawEnglishLocale' => 'internationalization/locales/PhutilRawEnglishLocale.php',
     'PhutilReadableSerializer' => 'readableserializer/PhutilReadableSerializer.php',
     'PhutilReadableSerializerTestCase' => 'readableserializer/__tests__/PhutilReadableSerializerTestCase.php',
     'PhutilRope' => 'utils/PhutilRope.php',
     'PhutilRopeTestCase' => 'utils/__tests__/PhutilRopeTestCase.php',
     'PhutilServiceProfiler' => 'serviceprofiler/PhutilServiceProfiler.php',
     'PhutilShellLexer' => 'lexer/PhutilShellLexer.php',
     'PhutilShellLexerTestCase' => 'lexer/__tests__/PhutilShellLexerTestCase.php',
     'PhutilSignalHandler' => 'future/exec/PhutilSignalHandler.php',
     'PhutilSignalRouter' => 'future/exec/PhutilSignalRouter.php',
     'PhutilSimpleOptions' => 'parser/PhutilSimpleOptions.php',
     'PhutilSimpleOptionsLexer' => 'lexer/PhutilSimpleOptionsLexer.php',
     'PhutilSimpleOptionsLexerTestCase' => 'lexer/__tests__/PhutilSimpleOptionsLexerTestCase.php',
     'PhutilSimpleOptionsTestCase' => 'parser/__tests__/PhutilSimpleOptionsTestCase.php',
     'PhutilSimplifiedChineseLocale' => 'internationalization/locales/PhutilSimplifiedChineseLocale.php',
     'PhutilSlackFuture' => 'future/slack/PhutilSlackFuture.php',
     'PhutilSocketChannel' => 'channel/PhutilSocketChannel.php',
     'PhutilSortVector' => 'utils/PhutilSortVector.php',
     'PhutilSpanishSpainLocale' => 'internationalization/locales/PhutilSpanishSpainLocale.php',
     'PhutilStreamIterator' => 'utils/PhutilStreamIterator.php',
     'PhutilSubversionBinaryAnalyzer' => 'filesystem/binary/PhutilSubversionBinaryAnalyzer.php',
     'PhutilSymbolLoader' => 'symbols/PhutilSymbolLoader.php',
     'PhutilSystem' => 'utils/PhutilSystem.php',
     'PhutilSystemTestCase' => 'utils/__tests__/PhutilSystemTestCase.php',
     'PhutilTerminalString' => 'xsprintf/PhutilTerminalString.php',
     'PhutilTestCase' => 'unit/engine/phutil/PhutilTestCase.php',
     'PhutilTestCaseTestCase' => 'unit/engine/phutil/testcase/PhutilTestCaseTestCase.php',
     'PhutilTestPhobject' => 'object/__tests__/PhutilTestPhobject.php',
     'PhutilTestSkippedException' => 'unit/engine/phutil/testcase/PhutilTestSkippedException.php',
     'PhutilTestTerminatedException' => 'unit/engine/phutil/testcase/PhutilTestTerminatedException.php',
     'PhutilTraditionalChineseLocale' => 'internationalization/locales/PhutilTraditionalChineseLocale.php',
     'PhutilTranslation' => 'internationalization/PhutilTranslation.php',
     'PhutilTranslationTestCase' => 'internationalization/__tests__/PhutilTranslationTestCase.php',
     'PhutilTranslator' => 'internationalization/PhutilTranslator.php',
     'PhutilTranslatorTestCase' => 'internationalization/__tests__/PhutilTranslatorTestCase.php',
     'PhutilTsprintfTestCase' => 'xsprintf/__tests__/PhutilTsprintfTestCase.php',
     'PhutilTwitchFuture' => 'future/twitch/PhutilTwitchFuture.php',
     'PhutilTypeCheckException' => 'parser/exception/PhutilTypeCheckException.php',
     'PhutilTypeExtraParametersException' => 'parser/exception/PhutilTypeExtraParametersException.php',
     'PhutilTypeLexer' => 'lexer/PhutilTypeLexer.php',
     'PhutilTypeMissingParametersException' => 'parser/exception/PhutilTypeMissingParametersException.php',
     'PhutilTypeSpec' => 'parser/PhutilTypeSpec.php',
     'PhutilTypeSpecTestCase' => 'parser/__tests__/PhutilTypeSpecTestCase.php',
     'PhutilURI' => 'parser/PhutilURI.php',
     'PhutilURITestCase' => 'parser/__tests__/PhutilURITestCase.php',
     'PhutilUSEnglishLocale' => 'internationalization/locales/PhutilUSEnglishLocale.php',
     'PhutilUTF8StringTruncator' => 'utils/PhutilUTF8StringTruncator.php',
     'PhutilUTF8TestCase' => 'utils/__tests__/PhutilUTF8TestCase.php',
     'PhutilUnitTestEngine' => 'unit/engine/PhutilUnitTestEngine.php',
     'PhutilUnitTestEngineTestCase' => 'unit/engine/__tests__/PhutilUnitTestEngineTestCase.php',
     'PhutilUnknownSymbolParserGeneratorException' => 'parser/generator/exception/PhutilUnknownSymbolParserGeneratorException.php',
     'PhutilUnreachableRuleParserGeneratorException' => 'parser/generator/exception/PhutilUnreachableRuleParserGeneratorException.php',
     'PhutilUnreachableTerminalParserGeneratorException' => 'parser/generator/exception/PhutilUnreachableTerminalParserGeneratorException.php',
     'PhutilUrisprintfTestCase' => 'xsprintf/__tests__/PhutilUrisprintfTestCase.php',
     'PhutilUtilsTestCase' => 'utils/__tests__/PhutilUtilsTestCase.php',
     'PhutilVeryWowEnglishLocale' => 'internationalization/locales/PhutilVeryWowEnglishLocale.php',
     'PhutilWordPressFuture' => 'future/wordpress/PhutilWordPressFuture.php',
     'PhutilXHPASTBinary' => 'parser/xhpast/bin/PhutilXHPASTBinary.php',
     'PytestTestEngine' => 'unit/engine/PytestTestEngine.php',
     'TempFile' => 'filesystem/TempFile.php',
     'TestAbstractDirectedGraph' => 'utils/__tests__/TestAbstractDirectedGraph.php',
     'XHPASTNode' => 'parser/xhpast/api/XHPASTNode.php',
     'XHPASTNodeTestCase' => 'parser/xhpast/api/__tests__/XHPASTNodeTestCase.php',
     'XHPASTSyntaxErrorException' => 'parser/xhpast/api/XHPASTSyntaxErrorException.php',
     'XHPASTToken' => 'parser/xhpast/api/XHPASTToken.php',
     'XHPASTTree' => 'parser/xhpast/api/XHPASTTree.php',
     'XHPASTTreeTestCase' => 'parser/xhpast/api/__tests__/XHPASTTreeTestCase.php',
     'XUnitTestEngine' => 'unit/engine/XUnitTestEngine.php',
     'XUnitTestResultParserTestCase' => 'unit/parser/__tests__/XUnitTestResultParserTestCase.php',
     'XsprintfUnknownConversionException' => 'xsprintf/exception/XsprintfUnknownConversionException.php',
   ),
   'function' => array(
     '__phutil_autoload' => 'init/init-library.php',
     'array_fuse' => 'utils/utils.php',
     'array_interleave' => 'utils/utils.php',
     'array_mergev' => 'utils/utils.php',
     'array_select_keys' => 'utils/utils.php',
     'assert_instances_of' => 'utils/utils.php',
     'assert_same_keys' => 'utils/utils.php',
     'assert_stringlike' => 'utils/utils.php',
     'coalesce' => 'utils/utils.php',
     'csprintf' => 'xsprintf/csprintf.php',
     'exec_manual' => 'future/exec/execx.php',
     'execx' => 'future/exec/execx.php',
     'head' => 'utils/utils.php',
     'head_key' => 'utils/utils.php',
     'hgsprintf' => 'xsprintf/hgsprintf.php',
     'id' => 'utils/utils.php',
     'idx' => 'utils/utils.php',
     'idxv' => 'utils/utils.php',
     'ifilter' => 'utils/utils.php',
     'igroup' => 'utils/utils.php',
     'ipull' => 'utils/utils.php',
     'isort' => 'utils/utils.php',
     'jsprintf' => 'xsprintf/jsprintf.php',
     'last' => 'utils/utils.php',
     'last_key' => 'utils/utils.php',
     'ldap_sprintf' => 'xsprintf/ldapsprintf.php',
     'mfilter' => 'utils/utils.php',
     'mgroup' => 'utils/utils.php',
     'mpull' => 'utils/utils.php',
     'msort' => 'utils/utils.php',
     'msortv' => 'utils/utils.php',
     'newv' => 'utils/utils.php',
     'nonempty' => 'utils/utils.php',
     'phlog' => 'error/phlog.php',
     'pht' => 'internationalization/pht.php',
     'phutil_build_http_querystring' => 'utils/utils.php',
     'phutil_build_http_querystring_from_pairs' => 'utils/utils.php',
     'phutil_censor_credentials' => 'utils/utils.php',
     'phutil_console_confirm' => 'console/format.php',
     'phutil_console_format' => 'console/format.php',
     'phutil_console_get_terminal_width' => 'console/format.php',
     'phutil_console_prompt' => 'console/format.php',
     'phutil_console_require_tty' => 'console/format.php',
     'phutil_console_select' => 'console/format.php',
     'phutil_console_wrap' => 'console/format.php',
     'phutil_count' => 'internationalization/pht.php',
     'phutil_date_format' => 'utils/viewutils.php',
     'phutil_decode_mime_header' => 'utils/utils.php',
     'phutil_deprecated' => 'init/lib/moduleutils.php',
     'phutil_describe_type' => 'utils/utils.php',
     'phutil_error_listener_example' => 'error/phlog.php',
     'phutil_escape_uri' => 'utils/utils.php',
     'phutil_escape_uri_path_component' => 'utils/utils.php',
     'phutil_fnmatch' => 'utils/utils.php',
     'phutil_format_bytes' => 'utils/viewutils.php',
     'phutil_format_relative_time' => 'utils/viewutils.php',
     'phutil_format_relative_time_detailed' => 'utils/viewutils.php',
     'phutil_format_units_generic' => 'utils/viewutils.php',
     'phutil_fwrite_nonblocking_stream' => 'utils/utils.php',
     'phutil_get_current_library_name' => 'init/lib/moduleutils.php',
     'phutil_get_library_name_for_root' => 'init/lib/moduleutils.php',
     'phutil_get_library_root' => 'init/lib/moduleutils.php',
     'phutil_get_library_root_for_path' => 'init/lib/moduleutils.php',
     'phutil_get_signal_name' => 'future/exec/execx.php',
     'phutil_get_system_locale' => 'utils/utf8.php',
     'phutil_hashes_are_identical' => 'utils/utils.php',
     'phutil_http_parameter_pair' => 'utils/utils.php',
     'phutil_ini_decode' => 'utils/utils.php',
     'phutil_is_hiphop_runtime' => 'utils/utils.php',
     'phutil_is_natural_list' => 'utils/utils.php',
     'phutil_is_system_locale_available' => 'utils/utf8.php',
     'phutil_is_utf8' => 'utils/utf8.php',
     'phutil_is_utf8_slowly' => 'utils/utf8.php',
     'phutil_is_utf8_with_only_bmp_characters' => 'utils/utf8.php',
     'phutil_is_windows' => 'utils/utils.php',
     'phutil_json_decode' => 'utils/utils.php',
     'phutil_json_encode' => 'utils/utils.php',
     'phutil_load_library' => 'init/lib/moduleutils.php',
     'phutil_loggable_string' => 'utils/utils.php',
     'phutil_microseconds_since' => 'utils/utils.php',
     'phutil_parse_bytes' => 'utils/viewutils.php',
     'phutil_passthru' => 'future/exec/execx.php',
     'phutil_person' => 'internationalization/pht.php',
     'phutil_register_library' => 'init/lib/core.php',
     'phutil_register_library_map' => 'init/lib/core.php',
     'phutil_set_system_locale' => 'utils/utf8.php',
     'phutil_split_lines' => 'utils/utils.php',
     'phutil_string_cast' => 'utils/utils.php',
     'phutil_unescape_uri_path_component' => 'utils/utils.php',
     'phutil_units' => 'utils/utils.php',
     'phutil_utf8_console_strlen' => 'utils/utf8.php',
     'phutil_utf8_convert' => 'utils/utf8.php',
     'phutil_utf8_encode_codepoint' => 'utils/utf8.php',
     'phutil_utf8_hard_wrap' => 'utils/utf8.php',
     'phutil_utf8_hard_wrap_html' => 'utils/utf8.php',
     'phutil_utf8_is_cjk' => 'utils/utf8.php',
     'phutil_utf8_is_combining_character' => 'utils/utf8.php',
     'phutil_utf8_strlen' => 'utils/utf8.php',
     'phutil_utf8_strtolower' => 'utils/utf8.php',
     'phutil_utf8_strtoupper' => 'utils/utf8.php',
     'phutil_utf8_strtr' => 'utils/utf8.php',
     'phutil_utf8_ucwords' => 'utils/utf8.php',
     'phutil_utf8ize' => 'utils/utf8.php',
     'phutil_utf8v' => 'utils/utf8.php',
     'phutil_utf8v_codepoints' => 'utils/utf8.php',
     'phutil_utf8v_combine_characters' => 'utils/utf8.php',
     'phutil_utf8v_combined' => 'utils/utf8.php',
     'phutil_validate_json' => 'utils/utils.php',
     'phutil_var_export' => 'utils/utils.php',
     'ppull' => 'utils/utils.php',
     'pregsprintf' => 'xsprintf/pregsprintf.php',
     'tsprintf' => 'xsprintf/tsprintf.php',
     'urisprintf' => 'xsprintf/urisprintf.php',
     'vcsprintf' => 'xsprintf/csprintf.php',
     'vjsprintf' => 'xsprintf/jsprintf.php',
     'vurisprintf' => 'xsprintf/urisprintf.php',
     'xhp_parser_node_constants' => 'parser/xhpast/parser_nodes.php',
     'xhpast_parser_token_constants' => 'parser/xhpast/parser_tokens.php',
     'xsprintf' => 'xsprintf/xsprintf.php',
     'xsprintf_callback_example' => 'xsprintf/xsprintf.php',
     'xsprintf_command' => 'xsprintf/csprintf.php',
     'xsprintf_javascript' => 'xsprintf/jsprintf.php',
     'xsprintf_ldap' => 'xsprintf/ldapsprintf.php',
     'xsprintf_mercurial' => 'xsprintf/hgsprintf.php',
     'xsprintf_regex' => 'xsprintf/pregsprintf.php',
     'xsprintf_terminal' => 'xsprintf/tsprintf.php',
     'xsprintf_uri' => 'xsprintf/urisprintf.php',
   ),
   'xmap' => array(
     'AASTNode' => 'Phobject',
     'AASTNodeList' => array(
       'Phobject',
       'Countable',
       'Iterator',
     ),
     'AASTToken' => 'Phobject',
     'AASTTree' => 'Phobject',
     'AbstractDirectedGraph' => 'Phobject',
     'AbstractDirectedGraphTestCase' => 'PhutilTestCase',
     'ArcanistAbstractMethodBodyXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistAbstractMethodBodyXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistAbstractPrivateMethodXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistAbstractPrivateMethodXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
+    'ArcanistAlias' => 'Phobject',
+    'ArcanistAliasEffect' => 'Phobject',
+    'ArcanistAliasEngine' => 'Phobject',
     'ArcanistAliasFunctionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistAliasFunctionXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistAliasWorkflow' => 'ArcanistWorkflow',
+    'ArcanistAliasesConfigOption' => 'ArcanistListConfigOption',
     'ArcanistAmendWorkflow' => 'ArcanistWorkflow',
     'ArcanistAnoidWorkflow' => 'ArcanistWorkflow',
+    'ArcanistArcConfigurationEngineExtension' => 'ArcanistConfigurationEngineExtension',
+    'ArcanistArcToolset' => 'ArcanistToolset',
     'ArcanistArrayCombineXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistArrayCombineXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistArrayIndexSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistArrayIndexSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistArraySeparatorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistArraySeparatorXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistArrayValueXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistArrayValueXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistBackoutWorkflow' => 'ArcanistWorkflow',
     'ArcanistBaseCommitParser' => 'Phobject',
     'ArcanistBaseCommitParserTestCase' => 'PhutilTestCase',
     'ArcanistBaseXHPASTLinter' => 'ArcanistFutureLinter',
     'ArcanistBinaryExpressionSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistBinaryExpressionSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistBinaryNumericScalarCasingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistBinaryNumericScalarCasingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistBlacklistedFunctionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistBlacklistedFunctionXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistBlindlyTrustHTTPEngineExtension' => 'PhutilHTTPEngineExtension',
     'ArcanistBookmarkWorkflow' => 'ArcanistFeatureWorkflow',
     'ArcanistBraceFormattingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistBraceFormattingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistBranchRef' => 'ArcanistRef',
     'ArcanistBranchWorkflow' => 'ArcanistFeatureWorkflow',
     'ArcanistBrowseCommitHardpointLoader' => 'ArcanistHardpointLoader',
     'ArcanistBrowseCommitURIHardpointLoader' => 'ArcanistBrowseURIHardpointLoader',
     'ArcanistBrowseObjectNameURIHardpointLoader' => 'ArcanistBrowseURIHardpointLoader',
     'ArcanistBrowsePathURIHardpointLoader' => 'ArcanistBrowseURIHardpointLoader',
     'ArcanistBrowseRef' => 'ArcanistRef',
     'ArcanistBrowseRevisionURIHardpointLoader' => 'ArcanistBrowseURIHardpointLoader',
     'ArcanistBrowseURIHardpointLoader' => 'ArcanistHardpointLoader',
     'ArcanistBrowseURIRef' => 'ArcanistRef',
     'ArcanistBrowseWorkflow' => 'ArcanistWorkflow',
     'ArcanistBuildPlanRef' => 'Phobject',
     'ArcanistBuildRef' => 'Phobject',
     'ArcanistBundle' => 'Phobject',
     'ArcanistBundleTestCase' => 'PhutilTestCase',
     'ArcanistCSSLintLinter' => 'ArcanistExternalLinter',
     'ArcanistCSSLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistCSharpLinter' => 'ArcanistLinter',
     'ArcanistCallConduitWorkflow' => 'ArcanistWorkflow',
     'ArcanistCallParenthesesXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistCallParenthesesXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistCallTimePassByReferenceXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistCallTimePassByReferenceXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistCapabilityNotSupportedException' => 'Exception',
     'ArcanistCastSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistCastSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistCheckstyleXMLLintRenderer' => 'ArcanistLintRenderer',
     'ArcanistChmodLinter' => 'ArcanistLinter',
     'ArcanistChmodLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistClassExtendsObjectXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistClassExtendsObjectXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistClassFilenameMismatchXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistClassMustBeDeclaredAbstractXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistClassMustBeDeclaredAbstractXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistClassNameLiteralXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistClassNameLiteralXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistCloseRevisionWorkflow' => 'ArcanistWorkflow',
     'ArcanistCloseWorkflow' => 'ArcanistWorkflow',
     'ArcanistClosureLinter' => 'ArcanistExternalLinter',
     'ArcanistClosureLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistCoffeeLintLinter' => 'ArcanistExternalLinter',
     'ArcanistCoffeeLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistCommentRemover' => 'Phobject',
     'ArcanistCommentRemoverTestCase' => 'PhutilTestCase',
     'ArcanistCommentSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistCommentStyleXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistCommentStyleXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistCommitRef' => 'ArcanistRef',
     'ArcanistCommitUpstreamHardpointLoader' => 'ArcanistHardpointLoader',
     'ArcanistCommitWorkflow' => 'ArcanistWorkflow',
     'ArcanistCompilerLintRenderer' => 'ArcanistLintRenderer',
     'ArcanistComposerLinter' => 'ArcanistLinter',
     'ArcanistComprehensiveLintEngine' => 'ArcanistLintEngine',
     'ArcanistConcatenationOperatorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistConcatenationOperatorXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistConduitCall' => 'Phobject',
     'ArcanistConduitEngine' => 'Phobject',
+    'ArcanistConduitException' => 'Exception',
+    'ArcanistConfigOption' => 'Phobject',
     'ArcanistConfiguration' => 'Phobject',
     'ArcanistConfigurationDrivenLintEngine' => 'ArcanistLintEngine',
     'ArcanistConfigurationDrivenUnitTestEngine' => 'ArcanistUnitTestEngine',
+    'ArcanistConfigurationEngine' => 'Phobject',
+    'ArcanistConfigurationEngineExtension' => 'Phobject',
     'ArcanistConfigurationManager' => 'Phobject',
+    'ArcanistConfigurationSource' => 'Phobject',
+    'ArcanistConfigurationSourceList' => 'Phobject',
+    'ArcanistConfigurationSourceValue' => 'Phobject',
     'ArcanistConsoleLintRenderer' => 'ArcanistLintRenderer',
     'ArcanistConsoleLintRendererTestCase' => 'PhutilTestCase',
     'ArcanistConstructorParenthesesXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistConstructorParenthesesXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistContinueInsideSwitchXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistContinueInsideSwitchXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistControlStatementSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistControlStatementSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistCoverWorkflow' => 'ArcanistWorkflow',
     'ArcanistCppcheckLinter' => 'ArcanistExternalLinter',
     'ArcanistCppcheckLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistCpplintLinter' => 'ArcanistExternalLinter',
     'ArcanistCpplintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistCurlyBraceArrayIndexXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistCurlyBraceArrayIndexXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistDeclarationParenthesesXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistDeclarationParenthesesXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistDefaultParametersXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistDefaultParametersXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
+    'ArcanistDefaultsConfigurationSource' => 'ArcanistDictionaryConfigurationSource',
     'ArcanistDeprecationXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistDeprecationXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
+    'ArcanistDictionaryConfigurationSource' => 'ArcanistConfigurationSource',
     'ArcanistDiffByteSizeException' => 'Exception',
     'ArcanistDiffChange' => 'Phobject',
     'ArcanistDiffChangeType' => 'Phobject',
     'ArcanistDiffHunk' => 'Phobject',
     'ArcanistDiffParser' => 'Phobject',
     'ArcanistDiffParserTestCase' => 'PhutilTestCase',
     'ArcanistDiffUtils' => 'Phobject',
     'ArcanistDiffUtilsTestCase' => 'PhutilTestCase',
     'ArcanistDiffWorkflow' => 'ArcanistWorkflow',
     'ArcanistDifferentialCommitMessage' => 'Phobject',
     'ArcanistDifferentialCommitMessageParserException' => 'Exception',
     'ArcanistDifferentialDependencyGraph' => 'AbstractDirectedGraph',
     'ArcanistDifferentialRevisionHash' => 'Phobject',
     'ArcanistDifferentialRevisionStatus' => 'Phobject',
     'ArcanistDoubleQuoteXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistDoubleQuoteXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistDownloadWorkflow' => 'ArcanistWorkflow',
     'ArcanistDuplicateKeysInArrayXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistDuplicateKeysInArrayXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistDuplicateSwitchCaseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistDuplicateSwitchCaseXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistDynamicDefineXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistDynamicDefineXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistElseIfUsageXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistElseIfUsageXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistEmptyFileXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistEmptyStatementXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistEmptyStatementXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistEventType' => 'PhutilEventType',
     'ArcanistExitExpressionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistExitExpressionXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistExportWorkflow' => 'ArcanistWorkflow',
     'ArcanistExternalLinter' => 'ArcanistFutureLinter',
     'ArcanistExternalLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistExtractUseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistExtractUseXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistFeatureWorkflow' => 'ArcanistWorkflow',
+    'ArcanistFileConfigurationSource' => 'ArcanistFilesystemConfigurationSource',
     'ArcanistFileDataRef' => 'Phobject',
     'ArcanistFileUploader' => 'Phobject',
     'ArcanistFilenameLinter' => 'ArcanistLinter',
     'ArcanistFilenameLinterTestCase' => 'ArcanistLinterTestCase',
+    'ArcanistFilesystemConfigurationSource' => 'ArcanistDictionaryConfigurationSource',
     'ArcanistFlagWorkflow' => 'ArcanistWorkflow',
     'ArcanistFlake8Linter' => 'ArcanistExternalLinter',
     'ArcanistFlake8LinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistFormattedStringXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistFormattedStringXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistFunctionCallShouldBeTypeCastXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistFutureLinter' => 'ArcanistLinter',
     'ArcanistGeneratedLinter' => 'ArcanistLinter',
     'ArcanistGeneratedLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistGetConfigWorkflow' => 'ArcanistWorkflow',
     'ArcanistGitAPI' => 'ArcanistRepositoryAPI',
     'ArcanistGitCommitMessageHardpointLoader' => 'ArcanistGitHardpointLoader',
     'ArcanistGitHardpointLoader' => 'ArcanistHardpointLoader',
     'ArcanistGitLandEngine' => 'ArcanistLandEngine',
     'ArcanistGitRevisionHardpointLoader' => 'ArcanistGitHardpointLoader',
     'ArcanistGitUpstreamPath' => 'Phobject',
+    'ArcanistGitWorkingCopy' => 'ArcanistWorkingCopy',
     'ArcanistGlobalVariableXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistGlobalVariableXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistGoLintLinter' => 'ArcanistExternalLinter',
     'ArcanistGoLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistGoTestResultParser' => 'ArcanistTestResultParser',
     'ArcanistGoTestResultParserTestCase' => 'PhutilTestCase',
     'ArcanistHLintLinter' => 'ArcanistExternalLinter',
     'ArcanistHLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistHardpointLoader' => 'Phobject',
     'ArcanistHelpWorkflow' => 'ArcanistWorkflow',
     'ArcanistHexadecimalNumericScalarCasingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistHexadecimalNumericScalarCasingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistHgClientChannel' => 'PhutilProtocolChannel',
     'ArcanistHgProxyClient' => 'Phobject',
     'ArcanistHgProxyServer' => 'Phobject',
     'ArcanistHgServerChannel' => 'PhutilProtocolChannel',
     'ArcanistImplicitConstructorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistImplicitConstructorXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistImplicitFallthroughXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistImplicitFallthroughXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistImplicitVisibilityXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistImplicitVisibilityXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistImplodeArgumentOrderXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistImplodeArgumentOrderXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInlineHTMLXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInlineHTMLXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInnerFunctionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInnerFunctionXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInstallCertificateWorkflow' => 'ArcanistWorkflow',
     'ArcanistInstanceOfOperatorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInstanceofOperatorXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInterfaceAbstractMethodXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInterfaceAbstractMethodXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInterfaceMethodBodyXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInterfaceMethodBodyXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInvalidDefaultParameterXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInvalidDefaultParameterXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInvalidModifiersXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInvalidModifiersXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistInvalidOctalNumericScalarXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistInvalidOctalNumericScalarXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistIsAShouldBeInstanceOfXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistIsAShouldBeInstanceOfXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistJSHintLinter' => 'ArcanistExternalLinter',
     'ArcanistJSHintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistJSONLintLinter' => 'ArcanistExternalLinter',
     'ArcanistJSONLintRenderer' => 'ArcanistLintRenderer',
     'ArcanistJSONLinter' => 'ArcanistLinter',
     'ArcanistJSONLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistJscsLinter' => 'ArcanistExternalLinter',
     'ArcanistJscsLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistKeywordCasingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistKeywordCasingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistLambdaFuncFunctionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistLambdaFuncFunctionXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistLandEngine' => 'Phobject',
     'ArcanistLandWorkflow' => 'ArcanistWorkflow',
     'ArcanistLanguageConstructParenthesesXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistLanguageConstructParenthesesXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistLesscLinter' => 'ArcanistExternalLinter',
     'ArcanistLesscLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistLiberateWorkflow' => 'ArcanistWorkflow',
-    'ArcanistLibraryTestCase' => 'PhutilLibraryTestCase',
     'ArcanistLintEngine' => 'Phobject',
     'ArcanistLintMessage' => 'Phobject',
     'ArcanistLintMessageTestCase' => 'PhutilTestCase',
     'ArcanistLintPatcher' => 'Phobject',
     'ArcanistLintRenderer' => 'Phobject',
     'ArcanistLintResult' => 'Phobject',
     'ArcanistLintSeverity' => 'Phobject',
     'ArcanistLintWorkflow' => 'ArcanistWorkflow',
     'ArcanistLinter' => 'Phobject',
     'ArcanistLinterStandard' => 'Phobject',
     'ArcanistLinterStandardTestCase' => 'PhutilTestCase',
     'ArcanistLinterTestCase' => 'PhutilTestCase',
     'ArcanistLintersWorkflow' => 'ArcanistWorkflow',
     'ArcanistListAssignmentXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistListAssignmentXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
+    'ArcanistListConfigOption' => 'ArcanistConfigOption',
     'ArcanistListWorkflow' => 'ArcanistWorkflow',
+    'ArcanistLocalConfigurationSource' => 'ArcanistWorkingCopyConfigurationSource',
+    'ArcanistLogEngine' => 'Phobject',
+    'ArcanistLogMessage' => 'Phobject',
     'ArcanistLogicalOperatorsXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistLogicalOperatorsXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistLowercaseFunctionsXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistLowercaseFunctionsXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistMercurialAPI' => 'ArcanistRepositoryAPI',
     'ArcanistMercurialBranchCommitHardpointLoader' => 'ArcanistMercurialHardpointLoader',
     'ArcanistMercurialHardpointLoader' => 'ArcanistHardpointLoader',
     'ArcanistMercurialParser' => 'Phobject',
     'ArcanistMercurialParserTestCase' => 'PhutilTestCase',
+    'ArcanistMercurialWorkingCopy' => 'ArcanistWorkingCopy',
     'ArcanistMercurialWorkingCopyCommitHardpointLoader' => 'ArcanistMercurialHardpointLoader',
     'ArcanistMergeConflictLinter' => 'ArcanistLinter',
     'ArcanistMergeConflictLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistMessageRevisionHardpointLoader' => 'ArcanistHardpointLoader',
     'ArcanistMissingLinterException' => 'Exception',
     'ArcanistModifierOrderingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistModifierOrderingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistNamespaceFirstStatementXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistNamespaceFirstStatementXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistNamingConventionsXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistNamingConventionsXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistNestedNamespacesXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistNestedNamespacesXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistNewlineAfterOpenTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistNewlineAfterOpenTagXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistNoEffectException' => 'ArcanistUsageException',
     'ArcanistNoEngineException' => 'ArcanistUsageException',
     'ArcanistNoLintLinter' => 'ArcanistLinter',
     'ArcanistNoLintLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistNoParentScopeXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistNoParentScopeXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
+    'ArcanistNoURIConduitException' => 'ArcanistConduitException',
     'ArcanistNoneLintRenderer' => 'ArcanistLintRenderer',
     'ArcanistObjectOperatorSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistObjectOperatorSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPEP8Linter' => 'ArcanistExternalLinter',
     'ArcanistPEP8LinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistPHPCloseTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPHPCloseTagXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPHPCompatibilityXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPHPCompatibilityXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPHPEchoTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPHPEchoTagXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPHPOpenTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPHPOpenTagXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPHPShortTagXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPHPShortTagXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPaamayimNekudotayimSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPaamayimNekudotayimSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistParentMemberReferenceXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistParentMemberReferenceXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistParenthesesSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistParenthesesSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistParseStrUseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistParseStrUseXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPasteWorkflow' => 'ArcanistWorkflow',
     'ArcanistPatchWorkflow' => 'ArcanistWorkflow',
+    'ArcanistPhageToolset' => 'ArcanistToolset',
     'ArcanistPhpLinter' => 'ArcanistExternalLinter',
     'ArcanistPhpLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistPhpcsLinter' => 'ArcanistExternalLinter',
     'ArcanistPhpcsLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistPhpunitTestResultParser' => 'ArcanistTestResultParser',
     'ArcanistPhrequentWorkflow' => 'ArcanistWorkflow',
     'ArcanistPhutilLibraryLinter' => 'ArcanistLinter',
+    'ArcanistPhutilWorkflow' => 'PhutilArgumentWorkflow',
     'ArcanistPhutilXHPASTLinterStandard' => 'ArcanistLinterStandard',
     'ArcanistPlusOperatorOnStringsXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPlusOperatorOnStringsXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPregQuoteMisuseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPregQuoteMisuseXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
+    'ArcanistProjectConfigurationSource' => 'ArcanistWorkingCopyConfigurationSource',
+    'ArcanistPrompt' => 'Phobject',
     'ArcanistPublicPropertyXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistPublicPropertyXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistPuppetLintLinter' => 'ArcanistExternalLinter',
     'ArcanistPuppetLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistPyFlakesLinter' => 'ArcanistExternalLinter',
     'ArcanistPyFlakesLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistPyLintLinter' => 'ArcanistExternalLinter',
     'ArcanistPyLintLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistRaggedClassTreeEdgeXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistRaggedClassTreeEdgeXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistRef' => 'Phobject',
     'ArcanistRefQuery' => 'Phobject',
     'ArcanistRepositoryAPI' => 'Phobject',
     'ArcanistRepositoryAPIMiscTestCase' => 'PhutilTestCase',
     'ArcanistRepositoryAPIStateTestCase' => 'PhutilTestCase',
     'ArcanistRepositoryRef' => 'ArcanistRef',
     'ArcanistReusedAsIteratorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistReusedAsIteratorXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistReusedIteratorReferenceXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistReusedIteratorReferenceXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistReusedIteratorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistReusedIteratorXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistRevertWorkflow' => 'ArcanistWorkflow',
     'ArcanistRevisionRef' => 'ArcanistRef',
     'ArcanistRevisionRefSource' => 'Phobject',
     'ArcanistRuboCopLinter' => 'ArcanistExternalLinter',
     'ArcanistRuboCopLinterTestCase' => 'ArcanistExternalLinterTestCase',
     'ArcanistRubyLinter' => 'ArcanistExternalLinter',
     'ArcanistRubyLinterTestCase' => 'ArcanistExternalLinterTestCase',
+    'ArcanistRuntimeConfigurationSource' => 'ArcanistDictionaryConfigurationSource',
+    'ArcanistScalarConfigOption' => 'ArcanistConfigOption',
     'ArcanistScriptAndRegexLinter' => 'ArcanistLinter',
     'ArcanistSelfClassReferenceXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistSelfClassReferenceXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistSelfMemberReferenceXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistSelfMemberReferenceXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistSemicolonSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistSemicolonSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistSetConfigWorkflow' => 'ArcanistWorkflow',
     'ArcanistSetting' => 'Phobject',
     'ArcanistSettings' => 'Phobject',
     'ArcanistShellCompleteWorkflow' => 'ArcanistWorkflow',
     'ArcanistSingleLintEngine' => 'ArcanistLintEngine',
     'ArcanistSlownessXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistSlownessXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistSpellingLinter' => 'ArcanistLinter',
     'ArcanistSpellingLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistStartWorkflow' => 'ArcanistPhrequentWorkflow',
     'ArcanistStaticThisXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistStaticThisXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistStopWorkflow' => 'ArcanistPhrequentWorkflow',
+    'ArcanistStringConfigOption' => 'ArcanistScalarConfigOption',
     'ArcanistSubversionAPI' => 'ArcanistRepositoryAPI',
+    'ArcanistSubversionWorkingCopy' => 'ArcanistWorkingCopy',
     'ArcanistSummaryLintRenderer' => 'ArcanistLintRenderer',
     'ArcanistSyntaxErrorXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
+    'ArcanistSystemConfigurationSource' => 'ArcanistFilesystemConfigurationSource',
     'ArcanistTasksWorkflow' => 'ArcanistWorkflow',
     'ArcanistTautologicalExpressionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistTautologicalExpressionXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistTestResultParser' => 'Phobject',
     'ArcanistTestXHPASTLintSwitchHook' => 'ArcanistXHPASTLintSwitchHook',
     'ArcanistTextLinter' => 'ArcanistLinter',
     'ArcanistTextLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistThisReassignmentXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistThisReassignmentXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistTimeWorkflow' => 'ArcanistPhrequentWorkflow',
     'ArcanistToStringExceptionXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistToStringExceptionXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistTodoCommentXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistTodoCommentXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistTodoWorkflow' => 'ArcanistWorkflow',
+    'ArcanistToolset' => 'Phobject',
     'ArcanistUSEnglishTranslation' => 'PhutilTranslation',
     'ArcanistUnableToParseXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnaryPostfixExpressionSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnaryPrefixExpressionSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUndeclaredVariableXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUndeclaredVariableXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUnexpectedReturnValueXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnexpectedReturnValueXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUnitConsoleRenderer' => 'ArcanistUnitRenderer',
     'ArcanistUnitRenderer' => 'Phobject',
     'ArcanistUnitTestEngine' => 'Phobject',
     'ArcanistUnitTestResult' => 'Phobject',
     'ArcanistUnitTestResultTestCase' => 'PhutilTestCase',
     'ArcanistUnitTestableLintEngine' => 'ArcanistLintEngine',
     'ArcanistUnitWorkflow' => 'ArcanistWorkflow',
     'ArcanistUnnecessaryFinalModifierXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnnecessaryFinalModifierXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUnnecessarySemicolonXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnnecessarySymbolAliasXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnnecessarySymbolAliasXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUnsafeDynamicStringXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUnsafeDynamicStringXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUpgradeWorkflow' => 'ArcanistWorkflow',
     'ArcanistUploadWorkflow' => 'ArcanistWorkflow',
     'ArcanistUsageException' => 'Exception',
     'ArcanistUseStatementNamespacePrefixXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUseStatementNamespacePrefixXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUselessOverridingMethodXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistUselessOverridingMethodXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistUserAbortException' => 'ArcanistUsageException',
+    'ArcanistUserConfigurationSource' => 'ArcanistFilesystemConfigurationSource',
     'ArcanistVariableReferenceSpacingXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistVariableReferenceSpacingXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistVariableVariableXHPASTLinterRule' => 'ArcanistXHPASTLinterRule',
     'ArcanistVariableVariableXHPASTLinterRuleTestCase' => 'ArcanistXHPASTLinterRuleTestCase',
     'ArcanistVersionWorkflow' => 'ArcanistWorkflow',
     'ArcanistWeldWorkflow' => 'ArcanistWorkflow',
     'ArcanistWhichWorkflow' => 'ArcanistWorkflow',
+    'ArcanistWildConfigOption' => 'ArcanistConfigOption',
     'ArcanistWorkflow' => 'Phobject',
+    'ArcanistWorkflowArgument' => 'Phobject',
+    'ArcanistWorkflowInformation' => 'Phobject',
+    'ArcanistWorkingCopy' => 'Phobject',
+    'ArcanistWorkingCopyConfigurationSource' => 'ArcanistFilesystemConfigurationSource',
     'ArcanistWorkingCopyIdentity' => 'Phobject',
+    'ArcanistWorkingCopyPath' => 'Phobject',
     'ArcanistWorkingCopyStateRef' => 'ArcanistRef',
     'ArcanistXHPASTLintNamingHook' => 'Phobject',
     'ArcanistXHPASTLintNamingHookTestCase' => 'PhutilTestCase',
     'ArcanistXHPASTLintSwitchHook' => 'Phobject',
     'ArcanistXHPASTLinter' => 'ArcanistBaseXHPASTLinter',
     'ArcanistXHPASTLinterRule' => 'Phobject',
     'ArcanistXHPASTLinterRuleTestCase' => 'ArcanistLinterTestCase',
     'ArcanistXHPASTLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistXMLLinter' => 'ArcanistLinter',
     'ArcanistXMLLinterTestCase' => 'ArcanistLinterTestCase',
     'ArcanistXUnitTestResultParser' => 'Phobject',
     'BaseHTTPFuture' => 'Future',
     'CSharpToolsTestEngine' => 'XUnitTestEngine',
     'CaseInsensitiveArray' => 'PhutilArray',
     'CaseInsensitiveArrayTestCase' => 'PhutilTestCase',
     'CommandException' => 'Exception',
     'ConduitClient' => 'Phobject',
     'ConduitClientException' => 'Exception',
     'ConduitClientTestCase' => 'PhutilTestCase',
     'ConduitFuture' => 'FutureProxy',
     'ExecFuture' => 'PhutilExecutableFuture',
     'ExecFutureTestCase' => 'PhutilTestCase',
     'ExecPassthruTestCase' => 'PhutilTestCase',
     'FileFinder' => 'Phobject',
     'FileFinderTestCase' => 'PhutilTestCase',
     'FileList' => 'Phobject',
     'Filesystem' => 'Phobject',
     'FilesystemException' => 'Exception',
     'FilesystemTestCase' => 'PhutilTestCase',
     'Future' => 'Phobject',
     'FutureIterator' => array(
       'Phobject',
       'Iterator',
     ),
     'FutureIteratorTestCase' => 'PhutilTestCase',
     'FutureProxy' => 'Future',
     'HTTPFuture' => 'BaseHTTPFuture',
     'HTTPFutureCURLResponseStatus' => 'HTTPFutureResponseStatus',
     'HTTPFutureCertificateResponseStatus' => 'HTTPFutureResponseStatus',
     'HTTPFutureHTTPResponseStatus' => 'HTTPFutureResponseStatus',
     'HTTPFutureParseResponseStatus' => 'HTTPFutureResponseStatus',
     'HTTPFutureResponseStatus' => 'Exception',
     'HTTPFutureTransportResponseStatus' => 'HTTPFutureResponseStatus',
     'HTTPSFuture' => 'BaseHTTPFuture',
     'ImmediateFuture' => 'Future',
     'LibphutilUSEnglishTranslation' => 'PhutilTranslation',
     'LinesOfALarge' => array(
       'Phobject',
       'Iterator',
     ),
     'LinesOfALargeExecFuture' => 'LinesOfALarge',
     'LinesOfALargeExecFutureTestCase' => 'PhutilTestCase',
     'LinesOfALargeFile' => 'LinesOfALarge',
     'LinesOfALargeFileTestCase' => 'PhutilTestCase',
     'MFilterTestHelper' => 'Phobject',
     'NoseTestEngine' => 'ArcanistUnitTestEngine',
     'PHPASTParserTestCase' => 'PhutilTestCase',
     'PhageAction' => 'Phobject',
     'PhageAgentAction' => 'PhageAction',
     'PhageAgentBootloader' => 'Phobject',
     'PhageAgentTestCase' => 'PhutilTestCase',
     'PhageExecuteAction' => 'PhageAction',
     'PhageLocalAction' => 'PhageAgentAction',
     'PhagePHPAgent' => 'Phobject',
     'PhagePHPAgentBootloader' => 'PhageAgentBootloader',
     'PhagePlanAction' => 'PhageAction',
     'PhageWorkflow' => 'PhutilArgumentWorkflow',
     'Phobject' => 'Iterator',
     'PhobjectTestCase' => 'PhutilTestCase',
     'PhpunitTestEngine' => 'ArcanistUnitTestEngine',
     'PhpunitTestEngineTestCase' => 'PhutilTestCase',
     'PhutilAWSCloudFormationFuture' => 'PhutilAWSFuture',
     'PhutilAWSCloudWatchFuture' => 'PhutilAWSFuture',
     'PhutilAWSEC2Future' => 'PhutilAWSFuture',
     'PhutilAWSException' => 'Exception',
     'PhutilAWSFuture' => 'FutureProxy',
     'PhutilAWSManagementWorkflow' => 'PhutilArgumentWorkflow',
     'PhutilAWSS3DeleteManagementWorkflow' => 'PhutilAWSS3ManagementWorkflow',
     'PhutilAWSS3Future' => 'PhutilAWSFuture',
     'PhutilAWSS3GetManagementWorkflow' => 'PhutilAWSS3ManagementWorkflow',
     'PhutilAWSS3ManagementWorkflow' => 'PhutilAWSManagementWorkflow',
     'PhutilAWSS3PutManagementWorkflow' => 'PhutilAWSS3ManagementWorkflow',
     'PhutilAWSv4Signature' => 'Phobject',
     'PhutilAWSv4SignatureTestCase' => 'PhutilTestCase',
     'PhutilAggregateException' => 'Exception',
     'PhutilAllCapsEnglishLocale' => 'PhutilLocale',
     'PhutilArgumentParser' => 'Phobject',
     'PhutilArgumentParserException' => 'Exception',
     'PhutilArgumentParserTestCase' => 'PhutilTestCase',
     'PhutilArgumentSpecification' => 'Phobject',
     'PhutilArgumentSpecificationException' => 'PhutilArgumentParserException',
     'PhutilArgumentSpecificationTestCase' => 'PhutilTestCase',
     'PhutilArgumentSpellingCorrector' => 'Phobject',
     'PhutilArgumentSpellingCorrectorTestCase' => 'PhutilTestCase',
     'PhutilArgumentUsageException' => 'PhutilArgumentParserException',
     'PhutilArgumentWorkflow' => 'Phobject',
     'PhutilArray' => array(
       'Phobject',
       'Countable',
       'ArrayAccess',
       'Iterator',
     ),
     'PhutilArrayTestCase' => 'PhutilTestCase',
     'PhutilArrayWithDefaultValue' => 'PhutilArray',
     'PhutilAsanaFuture' => 'FutureProxy',
     'PhutilBacktraceSignalHandler' => 'PhutilSignalHandler',
     'PhutilBallOfPHP' => 'Phobject',
     'PhutilBinaryAnalyzer' => 'Phobject',
     'PhutilBinaryAnalyzerTestCase' => 'PhutilTestCase',
     'PhutilBootloaderException' => 'Exception',
     'PhutilBritishEnglishLocale' => 'PhutilLocale',
     'PhutilBufferedIterator' => array(
       'Phobject',
       'Iterator',
     ),
     'PhutilBufferedIteratorTestCase' => 'PhutilTestCase',
     'PhutilBugtraqParser' => 'Phobject',
     'PhutilBugtraqParserTestCase' => 'PhutilTestCase',
     'PhutilCIDRBlock' => 'Phobject',
     'PhutilCIDRList' => 'Phobject',
     'PhutilCallbackFilterIterator' => 'FilterIterator',
     'PhutilCallbackSignalHandler' => 'PhutilSignalHandler',
     'PhutilChannel' => 'Phobject',
     'PhutilChannelChannel' => 'PhutilChannel',
     'PhutilChannelTestCase' => 'PhutilTestCase',
     'PhutilChunkedIterator' => array(
       'Phobject',
       'Iterator',
     ),
     'PhutilChunkedIteratorTestCase' => 'PhutilTestCase',
     'PhutilClassMapQuery' => 'Phobject',
     'PhutilCloudWatchMetric' => 'Phobject',
     'PhutilCommandString' => 'Phobject',
     'PhutilConsole' => 'Phobject',
     'PhutilConsoleBlock' => 'PhutilConsoleView',
     'PhutilConsoleError' => 'PhutilConsoleLogLine',
     'PhutilConsoleFormatter' => 'Phobject',
     'PhutilConsoleInfo' => 'PhutilConsoleLogLine',
     'PhutilConsoleList' => 'PhutilConsoleView',
     'PhutilConsoleLogLine' => 'PhutilConsoleView',
     'PhutilConsoleMessage' => 'Phobject',
     'PhutilConsoleMetrics' => 'Phobject',
     'PhutilConsoleMetricsSignalHandler' => 'PhutilSignalHandler',
     'PhutilConsoleProgressBar' => 'Phobject',
     'PhutilConsoleProgressSink' => 'PhutilProgressSink',
     'PhutilConsoleServer' => 'Phobject',
     'PhutilConsoleServerChannel' => 'PhutilChannelChannel',
     'PhutilConsoleSkip' => 'PhutilConsoleLogLine',
     'PhutilConsoleStdinNotInteractiveException' => 'Exception',
     'PhutilConsoleTable' => 'PhutilConsoleView',
     'PhutilConsoleView' => 'Phobject',
     'PhutilConsoleWarning' => 'PhutilConsoleLogLine',
     'PhutilConsoleWrapTestCase' => 'PhutilTestCase',
     'PhutilCowsay' => 'Phobject',
     'PhutilCowsayTestCase' => 'PhutilTestCase',
     'PhutilCsprintfTestCase' => 'PhutilTestCase',
     'PhutilCzechLocale' => 'PhutilLocale',
     'PhutilDOMNode' => 'Phobject',
     'PhutilDeferredLog' => 'Phobject',
     'PhutilDeferredLogTestCase' => 'PhutilTestCase',
     'PhutilDiffBinaryAnalyzer' => 'PhutilBinaryAnalyzer',
     'PhutilDirectedScalarGraph' => 'AbstractDirectedGraph',
     'PhutilDirectoryFixture' => 'Phobject',
     'PhutilDocblockParser' => 'Phobject',
     'PhutilDocblockParserTestCase' => 'PhutilTestCase',
     'PhutilEditDistanceMatrix' => 'Phobject',
     'PhutilEditDistanceMatrixTestCase' => 'PhutilTestCase',
     'PhutilEditorConfig' => 'Phobject',
     'PhutilEditorConfigTestCase' => 'PhutilTestCase',
     'PhutilEmailAddress' => 'Phobject',
     'PhutilEmailAddressTestCase' => 'PhutilTestCase',
     'PhutilEmojiLocale' => 'PhutilLocale',
     'PhutilEnglishCanadaLocale' => 'PhutilLocale',
     'PhutilErrorHandler' => 'Phobject',
     'PhutilErrorHandlerTestCase' => 'PhutilTestCase',
     'PhutilErrorTrap' => 'Phobject',
     'PhutilEvent' => 'Phobject',
     'PhutilEventConstants' => 'Phobject',
     'PhutilEventEngine' => 'Phobject',
     'PhutilEventListener' => 'Phobject',
     'PhutilEventType' => 'PhutilEventConstants',
     'PhutilExampleBufferedIterator' => 'PhutilBufferedIterator',
     'PhutilExecChannel' => 'PhutilChannel',
     'PhutilExecPassthru' => 'PhutilExecutableFuture',
     'PhutilExecutableFuture' => 'Future',
     'PhutilExecutionEnvironment' => 'Phobject',
     'PhutilFileLock' => 'PhutilLock',
     'PhutilFileLockTestCase' => 'PhutilTestCase',
     'PhutilFileTree' => 'Phobject',
     'PhutilFrenchLocale' => 'PhutilLocale',
     'PhutilGermanLocale' => 'PhutilLocale',
     'PhutilGitBinaryAnalyzer' => 'PhutilBinaryAnalyzer',
     'PhutilGitHubFuture' => 'FutureProxy',
     'PhutilGitHubResponse' => 'Phobject',
     'PhutilGitURI' => 'Phobject',
     'PhutilGitURITestCase' => 'PhutilTestCase',
     'PhutilHTMLParser' => 'Phobject',
     'PhutilHTMLParserTestCase' => 'PhutilTestCase',
     'PhutilHTTPEngineExtension' => 'Phobject',
     'PhutilHTTPResponse' => 'Phobject',
     'PhutilHTTPResponseParser' => 'Phobject',
     'PhutilHTTPResponseParserTestCase' => 'PhutilTestCase',
     'PhutilHashingIterator' => array(
       'PhutilProxyIterator',
       'Iterator',
     ),
     'PhutilHashingIteratorTestCase' => 'PhutilTestCase',
     'PhutilHelpArgumentWorkflow' => 'PhutilArgumentWorkflow',
     'PhutilHgsprintfTestCase' => 'PhutilTestCase',
     'PhutilINIParserException' => 'Exception',
     'PhutilIPAddress' => 'Phobject',
     'PhutilIPAddressTestCase' => 'PhutilTestCase',
     'PhutilIPv4Address' => 'PhutilIPAddress',
     'PhutilIPv6Address' => 'PhutilIPAddress',
     'PhutilInteractiveEditor' => 'Phobject',
     'PhutilInvalidRuleParserGeneratorException' => 'PhutilParserGeneratorException',
     'PhutilInvalidStateException' => 'Exception',
     'PhutilInvalidStateExceptionTestCase' => 'PhutilTestCase',
     'PhutilIrreducibleRuleParserGeneratorException' => 'PhutilParserGeneratorException',
     'PhutilJSON' => 'Phobject',
     'PhutilJSONFragmentLexer' => 'PhutilLexer',
     'PhutilJSONParser' => 'Phobject',
     'PhutilJSONParserException' => 'Exception',
     'PhutilJSONParserTestCase' => 'PhutilTestCase',
     'PhutilJSONProtocolChannel' => 'PhutilProtocolChannel',
     'PhutilJSONProtocolChannelTestCase' => 'PhutilTestCase',
     'PhutilJSONTestCase' => 'PhutilTestCase',
     'PhutilJavaFragmentLexer' => 'PhutilLexer',
     'PhutilKoreanLocale' => 'PhutilLocale',
     'PhutilLanguageGuesser' => 'Phobject',
     'PhutilLanguageGuesserTestCase' => 'PhutilTestCase',
     'PhutilLexer' => 'Phobject',
     'PhutilLibraryConflictException' => 'Exception',
     'PhutilLibraryMapBuilder' => 'Phobject',
     'PhutilLibraryTestCase' => 'PhutilTestCase',
     'PhutilLocale' => 'Phobject',
     'PhutilLocaleTestCase' => 'PhutilTestCase',
     'PhutilLock' => 'Phobject',
     'PhutilLockException' => 'Exception',
     'PhutilLogFileChannel' => 'PhutilChannelChannel',
     'PhutilLunarPhase' => 'Phobject',
     'PhutilLunarPhaseTestCase' => 'PhutilTestCase',
     'PhutilMercurialBinaryAnalyzer' => 'PhutilBinaryAnalyzer',
     'PhutilMethodNotImplementedException' => 'Exception',
     'PhutilMetricsChannel' => 'PhutilChannelChannel',
     'PhutilMissingSymbolException' => 'Exception',
     'PhutilModuleUtilsTestCase' => 'PhutilTestCase',
     'PhutilNumber' => 'Phobject',
     'PhutilOAuth1Future' => 'FutureProxy',
     'PhutilOAuth1FutureTestCase' => 'PhutilTestCase',
     'PhutilOpaqueEnvelope' => 'Phobject',
     'PhutilOpaqueEnvelopeKey' => 'Phobject',
     'PhutilOpaqueEnvelopeTestCase' => 'PhutilTestCase',
     'PhutilPHPFragmentLexer' => 'PhutilLexer',
     'PhutilPHPFragmentLexerTestCase' => 'PhutilTestCase',
     'PhutilPHPObjectProtocolChannel' => 'PhutilProtocolChannel',
     'PhutilPHPObjectProtocolChannelTestCase' => 'PhutilTestCase',
     'PhutilParserGenerator' => 'Phobject',
     'PhutilParserGeneratorException' => 'Exception',
     'PhutilParserGeneratorTestCase' => 'PhutilTestCase',
     'PhutilPayPalAPIFuture' => 'FutureProxy',
     'PhutilPersonTest' => array(
       'Phobject',
       'PhutilPerson',
     ),
     'PhutilPhtTestCase' => 'PhutilTestCase',
     'PhutilPirateEnglishLocale' => 'PhutilLocale',
     'PhutilPortugueseBrazilLocale' => 'PhutilLocale',
     'PhutilPortuguesePortugalLocale' => 'PhutilLocale',
     'PhutilPostmarkFuture' => 'FutureProxy',
     'PhutilPregsprintfTestCase' => 'PhutilTestCase',
     'PhutilProcessQuery' => 'Phobject',
     'PhutilProcessRef' => 'Phobject',
     'PhutilProcessRefTestCase' => 'PhutilTestCase',
     'PhutilProgressSink' => 'Phobject',
     'PhutilProtocolChannel' => 'PhutilChannelChannel',
     'PhutilProxyException' => 'Exception',
     'PhutilProxyIterator' => array(
       'Phobject',
       'Iterator',
     ),
     'PhutilPygmentizeBinaryAnalyzer' => 'PhutilBinaryAnalyzer',
     'PhutilPythonFragmentLexer' => 'PhutilLexer',
     'PhutilQueryStringParser' => 'Phobject',
     'PhutilQueryStringParserTestCase' => 'PhutilTestCase',
     'PhutilRawEnglishLocale' => 'PhutilLocale',
     'PhutilReadableSerializer' => 'Phobject',
     'PhutilReadableSerializerTestCase' => 'PhutilTestCase',
     'PhutilRope' => 'Phobject',
     'PhutilRopeTestCase' => 'PhutilTestCase',
     'PhutilServiceProfiler' => 'Phobject',
     'PhutilShellLexer' => 'PhutilLexer',
     'PhutilShellLexerTestCase' => 'PhutilTestCase',
     'PhutilSignalHandler' => 'Phobject',
     'PhutilSignalRouter' => 'Phobject',
     'PhutilSimpleOptions' => 'Phobject',
     'PhutilSimpleOptionsLexer' => 'PhutilLexer',
     'PhutilSimpleOptionsLexerTestCase' => 'PhutilTestCase',
     'PhutilSimpleOptionsTestCase' => 'PhutilTestCase',
     'PhutilSimplifiedChineseLocale' => 'PhutilLocale',
     'PhutilSlackFuture' => 'FutureProxy',
     'PhutilSocketChannel' => 'PhutilChannel',
     'PhutilSortVector' => 'Phobject',
     'PhutilSpanishSpainLocale' => 'PhutilLocale',
     'PhutilStreamIterator' => array(
       'Phobject',
       'Iterator',
     ),
     'PhutilSubversionBinaryAnalyzer' => 'PhutilBinaryAnalyzer',
     'PhutilSystem' => 'Phobject',
     'PhutilSystemTestCase' => 'PhutilTestCase',
     'PhutilTerminalString' => 'Phobject',
     'PhutilTestCase' => 'Phobject',
     'PhutilTestCaseTestCase' => 'PhutilTestCase',
     'PhutilTestPhobject' => 'Phobject',
     'PhutilTestSkippedException' => 'Exception',
     'PhutilTestTerminatedException' => 'Exception',
     'PhutilTraditionalChineseLocale' => 'PhutilLocale',
     'PhutilTranslation' => 'Phobject',
     'PhutilTranslationTestCase' => 'PhutilTestCase',
     'PhutilTranslator' => 'Phobject',
     'PhutilTranslatorTestCase' => 'PhutilTestCase',
     'PhutilTsprintfTestCase' => 'PhutilTestCase',
     'PhutilTwitchFuture' => 'FutureProxy',
     'PhutilTypeCheckException' => 'Exception',
     'PhutilTypeExtraParametersException' => 'Exception',
     'PhutilTypeLexer' => 'PhutilLexer',
     'PhutilTypeMissingParametersException' => 'Exception',
     'PhutilTypeSpec' => 'Phobject',
     'PhutilTypeSpecTestCase' => 'PhutilTestCase',
     'PhutilURI' => 'Phobject',
     'PhutilURITestCase' => 'PhutilTestCase',
     'PhutilUSEnglishLocale' => 'PhutilLocale',
     'PhutilUTF8StringTruncator' => 'Phobject',
     'PhutilUTF8TestCase' => 'PhutilTestCase',
     'PhutilUnitTestEngine' => 'ArcanistUnitTestEngine',
     'PhutilUnitTestEngineTestCase' => 'PhutilTestCase',
     'PhutilUnknownSymbolParserGeneratorException' => 'PhutilParserGeneratorException',
     'PhutilUnreachableRuleParserGeneratorException' => 'PhutilParserGeneratorException',
     'PhutilUnreachableTerminalParserGeneratorException' => 'PhutilParserGeneratorException',
     'PhutilUrisprintfTestCase' => 'PhutilTestCase',
     'PhutilUtilsTestCase' => 'PhutilTestCase',
     'PhutilVeryWowEnglishLocale' => 'PhutilLocale',
     'PhutilWordPressFuture' => 'FutureProxy',
     'PhutilXHPASTBinary' => 'Phobject',
     'PytestTestEngine' => 'ArcanistUnitTestEngine',
     'TempFile' => 'Phobject',
     'TestAbstractDirectedGraph' => 'AbstractDirectedGraph',
     'XHPASTNode' => 'AASTNode',
     'XHPASTNodeTestCase' => 'PhutilTestCase',
     'XHPASTSyntaxErrorException' => 'Exception',
     'XHPASTToken' => 'AASTToken',
     'XHPASTTree' => 'AASTTree',
     'XHPASTTreeTestCase' => 'PhutilTestCase',
     'XUnitTestEngine' => 'ArcanistUnitTestEngine',
     'XUnitTestResultParserTestCase' => 'PhutilTestCase',
     'XsprintfUnknownConversionException' => 'InvalidArgumentException',
   ),
 ));
diff --git a/src/__tests__/ArcanistLibraryTestCase.php b/src/__tests__/ArcanistLibraryTestCase.php
deleted file mode 100644
index 472947e6..00000000
--- a/src/__tests__/ArcanistLibraryTestCase.php
+++ /dev/null
@@ -1,3 +0,0 @@
-<?php
-
-final class ArcanistLibraryTestCase extends PhutilLibraryTestCase {}
diff --git a/src/conduit/ArcanistConduitException.php b/src/conduit/ArcanistConduitException.php
new file mode 100644
index 00000000..f17e2ae8
--- /dev/null
+++ b/src/conduit/ArcanistConduitException.php
@@ -0,0 +1,3 @@
+<?php
+
+abstract class ArcanistConduitException extends Exception {}
diff --git a/src/conduit/ArcanistNoURIConduitException.php b/src/conduit/ArcanistNoURIConduitException.php
new file mode 100644
index 00000000..058fbad7
--- /dev/null
+++ b/src/conduit/ArcanistNoURIConduitException.php
@@ -0,0 +1,4 @@
+<?php
+
+final class ArcanistNoURIConduitException
+  extends ArcanistConduitException {}
diff --git a/src/config/ArcanistConfigurationEngine.php b/src/config/ArcanistConfigurationEngine.php
new file mode 100644
index 00000000..81f24eb5
--- /dev/null
+++ b/src/config/ArcanistConfigurationEngine.php
@@ -0,0 +1,231 @@
+<?php
+
+final class ArcanistConfigurationEngine
+  extends Phobject {
+
+  private $workingCopy;
+  private $arguments;
+  private $toolset;
+
+  public function setWorkingCopy(ArcanistWorkingCopy $working_copy) {
+    $this->workingCopy = $working_copy;
+    return $this;
+  }
+
+  public function getWorkingCopy() {
+    return $this->workingCopy;
+  }
+
+  public function setArguments(PhutilArgumentParser $arguments) {
+    $this->arguments = $arguments;
+    return $this;
+  }
+
+  public function getArguments() {
+    if (!$this->arguments) {
+      throw new PhutilInvalidStateException('setArguments');
+    }
+    return $this->arguments;
+  }
+
+  public function newConfigurationSourceList() {
+    $list = new ArcanistConfigurationSourceList();
+
+    $list->addSource(new ArcanistDefaultsConfigurationSource());
+
+    $arguments = $this->getArguments();
+
+    // If the invoker has provided one or more configuration files with
+    // "--config-file" arguments, read those files instead of the system
+    // and user configuration files. Otherwise, read the system and user
+    // configuration files.
+
+    $config_files = $arguments->getArg('config-file');
+    if ($config_files) {
+      foreach ($config_files as $config_file) {
+        $list->addSource(new ArcanistFileConfigurationSource($config_file));
+      }
+    } else {
+      $system_path = $this->getSystemConfigurationFilePath();
+      $list->addSource(new ArcanistSystemConfigurationSource($system_path));
+
+      $user_path = $this->getUserConfigurationFilePath();
+      $list->addSource(new ArcanistUserConfigurationSource($user_path));
+    }
+
+
+    // If we're running in a working copy, load the ".arcconfig" and any
+    // local configuration.
+    $working_copy = $this->getWorkingCopy();
+    if ($working_copy) {
+      $project_path = $working_copy->getProjectConfigurationFilePath();
+      if ($project_path !== null) {
+        $list->addSource(new ArcanistProjectConfigurationSource($project_path));
+      }
+
+      $local_path = $working_copy->getLocalConfigurationFilePath();
+      if ($local_path !== null) {
+        $list->addSource(new ArcanistLocalConfigurationSource($local_path));
+      }
+    }
+
+    // If the invoker has provided "--config" arguments, parse those now.
+    $runtime_args = $arguments->getArg('config');
+    if ($runtime_args) {
+      $list->addSource(new ArcanistRuntimeConfigurationSource($runtime_args));
+    }
+
+    return $list;
+  }
+
+  private function getSystemConfigurationFilePath() {
+    if (phutil_is_windows()) {
+      return Filesystem::resolvePath(
+        'Phabricator/Arcanist/config',
+        getenv('ProgramData'));
+    } else {
+      return '/etc/arcconfig';
+    }
+  }
+
+  private function getUserConfigurationFilePath() {
+    if (phutil_is_windows()) {
+      return getenv('APPDATA').'/.arcrc';
+    } else {
+      return getenv('HOME').'/.arcrc';
+    }
+  }
+
+  public function newDefaults() {
+    $map = $this->newConfigOptionsMap();
+    return mpull($map, 'getDefaultValue');
+  }
+
+  public function newConfigOptionsMap() {
+    $extensions = $this->newEngineExtensions();
+
+    $map = array();
+    $alias_map = array();
+    foreach ($extensions as $extension) {
+      $options = $extension->newConfigurationOptions();
+
+      foreach ($options as $option) {
+        $key = $option->getKey();
+
+        $this->validateConfigOptionKey($key, $extension);
+
+        if (isset($map[$key])) {
+          throw new Exception(
+            pht(
+              'Configuration option ("%s") defined by extension "%s" '.
+              'conflicts with an existing option. Each option must have '.
+              'a unique key.',
+              $key,
+              get_class($extension)));
+        }
+
+        if (isset($alias_map[$key])) {
+          throw new Exception(
+            pht(
+              'Configuration option ("%s") defined by extension "%s" '.
+              'conflicts with an alias for another option ("%s"). The '.
+              'key and aliases of each option must be unique.',
+              $key,
+              get_class($extension),
+              $alias_map[$key]->getKey()));
+        }
+
+        $map[$key] = $option;
+
+        foreach ($option->getAliases() as $alias) {
+          $this->validateConfigOptionKey($alias, $extension, $key);
+
+          if (isset($map[$alias])) {
+            throw new Exception(
+              pht(
+                'Configuration option ("%s") defined by extension "%s" '.
+                'has an alias ("%s") which conflicts with an existing '.
+                'option. The key and aliases of each option must be '.
+                'unique.',
+                $key,
+                get_class($extension),
+                $alias));
+          }
+
+          if (isset($alias_map[$alias])) {
+            throw new Exception(
+              pht(
+                'Configuration option ("%s") defined by extension "%s" '.
+                'has an alias ("%s") which conflicts with the alias of '.
+                'another configuration option ("%s"). The key and aliases '.
+                'of each option must be unique.',
+                $key,
+                get_class($extension),
+                $alias,
+                $alias_map[$alias]->getKey()));
+          }
+
+          $alias_map[$alias] = $option;
+        }
+      }
+    }
+
+    return $map;
+  }
+
+  private function validateConfigOptionKey(
+    $key,
+    ArcanistConfigurationEngineExtension $extension,
+    $is_alias_of = null) {
+
+    $reserved = array(
+      // The presence of this key is used to detect old "~/.arcrc" files, so
+      // configuration options may not use it.
+      'config',
+    );
+    $reserved = array_fuse($reserved);
+
+    if (isset($reserved[$key])) {
+      throw new Exception(
+        pht(
+          'Extension ("%s") defines invalid configuration with key "%s". '.
+          'This key is reserved.',
+          get_class($extension),
+          $key));
+    }
+
+    $is_ok = preg_match('(^[a-z][a-z0-9._-]{2,}\z)', $key);
+    if (!$is_ok) {
+      if ($is_alias_of === null) {
+        throw new Exception(
+          pht(
+            'Extension ("%s") defines invalid configuration with key "%s". '.
+            'Configuration keys: may only contain lowercase letters, '.
+            'numbers, hyphens, underscores, and periods; must start with a '.
+            'letter; and must be at least three characters long.',
+            get_class($extension),
+            $key));
+      } else {
+        throw new Exception(
+          pht(
+            'Extension ("%s") defines invalid alias ("%s") for configuration '.
+            'key ("%s"). Configuration keys and aliases: may only contain '.
+            'lowercase letters, numbers, hyphens, underscores, and periods; '.
+            'must start with a letter; and must be at least three characters '.
+            'long.',
+            get_class($extension),
+            $key,
+            $is_alias_of));
+      }
+    }
+  }
+
+  private function newEngineExtensions() {
+    return id(new PhutilClassMapQuery())
+      ->setAncestorClass('ArcanistConfigurationEngineExtension')
+      ->setUniqueMethod('getExtensionKey')
+      ->setContinueOnFailure(true)
+      ->execute();
+  }
+
+}
diff --git a/src/config/ArcanistConfigurationEngineExtension.php b/src/config/ArcanistConfigurationEngineExtension.php
new file mode 100644
index 00000000..26566b93
--- /dev/null
+++ b/src/config/ArcanistConfigurationEngineExtension.php
@@ -0,0 +1,10 @@
+<?php
+
+abstract class ArcanistConfigurationEngineExtension
+  extends Phobject {
+
+  final public function getExtensionKey() {
+    return $this->getPhobjectClassConstant('EXTENSIONKEY');
+  }
+
+}
diff --git a/src/config/ArcanistConfigurationSourceList.php b/src/config/ArcanistConfigurationSourceList.php
new file mode 100644
index 00000000..f5516c51
--- /dev/null
+++ b/src/config/ArcanistConfigurationSourceList.php
@@ -0,0 +1,202 @@
+<?php
+
+final class ArcanistConfigurationSourceList
+  extends Phobject {
+
+  private $sources = array();
+  private $configOptions;
+
+  public function addSource(ArcanistConfigurationSource $source) {
+    $this->sources[] = $source;
+    return $this;
+  }
+
+  public function getSources() {
+    return $this->sources;
+  }
+
+  private function getSourcesWithScopes($scopes) {
+    if ($scopes !== null) {
+      $scopes = array_fuse($scopes);
+    }
+
+    $results = array();
+    foreach ($this->getSources() as $source) {
+      if ($scopes !== null) {
+        $scope = $source->getConfigurationSourceScope();
+        if ($scope === null) {
+          continue;
+        }
+        if (!isset($scopes[$scope])) {
+          continue;
+        }
+      }
+
+      $results[] = $source;
+    }
+
+    return $results;
+  }
+
+  public function getWritableSourceFromScope($scope) {
+    $sources = $this->getSourcesWithScopes(array($scope));
+
+    $writable = array();
+    foreach ($sources as $source) {
+      if (!$source->isWritableConfigurationSource()) {
+        continue;
+      }
+
+      $writable[] = $source;
+    }
+
+    if (!$writable) {
+      throw new Exception(
+        pht(
+          'Unable to write configuration: there is no writable configuration '.
+          'source in the "%s" scope.',
+          $scope));
+    }
+
+    if (count($writable) > 1) {
+      throw new Exception(
+        pht(
+          'Unable to write configuration: more than one writable source '.
+          'exists in the "%s" scope.',
+          $scope));
+    }
+
+    return head($writable);
+  }
+
+  public function getConfig($key) {
+    $option = $this->getConfigOption($key);
+    $values = $this->getStorageValueList($key);
+    return $option->getValueFromStorageValueList($values);
+  }
+
+  public function getConfigFromScopes($key, array $scopes) {
+    $option = $this->getConfigOption($key);
+    $values = $this->getStorageValueListFromScopes($key, $scopes);
+    return $option->getValueFromStorageValueList($values);
+  }
+
+  public function getStorageValueList($key) {
+    return $this->getStorageValueListFromScopes($key, null);
+  }
+
+  private function getStorageValueListFromScopes($key, $scopes) {
+    $values = array();
+
+    foreach ($this->getSourcesWithScopes($scopes) as $source) {
+      if ($source->hasValueForKey($key)) {
+        $value = $source->getValueForKey($key);
+        $values[] = new ArcanistConfigurationSourceValue(
+          $source,
+          $source->getValueForKey($key));
+      }
+    }
+
+    return $values;
+  }
+
+  public function getConfigOption($key) {
+    $options = $this->getConfigOptions();
+
+    if (!isset($options[$key])) {
+      throw new Exception(
+        pht(
+          'Configuration option ("%s") is unrecognized. You can only read '.
+          'recognized configuration options.',
+          $key));
+    }
+
+    return $options[$key];
+  }
+
+  public function setConfigOptions(array $config_options) {
+    assert_instances_of($config_options, 'ArcanistConfigOption');
+
+    $config_options = mpull($config_options, null, 'getKey');
+    $this->configOptions = $config_options;
+
+    return $this;
+  }
+
+  public function getConfigOptions() {
+    if ($this->configOptions === null) {
+      throw new PhutilInvalidStateException('setConfigOptions');
+    }
+
+    return $this->configOptions;
+  }
+
+  public function validateConfiguration(ArcanistRuntime $runtime) {
+    $options = $this->getConfigOptions();
+
+    $aliases = array();
+    foreach ($options as $key => $option) {
+      foreach ($option->getAliases() as $alias) {
+        $aliases[$alias] = $key;
+      }
+    }
+
+    // TOOLSETS: Handle the case where config specifies both a value and an
+    // alias for that value. The alias should be ignored and we should emit
+    // a warning. This also needs to be implemented when actually reading
+    // configuration.
+
+    $value_lists = array();
+    foreach ($this->getSources() as $source) {
+      $keys = $source->getAllKeys();
+      foreach ($keys as $key) {
+        $resolved_key = idx($aliases, $key, $key);
+        $option = idx($options, $resolved_key);
+
+        // If there's no option object for this config, this value is
+        // unrecognized. Sources are free to handle this however they want:
+        // for config files we emit a warning; for "--config" we fatal.
+
+        if (!$option) {
+          $source->didReadUnknownOption($runtime, $key);
+          continue;
+        }
+
+        $raw_value = $source->getValueForKey($key);
+
+        // Make sure we can convert whatever value the configuration source is
+        // providing into a legitimate runtime value.
+        try {
+          $value = $raw_value;
+          if ($source->isStringSource()) {
+            $value = $option->getStorageValueFromStringValue($value);
+          }
+          $option->getValueFromStorageValue($value);
+
+          $value_lists[$resolved_key][] = new ArcanistConfigurationSourceValue(
+            $source,
+            $raw_value);
+        } catch (Exception $ex) {
+          throw new PhutilProxyException(
+            pht(
+              'Configuration value ("%s") defined in source "%s" is not '.
+              'valid.',
+              $key,
+              $source->getSourceDisplayName()),
+            $ex);
+        }
+      }
+    }
+
+    // Make sure each value list can be merged.
+    foreach ($value_lists as $key => $value_list) {
+      try {
+        $options[$key]->getValueFromStorageValueList($value_list);
+      } catch (Exception $ex) {
+        throw $ex;
+      }
+    }
+
+  }
+
+}
diff --git a/src/config/ArcanistConfigurationSourceValue.php b/src/config/ArcanistConfigurationSourceValue.php
new file mode 100644
index 00000000..6a3340b9
--- /dev/null
+++ b/src/config/ArcanistConfigurationSourceValue.php
@@ -0,0 +1,22 @@
+<?php
+
+final class ArcanistConfigurationSourceValue
+  extends Phobject {
+
+  private $source;
+  private $value;
+
+  public function __construct(ArcanistConfigurationSource $source, $value) {
+    $this->source = $source;
+    $this->value = $value;
+  }
+
+  public function getConfigurationSource() {
+    return $this->source;
+  }
+
+  public function getValue() {
+    return $this->value;
+  }
+
+}
diff --git a/src/config/arc/ArcanistArcConfigurationEngineExtension.php b/src/config/arc/ArcanistArcConfigurationEngineExtension.php
new file mode 100644
index 00000000..634a6ec3
--- /dev/null
+++ b/src/config/arc/ArcanistArcConfigurationEngineExtension.php
@@ -0,0 +1,159 @@
+<?php
+
+final class ArcanistArcConfigurationEngineExtension
+  extends ArcanistConfigurationEngineExtension {
+
+  const EXTENSIONKEY = 'arc';
+
+  const KEY_ALIASES = 'aliases';
+
+  public function newConfigurationOptions() {
+    // TOOLSETS: Restore "load", and maybe this other stuff.
+
+/*
+      'load' => array(
+        'type' => 'list',
+        'legacy' => 'phutil_libraries',
+        'help' => pht(
+          'A list of paths to phutil libraries that should be loaded at '.
+          'startup. This can be used to make classes available, like lint '.
+          'or unit test engines.'),
+        'default' => array(),
+        'example' => '["/var/arc/customlib/src"]',
+      ),
+
+      'arc.feature.start.default' => array(
+        'type' => 'string',
+        'help' => pht(
+          'The name of the default branch to create the new feature branch '.
+          'off of.'),
+        'example' => '"develop"',
+      ),
+      'arc.land.onto.default' => array(
+        'type' => 'string',
+        'help' => pht(
+          'The name of the default branch to land changes onto when '.
+          '`%s` is run.',
+          'arc land'),
+        'example' => '"develop"',
+      ),
+
+      'arc.autostash' => array(
+        'type' => 'bool',
+        'help' => pht(
+          'Whether %s should permit the automatic stashing of changes in the '.
+          'working directory when requiring a clean working copy. This option '.
+          'should only be used when users understand how to restore their '.
+          'working directory from the local stash if an Arcanist operation '.
+          'causes an unrecoverable error.',
+          'arc'),
+        'default' => false,
+        'example' => 'false',
+      ),
+
+      'history.immutable' => array(
+        'type' => 'bool',
+        'legacy' => 'immutable_history',
+        'help' => pht(
+          'If true, %s will never change repository history (e.g., through '.
+          'amending or rebasing). Defaults to true in Mercurial and false in '.
+          'Git. This setting has no effect in Subversion.',
+          'arc'),
+        'example' => 'false',
+      ),
+      'editor' => array(
+        'type' => 'string',
+        'help' => pht(
+          'Command to use to invoke an interactive editor, like `%s` or `%s`. '.
+          'This setting overrides the %s environmental variable.',
+          'nano',
+          'vim',
+          'EDITOR'),
+        'example' => '"nano"',
+      ),
+      'https.cabundle' => array(
+        'type' => 'string',
+        'help' => pht(
+          "Path to a custom CA bundle file to be used for arcanist's cURL ".
+          "calls. This is used primarily when your conduit endpoint is ".
+          "behind HTTPS signed by your organization's internal CA."),
+        'example' => 'support/yourca.pem',
+      ),
+      'https.blindly-trust-domains' => array(
+        'type' => 'list',
+        'help' => pht(
+          'List of domains to blindly trust SSL certificates for. '.
+          'Disables peer verification.'),
+        'default' => array(),
+        'example' => '["secure.mycompany.com"]',
+      ),
+      'browser' => array(
+        'type' => 'string',
+        'help' => pht('Command to use to invoke a web browser.'),
+        'example' => '"gnome-www-browser"',
+      ),
+*/
+
+
+
+    return array(
+      id(new ArcanistStringConfigOption())
+        ->setKey('base')
+        ->setSummary(pht('Ruleset for selecting commit ranges.'))
+        ->setHelp(
+          pht(
+            'Base commit ruleset to invoke when determining the start of a '.
+            'commit range. See "Arcanist User Guide: Commit Ranges" for '.
+            'details.'))
+        ->setExamples(
+          array(
+            'arc:amended, arc:prompt',
+          )),
+      id(new ArcanistStringConfigOption())
+        ->setKey('repository')
+        ->setAliases(
+          array(
+            'repository.callsign',
+          ))
+        ->setSummary(pht('Repository for the current working copy.'))
+        ->setHelp(
+          pht(
+            'Associate the working copy with a specific Phabricator '.
+            'repository. Normally, `arc` can figure this association out on '.
+            'its own, but if your setup is unusual you can use this option '.
+            'to tell it what the desired value is.'))
+        ->setExamples(
+          array(
+            'libexample',
+            'XYZ',
+            'R123',
+            '123',
+          )),
+      id(new ArcanistStringConfigOption())
+        ->setKey('phabricator.uri')
+        ->setAliases(
+          array(
+            'conduit_uri',
+            'default',
+          ))
+        ->setSummary(pht('Phabricator install to connect to.'))
+        ->setHelp(
+          pht(
+            'Associates this working copy with a specific installation of '.
+            'Phabricator.'))
+        ->setExamples(
+          array(
+            'https://phabricator.mycompany.com/',
+          )),
+      id(new ArcanistAliasesConfigOption())
+        ->setKey(self::KEY_ALIASES)
+        ->setDefaultValue(array())
+        ->setSummary(pht('List of command aliases.'))
+        ->setHelp(
+          pht(
+            'Configured command aliases. Use the "alias" workflow to define '.
+            'aliases.')),
+    );
+  }
+
+}
diff --git a/src/config/option/ArcanistAliasesConfigOption.php b/src/config/option/ArcanistAliasesConfigOption.php
new file mode 100644
index 00000000..974088ea
--- /dev/null
+++ b/src/config/option/ArcanistAliasesConfigOption.php
@@ -0,0 +1,36 @@
+<?php
+
+final class ArcanistAliasesConfigOption
+  extends ArcanistListConfigOption {
+
+  public function getType() {
+    return 'list<alias>';
+  }
+
+  public function getValueFromStorageValue($value) {
+    if (!is_array($value)) {
+      throw new Exception(pht('Expected a list or dictionary!'));
+    }
+
+    $aliases = array();
+    foreach ($value as $key => $spec) {
+      $aliases[] = ArcanistAlias::newFromConfig($key, $spec);
+    }
+
+    return $aliases;
+  }
+
+  protected function didReadStorageValueList(array $list) {
+    assert_instances_of($list, 'ArcanistConfigurationSourceValue');
+    return mpull($list, 'getValue');
+  }
+
+  public function getDisplayValueFromValue($value) {
+    return pht('Use the "alias" workflow to review aliases.');
+  }
+
+  public function getStorageValueFromValue($value) {
+    return mpull($value, 'getStorageDictionary');
+  }
+
+}
diff --git a/src/config/option/ArcanistConfigOption.php b/src/config/option/ArcanistConfigOption.php
new file mode 100644
index 00000000..40ea1fcc
--- /dev/null
+++ b/src/config/option/ArcanistConfigOption.php
@@ -0,0 +1,100 @@
+<?php
+
+abstract class ArcanistConfigOption
+  extends Phobject {
+
+  private $key;
+  private $help;
+  private $summary;
+  private $aliases = array();
+  private $examples = array();
+  private $defaultValue;
+
+  public function setKey($key) {
+    $this->key = $key;
+    return $this;
+  }
+
+  public function getKey() {
+    return $this->key;
+  }
+
+  public function setAliases($aliases) {
+    $this->aliases = $aliases;
+    return $this;
+  }
+
+  public function getAliases() {
+    return $this->aliases;
+  }
+
+  public function setSummary($summary) {
+    $this->summary = $summary;
+    return $this;
+  }
+
+  public function getSummary() {
+    return $this->summary;
+  }
+
+  public function setHelp($help) {
+    $this->help = $help;
+    return $this;
+  }
+
+  public function getHelp() {
+    return $this->help;
+  }
+
+  public function setExamples(array $examples) {
+    $this->examples = $examples;
+    return $this;
+  }
+
+  public function getExamples() {
+    return $this->examples;
+  }
+
+  public function setDefaultValue($default_value) {
+    $this->defaultValue = $default_value;
+    return $this;
+  }
+
+  public function getDefaultValue() {
+    return $this->defaultValue;
+  }
+
+  abstract public function getType();
+
+  abstract public function getValueFromStorageValueList(array $list);
+  abstract public function getValueFromStorageValue($value);
+  abstract public function getDisplayValueFromValue($value);
+  abstract public function getStorageValueFromValue($value);
+
+  public function getStorageValueFromStringValue($value) {
+    throw new Exception(
+      pht(
+        'This configuration option ("%s") does not support runtime definition '.
+        'with "--config".',
+        $this->getKey()));
+  }
+
+  protected function getStorageValueFromSourceValue(
+    ArcanistConfigurationSourceValue $source_value) {
+
+    $value = $source_value->getValue();
+    $source = $source_value->getConfigurationSource();
+
+    if ($source->isStringSource()) {
+      $value = $this->getStorageValueFromStringValue($value);
+    }
+
+    return $value;
+  }
+
+  public function writeValue(ArcanistConfigurationSource $source, $value) {
+    $value = $this->getStorageValueFromValue($value);
+    $source->setStorageValueForKey($this->getKey(), $value);
+  }
+
+}
diff --git a/src/config/option/ArcanistListConfigOption.php b/src/config/option/ArcanistListConfigOption.php
new file mode 100644
index 00000000..f8d5edf0
--- /dev/null
+++ b/src/config/option/ArcanistListConfigOption.php
@@ -0,0 +1,32 @@
+<?php
+
+abstract class ArcanistListConfigOption
+  extends ArcanistConfigOption {
+
+  public function getValueFromStorageValueList(array $list) {
+    assert_instances_of($list, 'ArcanistConfigurationSourceValue');
+
+    $result_list = array();
+    foreach ($list as $source_value) {
+      $source = $source_value->getConfigurationSource();
+      $storage_value = $this->getStorageValueFromSourceValue($source_value);
+
+      $items = $this->getValueFromStorageValue($storage_value);
+      foreach ($items as $item) {
+        $result_list[] = new ArcanistConfigurationSourceValue(
+          $source,
+          $item);
+      }
+    }
+
+    $result_list = $this->didReadStorageValueList($result_list);
+
+    return $result_list;
+  }
+
+  protected function didReadStorageValueList(array $list) {
+    assert_instances_of($list, 'ArcanistConfigurationSourceValue');
+    return mpull($list, 'getValue');
+  }
+
+}
diff --git a/src/config/option/ArcanistScalarConfigOption.php b/src/config/option/ArcanistScalarConfigOption.php
new file mode 100644
index 00000000..9ccda1e6
--- /dev/null
+++ b/src/config/option/ArcanistScalarConfigOption.php
@@ -0,0 +1,19 @@
+<?php
+
+abstract class ArcanistScalarConfigOption
+  extends ArcanistConfigOption {
+
+  public function getValueFromStorageValueList(array $list) {
+    assert_instances_of($list, 'ArcanistConfigurationSourceValue');
+
+    $source_value = last($list);
+    $storage_value = $this->getStorageValueFromSourceValue($source_value);
+
+    return $this->getValueFromStorageValue($storage_value);
+  }
+
+  public function getValueFromStorageValue($value) {
+    return $value;
+  }
+
+}
diff --git a/src/config/option/ArcanistStringConfigOption.php b/src/config/option/ArcanistStringConfigOption.php
new file mode 100644
index 00000000..a6da4627
--- /dev/null
+++ b/src/config/option/ArcanistStringConfigOption.php
@@ -0,0 +1,22 @@
+<?php
+
+final class ArcanistStringConfigOption
+  extends ArcanistScalarConfigOption {
+
+  public function getType() {
+    return 'string';
+  }
+
+  public function getStorageValueFromStringValue($value) {
+    return (string)$value;
+  }
+
+  public function getDisplayValueFromValue($value) {
+    return $value;
+  }
+
+  public function getStorageValueFromValue($value) {
+    return $value;
+  }
+
+}
diff --git a/src/config/option/ArcanistWildConfigOption.php b/src/config/option/ArcanistWildConfigOption.php
new file mode 100644
index 00000000..91e974e6
--- /dev/null
+++ b/src/config/option/ArcanistWildConfigOption.php
@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * This option type makes it easier to manage unknown options with unknown
+ * types.
+ */
+final class ArcanistWildConfigOption
+  extends ArcanistConfigOption {
+
+  public function getType() {
+    return 'wild';
+  }
+
+  public function getStorageValueFromStringValue($value) {
+    return (string)$value;
+  }
+
+  public function getDisplayValueFromValue($value) {
+    return json_encode($value);
+  }
+
+  public function getValueFromStorageValueList(array $list) {
+    assert_instances_of($list, 'ArcanistConfigurationSourceValue');
+
+    $source_value = last($list);
+    $storage_value = $this->getStorageValueFromSourceValue($source_value);
+
+    return $this->getValueFromStorageValue($storage_value);
+  }
+
+  public function getValueFromStorageValue($value) {
+    return $value;
+  }
+
+  public function getStorageValueFromValue($value) {
+    return $value;
+  }
+
+}
diff --git a/src/config/source/ArcanistConfigurationSource.php b/src/config/source/ArcanistConfigurationSource.php
new file mode 100644
index 00000000..0ede49e1
--- /dev/null
+++ b/src/config/source/ArcanistConfigurationSource.php
@@ -0,0 +1,39 @@
+<?php
+
+abstract class ArcanistConfigurationSource
+  extends Phobject {
+
+  const SCOPE_USER = 'user';
+
+  abstract public function getSourceDisplayName();
+  abstract public function getAllKeys();
+  abstract public function hasValueForKey($key);
+  abstract public function getValueForKey($key);
+
+  public function getConfigurationSourceScope() {
+    return null;
+  }
+
+  public function isStringSource() {
+    return false;
+  }
+
+  public function isWritableConfigurationSource() {
+    return false;
+  }
+
+  public function didReadUnknownOption(ArcanistRuntime $runtime, $key) {
+
+    // TOOLSETS: Restore this warning once the new "arc" flow is in better
+    // shape.
+    return;
+
+    $runtime->getLogEngine()->writeWarning(
+      pht('UNKNOWN CONFIGURATION'),
+      pht(
+        'Ignoring unrecognized configuration option ("%s") from source: %s.',
+        $key,
+        $this->getSourceDisplayName()));
+  }
+
+}
diff --git a/src/config/source/ArcanistDefaultsConfigurationSource.php b/src/config/source/ArcanistDefaultsConfigurationSource.php
new file mode 100644
index 00000000..3052d180
--- /dev/null
+++ b/src/config/source/ArcanistDefaultsConfigurationSource.php
@@ -0,0 +1,17 @@
+<?php
+
+final class ArcanistDefaultsConfigurationSource
+  extends ArcanistDictionaryConfigurationSource {
+
+  public function getSourceDisplayName() {
+    return pht('Builtin Defaults');
+  }
+
+  public function __construct() {
+    $values = id(new ArcanistConfigurationEngine())
+      ->newDefaults();
+
+    parent::__construct($values);
+  }
+
+}
diff --git a/src/config/source/ArcanistDictionaryConfigurationSource.php b/src/config/source/ArcanistDictionaryConfigurationSource.php
new file mode 100644
index 00000000..a281ecb0
--- /dev/null
+++ b/src/config/source/ArcanistDictionaryConfigurationSource.php
@@ -0,0 +1,44 @@
+<?php
+
+abstract class ArcanistDictionaryConfigurationSource
+  extends ArcanistConfigurationSource {
+
+  private $values;
+
+  public function __construct(array $dictionary) {
+    $this->values = $dictionary;
+  }
+
+  public function getAllKeys() {
+    return array_keys($this->values);
+  }
+
+  public function hasValueForKey($key) {
+    return array_key_exists($key, $this->values);
+  }
+
+  public function getValueForKey($key) {
+    if (!$this->hasValueForKey($key)) {
+      throw new Exception(
+        pht(
+          'Configuration source ("%s") has no value for key ("%s").',
+          get_class($this),
+          $key));
+    }
+
+    return $this->values[$key];
+  }
+
+  public function setStorageValueForKey($key, $value) {
+    $this->values[$key] = $value;
+
+    $this->writeToStorage($this->values);
+
+    return $this;
+  }
+
+  protected function writeToStorage($values) {
+    throw new PhutilMethodNotImplementedException();
+  }
+
+}
diff --git a/src/config/source/ArcanistFileConfigurationSource.php b/src/config/source/ArcanistFileConfigurationSource.php
new file mode 100644
index 00000000..60c5fa28
--- /dev/null
+++ b/src/config/source/ArcanistFileConfigurationSource.php
@@ -0,0 +1,10 @@
+<?php
+
+final class ArcanistFileConfigurationSource
+  extends ArcanistFilesystemConfigurationSource {
+
+  public function getFileKindDisplayName() {
+    return pht('Config File');
+  }
+
+}
diff --git a/src/config/source/ArcanistFilesystemConfigurationSource.php b/src/config/source/ArcanistFilesystemConfigurationSource.php
new file mode 100644
index 00000000..ffcb5016
--- /dev/null
+++ b/src/config/source/ArcanistFilesystemConfigurationSource.php
@@ -0,0 +1,45 @@
+<?php
+
+abstract class ArcanistFilesystemConfigurationSource
+  extends ArcanistDictionaryConfigurationSource {
+
+  private $path;
+
+  public function __construct($path) {
+    $this->path = $path;
+
+    $values = array();
+    if (Filesystem::pathExists($path)) {
+      $contents = Filesystem::readFile($path);
+      if (strlen(trim($contents))) {
+        $values = phutil_json_decode($contents);
+      }
+    }
+
+    $values = $this->didReadFilesystemValues($values);
+
+    parent::__construct($values);
+  }
+
+  public function getPath() {
+    return $this->path;
+  }
+
+  public function getSourceDisplayName() {
+    return pht('%s (%s)', $this->getFileKindDisplayName(), $this->getPath());
+  }
+
+  abstract public function getFileKindDisplayName();
+
+  protected function didReadFilesystemValues(array $values) {
+    return $values;
+  }
+
+  protected function writeToStorage($values) {
+    $content = id(new PhutilJSON())
+      ->encodeFormatted($values);
+
+    Filesystem::writeFile($this->path, $content);
+  }
+
+}
diff --git a/src/config/source/ArcanistLocalConfigurationSource.php b/src/config/source/ArcanistLocalConfigurationSource.php
new file mode 100644
index 00000000..f5c94944
--- /dev/null
+++ b/src/config/source/ArcanistLocalConfigurationSource.php
@@ -0,0 +1,10 @@
+<?php
+
+final class ArcanistLocalConfigurationSource
+  extends ArcanistWorkingCopyConfigurationSource {
+
+  public function getFileKindDisplayName() {
+    return pht('Local Config File');
+  }
+
+}
diff --git a/src/config/source/ArcanistProjectConfigurationSource.php b/src/config/source/ArcanistProjectConfigurationSource.php
new file mode 100644
index 00000000..a786356a
--- /dev/null
+++ b/src/config/source/ArcanistProjectConfigurationSource.php
@@ -0,0 +1,10 @@
+<?php
+
+final class ArcanistProjectConfigurationSource
+  extends ArcanistWorkingCopyConfigurationSource {
+
+  public function getFileKindDisplayName() {
+    return pht('Project Config File');
+  }
+
+}
diff --git a/src/config/source/ArcanistRuntimeConfigurationSource.php b/src/config/source/ArcanistRuntimeConfigurationSource.php
new file mode 100644
index 00000000..1b7e4e9b
--- /dev/null
+++ b/src/config/source/ArcanistRuntimeConfigurationSource.php
@@ -0,0 +1,49 @@
+<?php
+
+final class ArcanistRuntimeConfigurationSource
+  extends ArcanistDictionaryConfigurationSource {
+
+  public function __construct(array $argv) {
+    $map = array();
+    foreach ($argv as $raw) {
+      $parts = explode('=', $raw, 2);
+      if (count($parts) !== 2) {
+        throw new PhutilArgumentUsageException(
+          pht(
+            'Configuration option "%s" is not valid. Configuration options '.
+            'passed with command line flags must be in the form "name=value".',
+            $raw));
+      }
+
+      list($key, $value) = $parts;
+      if (isset($map[$key])) {
+        throw new PhutilArgumentUsageException(
+          pht(
+            'Configuration option "%s" was provided multiple times with '.
+            '"--config" flags. Specify each option no more than once.',
+            $key));
+      }
+
+      $map[$key] = $value;
+    }
+
+    parent::__construct($map);
+  }
+
+  public function didReadUnknownOption(ArcanistRuntime $runtime, $key) {
+    throw new PhutilArgumentUsageException(
+      pht(
+        'Configuration option ("%s") specified with "--config" flag is not '.
+        'a recognized option.',
+        $key));
+  }
+
+  public function getSourceDisplayName() {
+    return pht('Runtime "--config" Flags');
+  }
+
+  public function isStringSource() {
+    return true;
+  }
+
+}
diff --git a/src/config/source/ArcanistSystemConfigurationSource.php b/src/config/source/ArcanistSystemConfigurationSource.php
new file mode 100644
index 00000000..676a0f3f
--- /dev/null
+++ b/src/config/source/ArcanistSystemConfigurationSource.php
@@ -0,0 +1,10 @@
+<?php
+
+final class ArcanistSystemConfigurationSource
+  extends ArcanistFilesystemConfigurationSource {
+
+  public function getFileKindDisplayName() {
+    return pht('System Config File');
+  }
+
+}
diff --git a/src/config/source/ArcanistUserConfigurationSource.php b/src/config/source/ArcanistUserConfigurationSource.php
new file mode 100644
index 00000000..c2c0c437
--- /dev/null
+++ b/src/config/source/ArcanistUserConfigurationSource.php
@@ -0,0 +1,56 @@
+<?php
+
+final class ArcanistUserConfigurationSource
+  extends ArcanistFilesystemConfigurationSource {
+
+  public function getFileKindDisplayName() {
+    return pht('User Config File');
+  }
+
+  public function isWritableConfigurationSource() {
+    return true;
+  }
+
+  public function getConfigurationSourceScope() {
+    return ArcanistConfigurationSource::SCOPE_USER;
+  }
+
+  protected function didReadFilesystemValues(array $values) {
+    // Before toolsets, the "~/.arcrc" file had separate top-level keys for
+    // "config", "hosts", and "aliases". Transform this older file format into
+    // a more modern format.
+
+    if (!isset($values['config'])) {
+      // This isn't an older file, so just return the values unmodified.
+      return $values;
+    }
+
+    // Make the keys in "config" top-level keys. Then add in whatever other
+    // top level keys exist, other than "config", preferring keys that already
+    // exist in the "config" dictionary.
+
+    // For example, this older configuration file:
+    //
+    //  {
+    //     "hosts": ...,
+    //     "config": {x: ..., y: ...},
+    //     "aliases": ...
+    //   }
+    //
+    // ...becomes this modern file:
+    //
+    //  {
+    //    "x": ...,
+    //    "y": ...,
+    //    "hosts": ...,
+    //    "aliases": ...
+    //  }
+
+    $result = $values['config'];
+    unset($values['config']);
+    $result += $values;
+
+    return $result;
+  }
+
+}
diff --git a/src/config/source/ArcanistWorkingCopyConfigurationSource.php b/src/config/source/ArcanistWorkingCopyConfigurationSource.php
new file mode 100644
index 00000000..d4f4b815
--- /dev/null
+++ b/src/config/source/ArcanistWorkingCopyConfigurationSource.php
@@ -0,0 +1,4 @@
+<?php
+
+abstract class ArcanistWorkingCopyConfigurationSource
+  extends ArcanistFilesystemConfigurationSource {}
diff --git a/src/log/ArcanistLogEngine.php b/src/log/ArcanistLogEngine.php
new file mode 100644
index 00000000..4b6c5fbe
--- /dev/null
+++ b/src/log/ArcanistLogEngine.php
@@ -0,0 +1,95 @@
+<?php
+
+final class ArcanistLogEngine
+  extends Phobject {
+
+  private $showTraceMessages;
+
+  public function setShowTraceMessages($show_trace_messages) {
+    $this->showTraceMessages = $show_trace_messages;
+    return $this;
+  }
+
+  public function getShowTraceMessages() {
+    return $this->showTraceMessages;
+  }
+
+  public function newMessage() {
+    return new ArcanistLogMessage();
+  }
+
+  private function writeBytes($bytes) {
+    fprintf(STDERR, '%s', $bytes);
+    return $this;
+  }
+
+  public function writeNewline() {
+    return $this->writeBytes("\n");
+  }
+
+  public function writeMessage(ArcanistLogMessage $message) {
+    $color = $message->getColor();
+
+    $this->writeBytes(
+      tsprintf(
+        "**<bg:".$color."> %s </bg>** %s\n",
+        $message->getLabel(),
+        $message->getMessage()));
+
+    return $message;
+  }
+
+  public function writeWarning($label, $message) {
+    return $this->writeMessage(
+      $this->newMessage()
+        ->setColor('yellow')
+        ->setLabel($label)
+        ->setMessage($message));
+  }
+
+  public function writeError($label, $message) {
+    return $this->writeMessage(
+      $this->newMessage()
+        ->setColor('red')
+        ->setLabel($label)
+        ->setMessage($message));
+  }
+
+  public function writeSuccess($label, $message) {
+    return $this->writeMessage(
+      $this->newMessage()
+        ->setColor('green')
+        ->setLabel($label)
+        ->setMessage($message));
+  }
+
+  public function writeStatus($label, $message) {
+    return $this->writeMessage(
+      $this->newMessage()
+        ->setColor('blue')
+        ->setLabel($label)
+        ->setMessage($message));
+  }
+
+  public function writeTrace($label, $message) {
+    $trace = $this->newMessage()
+      ->setColor('magenta')
+      ->setLabel($label)
+      ->setMessage($message);
+
+    if ($this->getShowTraceMessages()) {
+      $this->writeMessage($trace);
+    }
+
+    return $trace;
+  }
+
+  public function writeHint($label, $message) {
+    return $this->writeMessage(
+      $this->newMessage()
+        ->setColor('cyan')
+        ->setLabel($label)
+        ->setMessage($message));
+  }
+
+}
diff --git a/src/log/ArcanistLogMessage.php b/src/log/ArcanistLogMessage.php
new file mode 100644
index 00000000..66d516d3
--- /dev/null
+++ b/src/log/ArcanistLogMessage.php
@@ -0,0 +1,47 @@
+<?php
+
+final class ArcanistLogMessage
+  extends Phobject {
+
+  private $label;
+  private $message;
+  private $color;
+  private $channel;
+
+  public function setLabel($label) {
+    $this->label = $label;
+    return $this;
+  }
+
+  public function getLabel() {
+    return $this->label;
+  }
+
+  public function setColor($color) {
+    $this->color = $color;
+    return $this;
+  }
+
+  public function getColor() {
+    return $this->color;
+  }
+
+  public function setChannel($channel) {
+    $this->channel = $channel;
+    return $this;
+  }
+
+  public function getChannel() {
+    return $this->channel;
+  }
+
+  public function setMessage($message) {
+    $this->message = $message;
+    return $this;
+  }
+
+  public function getMessage() {
+    return $this->message;
+  }
+
+}
diff --git a/src/runtime/ArcanistRuntime.php b/src/runtime/ArcanistRuntime.php
new file mode 100644
index 00000000..c1b7625a
--- /dev/null
+++ b/src/runtime/ArcanistRuntime.php
@@ -0,0 +1,653 @@
+<?php
+
+final class ArcanistRuntime {
+
+  private $workflows;
+  private $logEngine;
+  private $lastInterruptTime;
+
+  private $stack = array();
+
+  public function execute(array $argv) {
+
+    try {
+      $this->checkEnvironment();
+    } catch (Exception $ex) {
+      echo "CONFIGURATION ERROR\n\n";
+      echo $ex->getMessage();
+      echo "\n\n";
+      return 1;
+    }
+
+    PhutilTranslator::getInstance()
+      ->setLocale(PhutilLocale::loadLocale('en_US'))
+      ->setTranslations(PhutilTranslation::getTranslationMapForLocale('en_US'));
+
+    $log = new ArcanistLogEngine();
+    $this->logEngine = $log;
+
+    try {
+      return $this->executeCore($argv);
+    } catch (ArcanistConduitException $ex) {
+      $log->writeError(pht('CONDUIT'), $ex->getMessage());
+    } catch (PhutilArgumentUsageException $ex) {
+      $log->writeError(pht('USAGE EXCEPTION'), $ex->getMessage());
+    } catch (ArcanistUserAbortException $ex) {
+      $log->writeError(pht('---'), $ex->getMessage());
+    }
+
+    return 1;
+  }
+
+  private function executeCore(array $argv) {
+    $log = $this->getLogEngine();
+
+    $config_args = array(
+      array(
+        'name' => 'library',
+        'param' => 'path',
+        'help' => pht('Load a library.'),
+        'repeat' => true,
+      ),
+      array(
+        'name' => 'config',
+        'param' => 'key=value',
+        'repeat' => true,
+        'help' => pht('Specify a runtime configuration value.'),
+      ),
+      array(
+        'name' => 'config-file',
+        'param' => 'path',
+        'repeat' => true,
+        'help' => pht(
+          'Load one or more configuration files. If this flag is provided, '.
+          'the system and user configuration files are ignored.'),
+      ),
+    );
+
+    $args = id(new PhutilArgumentParser($argv))
+      ->parseStandardArguments();
+
+    $is_trace = $args->getArg('trace');
+    $log->setShowTraceMessages($is_trace);
+
+    $log->writeTrace(pht('ARGV'), csprintf('%Ls', $argv));
+
+    // We're installing the signal handler after parsing "--trace" so that it
+    // can emit debugging messages. This means there's a very small window at
+    // startup where signals have no special handling, but we couldn't really
+    // route them or do anything interesting with them anyway.
+    $this->installSignalHandler();
+
+    $args->parsePartial($config_args, true);
+
+    $config_engine = $this->loadConfiguration($args);
+    $config = $config_engine->newConfigurationSourceList();
+
+    $this->loadLibraries($args, $config);
+
+    // Now that we've loaded libraries, we can validate configuration.
+    // Do this before continuing since configuration can impact other
+    // behaviors immediately and we want to catch any issues right away.
+    $config->setConfigOptions($config_engine->newConfigOptionsMap());
+    $config->validateConfiguration($this);
+
+    $toolset = $this->newToolset($argv);
+
+    $args->parsePartial($toolset->getToolsetArguments());
+
+    $workflows = $this->newWorkflows($toolset);
+    $this->workflows = $workflows;
+
+    $phutil_workflows = array();
+    foreach ($workflows as $key => $workflow) {
+      $phutil_workflows[$key] = $workflow->newPhutilWorkflow();
+
+      $workflow
+        ->setRuntime($this)
+        ->setConfigurationEngine($config_engine)
+        ->setConfigurationSourceList($config);
+    }
+
+
+    $unconsumed_argv = $args->getUnconsumedArgumentVector();
+
+    if (!$unconsumed_argv) {
+      // TOOLSETS: This means the user just ran "arc" or some other top-level
+      // toolset without any workflow argument. We should give them a summary
+      // of the toolset, a list of workflows, and a pointer to "arc help" for
+      // more details.
+
+      // A possible exception is "arc --help", which should perhaps pass
+      // through and act like "arc help".
+      throw new PhutilArgumentUsageException(pht('Choose a workflow!'));
+    }
+
+    $alias_effects = id(new ArcanistAliasEngine())
+      ->setRuntime($this)
+      ->setToolset($toolset)
+      ->setWorkflows($workflows)
+      ->setConfigurationSourceList($config)
+      ->resolveAliases($unconsumed_argv);
+
+    $result_argv = $this->applyAliasEffects($alias_effects, $unconsumed_argv);
+
+    $args->setUnconsumedArgumentVector($result_argv);
+
+    // TOOLSETS: Some day, stop falling through to the old "arc" runtime.
+
+    try {
+      return $args->parseWorkflowsFull($phutil_workflows);
+    } catch (PhutilArgumentUsageException $usage_exception) {
+      $log->writeHint(
+        pht('(::)'),
+        pht(
+          'Workflow is unrecognized by modern "arc", falling through '.
+          'to classic mode.'));
+    }
+
+    $arcanist_root = phutil_get_library_root('arcanist');
+    $arcanist_root = dirname($arcanist_root);
+    $bin = $arcanist_root.'/scripts/arcanist.php';
+
+    $err = phutil_passthru(
+      'php -f %R -- %Ls',
+      $bin,
+      array_slice($argv, 1));
+
+    return $err;
+  }
+
+
+  /**
+   * Perform some sanity checks against the possible diversity of PHP builds in
+   * the wild, like very old versions and builds that were compiled with flags
+   * that exclude core functionality.
+   */
+  private function checkEnvironment() {
+    // NOTE: We don't have phutil_is_windows() yet here.
+    $is_windows = (DIRECTORY_SEPARATOR != '/');
+
+    // We use stream_socket_pair() which is not available on Windows earlier.
+    $min_version = ($is_windows ? '5.3.0' : '5.2.3');
+    $cur_version = phpversion();
+    if (version_compare($cur_version, $min_version, '<')) {
+      $message = sprintf(
+        'You are running a version of PHP ("%s"), which is older than the '.
+        'minimum supported version ("%s"). Update PHP to continue.',
+        $cur_version,
+        $min_version);
+
+      throw new Exception($message);
+    }
+
+    if ($is_windows) {
+      $need_functions = array(
+        'curl_init'     => array('builtin-dll', 'php_curl.dll'),
+      );
+    } else {
+      $need_functions = array(
+        'curl_init'     => array(
+          'text',
+          "You need to install the cURL PHP extension, maybe with ".
+          "'apt-get install php5-curl' or 'yum install php53-curl' or ".
+          "something similar.",
+        ),
+        'json_decode'   => array('flag', '--without-json'),
+      );
+    }
+
+    $problems = array();
+
+    $config = null;
+    $show_config = false;
+    foreach ($need_functions as $fname => $resolution) {
+      if (function_exists($fname)) {
+        continue;
+      }
+
+      static $info;
+      if ($info === null) {
+        ob_start();
+        phpinfo(INFO_GENERAL);
+        $info = ob_get_clean();
+        $matches = null;
+        if (preg_match('/^Configure Command =>\s*(.*?)$/m', $info, $matches)) {
+          $config = $matches[1];
+        }
+      }
+
+      list($what, $which) = $resolution;
+
+      if ($what == 'flag' && strpos($config, $which) !== false) {
+        $show_config = true;
+        $problems[] = sprintf(
+          'The build of PHP you are running was compiled with the configure '.
+          'flag "%s", which means it does not support the function "%s()". '.
+          'This function is required for Arcanist to run. Install a standard '.
+          'build of PHP or rebuild it without this flag. You may also be '.
+          'able to build or install the relevant extension separately.',
+          $which,
+          $fname);
+        continue;
+      }
+
+      if ($what == 'builtin-dll') {
+        $problems[] = sprintf(
+          'The build of PHP you are running does not have the "%s" extension '.
+          'enabled. Edit your php.ini file and uncomment the line which '.
+          'reads "extension=%s".',
+          $which,
+          $which);
+        continue;
+      }
+
+      if ($what == 'text') {
+        $problems[] = $which;
+        continue;
+      }
+
+      $problems[] = sprintf(
+        'The build of PHP you are running is missing the required function '.
+        '"%s()". Rebuild PHP or install the extension which provides "%s()".',
+        $fname,
+        $fname);
+    }
+
+    if ($problems) {
+      if ($show_config) {
+        $problems[] = "PHP was built with this configure command:\n\n{$config}";
+      }
+      $problems = implode("\n\n", $problems);
+
+      throw new Exception($problems);
+    }
+  }
+
+  private function loadConfiguration(PhutilArgumentParser $args) {
+    $engine = id(new ArcanistConfigurationEngine())
+      ->setArguments($args);
+
+    $working_copy = ArcanistWorkingCopy::newFromWorkingDirectory(getcwd());
+    if ($working_copy) {
+      $engine->setWorkingCopy($working_copy);
+    }
+
+    return $engine;
+  }
+
+  private function loadLibraries(
+    PhutilArgumentParser $args,
+    ArcanistConfigurationSourceList $config) {
+
+    // TOOLSETS: Make this work again -- or replace it entirely with package
+    // management?
+    return;
+
+    $is_trace = $args->getArg('trace');
+
+    $load = array();
+    $working_copy = $this->getWorkingCopy();
+
+    $cli_libraries = $args->getArg('library');
+    if ($cli_libraries) {
+      $load[] = array(
+        '--library',
+        $cli_libraries,
+      );
+    } else {
+      $system_config = $config->readSystemArcConfig();
+      $load[] = array(
+        $config->getSystemArcConfigLocation(),
+        idx($system_config, 'load', array()),
+      );
+
+      $global_config = $config->readUserArcConfig();
+      $load[] = array(
+        $config->getUserConfigurationFileLocation(),
+        idx($global_config, 'load', array()),
+      );
+
+      $load[] = array(
+        '.arcconfig',
+        $working_copy->getProjectConfig('load'),
+      );
+
+      $load[] = array(
+        // TODO: We could explain exactly where this is coming from more
+        // clearly.
+        './.../arc/config',
+        $working_copy->getLocalConfig('load'),
+      );
+
+      $load[] = array(
+        '--config load=...',
+        $config->getRuntimeConfig('load', array()),
+      );
+    }
+
+    foreach ($load as $spec) {
+      list($source, $libraries) = $spec;
+      if ($is_trace) {
+        $this->logTrace(
+          pht('LOAD'),
+          pht(
+            'Loading libraries from "%s"...',
+            $source));
+      }
+
+      if (!$libraries) {
+        if ($is_trace) {
+          $this->logTrace(pht('NONE'), pht('Nothing to load.'));
+        }
+        continue;
+      }
+
+      if (!is_array($libraries)) {
+        throw new PhutilArgumentUsageException(
+          pht(
+            'Libraries specified by "%s" are not formatted correctly. '.
+            'Expected a list of paths. Check your configuration.',
+            $source));
+      }
+
+      foreach ($libraries as $library) {
+        $this->loadLibrary($source, $library, $working_copy, $is_trace);
+      }
+    }
+  }
+
+  private function loadLibrary(
+    $source,
+    $location,
+    ArcanistWorkingCopyIdentity $working_copy,
+    $is_trace) {
+
+    // Try to resolve the library location. We look in several places, in
+    // order:
+    //
+    //  1. Inside the working copy. This is for phutil libraries within the
+    //     project. For instance "library/src" will resolve to
+    //     "./library/src" if it exists.
+    //  2. In the same directory as the working copy. This allows you to
+    //     check out a library alongside a working copy and reference it.
+    //     If we haven't resolved yet, "library/src" will try to resolve to
+    //     "../library/src" if it exists.
+    //  3. Using normal libphutil resolution rules. Generally, this means
+    //     that it checks for libraries next to libphutil, then libraries
+    //     in the PHP include_path.
+    //
+    // Note that absolute paths will just resolve absolutely through rule (1).
+
+    $resolved = false;
+
+    // Check inside the working copy. This also checks absolute paths, since
+    // they'll resolve absolute and just ignore the project root.
+    $resolved_location = Filesystem::resolvePath(
+      $location,
+      $working_copy->getProjectRoot());
+    if (Filesystem::pathExists($resolved_location)) {
+      $location = $resolved_location;
+      $resolved = true;
+    }
+
+    // If we didn't find anything, check alongside the working copy.
+    if (!$resolved) {
+      $resolved_location = Filesystem::resolvePath(
+        $location,
+        dirname($working_copy->getProjectRoot()));
+      if (Filesystem::pathExists($resolved_location)) {
+        $location = $resolved_location;
+        $resolved = true;
+      }
+    }
+
+    if ($is_trace) {
+      $this->logTrace(
+        pht('LOAD'),
+        pht('Loading phutil library from "%s"...', $location));
+    }
+
+    $error = null;
+    try {
+      phutil_load_library($location);
+    } catch (PhutilBootloaderException $ex) {
+      fwrite(
+        STDERR,
+        '%s',
+        tsprintf(
+          "**<bg:red> %s </bg>** %s\n",
+          pht(
+            'Failed to load phutil library at location "%s". This library '.
+            'is specified by "%s". Check that the setting is correct and '.
+            'the library is located in the right place.',
+            $location,
+            $source)));
+
+      $prompt = pht('Continue without loading library?');
+      if (!phutil_console_confirm($prompt)) {
+        throw $ex;
+      }
+    } catch (PhutilLibraryConflictException $ex) {
+      if ($ex->getLibrary() != 'arcanist') {
+        throw $ex;
+      }
+
+      // NOTE: If you are running `arc` against itself, we ignore the library
+      // conflict created by loading the local `arc` library (in the current
+      // working directory) and continue without loading it.
+
+      // This means we only execute code in the `arcanist/` directory which is
+      // associated with the binary you are running, whereas we would normally
+      // execute local code.
+
+      // This can make `arc` development slightly confusing if your setup is
+      // especially bizarre, but it allows `arc` to be used in automation
+      // workflows more easily. For some context, see PHI13.
+
+      $executing_directory = dirname(dirname(__FILE__));
+      $working_directory = dirname($location);
+
+      fwrite(
+        STDERR,
+        tsprintf(
+          "**<bg:yellow> %s </bg>** %s\n",
+          pht('VERY META'),
+          pht(
+            'You are running one copy of Arcanist (at path "%s") against '.
+            'another copy of Arcanist (at path "%s"). Code in the current '.
+            'working directory will not be loaded or executed.',
+            $executing_directory,
+            $working_directory)));
+    }
+  }
+
+  private function newToolset(array $argv) {
+    $binary = basename($argv[0]);
+
+    $toolsets = ArcanistToolset::newToolsetMap();
+    if (!isset($toolsets[$binary])) {
+      throw new PhutilArgumentUsageException(
+        pht(
+          'Arcanist toolset "%s" is unknown. The Arcanist binary should '.
+          'be executed so that "argv[0]" identifies a supported toolset. '.
+          'Rename the binary or install the library that provides the '.
+          'desired toolset. Current available toolsets: %s.',
+          $binary,
+          implode(', ', array_keys($toolsets))));
+    }
+
+    return $toolsets[$binary];
+  }
+
+  private function newWorkflows(ArcanistToolset $toolset) {
+    $workflows = id(new PhutilClassMapQuery())
+      ->setAncestorClass('ArcanistWorkflow')
+      ->execute();
+
+    foreach ($workflows as $key => $workflow) {
+      if (!$workflow->supportsToolset($toolset)) {
+        unset($workflows[$key]);
+      }
+    }
+
+    $map = array();
+    foreach ($workflows as $workflow) {
+      $key = $workflow->getWorkflowName();
+      if (isset($map[$key])) {
+        throw new Exception(
+          pht(
+            'Two workflows ("%s" and "%s") both have the same name ("%s") '.
+            'and both support the current toolset ("%s", "%s"). Each '.
+            'workflow in a given toolset must have a unique name.',
+            get_class($workflow),
+            get_class($map[$key]),
+            get_class($toolset),
+            $toolset->getToolsetKey()));
+      }
+      $map[$key] = id(clone $workflow)
+        ->setToolset($toolset);
+    }
+
+    return $map;
+  }
+
+  public function getWorkflows() {
+    return $this->workflows;
+  }
+
+  public function getLogEngine() {
+    return $this->logEngine;
+  }
+
+  private function applyAliasEffects(array $effects, array $argv) {
+    assert_instances_of($effects, 'ArcanistAliasEffect');
+
+    $log = $this->getLogEngine();
+
+    $command = null;
+    $arguments = null;
+    foreach ($effects as $effect) {
+      $message = $effect->getMessage();
+
+      if ($message !== null) {
+        $log->writeInfo(pht('ALIAS'), $message);
+      }
+
+      if ($effect->getCommand()) {
+        $command = $effect->getCommand();
+        $arguments = $effect->getArguments();
+      }
+    }
+
+    if ($command !== null) {
+      $argv = array_merge(array($command), $arguments);
+    }
+
+    return $argv;
+  }
+
+  private function installSignalHandler() {
+    $log = $this->getLogEngine();
+
+    if (!function_exists('pcntl_signal')) {
+      $log->writeTrace(
+        pht('PCNTL'),
+        pht(
+          'Unable to install signal handler, pcntl_signal() unavailable. '.
+          'Continuing without signal handling.'));
+      return;
+    }
+
+    // NOTE: SIGHUP, SIGTERM and SIGWINCH are handled by "PhutilSignalRouter".
+    // This logic is largely similar to the logic there, but more specific to
+    // Arcanist workflows.
+
+    pcntl_signal(SIGINT, array($this, 'routeSignal'));
+  }
+
+  public function routeSignal($signo) {
+    switch ($signo) {
+      case SIGINT:
+        $this->routeInterruptSignal($signo);
+        break;
+    }
+  }
+
+  private function routeInterruptSignal($signo) {
+    $log = $this->getLogEngine();
+
+    $last_interrupt = $this->lastInterruptTime;
+    $now = microtime(true);
+    $this->lastInterruptTime = $now;
+
+    $should_exit = false;
+
+    // If we received another SIGINT recently, always exit. This implements
+    // "press ^C twice in quick succession to exit" regardless of what the
+    // workflow may decide to do.
+    $interval = 2;
+    if ($last_interrupt !== null) {
+      if ($now - $last_interrupt < $interval) {
+        $should_exit = true;
+      }
+    }
+
+    $handler = null;
+    if (!$should_exit) {
+
+      // Look for an interrupt handler in the current workflow stack.
+
+      $stack = $this->getWorkflowStack();
+      foreach ($stack as $workflow) {
+        if ($workflow->canHandleSignal($signo)) {
+          $handler = $workflow;
+          break;
+        }
+      }
+
+      // If no workflow in the current execution stack can handle an interrupt
+      // signal, just exit on the first interrupt.
+
+      if (!$handler) {
+        $should_exit = true;
+      }
+    }
+
+    // It's common for users to ^C on prompts. Write a newline before writing
+    // a response to the interrupt so the behavior is a little cleaner. This
+    // also avoids lines that read "^C [ INTERRUPT ] ...".
+    $log->writeNewline();
+
+    if ($should_exit) {
+      $log->writeHint(
+        pht('INTERRUPT'),
+        pht('Interrupted by SIGINT (^C).'));
+      exit(128 + $signo);
+    }
+
+    $log->writeHint(
+      pht('INTERRUPT'),
+      pht('Press ^C again to exit.'));
+
+    $handler->handleSignal($signo);
+  }
+
+  public function pushWorkflow(ArcanistWorkflow $workflow) {
+    $this->stack[] = $workflow;
+    return $this;
+  }
+
+  public function popWorkflow() {
+    if (!$this->stack) {
+      throw new Exception(pht('Trying to pop an empty workflow stack!'));
+    }
+
+    return array_pop($this->stack);
+  }
+
+  public function getWorkflowStack() {
+    return $this->stack;
+  }
+
+}
diff --git a/src/toolset/ArcanistAlias.php b/src/toolset/ArcanistAlias.php
new file mode 100644
index 00000000..4dcabc04
--- /dev/null
+++ b/src/toolset/ArcanistAlias.php
@@ -0,0 +1,144 @@
+<?php
+
+final class ArcanistAlias extends Phobject {
+
+  private $toolset;
+  private $trigger;
+  private $command;
+  private $exception;
+  private $configurationSource;
+
+  public static function newFromConfig($key, $value) {
+    $alias = new self();
+
+    // Parse older style aliases which were always for the "arc" toolset.
+    // When we next write these back into the config file, we'll update them
+    // to the modern format.
+
+    // The old format looked like this:
+    //
+    //   {
+    //     "draft": ["diff", "--draft"]
+    //   }
+    //
+    // The new format looks like this:
+    //
+    //   {
+    //     [
+    //       "toolset": "arc",
+    //       "trigger": "draft",
+    //       "command": ["diff", "--draft"]
+    //     ]
+    //   }
+    //
+    // For now, we parse the older format and fill in the toolset as "arc".
+
+    $is_list = false;
+    $is_dict = false;
+    if ($value && is_array($value)) {
+      if (array_keys($value) === range(0, count($value) - 1)) {
+        $is_list = true;
+      } else {
+        $is_dict = true;
+      }
+    }
+
+    if ($is_list) {
+      $alias->trigger = $key;
+      $alias->toolset = 'arc';
+      $alias->command = $value;
+    } else if ($is_dict) {
+      try {
+        PhutilTypeSpec::checkMap(
+          $value,
+          array(
+            'trigger' => 'string',
+            'toolset' => 'string',
+            'command' => 'list<string>',
+          ));
+
+        $alias->trigger = idx($value, 'trigger');
+        $alias->toolset = idx($value, 'toolset');
+        $alias->command = idx($value, 'command');
+      } catch (PhutilTypeCheckException $ex) {
+        $alias->exception = new PhutilProxyException(
+          pht(
+            'Found invalid alias definition (with key "%s").',
+            $key),
+          $ex);
+      }
+    } else {
+      $alias->exception = new Exception(
+        pht(
+          'Expected alias definition (with key "%s") to be a dictionary.',
+          $key));
+    }
+
+    return $alias;
+  }
+
+  public function setToolset($toolset) {
+    $this->toolset = $toolset;
+    return $this;
+  }
+
+  public function getToolset() {
+    return $this->toolset;
+  }
+
+  public function setTrigger($trigger) {
+    $this->trigger = $trigger;
+    return $this;
+  }
+
+  public function getTrigger() {
+    return $this->trigger;
+  }
+
+  public function setCommand(array $command) {
+    $this->command = $command;
+    return $this;
+  }
+
+  public function getCommand() {
+    return $this->command;
+  }
+
+  public function setException(Exception $exception) {
+    $this->exception = $exception;
+    return $this;
+  }
+
+  public function getException() {
+    return $this->exception;
+  }
+
+  public function isShellCommandAlias() {
+    $command = $this->getCommand();
+    if (!$command) {
+      return false;
+    }
+
+    $head = head($command);
+    return preg_match('/^!/', $head);
+  }
+
+  public function getStorageDictionary() {
+    return array(
+      'trigger' => $this->getTrigger(),
+      'toolset' => $this->getToolset(),
+      'command' => $this->getCommand(),
+    );
+  }
+
+  public function setConfigurationSource(
+    ArcanistConfigurationSource $configuration_source) {
+    $this->configurationSource = $configuration_source;
+    return $this;
+  }
+
+  public function getConfigurationSource() {
+    return $this->configurationSource;
+  }
+
+}
diff --git a/src/toolset/ArcanistAliasEffect.php b/src/toolset/ArcanistAliasEffect.php
new file mode 100644
index 00000000..0e7b200b
--- /dev/null
+++ b/src/toolset/ArcanistAliasEffect.php
@@ -0,0 +1,57 @@
+<?php
+
+final class ArcanistAliasEffect
+  extends Phobject {
+
+  private $type;
+  private $command;
+  private $arguments;
+  private $message;
+
+  const EFFECT_MISCONFIGURATION = 'misconfiguration';
+  const EFFECT_SHELL = 'shell';
+  const EFFECT_RESOLUTION = 'resolution';
+  const EFFECT_SUGGEST = 'suggest';
+  const EFFECT_OVERRIDDE = 'override';
+  const EFFECT_ALIAS = 'alias';
+  const EFFECT_NOTFOUND = 'not-found';
+  const EFFECT_CYCLE = 'cycle';
+  const EFFECT_STACK = 'stack';
+
+  public function setType($type) {
+    $this->type = $type;
+    return $this;
+  }
+
+  public function getType() {
+    return $this->type;
+  }
+
+  public function setCommand($command) {
+    $this->command = $command;
+    return $this;
+  }
+
+  public function getCommand() {
+    return $this->command;
+  }
+
+  public function setArguments(array $arguments) {
+    $this->arguments = $arguments;
+    return $this;
+  }
+
+  public function getArguments() {
+    return $this->arguments;
+  }
+
+  public function setMessage($message) {
+    $this->message = $message;
+    return $this;
+  }
+
+  public function getMessage() {
+    return $this->message;
+  }
+
+}
diff --git a/src/toolset/ArcanistAliasEngine.php b/src/toolset/ArcanistAliasEngine.php
new file mode 100644
index 00000000..bc3c1801
--- /dev/null
+++ b/src/toolset/ArcanistAliasEngine.php
@@ -0,0 +1,254 @@
+<?php
+
+final class ArcanistAliasEngine
+  extends Phobject {
+
+  private $runtime;
+  private $toolset;
+  private $workflows;
+  private $configurationSourceList;
+
+  public function setRuntime(ArcanistRuntime $runtime) {
+    $this->runtime = $runtime;
+    return $this;
+  }
+
+  public function getRuntime() {
+    return $this->runtime;
+  }
+
+  public function setToolset(ArcanistToolset $toolset) {
+    $this->toolset = $toolset;
+    return $this;
+  }
+
+  public function getToolset() {
+    return $this->toolset;
+  }
+
+  public function setWorkflows(array $workflows) {
+    assert_instances_of($workflows, 'ArcanistWorkflow');
+    $this->workflows = $workflows;
+    return $this;
+  }
+
+  public function getWorkflows() {
+    return $this->workflows;
+  }
+
+  public function setConfigurationSourceList(
+    ArcanistConfigurationSourceList $config) {
+    $this->configurationSourceList = $config;
+    return $this;
+  }
+
+  public function getConfigurationSourceList() {
+    return $this->configurationSourceList;
+  }
+
+  public function resolveAliases(array $argv) {
+    $aliases_key = ArcanistArcConfigurationEngineExtension::KEY_ALIASES;
+    $source_list = $this->getConfigurationSourceList();
+    $aliases = $source_list->getConfig($aliases_key);
+
+    $results = array();
+
+    // Identify aliases which had some kind of format or specification issue
+    // when loading config. We could possibly do this earlier, but it's nice
+    // to handle all the alias stuff in one place.
+
+    foreach ($aliases as $key => $alias) {
+      $exception = $alias->getException();
+
+      if (!$exception) {
+        continue;
+      }
+
+      // This alias is not defined properly, so we're going to ignore it.
+      unset($aliases[$key]);
+
+      $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_CONFIGURATION)
+        ->setMessage(
+          pht(
+            'Configuration source ("%s") defines an invalid alias, which '.
+            'will be ignored: %s',
+            $alias->getConfigurationSource()->getSourceDisplayName()),
+            $exception->getMessage());
+    }
+
+    $command = array_shift($argv);
+
+    $stack = array();
+    return $this->resolveAliasesForCommand(
+      $aliases,
+      $command,
+      $argv,
+      $results,
+      $stack);
+  }
+
+  private function resolveAliasesForCommand(
+    array $aliases,
+    $command,
+    array $argv,
+    array $results,
+    array $stack) {
+
+    $toolset = $this->getToolset();
+    $toolset_key = $toolset->getToolsetKey();
+
+    // If we have a command which resolves to a real workflow, match it and
+    // finish resolution. You can not overwrite a real workflow with an alias.
+
+    $workflows = $this->getWorkflows();
+    if (isset($workflows[$command])) {
+      $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_RESOLUTION)
+        ->setCommand($command)
+        ->setArguments($argv);
+      return $results;
+    }
+
+    // Find all the aliases which match whatever the user typed, like "draft".
+    // We look for aliases in other toolsets, too, so we can provide the user
+    // a hint when they type "phage draft" and mean "arc draft".
+
+    $matches = array();
+    $toolset_matches = array();
+    foreach ($aliases as $alias) {
+      if ($alias->getTrigger() === $command) {
+        $matches[] = $alias;
+        if ($alias->getToolset() == $toolset_key) {
+          $toolset_matches[] = $alias;
+        }
+      }
+    }
+
+    if (!$toolset_matches) {
+
+      // If the user typed "phage draft" and meant "arc draft", give them a
+      // hint that the alias exists somewhere else and they may have specified
+      // the wrong toolset.
+
+      foreach ($matches as $match) {
+        $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_SUGGEST)
+          ->setMessage(
+            pht(
+              'No "%s %s" alias is defined, did you mean "%s %s"?',
+              $toolset_key,
+              $command,
+              $match->getToolset(),
+              $command));
+      }
+
+      // If the user misspells a command (like "arc hlep") and it doesn't match
+      // anything (no alias or workflow), we want to pass it through unmodified
+      // and let the parser try to correct the spelling into a real workflow
+      // later on.
+
+      // However, if the user correctly types a command (like "arc draft") that
+      // resolves at least once (so it hits a valid alias) but does not
+      // ultimately resolve into a valid workflow, we want to treat this as a
+      // hard failure.
+
+      // This could happen if you manually defined a bad alias, or a workflow
+      // you'd previously aliased to was removed, or you stacked aliases and
+      // then deleted one.
+
+      if ($stack) {
+        $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_NOTFOUND)
+          ->setMessage(
+            pht(
+              'Alias resolved to "%s", but this is not a valid workflow or '.
+              'alias name. This alias or workflow might have previously '.
+              'existed and been removed.',
+              $command));
+      } else {
+        $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_RESOLUTION)
+          ->setCommand($command)
+          ->setArguments($argv);
+      }
+
+      return $results;
+    }
+
+    $alias = array_pop($toolset_matches);
+    foreach ($toolset_matches as $ignored_match) {
+      $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_IGNORED)
+        ->setMessage(
+          pht(
+            'Multiple configuration sources define an alias for "%s %s". '.
+            'The definition in "%s" will be ignored.',
+            $toolset_key,
+            $command,
+            $ignored_match->getConfigurationSource()->getSourceDisplayName()));
+    }
+
+    if ($alias->isShellCommandAlias()) {
+      $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_SHELL)
+        ->setMessage(
+          pht(
+            '%s %s -> $ %s',
+            $toolset_key,
+            $command,
+            $alias->getShellCommand()))
+        ->setCommand($command)
+        ->setArgv($argv);
+      return $results;
+    }
+
+    $alias_argv = $alias->getCommand();
+    $alias_command = array_shift($alias_argv);
+
+    if (isset($stack[$alias_command])) {
+
+      $cycle = array_keys($stack);
+      $cycle[] = $alias_command;
+      $cycle = implode(' -> ', $cycle);
+
+      $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_CYCLE)
+        ->setMessage(
+          pht(
+            'Alias definitions form a cycle which can not be resolved: %s.',
+            $cycle));
+
+      return $results;
+    }
+
+    $stack[$alias_command] = true;
+
+    $stack_limit = 16;
+    if (count($stack) >= $stack_limit) {
+      $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_STACK)
+        ->setMessage(
+          pht(
+            'Alias definitions form an unreasonably deep stack. A chain of '.
+            'aliases may not resolve more than %s times.',
+            new PhutilNumber($stack_limit)));
+      return $results;
+    }
+
+    $results[] = $this->newEffect(ArcanistAliasEffect::EFFECT_ALIAS)
+      ->setMessage(
+        pht(
+          '%s %s -> %s %s',
+          $toolset_key,
+          $command,
+          $toolset_key,
+          $alias_command));
+
+    $argv = array_merge($alias_argv, $argv);
+
+    return $this->resolveAliasesForCommand(
+      $aliases,
+      $alias_command,
+      $argv,
+      $results,
+      $stack);
+  }
+
+  protected function newEffect($effect_type) {
+    return id(new ArcanistAliasEffect())
+      ->setType($effect_type);
+  }
+
+}
diff --git a/src/toolset/ArcanistArcToolset.php b/src/toolset/ArcanistArcToolset.php
new file mode 100644
index 00000000..fb3ceff4
--- /dev/null
+++ b/src/toolset/ArcanistArcToolset.php
@@ -0,0 +1,26 @@
+<?php
+
+final class ArcanistArcToolset extends ArcanistToolset {
+
+  const TOOLSETKEY = 'arc';
+
+  public function getToolsetArguments() {
+    return array(
+      array(
+        'name' => 'conduit-uri',
+        'param' => 'uri',
+        'help' => pht('Connect to Phabricator install specified by __uri__.'),
+      ),
+      array(
+        'name' => 'conduit-token',
+        'param' => 'token',
+        'help' => pht('Use a specific authentication token.'),
+      ),
+      array(
+        'name' => 'anonymous',
+        'help' => pht('Run workflow as a public user, without authenticating.'),
+      ),
+    );
+  }
+
+}
diff --git a/src/toolset/ArcanistPhageToolset.php b/src/toolset/ArcanistPhageToolset.php
new file mode 100644
index 00000000..b6ecf13e
--- /dev/null
+++ b/src/toolset/ArcanistPhageToolset.php
@@ -0,0 +1,8 @@
+<?php
+
+final class ArcanistPhageToolset extends ArcanistToolset {
+
+  const TOOLSETKEY = 'phage';
+
+
+}
diff --git a/src/toolset/ArcanistPhutilWorkflow.php b/src/toolset/ArcanistPhutilWorkflow.php
new file mode 100644
index 00000000..79fab5b9
--- /dev/null
+++ b/src/toolset/ArcanistPhutilWorkflow.php
@@ -0,0 +1,24 @@
+<?php
+
+final class ArcanistPhutilWorkflow extends PhutilArgumentWorkflow {
+
+  private $workflow;
+
+  public function setWorkflow(ArcanistWorkflow $workflow) {
+    $this->workflow = $workflow;
+    return $this;
+  }
+
+  public function getWorkflow() {
+    return $this->workflow;
+  }
+
+  public function isExecutable() {
+    return true;
+  }
+
+  public function execute(PhutilArgumentParser $args) {
+    return $this->getWorkflow()->executeWorkflow($args);
+  }
+
+}
diff --git a/src/toolset/ArcanistPrompt.php b/src/toolset/ArcanistPrompt.php
new file mode 100644
index 00000000..8cd4a912
--- /dev/null
+++ b/src/toolset/ArcanistPrompt.php
@@ -0,0 +1,151 @@
+<?php
+
+final class ArcanistPrompt
+  extends Phobject {
+
+  private $key;
+  private $workflow;
+  private $description;
+  private $query;
+
+  public function setKey($key) {
+    $this->key = $key;
+    return $this;
+  }
+
+  public function getKey() {
+    return $this->key;
+  }
+
+  public function setWorkflow(ArcanistWorkflow $workflow) {
+    $this->workflow = $workflow;
+    return $this;
+  }
+
+  public function getWorkflow() {
+    return $this->workflow;
+  }
+
+  public function setDescription($description) {
+    $this->description = $description;
+    return $this;
+  }
+
+  public function getDescription() {
+    return $this->description;
+  }
+
+  public function setQuery($query) {
+    $this->query = $query;
+    return $this;
+  }
+
+  public function getQuery() {
+    return $this->query;
+  }
+
+  public function execute() {
+    $workflow = $this->getWorkflow();
+    if ($workflow) {
+      $workflow_ok = $workflow->hasPrompt($this->getKey());
+    } else {
+      $workflow_ok = false;
+    }
+
+    if (!$workflow_ok) {
+      throw new Exception(
+        pht(
+          'Prompt ("%s") is executing, but it is not properly bound to the '.
+          'invoking workflow. You may have called "newPrompt()" to execute a '.
+          'prompt instead of "getPrompt()". Use "newPrompt()" when defining '.
+          'prompts and "getPrompt()" when executing them.',
+          $this->getKey()));
+    }
+
+    $query = $this->getQuery();
+    if (!strlen($query)) {
+      throw new Exception(
+        pht(
+          'Prompt ("%s") has no query text!',
+          $this->getKey()));
+    }
+
+    $options = '[y/N]';
+    $default = 'N';
+
+    try {
+      phutil_console_require_tty();
+    } catch (PhutilConsoleStdinNotInteractiveException $ex) {
+      // TOOLSETS: Clean this up to provide more details to the user about how
+      // they can configure prompts to be answered.
+
+      // Throw after echoing the prompt so the user has some idea what happened.
+      echo $query."\n";
+      throw $ex;
+    }
+
+    // NOTE: We're making stdin nonblocking so that we can respond to signals
+    // immediately. If we don't, and you ^C during a prompt, the program does
+    // not handle the signal until fgets() returns.
+
+    $stdin = fopen('php://stdin', 'r');
+    if (!$stdin) {
+      throw new Exception(pht('Failed to open stdin for reading.'));
+    }
+
+    $ok = stream_set_blocking($stdin, false);
+    if (!$ok) {
+      throw new Exception(pht('Unable to set stdin nonblocking.'));
+    }
+
+    echo "\n";
+
+    $result = null;
+    while (true) {
+      echo tsprintf(
+        '**<bg:cyan> %s </bg>** %s %s ',
+        '>>>',
+        $query,
+        $options);
+
+      while (true) {
+        $read = array($stdin);
+        $write = array();
+        $except = array();
+
+        $ok = stream_select($read, $write, $except, 1);
+        if ($ok === false) {
+          throw new Exception(pht('stream_select() failed!'));
+        }
+
+        $response = fgets($stdin);
+        if (!strlen($response)) {
+          continue;
+        }
+
+        break;
+      }
+
+      $response = trim($response);
+      if (!strlen($response)) {
+        $response = $default;
+      }
+
+      if (phutil_utf8_strtolower($response) == 'y') {
+        $result = true;
+        break;
+      }
+
+      if (phutil_utf8_strtolower($response) == 'n') {
+        $result = false;
+        break;
+      }
+    }
+
+    if (!$result) {
+      throw new ArcanistUserAbortException();
+    }
+
+  }
+
+}
diff --git a/src/toolset/ArcanistToolset.php b/src/toolset/ArcanistToolset.php
new file mode 100644
index 00000000..0042762b
--- /dev/null
+++ b/src/toolset/ArcanistToolset.php
@@ -0,0 +1,22 @@
+<?php
+
+abstract class ArcanistToolset extends Phobject {
+
+  final public function getToolsetKey() {
+    return $this->getPhobjectClassConstant('TOOLSETKEY');
+  }
+
+  final public static function newToolsetMap() {
+    $toolsets = id(new PhutilClassMapQuery())
+      ->setAncestorClass(__CLASS__)
+      ->setUniqueMethod('getToolsetKey')
+      ->execute();
+
+    return $toolsets;
+  }
+
+  public function getToolsetArguments() {
+    return array();
+  }
+
+}
diff --git a/src/toolset/ArcanistWorkflowArgument.php b/src/toolset/ArcanistWorkflowArgument.php
new file mode 100644
index 00000000..0c1ab602
--- /dev/null
+++ b/src/toolset/ArcanistWorkflowArgument.php
@@ -0,0 +1,74 @@
+<?php
+
+final class ArcanistWorkflowArgument
+  extends Phobject {
+
+  private $key;
+  private $help;
+  private $wildcard;
+  private $parameter;
+  private $isPathArgument;
+
+  public function setKey($key) {
+    $this->key = $key;
+    return $this;
+  }
+
+  public function getKey() {
+    return $this->key;
+  }
+
+  public function setWildcard($wildcard) {
+    $this->wildcard = $wildcard;
+    return $this;
+  }
+
+  public function getWildcard() {
+    return $this->wildcard;
+  }
+
+  public function getPhutilSpecification() {
+    $spec = array(
+      'name' => $this->getKey(),
+    );
+
+    if ($this->getWildcard()) {
+      $spec['wildcard'] = true;
+    }
+
+    $parameter = $this->getParameter();
+    if ($parameter !== null) {
+      $spec['param'] = $parameter;
+    }
+
+    return $spec;
+  }
+
+  public function setHelp($help) {
+    $this->help = $help;
+    return $this;
+  }
+
+  public function getHelp() {
+    return $this->help;
+  }
+
+  public function setParameter($parameter) {
+    $this->parameter = $parameter;
+    return $this;
+  }
+
+  public function getParameter() {
+    return $this->parameter;
+  }
+
+  public function setIsPathArgument($is_path_argument) {
+    $this->isPathArgument = $is_path_argument;
+    return $this;
+  }
+
+  public function getIsPathArgument() {
+    return $this->isPathArgument;
+  }
+
+}
diff --git a/src/toolset/ArcanistWorkflowInformation.php b/src/toolset/ArcanistWorkflowInformation.php
new file mode 100644
index 00000000..d59d0fc1
--- /dev/null
+++ b/src/toolset/ArcanistWorkflowInformation.php
@@ -0,0 +1,27 @@
+<?php
+
+final class ArcanistWorkflowInformation
+  extends Phobject {
+
+  private $help;
+  private $examples = array();
+
+  public function setHelp($help) {
+    $this->help = $help;
+    return $this;
+  }
+
+  public function getHelp() {
+    return $this->help;
+  }
+
+  public function addExample($example) {
+    $this->examples[] = $example;
+    return $this;
+  }
+
+  public function getExamples() {
+    return $this->examples;
+  }
+
+}
diff --git a/src/workflow/ArcanistLiberateWorkflow.php b/src/workflow/ArcanistLiberateWorkflow.php
index 4c3b6097..455319be 100644
--- a/src/workflow/ArcanistLiberateWorkflow.php
+++ b/src/workflow/ArcanistLiberateWorkflow.php
@@ -1,256 +1,258 @@
 <?php
 
 /**
  * Create and update libphutil libraries.
  *
  * This workflow is unusual and involves re-executing 'arc liberate' as a
  * subprocess with `--remap` and `--verify`. This is because there is no way
  * to unload or reload a library, so every process is stuck with the library
  * definition it had when it first loaded. This is normally fine, but
  * problematic in this case because `arc liberate` modifies library definitions.
  */
 final class ArcanistLiberateWorkflow extends ArcanistWorkflow {
 
   public function getWorkflowName() {
     return 'liberate';
   }
 
   public function getCommandSynopses() {
     return phutil_console_format(<<<EOTEXT
       **liberate** [__path__]
 EOTEXT
       );
   }
 
   public function getCommandHelp() {
     return phutil_console_format(<<<EOTEXT
           Supports: libphutil
           Create or update a libphutil library, generating required metadata
           files like \__init__.php.
 EOTEXT
       );
   }
 
   public function getArguments() {
     return array(
       'all' => array(
         'help' => pht(
           'Drop the module cache before liberating. This will completely '.
           'reanalyze the entire library. Thorough, but slow!'),
       ),
       'force-update' => array(
         'help' => pht(
           'Force the library map to be updated, even in the presence of '.
           'lint errors.'),
       ),
       'library-name' => array(
         'param' => 'name',
         'help' =>
           pht('Use a flag for library name rather than awaiting user input.'),
       ),
       'remap' => array(
         'hide' => true,
         'help' => pht(
           'Internal. Run the remap step of liberation. You do not need to '.
           'run this unless you are debugging the workflow.'),
       ),
       'verify' => array(
         'hide' => true,
         'help' => pht(
           'Internal. Run the verify step of liberation. You do not need to '.
           'run this unless you are debugging the workflow.'),
       ),
       'upgrade' => array(
         'hide'  => true,
         'help'  => pht('Experimental. Upgrade library to v2.'),
       ),
       '*' => 'argv',
     );
   }
 
   public function run() {
     $argv = $this->getArgument('argv');
     if (count($argv) > 1) {
       throw new ArcanistUsageException(
         pht(
           "Provide only one path to '%s'. The path should be a directory ".
           "where you want to create or update a libphutil library.",
           'arc liberate'));
     } else if (count($argv) == 0) {
       $path = getcwd();
     } else {
       $path = reset($argv);
     }
 
     $is_remap = $this->getArgument('remap');
     $is_verify = $this->getArgument('verify');
 
     $path = Filesystem::resolvePath($path);
 
     if (Filesystem::pathExists($path) && is_dir($path)) {
       $init = id(new FileFinder($path))
         ->withPath('*/__phutil_library_init__.php')
         ->find();
     } else {
       $init = null;
     }
 
     if ($init) {
       if (count($init) > 1) {
         throw new ArcanistUsageException(
           pht(
             'Specified directory contains more than one libphutil library. '.
             'Use a more specific path.'));
       }
       $path = Filesystem::resolvePath(dirname(reset($init)), $path);
     } else {
       $found = false;
       foreach (Filesystem::walkToRoot($path) as $dir) {
         if (Filesystem::pathExists($dir.'/__phutil_library_init__.php')) {
           $path = $dir;
           $found = true;
           break;
         }
       }
       if (!$found) {
         echo pht("No library currently exists at that path...\n");
         $this->liberateCreateDirectory($path);
         $this->liberateCreateLibrary($path);
         return;
       }
     }
 
     $version = $this->getLibraryFormatVersion($path);
     switch ($version) {
       case 1:
         if ($this->getArgument('upgrade')) {
           return $this->upgradeLibrary($path);
         }
         throw new ArcanistUsageException(
           pht(
             "This library is using libphutil v1, which is no ".
             "longer supported. Run '%s' to upgrade to v2.",
             'arc liberate --upgrade'));
       case 2:
         if ($this->getArgument('upgrade')) {
           throw new ArcanistUsageException(
             pht("Can't upgrade a v2 library!"));
         }
         return $this->liberateVersion2($path);
       default:
         throw new ArcanistUsageException(
           pht("Unknown library version '%s'!", $version));
     }
+
+    echo tsprintf("%s\n", pht('Done.'));
   }
 
   private function getLibraryFormatVersion($path) {
     $map_file = $path.'/__phutil_library_map__.php';
     if (!Filesystem::pathExists($map_file)) {
       // Default to library v1.
       return 1;
     }
 
     $map = Filesystem::readFile($map_file);
 
     $matches = null;
     if (preg_match('/@phutil-library-version (\d+)/', $map, $matches)) {
       return (int)$matches[1];
     }
 
     return 1;
   }
 
   private function liberateVersion2($path) {
     $bin = $this->getScriptPath('support/lib/rebuild-map.php');
 
     $argv = array();
     if ($this->getArgument('all')) {
       $argv[] = '--drop-cache';
     }
 
     return phutil_passthru(
       'php -f %s -- %Ls %s',
       $bin,
       $argv,
       $path);
   }
 
   private function upgradeLibrary($path) {
     $inits = id(new FileFinder($path))
       ->withPath('*/__init__.php')
       ->withType('f')
       ->find();
 
     echo pht('Removing %s files...', '__init__.php')."\n";
     foreach ($inits as $init) {
       Filesystem::remove($path.'/'.$init);
     }
 
     echo pht('Upgrading library to v2...')."\n";
     $this->liberateVersion2($path);
   }
 
   private function liberateCreateDirectory($path) {
     if (Filesystem::pathExists($path)) {
       if (!is_dir($path)) {
         throw new ArcanistUsageException(
           pht(
             'Provide a directory to create or update a libphutil library in.'));
       }
       return;
     }
 
     echo pht("The directory '%s' does not exist.", $path);
     if (!phutil_console_confirm(pht('Do you want to create it?'))) {
       throw new ArcanistUsageException(pht('Canceled.'));
     }
 
     execx('mkdir -p %s', $path);
   }
 
   private function liberateCreateLibrary($path) {
     $init_path = $path.'/__phutil_library_init__.php';
     if (Filesystem::pathExists($init_path)) {
       return;
     }
 
     echo pht("Creating new libphutil library in '%s'.", $path)."\n";
 
     do {
       $name = $this->getArgument('library-name');
       if ($name === null) {
         echo pht('Choose a name for the new library.')."\n";
         $name = phutil_console_prompt(
           pht('What do you want to name this library?'));
       } else {
         echo pht('Using library name %s.', $name)."\n";
       }
       if (preg_match('/^[a-z-]+$/', $name)) {
         break;
       } else {
         echo phutil_console_format(
           "%s\n",
           pht(
           'Library name should contain only lowercase letters and hyphens.'));
       }
     } while (true);
 
     $template =
       "<?php\n\n".
       "phutil_register_library('{$name}', __FILE__);\n";
 
     echo pht(
       "Writing '%s' to '%s'...\n",
       '__phutil_library_init__.php',
       $path);
     Filesystem::writeFile($init_path, $template);
     $this->liberateVersion2($path);
   }
 
 
   private function getScriptPath($script) {
     $root = dirname(phutil_get_library_root('arcanist'));
     return $root.'/'.$script;
   }
 
 }
diff --git a/src/workflow/ArcanistWorkflow.php b/src/workflow/ArcanistWorkflow.php
index d7afc47e..13b7b692 100644
--- a/src/workflow/ArcanistWorkflow.php
+++ b/src/workflow/ArcanistWorkflow.php
@@ -1,2138 +1,2142 @@
 <?php
 
 /**
  * Implements a runnable command, like "arc diff" or "arc help".
  *
  * = Managing Conduit =
  *
  * Workflows have the builtin ability to open a Conduit connection to a
  * Phabricator installation, so methods can be invoked over the API. Workflows
  * may either not need this (e.g., "help"), or may need a Conduit but not
  * authentication (e.g., calling only public APIs), or may need a Conduit and
  * authentication (e.g., "arc diff").
  *
  * To specify that you need an //unauthenticated// conduit, override
  * @{method:requiresConduit} to return ##true##. To specify that you need an
  * //authenticated// conduit, override @{method:requiresAuthentication} to
  * return ##true##. You can also manually invoke @{method:establishConduit}
  * and/or @{method:authenticateConduit} later in a workflow to upgrade it.
  * Once a conduit is open, you can access the client by calling
  * @{method:getConduit}, which allows you to invoke methods. You can get
  * verified information about the user identity by calling @{method:getUserPHID}
  * or @{method:getUserName} after authentication occurs.
  *
  * = Scratch Files =
  *
  * Arcanist workflows can read and write 'scratch files', which are temporary
  * files stored in the project that persist across commands. They can be useful
  * if you want to save some state, or keep a copy of a long message the user
  * entered if something goes wrong.
  *
  *
  * @task  conduit   Conduit
  * @task  scratch   Scratch Files
  * @task  phabrep   Phabricator Repositories
  */
 abstract class ArcanistWorkflow extends Phobject {
 
   const COMMIT_DISABLE = 0;
   const COMMIT_ALLOW = 1;
   const COMMIT_ENABLE = 2;
 
   private $commitMode = self::COMMIT_DISABLE;
 
   private $conduit;
   private $conduitURI;
   private $conduitCredentials;
   private $conduitAuthenticated;
   private $forcedConduitVersion;
   private $conduitTimeout;
 
   private $userPHID;
   private $userName;
   private $repositoryAPI;
   private $configurationManager;
   private $arguments = array();
   private $passedArguments = array();
   private $command;
 
   private $stashed;
   private $shouldAmend;
 
   private $projectInfo;
   private $repositoryInfo;
   private $repositoryReasons;
   private $repositoryRef;
 
   private $arcanistConfiguration;
   private $parentWorkflow;
   private $workingDirectory;
   private $repositoryVersion;
 
   private $changeCache = array();
   private $conduitEngine;
 
 
   public function __construct() {}
 
 
   abstract public function run();
 
   /**
    * Finalizes any cleanup operations that need to occur regardless of
    * whether the command succeeded or failed.
    */
   public function finalize() {
     $this->finalizeWorkingCopy();
   }
 
   /**
    * Return the command used to invoke this workflow from the command like,
    * e.g. "help" for @{class:ArcanistHelpWorkflow}.
    *
    * @return string   The command a user types to invoke this workflow.
    */
   abstract public function getWorkflowName();
 
   /**
    * Return console formatted string with all command synopses.
    *
    * @return string  6-space indented list of available command synopses.
    */
   abstract public function getCommandSynopses();
 
   /**
    * Return console formatted string with command help printed in `arc help`.
    *
    * @return string  10-space indented help to use the command.
    */
   abstract public function getCommandHelp();
 
+  final public function supportsToolset($toolset) {
+    return ($toolset === 'arc');
+  }
+
 
 /* -(  Conduit  )------------------------------------------------------------ */
 
 
   /**
    * Set the URI which the workflow will open a conduit connection to when
    * @{method:establishConduit} is called. Arcanist makes an effort to set
    * this by default for all workflows (by reading ##.arcconfig## and/or the
    * value of ##--conduit-uri##) even if they don't need Conduit, so a workflow
    * can generally upgrade into a conduit workflow later by just calling
    * @{method:establishConduit}.
    *
    * You generally should not need to call this method unless you are
    * specifically overriding the default URI. It is normally sufficient to
    * just invoke @{method:establishConduit}.
    *
    * NOTE: You can not call this after a conduit has been established.
    *
    * @param string  The URI to open a conduit to when @{method:establishConduit}
    *                is called.
    * @return this
    * @task conduit
    */
   final public function setConduitURI($conduit_uri) {
     if ($this->conduit) {
       throw new Exception(
         pht(
           'You can not change the Conduit URI after a '.
           'conduit is already open.'));
     }
     $this->conduitURI = $conduit_uri;
     return $this;
   }
 
   /**
    * Returns the URI the conduit connection within the workflow uses.
    *
    * @return string
    * @task conduit
    */
   final public function getConduitURI() {
     return $this->conduitURI;
   }
 
   /**
    * Open a conduit channel to the server which was previously configured by
    * calling @{method:setConduitURI}. Arcanist will do this automatically if
    * the workflow returns ##true## from @{method:requiresConduit}, or you can
    * later upgrade a workflow and build a conduit by invoking it manually.
    *
    * You must establish a conduit before you can make conduit calls.
    *
    * NOTE: You must call @{method:setConduitURI} before you can call this
    * method.
    *
    * @return this
    * @task conduit
    */
   final public function establishConduit() {
     if ($this->conduit) {
       return $this;
     }
 
     if (!$this->conduitURI) {
       throw new Exception(
         pht(
           'You must specify a Conduit URI with %s before you can '.
           'establish a conduit.',
           'setConduitURI()'));
     }
 
     $this->conduit = new ConduitClient($this->conduitURI);
 
     if ($this->conduitTimeout) {
       $this->conduit->setTimeout($this->conduitTimeout);
     }
 
     $user = $this->getConfigFromAnySource('http.basicauth.user');
     $pass = $this->getConfigFromAnySource('http.basicauth.pass');
     if ($user !== null && $pass !== null) {
       $this->conduit->setBasicAuthCredentials($user, $pass);
     }
 
     return $this;
   }
 
   final public function getConfigFromAnySource($key) {
     return $this->configurationManager->getConfigFromAnySource($key);
   }
 
 
   /**
    * Set credentials which will be used to authenticate against Conduit. These
    * credentials can then be used to establish an authenticated connection to
    * conduit by calling @{method:authenticateConduit}. Arcanist sets some
    * defaults for all workflows regardless of whether or not they return true
    * from @{method:requireAuthentication}, based on the ##~/.arcrc## and
    * ##.arcconf## files if they are present. Thus, you can generally upgrade a
    * workflow which does not require authentication into an authenticated
    * workflow by later invoking @{method:requireAuthentication}. You should not
    * normally need to call this method unless you are specifically overriding
    * the defaults.
    *
    * NOTE: You can not call this method after calling
    * @{method:authenticateConduit}.
    *
    * @param dict  A credential dictionary, see @{method:authenticateConduit}.
    * @return this
    * @task conduit
    */
   final public function setConduitCredentials(array $credentials) {
     if ($this->isConduitAuthenticated()) {
       throw new Exception(
         pht('You may not set new credentials after authenticating conduit.'));
     }
 
     $this->conduitCredentials = $credentials;
     return $this;
   }
 
 
   /**
    * Force arc to identify with a specific Conduit version during the
    * protocol handshake. This is primarily useful for development (especially
    * for sending diffs which bump the client Conduit version), since the client
    * still actually speaks the builtin version of the protocol.
    *
    * Controlled by the --conduit-version flag.
    *
    * @param int Version the client should pretend to be.
    * @return this
    * @task conduit
    */
   final public function forceConduitVersion($version) {
     $this->forcedConduitVersion = $version;
     return $this;
   }
 
 
   /**
    * Get the protocol version the client should identify with.
    *
    * @return int Version the client should claim to be.
    * @task conduit
    */
   final public function getConduitVersion() {
     return nonempty($this->forcedConduitVersion, 6);
   }
 
 
   /**
    * Override the default timeout for Conduit.
    *
    * Controlled by the --conduit-timeout flag.
    *
    * @param float Timeout, in seconds.
    * @return this
    * @task conduit
    */
   final public function setConduitTimeout($timeout) {
     $this->conduitTimeout = $timeout;
     if ($this->conduit) {
       $this->conduit->setConduitTimeout($timeout);
     }
     return $this;
   }
 
 
   /**
    * Open and authenticate a conduit connection to a Phabricator server using
    * provided credentials. Normally, Arcanist does this for you automatically
    * when you return true from @{method:requiresAuthentication}, but you can
    * also upgrade an existing workflow to one with an authenticated conduit
    * by invoking this method manually.
    *
    * You must authenticate the conduit before you can make authenticated conduit
    * calls (almost all calls require authentication).
    *
    * This method uses credentials provided via @{method:setConduitCredentials}
    * to authenticate to the server:
    *
    *    - ##user## (required) The username to authenticate with.
    *    - ##certificate## (required) The Conduit certificate to use.
    *    - ##description## (optional) Description of the invoking command.
    *
    * Successful authentication allows you to call @{method:getUserPHID} and
    * @{method:getUserName}, as well as use the client you access with
    * @{method:getConduit} to make authenticated calls.
    *
    * NOTE: You must call @{method:setConduitURI} and
    * @{method:setConduitCredentials} before you invoke this method.
    *
    * @return this
    * @task conduit
    */
   final public function authenticateConduit() {
     if ($this->isConduitAuthenticated()) {
       return $this;
     }
 
     $this->establishConduit();
     $credentials = $this->conduitCredentials;
 
     try {
       if (!$credentials) {
         throw new Exception(
           pht(
             'Set conduit credentials with %s before authenticating conduit!',
             'setConduitCredentials()'));
       }
 
       // If we have `token`, this server supports the simpler, new-style
       // token-based authentication. Use that instead of all the certificate
       // stuff.
       $token = idx($credentials, 'token');
       if (strlen($token)) {
         $conduit = $this->getConduit();
 
         $conduit->setConduitToken($token);
 
         try {
           $result = $this->getConduit()->callMethodSynchronous(
             'user.whoami',
             array());
 
           $this->userName = $result['userName'];
           $this->userPHID = $result['phid'];
 
           $this->conduitAuthenticated = true;
 
           return $this;
         } catch (Exception $ex) {
           $conduit->setConduitToken(null);
           throw $ex;
         }
       }
 
       if (empty($credentials['user'])) {
         throw new ConduitClientException(
           'ERR-INVALID-USER',
           pht('Empty user in credentials.'));
       }
       if (empty($credentials['certificate'])) {
         throw new ConduitClientException(
           'ERR-NO-CERTIFICATE',
           pht('Empty certificate in credentials.'));
       }
 
       $description = idx($credentials, 'description', '');
       $user        = $credentials['user'];
       $certificate = $credentials['certificate'];
 
       $connection = $this->getConduit()->callMethodSynchronous(
         'conduit.connect',
         array(
           'client'              => 'arc',
           'clientVersion'       => $this->getConduitVersion(),
           'clientDescription'   => php_uname('n').':'.$description,
           'user'                => $user,
           'certificate'         => $certificate,
           'host'                => $this->conduitURI,
         ));
     } catch (ConduitClientException $ex) {
       if ($ex->getErrorCode() == 'ERR-NO-CERTIFICATE' ||
           $ex->getErrorCode() == 'ERR-INVALID-USER' ||
           $ex->getErrorCode() == 'ERR-INVALID-AUTH') {
         $conduit_uri = $this->conduitURI;
         $message = phutil_console_format(
           "\n%s\n\n    %s\n\n%s\n%s",
           pht('YOU NEED TO __INSTALL A CERTIFICATE__ TO LOGIN TO PHABRICATOR'),
           pht('To do this, run: **%s**', 'arc install-certificate'),
           pht("The server '%s' rejected your request:", $conduit_uri),
           $ex->getMessage());
         throw new ArcanistUsageException($message);
       } else if ($ex->getErrorCode() == 'NEW-ARC-VERSION') {
 
         // Cleverly disguise this as being AWESOME!!!
 
         echo phutil_console_format("**%s**\n\n", pht('New Version Available!'));
         echo phutil_console_wrap($ex->getMessage());
         echo "\n\n";
         echo pht('In most cases, arc can be upgraded automatically.')."\n";
 
         $ok = phutil_console_confirm(
           pht('Upgrade arc now?'),
           $default_no = false);
         if (!$ok) {
           throw $ex;
         }
 
         $root = dirname(phutil_get_library_root('arcanist'));
 
         chdir($root);
         $err = phutil_passthru('%s upgrade', $root.'/bin/arc');
         if (!$err) {
           echo "\n".pht('Try running your arc command again.')."\n";
         }
         exit(1);
       } else {
         throw $ex;
       }
     }
 
     $this->userName = $user;
     $this->userPHID = $connection['userPHID'];
 
     $this->conduitAuthenticated = true;
 
     return $this;
   }
 
   /**
    * @return bool True if conduit is authenticated, false otherwise.
    * @task conduit
    */
   final protected function isConduitAuthenticated() {
     return (bool)$this->conduitAuthenticated;
   }
 
 
   /**
    * Override this to return true if your workflow requires a conduit channel.
    * Arc will build the channel for you before your workflow executes. This
    * implies that you only need an unauthenticated channel; if you need
    * authentication, override @{method:requiresAuthentication}.
    *
    * @return bool True if arc should build a conduit channel before running
    *              the workflow.
    * @task conduit
    */
   public function requiresConduit() {
     return false;
   }
 
 
   /**
    * Override this to return true if your workflow requires an authenticated
    * conduit channel. This implies that it requires a conduit. Arc will build
    * and authenticate the channel for you before the workflow executes.
    *
    * @return bool True if arc should build an authenticated conduit channel
    *              before running the workflow.
    * @task conduit
    */
   public function requiresAuthentication() {
     return false;
   }
 
 
   /**
    * Returns the PHID for the user once they've authenticated via Conduit.
    *
    * @return phid Authenticated user PHID.
    * @task conduit
    */
   final public function getUserPHID() {
     if (!$this->userPHID) {
       $workflow = get_class($this);
       throw new Exception(
         pht(
           "This workflow ('%s') requires authentication, override ".
           "%s to return true.",
           $workflow,
           'requiresAuthentication()'));
     }
     return $this->userPHID;
   }
 
   /**
    * Return the username for the user once they've authenticated via Conduit.
    *
    * @return string Authenticated username.
    * @task conduit
    */
   final public function getUserName() {
     return $this->userName;
   }
 
 
   /**
    * Get the established @{class@libphutil:ConduitClient} in order to make
    * Conduit method calls. Before the client is available it must be connected,
    * either implicitly by making @{method:requireConduit} or
    * @{method:requireAuthentication} return true, or explicitly by calling
    * @{method:establishConduit} or @{method:authenticateConduit}.
    *
    * @return @{class@libphutil:ConduitClient} Live conduit client.
    * @task conduit
    */
   final public function getConduit() {
     if (!$this->conduit) {
       $workflow = get_class($this);
       throw new Exception(
         pht(
           "This workflow ('%s') requires a Conduit, override ".
           "%s to return true.",
           $workflow,
           'requiresConduit()'));
     }
     return $this->conduit;
   }
 
 
   final public function setArcanistConfiguration(
     ArcanistConfiguration $arcanist_configuration) {
 
     $this->arcanistConfiguration = $arcanist_configuration;
     return $this;
   }
 
   final public function getArcanistConfiguration() {
     return $this->arcanistConfiguration;
   }
 
   final public function setConfigurationManager(
     ArcanistConfigurationManager $arcanist_configuration_manager) {
 
     $this->configurationManager = $arcanist_configuration_manager;
     return $this;
   }
 
   final public function getConfigurationManager() {
     return $this->configurationManager;
   }
 
   public function requiresWorkingCopy() {
     return false;
   }
 
   public function desiresWorkingCopy() {
     return false;
   }
 
   public function requiresRepositoryAPI() {
     return false;
   }
 
   public function desiresRepositoryAPI() {
     return false;
   }
 
   final public function setCommand($command) {
     $this->command = $command;
     return $this;
   }
 
   final public function getCommand() {
     return $this->command;
   }
 
   public function getArguments() {
     return array();
   }
 
   final public function setWorkingDirectory($working_directory) {
     $this->workingDirectory = $working_directory;
     return $this;
   }
 
   final public function getWorkingDirectory() {
     return $this->workingDirectory;
   }
 
   final private function setParentWorkflow($parent_workflow) {
     $this->parentWorkflow = $parent_workflow;
     return $this;
   }
 
   final protected function getParentWorkflow() {
     return $this->parentWorkflow;
   }
 
   final public function buildChildWorkflow($command, array $argv) {
     $arc_config = $this->getArcanistConfiguration();
     $workflow = $arc_config->buildWorkflow($command);
     $workflow->setParentWorkflow($this);
     $workflow->setConduitEngine($this->getConduitEngine());
     $workflow->setCommand($command);
     $workflow->setConfigurationManager($this->getConfigurationManager());
 
     if ($this->repositoryAPI) {
       $workflow->setRepositoryAPI($this->repositoryAPI);
     }
 
     if ($this->userPHID) {
       $workflow->userPHID = $this->getUserPHID();
       $workflow->userName = $this->getUserName();
     }
 
     if ($this->conduit) {
       $workflow->conduit = $this->conduit;
       $workflow->setConduitCredentials($this->conduitCredentials);
       $workflow->conduitAuthenticated = $this->conduitAuthenticated;
     }
 
     $workflow->setArcanistConfiguration($arc_config);
 
     $workflow->parseArguments(array_values($argv));
 
     return $workflow;
   }
 
   final public function getArgument($key, $default = null) {
     return idx($this->arguments, $key, $default);
   }
 
   final public function getPassedArguments() {
     return $this->passedArguments;
   }
 
   final public function getCompleteArgumentSpecification() {
     $spec = $this->getArguments();
     $arc_config = $this->getArcanistConfiguration();
     $command = $this->getCommand();
     $spec += $arc_config->getCustomArgumentsForCommand($command);
 
     return $spec;
   }
 
   final public function parseArguments(array $args) {
     $this->passedArguments = $args;
 
     $spec = $this->getCompleteArgumentSpecification();
 
     $dict = array();
 
     $more_key = null;
     if (!empty($spec['*'])) {
       $more_key = $spec['*'];
       unset($spec['*']);
       $dict[$more_key] = array();
     }
 
     $short_to_long_map = array();
     foreach ($spec as $long => $options) {
       if (!empty($options['short'])) {
         $short_to_long_map[$options['short']] = $long;
       }
     }
 
     foreach ($spec as $long => $options) {
       if (!empty($options['repeat'])) {
         $dict[$long] = array();
       }
     }
 
     $more = array();
     $size = count($args);
     for ($ii = 0; $ii < $size; $ii++) {
       $arg = $args[$ii];
       $arg_name = null;
       $arg_key = null;
       if ($arg == '--') {
         $more = array_merge(
           $more,
           array_slice($args, $ii + 1));
         break;
       } else if (!strncmp($arg, '--', 2)) {
         $arg_key = substr($arg, 2);
         $parts = explode('=', $arg_key, 2);
         if (count($parts) == 2) {
           list($arg_key, $val) = $parts;
 
           array_splice($args, $ii, 1, array('--'.$arg_key, $val));
           $size++;
         }
 
         if (!array_key_exists($arg_key, $spec)) {
           $corrected = PhutilArgumentSpellingCorrector::newFlagCorrector()
             ->correctSpelling($arg_key, array_keys($spec));
           if (count($corrected) == 1) {
             PhutilConsole::getConsole()->writeErr(
               pht(
                 "(Assuming '%s' is the British spelling of '%s'.)",
                 '--'.$arg_key,
                 '--'.head($corrected))."\n");
             $arg_key = head($corrected);
           } else {
             throw new ArcanistUsageException(
               pht(
                 "Unknown argument '%s'. Try '%s'.",
                 $arg_key,
                 'arc help'));
           }
         }
       } else if (!strncmp($arg, '-', 1)) {
         $arg_key = substr($arg, 1);
         if (empty($short_to_long_map[$arg_key])) {
           throw new ArcanistUsageException(
             pht(
               "Unknown argument '%s'. Try '%s'.",
               $arg_key,
               'arc help'));
         }
         $arg_key = $short_to_long_map[$arg_key];
       } else {
         $more[] = $arg;
         continue;
       }
 
       $options = $spec[$arg_key];
       if (empty($options['param'])) {
         $dict[$arg_key] = true;
       } else {
         if ($ii == $size - 1) {
           throw new ArcanistUsageException(
             pht(
               "Option '%s' requires a parameter.",
               $arg));
         }
         if (!empty($options['repeat'])) {
           $dict[$arg_key][] = $args[$ii + 1];
         } else {
           $dict[$arg_key] = $args[$ii + 1];
         }
         $ii++;
       }
     }
 
     if ($more) {
       if ($more_key) {
         $dict[$more_key] = $more;
       } else {
         $example = reset($more);
         throw new ArcanistUsageException(
           pht(
             "Unrecognized argument '%s'. Try '%s'.",
             $example,
             'arc help'));
       }
     }
 
     foreach ($dict as $key => $value) {
       if (empty($spec[$key]['conflicts'])) {
         continue;
       }
       foreach ($spec[$key]['conflicts'] as $conflict => $more) {
         if (isset($dict[$conflict])) {
           if ($more) {
             $more = ': '.$more;
           } else {
             $more = '.';
           }
           // TODO: We'll always display these as long-form, when the user might
           // have typed them as short form.
           throw new ArcanistUsageException(
             pht(
               "Arguments '%s' and '%s' are mutually exclusive",
               "--{$key}",
               "--{$conflict}").$more);
         }
       }
     }
 
     $this->arguments = $dict;
 
     $this->didParseArguments();
 
     return $this;
   }
 
   protected function didParseArguments() {
     // Override this to customize workflow argument behavior.
   }
 
   final public function getWorkingCopy() {
     $working_copy = $this->getConfigurationManager()->getWorkingCopyIdentity();
     if (!$working_copy) {
       $workflow = get_class($this);
       throw new Exception(
         pht(
           "This workflow ('%s') requires a working copy, override ".
           "%s to return true.",
           $workflow,
           'requiresWorkingCopy()'));
     }
     return $working_copy;
   }
 
   final public function setRepositoryAPI($api) {
     $this->repositoryAPI = $api;
     return $this;
   }
 
   final public function hasRepositoryAPI() {
     try {
       return (bool)$this->getRepositoryAPI();
     } catch (Exception $ex) {
       return false;
     }
   }
 
   final public function getRepositoryAPI() {
     if (!$this->repositoryAPI) {
       $workflow = get_class($this);
       throw new Exception(
         pht(
           "This workflow ('%s') requires a Repository API, override ".
           "%s to return true.",
           $workflow,
           'requiresRepositoryAPI()'));
     }
     return $this->repositoryAPI;
   }
 
   final protected function shouldRequireCleanUntrackedFiles() {
     return empty($this->arguments['allow-untracked']);
   }
 
   final public function setCommitMode($mode) {
     $this->commitMode = $mode;
     return $this;
   }
 
   final public function finalizeWorkingCopy() {
     if ($this->stashed) {
       $api = $this->getRepositoryAPI();
       $api->unstashChanges();
       echo pht('Restored stashed changes to the working directory.')."\n";
     }
   }
 
   final public function requireCleanWorkingCopy() {
     $api = $this->getRepositoryAPI();
 
     $must_commit = array();
 
     $working_copy_desc = phutil_console_format(
       "  %s: __%s__\n\n",
       pht('Working copy'),
       $api->getPath());
 
     // NOTE: this is a subversion-only concept.
     $incomplete = $api->getIncompleteChanges();
     if ($incomplete) {
       throw new ArcanistUsageException(
         sprintf(
           "%s\n\n%s  %s\n    %s\n\n%s",
           pht(
             "You have incompletely checked out directories in this working ".
             "copy. Fix them before proceeding.'"),
           $working_copy_desc,
           pht('Incomplete directories in working copy:'),
           implode("\n    ", $incomplete),
           pht(
             "You can fix these paths by running '%s' on them.",
             'svn update')));
     }
 
     $conflicts = $api->getMergeConflicts();
     if ($conflicts) {
       throw new ArcanistUsageException(
         sprintf(
           "%s\n\n%s  %s\n    %s",
           pht(
             'You have merge conflicts in this working copy. Resolve merge '.
             'conflicts before proceeding.'),
           $working_copy_desc,
           pht('Conflicts in working copy:'),
           implode("\n    ", $conflicts)));
     }
 
     $missing = $api->getMissingChanges();
     if ($missing) {
       throw new ArcanistUsageException(
         sprintf(
           "%s\n\n%s  %s\n    %s\n",
           pht(
             'You have missing files in this working copy. Revert or formally '.
             'remove them (with `%s`) before proceeding.',
             'svn rm'),
           $working_copy_desc,
           pht('Missing files in working copy:'),
           implode("\n    ", $missing)));
     }
 
     $externals = $api->getDirtyExternalChanges();
 
     // TODO: This state can exist in Subversion, but it is currently handled
     // elsewhere. It should probably be handled here, eventually.
     if ($api instanceof ArcanistSubversionAPI) {
       $externals = array();
     }
 
     if ($externals) {
       $message = pht(
         '%s submodule(s) have uncommitted or untracked changes:',
         new PhutilNumber(count($externals)));
 
       $prompt = pht(
         'Ignore the changes to these %s submodule(s) and continue?',
         new PhutilNumber(count($externals)));
 
       $list = id(new PhutilConsoleList())
         ->setWrap(false)
         ->addItems($externals);
 
       id(new PhutilConsoleBlock())
         ->addParagraph($message)
         ->addList($list)
         ->draw();
 
       $ok = phutil_console_confirm($prompt, $default_no = false);
       if (!$ok) {
         throw new ArcanistUserAbortException();
       }
     }
 
     $uncommitted = $api->getUncommittedChanges();
     $unstaged = $api->getUnstagedChanges();
 
     // We already dealt with externals.
     $unstaged = array_diff($unstaged, $externals);
 
     // We only want files which are purely uncommitted.
     $uncommitted = array_diff($uncommitted, $unstaged);
     $uncommitted = array_diff($uncommitted, $externals);
 
     $untracked = $api->getUntrackedChanges();
     if (!$this->shouldRequireCleanUntrackedFiles()) {
       $untracked = array();
     }
 
     if ($untracked) {
       echo sprintf(
         "%s\n\n%s",
         pht('You have untracked files in this working copy.'),
         $working_copy_desc);
 
       if ($api instanceof ArcanistGitAPI) {
         $hint = pht(
           '(To ignore these %s change(s), add them to "%s".)',
           phutil_count($untracked),
           '.git/info/exclude');
       } else if ($api instanceof ArcanistSubversionAPI) {
         $hint = pht(
           '(To ignore these %s change(s), add them to "%s".)',
           phutil_count($untracked),
           'svn:ignore');
       } else if ($api instanceof ArcanistMercurialAPI) {
         $hint = pht(
           '(To ignore these %s change(s), add them to "%s".)',
           phutil_count($untracked),
           '.hgignore');
       }
 
       $untracked_list = "    ".implode("\n    ", $untracked);
       echo sprintf(
         "  %s\n  %s\n%s",
         pht('Untracked changes in working copy:'),
         $hint,
         $untracked_list);
 
       $prompt = pht(
         'Ignore these %s untracked file(s) and continue?',
         phutil_count($untracked));
 
       if (!phutil_console_confirm($prompt)) {
         throw new ArcanistUserAbortException();
       }
     }
 
 
     $should_commit = false;
     if ($unstaged || $uncommitted) {
 
       // NOTE: We're running this because it builds a cache and can take a
       // perceptible amount of time to arrive at an answer, but we don't want
       // to pause in the middle of printing the output below.
       $this->getShouldAmend();
 
       echo sprintf(
         "%s\n\n%s",
         pht('You have uncommitted changes in this working copy.'),
         $working_copy_desc);
 
       $lists = array();
 
       if ($unstaged) {
         $unstaged_list = "    ".implode("\n    ", $unstaged);
         $lists[] = sprintf(
           "  %s\n%s",
           pht('Unstaged changes in working copy:'),
           $unstaged_list);
       }
 
       if ($uncommitted) {
         $uncommitted_list = "    ".implode("\n    ", $uncommitted);
         $lists[] = sprintf(
           "%s\n%s",
           pht('Uncommitted changes in working copy:'),
           $uncommitted_list);
       }
 
       echo implode("\n\n", $lists)."\n";
 
       $all_uncommitted = array_merge($unstaged, $uncommitted);
       if ($this->askForAdd($all_uncommitted)) {
         if ($unstaged) {
           $api->addToCommit($unstaged);
         }
         $should_commit = true;
       } else {
         $permit_autostash = $this->getConfigFromAnySource('arc.autostash');
         if ($permit_autostash && $api->canStashChanges()) {
            echo pht(
             'Stashing uncommitted changes. (You can restore them with `%s`).',
             'git stash pop')."\n";
           $api->stashChanges();
           $this->stashed = true;
         } else {
           throw new ArcanistUsageException(
             pht(
               'You can not continue with uncommitted changes. '.
               'Commit or discard them before proceeding.'));
         }
       }
     }
 
     if ($should_commit) {
       if ($this->getShouldAmend()) {
         $commit = head($api->getLocalCommitInformation());
         $api->amendCommit($commit['message']);
       } else if ($api->supportsLocalCommits()) {
         $template = sprintf(
           "\n\n# %s\n#\n# %s\n#\n",
           pht('Enter a commit message.'),
           pht('Changes:'));
 
         $paths = array_merge($uncommitted, $unstaged);
         $paths = array_unique($paths);
         sort($paths);
 
         foreach ($paths as $path) {
           $template .= "#     ".$path."\n";
         }
 
         $commit_message = $this->newInteractiveEditor($template)
           ->setName(pht('commit-message'))
           ->editInteractively();
 
         if ($commit_message === $template) {
           throw new ArcanistUsageException(
             pht('You must provide a commit message.'));
         }
 
         $commit_message = ArcanistCommentRemover::removeComments(
           $commit_message);
 
         if (!strlen($commit_message)) {
           throw new ArcanistUsageException(
             pht('You must provide a nonempty commit message.'));
         }
 
         $api->doCommit($commit_message);
       }
     }
   }
 
   private function getShouldAmend() {
     if ($this->shouldAmend === null) {
       $this->shouldAmend = $this->calculateShouldAmend();
     }
     return $this->shouldAmend;
   }
 
   private function calculateShouldAmend() {
     $api = $this->getRepositoryAPI();
 
     if ($this->isHistoryImmutable() || !$api->supportsAmend()) {
       return false;
     }
 
     $commits = $api->getLocalCommitInformation();
     if (!$commits) {
       return false;
     }
 
     $commit = reset($commits);
     $message = ArcanistDifferentialCommitMessage::newFromRawCorpus(
       $commit['message']);
 
     if ($message->getGitSVNBaseRevision()) {
       return false;
     }
 
     if ($api->getAuthor() != $commit['author']) {
       return false;
     }
 
     if ($message->getRevisionID() && $this->getArgument('create')) {
       return false;
     }
 
     // TODO: Check commits since tracking branch. If empty then return false.
 
     // Don't amend the current commit if it has already been published.
     $repository = $this->loadProjectRepository();
     if ($repository) {
       $repo_id = $repository['id'];
       $commit_hash = $commit['commit'];
       $callsign =  idx($repository, 'callsign');
       if ($callsign) {
         // The server might be too old to support the new style commit names,
         // so prefer the old way
         $commit_name = "r{$callsign}{$commit_hash}";
       } else {
         $commit_name = "R{$repo_id}:{$commit_hash}";
       }
 
       $result = $this->getConduit()->callMethodSynchronous(
         'diffusion.querycommits',
         array('names' => array($commit_name)));
       $known_commit = idx($result['identifierMap'], $commit_name);
       if ($known_commit) {
         return false;
       }
     }
 
     if (!$message->getRevisionID()) {
       return true;
     }
 
     $in_working_copy = $api->loadWorkingCopyDifferentialRevisions(
       $this->getConduit(),
       array(
         'authors' => array($this->getUserPHID()),
         'status' => 'status-open',
       ));
     if ($in_working_copy) {
       return true;
     }
 
     return false;
   }
 
   private function askForAdd(array $files) {
     if ($this->commitMode == self::COMMIT_DISABLE) {
       return false;
     }
     if ($this->commitMode == self::COMMIT_ENABLE) {
       return true;
     }
     $prompt = $this->getAskForAddPrompt($files);
     return phutil_console_confirm($prompt);
   }
 
   private function getAskForAddPrompt(array $files) {
     if ($this->getShouldAmend()) {
       $prompt = pht(
         'Do you want to amend these %s change(s) to the current commit?',
         phutil_count($files));
     } else {
       $prompt = pht(
         'Do you want to create a new commit with these %s change(s)?',
         phutil_count($files));
     }
     return $prompt;
   }
 
   final protected function loadDiffBundleFromConduit(
     ConduitClient $conduit,
     $diff_id) {
 
     return $this->loadBundleFromConduit(
       $conduit,
       array(
       'ids' => array($diff_id),
     ));
   }
 
   final protected function loadRevisionBundleFromConduit(
     ConduitClient $conduit,
     $revision_id) {
 
     return $this->loadBundleFromConduit(
       $conduit,
       array(
       'revisionIDs' => array($revision_id),
     ));
   }
 
   final private function loadBundleFromConduit(
     ConduitClient $conduit,
     $params) {
 
     $future = $conduit->callMethod('differential.querydiffs', $params);
     $diff = head($future->resolve());
 
     if ($diff == null) {
       throw new Exception(
         phutil_console_wrap(
           pht("The diff or revision you specified is either invalid or you ".
           "don't have permission to view it."))
       );
     }
 
     $changes = array();
     foreach ($diff['changes'] as $changedict) {
       $changes[] = ArcanistDiffChange::newFromDictionary($changedict);
     }
     $bundle = ArcanistBundle::newFromChanges($changes);
     $bundle->setConduit($conduit);
     // since the conduit method has changes, assume that these fields
     // could be unset
     $bundle->setBaseRevision(idx($diff, 'sourceControlBaseRevision'));
     $bundle->setRevisionID(idx($diff, 'revisionID'));
     $bundle->setAuthorName(idx($diff, 'authorName'));
     $bundle->setAuthorEmail(idx($diff, 'authorEmail'));
     return $bundle;
   }
 
   /**
    * Return a list of lines changed by the current diff, or ##null## if the
    * change list is meaningless (for example, because the path is a directory
    * or binary file).
    *
    * @param string      Path within the repository.
    * @param string      Change selection mode (see ArcanistDiffHunk).
    * @return list|null  List of changed line numbers, or null to indicate that
    *                    the path is not a line-oriented text file.
    */
   final protected function getChangedLines($path, $mode) {
     $repository_api = $this->getRepositoryAPI();
     $full_path = $repository_api->getPath($path);
     if (is_dir($full_path)) {
       return null;
     }
 
     if (!file_exists($full_path)) {
       return null;
     }
 
     $change = $this->getChange($path);
 
     if ($change->getFileType() !== ArcanistDiffChangeType::FILE_TEXT) {
       return null;
     }
 
     $lines = $change->getChangedLines($mode);
     return array_keys($lines);
   }
 
   final protected function getChange($path) {
     $repository_api = $this->getRepositoryAPI();
 
     // TODO: Very gross
     $is_git = ($repository_api instanceof ArcanistGitAPI);
     $is_hg = ($repository_api instanceof ArcanistMercurialAPI);
     $is_svn = ($repository_api instanceof ArcanistSubversionAPI);
 
     if ($is_svn) {
       // NOTE: In SVN, we don't currently support a "get all local changes"
       // operation, so special case it.
       if (empty($this->changeCache[$path])) {
         $diff = $repository_api->getRawDiffText($path);
         $parser = $this->newDiffParser();
         $changes = $parser->parseDiff($diff);
         if (count($changes) != 1) {
           throw new Exception(pht('Expected exactly one change.'));
         }
         $this->changeCache[$path] = reset($changes);
       }
     } else if ($is_git || $is_hg) {
       if (empty($this->changeCache)) {
         $changes = $repository_api->getAllLocalChanges();
         foreach ($changes as $change) {
           $this->changeCache[$change->getCurrentPath()] = $change;
         }
       }
     } else {
       throw new Exception(pht('Missing VCS support.'));
     }
 
     if (empty($this->changeCache[$path])) {
       if ($is_git || $is_hg) {
         // This can legitimately occur under git/hg if you make a change,
         // "git/hg commit" it, and then revert the change in the working copy
         // and run "arc lint".
         $change = new ArcanistDiffChange();
         $change->setCurrentPath($path);
         return $change;
       } else {
         throw new Exception(
           pht(
             "Trying to get change for unchanged path '%s'!",
             $path));
       }
     }
 
     return $this->changeCache[$path];
   }
 
   final public function willRunWorkflow() {
     $spec = $this->getCompleteArgumentSpecification();
     foreach ($this->arguments as $arg => $value) {
       if (empty($spec[$arg])) {
         continue;
       }
       $options = $spec[$arg];
       if (!empty($options['supports'])) {
         $system_name = $this->getRepositoryAPI()->getSourceControlSystemName();
         if (!in_array($system_name, $options['supports'])) {
           $extended_info = null;
           if (!empty($options['nosupport'][$system_name])) {
             $extended_info = ' '.$options['nosupport'][$system_name];
           }
           throw new ArcanistUsageException(
             pht(
               "Option '%s' is not supported under %s.",
               "--{$arg}",
               $system_name).
             $extended_info);
         }
       }
     }
   }
 
   final protected function normalizeRevisionID($revision_id) {
     return preg_replace('/^D/i', '', $revision_id);
   }
 
   protected function shouldShellComplete() {
     return true;
   }
 
   protected function getShellCompletions(array $argv) {
     return array();
   }
 
   public function getSupportedRevisionControlSystems() {
     return array('git', 'hg', 'svn');
   }
 
   final protected function getPassthruArgumentsAsMap($command) {
     $map = array();
     foreach ($this->getCompleteArgumentSpecification() as $key => $spec) {
       if (!empty($spec['passthru'][$command])) {
         if (isset($this->arguments[$key])) {
           $map[$key] = $this->arguments[$key];
         }
       }
     }
     return $map;
   }
 
   final protected function getPassthruArgumentsAsArgv($command) {
     $spec = $this->getCompleteArgumentSpecification();
     $map = $this->getPassthruArgumentsAsMap($command);
     $argv = array();
     foreach ($map as $key => $value) {
       $argv[] = '--'.$key;
       if (!empty($spec[$key]['param'])) {
         $argv[] = $value;
       }
     }
     return $argv;
   }
 
   /**
    * Write a message to stderr so that '--json' flags or stdout which is meant
    * to be piped somewhere aren't disrupted.
    *
    * @param string  Message to write to stderr.
    * @return void
    */
   final protected function writeStatusMessage($msg) {
     fwrite(STDERR, $msg);
   }
 
   final public function writeInfo($title, $message) {
     $this->writeStatusMessage(
       phutil_console_format(
         "<bg:blue>** %s **</bg> %s\n",
         $title,
         $message));
   }
 
   final public function writeWarn($title, $message) {
     $this->writeStatusMessage(
       phutil_console_format(
         "<bg:yellow>** %s **</bg> %s\n",
         $title,
         $message));
   }
 
   final public function writeOkay($title, $message) {
     $this->writeStatusMessage(
       phutil_console_format(
         "<bg:green>** %s **</bg> %s\n",
         $title,
         $message));
   }
 
   final protected function isHistoryImmutable() {
     $repository_api = $this->getRepositoryAPI();
 
     $config = $this->getConfigFromAnySource('history.immutable');
     if ($config !== null) {
       return $config;
     }
 
     return $repository_api->isHistoryDefaultImmutable();
   }
 
   /**
    * Workflows like 'lint' and 'unit' operate on a list of working copy paths.
    * The user can either specify the paths explicitly ("a.js b.php"), or by
    * specifying a revision ("--rev a3f10f1f") to select all paths modified
    * since that revision, or by omitting both and letting arc choose the
    * default relative revision.
    *
    * This method takes the user's selections and returns the paths that the
    * workflow should act upon.
    *
    * @param   list          List of explicitly provided paths.
    * @param   string|null   Revision name, if provided.
    * @param   mask          Mask of ArcanistRepositoryAPI flags to exclude.
    *                        Defaults to ArcanistRepositoryAPI::FLAG_UNTRACKED.
    * @return  list          List of paths the workflow should act on.
    */
   final protected function selectPathsForWorkflow(
     array $paths,
     $rev,
     $omit_mask = null) {
 
     if ($omit_mask === null) {
       $omit_mask = ArcanistRepositoryAPI::FLAG_UNTRACKED;
     }
 
     if ($paths) {
       $working_copy = $this->getWorkingCopy();
       foreach ($paths as $key => $path) {
         $full_path = Filesystem::resolvePath($path);
         if (!Filesystem::pathExists($full_path)) {
           throw new ArcanistUsageException(
             pht(
               "Path '%s' does not exist!",
               $path));
         }
         $relative_path = Filesystem::readablePath(
           $full_path,
           $working_copy->getProjectRoot());
         $paths[$key] = $relative_path;
       }
     } else {
       $repository_api = $this->getRepositoryAPI();
 
       if ($rev) {
         $this->parseBaseCommitArgument(array($rev));
       }
 
       $paths = $repository_api->getWorkingCopyStatus();
       foreach ($paths as $path => $flags) {
         if ($flags & $omit_mask) {
           unset($paths[$path]);
         }
       }
       $paths = array_keys($paths);
     }
 
     return array_values($paths);
   }
 
   final protected function renderRevisionList(array $revisions) {
     $list = array();
     foreach ($revisions as $revision) {
       $list[] = '     - D'.$revision['id'].': '.$revision['title']."\n";
     }
     return implode('', $list);
   }
 
 
 /* -(  Scratch Files  )------------------------------------------------------ */
 
 
   /**
    * Try to read a scratch file, if it exists and is readable.
    *
    * @param string Scratch file name.
    * @return mixed String for file contents, or false for failure.
    * @task scratch
    */
   final protected function readScratchFile($path) {
     if (!$this->repositoryAPI) {
       return false;
     }
     return $this->getRepositoryAPI()->readScratchFile($path);
   }
 
 
   /**
    * Try to read a scratch JSON file, if it exists and is readable.
    *
    * @param string Scratch file name.
    * @return array Empty array for failure.
    * @task scratch
    */
   final protected function readScratchJSONFile($path) {
     $file = $this->readScratchFile($path);
     if (!$file) {
       return array();
     }
     return phutil_json_decode($file);
   }
 
 
   /**
    * Try to write a scratch file, if there's somewhere to put it and we can
    * write there.
    *
    * @param  string Scratch file name to write.
    * @param  string Data to write.
    * @return bool   True on success, false on failure.
    * @task scratch
    */
   final protected function writeScratchFile($path, $data) {
     if (!$this->repositoryAPI) {
       return false;
     }
     return $this->getRepositoryAPI()->writeScratchFile($path, $data);
   }
 
 
   /**
    * Try to write a scratch JSON file, if there's somewhere to put it and we can
    * write there.
    *
    * @param  string Scratch file name to write.
    * @param  array Data to write.
    * @return bool   True on success, false on failure.
    * @task scratch
    */
   final protected function writeScratchJSONFile($path, array $data) {
     return $this->writeScratchFile($path, json_encode($data));
   }
 
 
   /**
    * Try to remove a scratch file.
    *
    * @param   string  Scratch file name to remove.
    * @return  bool    True if the file was removed successfully.
    * @task scratch
    */
   final protected function removeScratchFile($path) {
     if (!$this->repositoryAPI) {
       return false;
     }
     return $this->getRepositoryAPI()->removeScratchFile($path);
   }
 
 
   /**
    * Get a human-readable description of the scratch file location.
    *
    * @param string  Scratch file name.
    * @return mixed  String, or false on failure.
    * @task scratch
    */
   final protected function getReadableScratchFilePath($path) {
     if (!$this->repositoryAPI) {
       return false;
     }
     return $this->getRepositoryAPI()->getReadableScratchFilePath($path);
   }
 
 
   /**
    * Get the path to a scratch file, if possible.
    *
    * @param string  Scratch file name.
    * @return mixed  File path, or false on failure.
    * @task scratch
    */
   final protected function getScratchFilePath($path) {
     if (!$this->repositoryAPI) {
       return false;
     }
     return $this->getRepositoryAPI()->getScratchFilePath($path);
   }
 
   final protected function getRepositoryEncoding() {
     return nonempty(
       idx($this->loadProjectRepository(), 'encoding'),
       'UTF-8');
   }
 
   final protected function loadProjectRepository() {
     list($info, $reasons) = $this->loadRepositoryInformation();
     return coalesce($info, array());
   }
 
   final protected function newInteractiveEditor($text) {
     $editor = new PhutilInteractiveEditor($text);
 
     $preferred = $this->getConfigFromAnySource('editor');
     if ($preferred) {
       $editor->setPreferredEditor($preferred);
     }
 
     return $editor;
   }
 
   final protected function newDiffParser() {
     $parser = new ArcanistDiffParser();
     if ($this->repositoryAPI) {
       $parser->setRepositoryAPI($this->getRepositoryAPI());
     }
     $parser->setWriteDiffOnFailure(true);
     return $parser;
   }
 
   final protected function resolveCall(ConduitFuture $method, $timeout = null) {
     try {
       return $method->resolve($timeout);
     } catch (ConduitClientException $ex) {
       if ($ex->getErrorCode() == 'ERR-CONDUIT-CALL') {
         echo phutil_console_wrap(
           pht(
             'This feature requires a newer version of Phabricator. Please '.
             'update it using these instructions: %s',
             'https://secure.phabricator.com/book/phabricator/article/'.
               'upgrading/')."\n\n");
       }
       throw $ex;
     }
   }
 
   final protected function dispatchEvent($type, array $data) {
     $data += array(
       'workflow' => $this,
     );
 
     $event = new PhutilEvent($type, $data);
     PhutilEventEngine::dispatchEvent($event);
 
     return $event;
   }
 
   final public function parseBaseCommitArgument(array $argv) {
     if (!count($argv)) {
       return;
     }
 
     $api = $this->getRepositoryAPI();
     if (!$api->supportsCommitRanges()) {
       throw new ArcanistUsageException(
         pht('This version control system does not support commit ranges.'));
     }
 
     if (count($argv) > 1) {
       throw new ArcanistUsageException(
         pht(
           'Specify exactly one base commit. The end of the commit range is '.
           'always the working copy state.'));
     }
 
     $api->setBaseCommit(head($argv));
 
     return $this;
   }
 
   final protected function getRepositoryVersion() {
     if (!$this->repositoryVersion) {
       $api = $this->getRepositoryAPI();
       $commit = $api->getSourceControlBaseRevision();
       $versions = array('' => $commit);
       foreach ($api->getChangedFiles($commit) as $path => $mask) {
         $versions[$path] = (Filesystem::pathExists($path)
           ? md5_file($path)
           : '');
       }
       $this->repositoryVersion = md5(json_encode($versions));
     }
     return $this->repositoryVersion;
   }
 
 
 /* -(  Phabricator Repositories  )------------------------------------------- */
 
 
   /**
    * Get the PHID of the Phabricator repository this working copy corresponds
    * to. Returns `null` if no repository can be identified.
    *
    * @return phid|null  Repository PHID, or null if no repository can be
    *                    identified.
    *
    * @task phabrep
    */
   final protected function getRepositoryPHID() {
     return idx($this->getRepositoryInformation(), 'phid');
   }
 
   /**
    * Get the name of the Phabricator repository this working copy
    * corresponds to. Returns `null` if no repository can be identified.
    *
    * @return string|null  Repository name, or null if no repository can be
    *                      identified.
    *
    * @task phabrep
    */
   final protected function getRepositoryName() {
     return idx($this->getRepositoryInformation(), 'name');
   }
 
 
   /**
    * Get the URI of the Phabricator repository this working copy
    * corresponds to. Returns `null` if no repository can be identified.
    *
    * @return string|null  Repository URI, or null if no repository can be
    *                      identified.
    *
    * @task phabrep
    */
   final protected function getRepositoryURI() {
     return idx($this->getRepositoryInformation(), 'uri');
   }
 
 
   final protected function getRepositoryStagingConfiguration() {
     return idx($this->getRepositoryInformation(), 'staging');
   }
 
 
   /**
    * Get human-readable reasoning explaining how `arc` evaluated which
    * Phabricator repository corresponds to this working copy. Used by
    * `arc which` to explain the process to users.
    *
    * @return list<string> Human-readable explanation of the repository
    *                      association process.
    *
    * @task phabrep
    */
   final protected function getRepositoryReasons() {
     $this->getRepositoryInformation();
     return $this->repositoryReasons;
   }
 
 
   /**
    * @task phabrep
    */
   private function getRepositoryInformation() {
     if ($this->repositoryInfo === null) {
       list($info, $reasons) = $this->loadRepositoryInformation();
       $this->repositoryInfo = nonempty($info, array());
       $this->repositoryReasons = $reasons;
     }
 
     return $this->repositoryInfo;
   }
 
 
   /**
    * @task phabrep
    */
   private function loadRepositoryInformation() {
     list($query, $reasons) = $this->getRepositoryQuery();
     if (!$query) {
       return array(null, $reasons);
     }
 
     try {
       $method = 'repository.query';
       $results = $this->getConduitEngine()->newCall($method, $query)
         ->resolve();
     } catch (ConduitClientException $ex) {
       if ($ex->getErrorCode() == 'ERR-CONDUIT-CALL') {
         $reasons[] = pht(
           'This version of Arcanist is more recent than the version of '.
           'Phabricator you are connecting to: the Phabricator install is '.
           'out of date and does not have support for identifying '.
           'repositories by callsign or URI. Update Phabricator to enable '.
           'these features.');
         return array(null, $reasons);
       }
       throw $ex;
     }
 
     $result = null;
     if (!$results) {
       $reasons[] = pht(
         'No repositories matched the query. Check that your configuration '.
         'is correct, or use "%s" to select a repository explicitly.',
         'repository.callsign');
     } else if (count($results) > 1) {
       $reasons[] = pht(
         'Multiple repostories (%s) matched the query. You can use the '.
         '"%s" configuration to select the one you want.',
         implode(', ', ipull($results, 'callsign')),
         'repository.callsign');
     } else {
       $result = head($results);
       $reasons[] = pht('Found a unique matching repository.');
     }
 
     return array($result, $reasons);
   }
 
 
   /**
    * @task phabrep
    */
   private function getRepositoryQuery() {
     $reasons = array();
 
     $callsign = $this->getConfigFromAnySource('repository.callsign');
     if ($callsign) {
       $query = array(
         'callsigns' => array($callsign),
       );
       $reasons[] = pht(
         'Configuration value "%s" is set to "%s".',
         'repository.callsign',
         $callsign);
       return array($query, $reasons);
     } else {
       $reasons[] = pht(
         'Configuration value "%s" is empty.',
         'repository.callsign');
     }
 
     $uuid = $this->getRepositoryAPI()->getRepositoryUUID();
     if ($uuid !== null) {
       $query = array(
         'uuids' => array($uuid),
       );
       $reasons[] = pht(
         'The UUID for this working copy is "%s".',
         $uuid);
       return array($query, $reasons);
     } else {
       $reasons[] = pht(
         'This repository has no VCS UUID (this is normal for git/hg).');
     }
 
     $remote_uri = $this->getRepositoryAPI()->getRemoteURI();
     if ($remote_uri !== null) {
       $query = array(
         'remoteURIs' => array($remote_uri),
       );
       $reasons[] = pht(
         'The remote URI for this working copy is "%s".',
         $remote_uri);
       return array($query, $reasons);
     } else {
       $reasons[] = pht(
         'Unable to determine the remote URI for this repository.');
     }
 
     return array(null, $reasons);
   }
 
 
   /**
    * Build a new lint engine for the current working copy.
    *
    * Optionally, you can pass an explicit engine class name to build an engine
    * of a particular class. Normally this is used to implement an `--engine`
    * flag from the CLI.
    *
    * @param string Optional explicit engine class name.
    * @return ArcanistLintEngine Constructed engine.
    */
   protected function newLintEngine($engine_class = null) {
     $working_copy = $this->getWorkingCopy();
     $config = $this->getConfigurationManager();
 
     if (!$engine_class) {
       $engine_class = $config->getConfigFromAnySource('lint.engine');
     }
 
     if (!$engine_class) {
       if (Filesystem::pathExists($working_copy->getProjectPath('.arclint'))) {
         $engine_class = 'ArcanistConfigurationDrivenLintEngine';
       }
     }
 
     if (!$engine_class) {
       throw new ArcanistNoEngineException(
         pht(
           "No lint engine is configured for this project. Create an '%s' ".
           "file, or configure an advanced engine with '%s' in '%s'.",
           '.arclint',
           'lint.engine',
           '.arcconfig'));
     }
 
     $base_class = 'ArcanistLintEngine';
     if (!class_exists($engine_class) ||
         !is_subclass_of($engine_class, $base_class)) {
       throw new ArcanistUsageException(
         pht(
           'Configured lint engine "%s" is not a subclass of "%s", but must be.',
           $engine_class,
           $base_class));
     }
 
     $engine = newv($engine_class, array())
       ->setWorkingCopy($working_copy)
       ->setConfigurationManager($config);
 
     return $engine;
   }
 
   /**
    * Build a new unit test engine for the current working copy.
    *
    * Optionally, you can pass an explicit engine class name to build an engine
    * of a particular class. Normally this is used to implement an `--engine`
    * flag from the CLI.
    *
    * @param string Optional explicit engine class name.
    * @return ArcanistUnitTestEngine Constructed engine.
    */
   protected function newUnitTestEngine($engine_class = null) {
     $working_copy = $this->getWorkingCopy();
     $config = $this->getConfigurationManager();
 
     if (!$engine_class) {
       $engine_class = $config->getConfigFromAnySource('unit.engine');
     }
 
     if (!$engine_class) {
       if (Filesystem::pathExists($working_copy->getProjectPath('.arcunit'))) {
         $engine_class = 'ArcanistConfigurationDrivenUnitTestEngine';
       }
     }
 
     if (!$engine_class) {
       throw new ArcanistNoEngineException(
         pht(
           "No unit test engine is configured for this project. Create an ".
           "'%s' file, or configure an advanced engine with '%s' in '%s'.",
           '.arcunit',
           'unit.engine',
           '.arcconfig'));
     }
 
     $base_class = 'ArcanistUnitTestEngine';
     if (!class_exists($engine_class) ||
         !is_subclass_of($engine_class, $base_class)) {
       throw new ArcanistUsageException(
         pht(
           'Configured unit test engine "%s" is not a subclass of "%s", '.
           'but must be.',
           $engine_class,
           $base_class));
     }
 
     $engine = newv($engine_class, array())
       ->setWorkingCopy($working_copy)
       ->setConfigurationManager($config);
 
     return $engine;
   }
 
 
   protected function openURIsInBrowser(array $uris) {
     $browser = $this->getBrowserCommand();
     foreach ($uris as $uri) {
       $err = phutil_passthru('%s %s', $browser, $uri);
       if ($err) {
         throw new ArcanistUsageException(
           pht(
             "Failed to open '%s' in browser ('%s'). ".
             "Check your 'browser' config option.",
             $uri,
             $browser));
       }
     }
   }
 
   private function getBrowserCommand() {
     $config = $this->getConfigFromAnySource('browser');
     if ($config) {
       return $config;
     }
 
     if (phutil_is_windows()) {
       return 'start';
     }
 
     $candidates = array('sensible-browser', 'xdg-open', 'open');
 
     // NOTE: The "open" command works well on OS X, but on many Linuxes "open"
     // exists and is not a browser. For now, we're just looking for other
     // commands first, but we might want to be smarter about selecting "open"
     // only on OS X.
 
     foreach ($candidates as $cmd) {
       if (Filesystem::binaryExists($cmd)) {
         return $cmd;
       }
     }
 
     throw new ArcanistUsageException(
       pht(
         "Unable to find a browser command to run. Set '%s' in your ".
         "Arcanist config to specify a command to use.",
         'browser'));
   }
 
 
   /**
    * Ask Phabricator to update the current repository as soon as possible.
    *
    * Calling this method after pushing commits allows Phabricator to discover
    * the commits more quickly, so the system overall is more responsive.
    *
    * @return void
    */
   protected function askForRepositoryUpdate() {
     // If we know which repository we're in, try to tell Phabricator that we
     // pushed commits to it so it can update. This hint can help pull updates
     // more quickly, especially in rarely-used repositories.
     if ($this->getRepositoryPHID()) {
       try {
         $this->getConduit()->callMethodSynchronous(
           'diffusion.looksoon',
           array(
             'repositories' => array($this->getRepositoryPHID()),
           ));
       } catch (ConduitClientException $ex) {
         // If we hit an exception, just ignore it. Likely, we are running
         // against a Phabricator which is too old to support this method.
         // Since this hint is purely advisory, it doesn't matter if it has
         // no effect.
       }
     }
   }
 
   protected function getModernLintDictionary(array $map) {
     $map = $this->getModernCommonDictionary($map);
     return $map;
   }
 
   protected function getModernUnitDictionary(array $map) {
     $map = $this->getModernCommonDictionary($map);
 
     $details = idx($map, 'userData');
     if (strlen($details)) {
       $map['details'] = (string)$details;
     }
     unset($map['userData']);
 
     return $map;
   }
 
   private function getModernCommonDictionary(array $map) {
     foreach ($map as $key => $value) {
       if ($value === null) {
         unset($map[$key]);
       }
     }
     return $map;
   }
 
   final public function setConduitEngine(
     ArcanistConduitEngine $conduit_engine) {
     $this->conduitEngine = $conduit_engine;
     return $this;
   }
 
   final public function getConduitEngine() {
     return $this->conduitEngine;
   }
 
   final protected function newWorkingCopyStateRef() {
     $ref = new ArcanistWorkingCopyStateRef();
 
     $working_copy = $this->getWorkingCopy();
     $ref->setRootDirectory($working_copy->getProjectRoot());
 
     return $ref;
   }
 
   final protected function newRefQuery(array $refs) {
     assert_instances_of($refs, 'ArcanistRef');
 
     $query = id(new ArcanistRefQuery())
       ->setConduitEngine($this->getConduitEngine())
       ->setRefs($refs);
 
     if ($this->hasRepositoryAPI()) {
       $query->setRepositoryAPI($this->getRepositoryAPI());
     }
 
     $repository_ref = $this->getRepositoryRef();
     if ($repository_ref) {
       $query->setRepositoryRef($repository_ref);
     }
 
     $working_copy = $this->getConfigurationManager()->getWorkingCopyIdentity();
     if ($working_copy) {
       $working_ref = $this->newWorkingCopyStateRef();
       $query->setWorkingCopyRef($working_ref);
     }
 
     return $query;
   }
 
   final public function getRepositoryRef() {
     if (!$this->getConfigurationManager()->getWorkingCopyIdentity()) {
       return null;
     }
 
     if (!$this->repositoryAPI) {
       return null;
     }
 
     if (!$this->repositoryRef) {
       $ref = id(new ArcanistRepositoryRef())
         ->setPHID($this->getRepositoryPHID())
         ->setBrowseURI($this->getRepositoryURI());
 
       $this->repositoryRef = $ref;
     }
 
     return $this->repositoryRef;
   }
 
 }
diff --git a/src/workingcopy/ArcanistGitWorkingCopy.php b/src/workingcopy/ArcanistGitWorkingCopy.php
new file mode 100644
index 00000000..bf6f9e94
--- /dev/null
+++ b/src/workingcopy/ArcanistGitWorkingCopy.php
@@ -0,0 +1,25 @@
+<?php
+
+final class ArcanistGitWorkingCopy
+  extends ArcanistWorkingCopy {
+
+  public function getMetadataDirectory() {
+    return $this->getPath('.git');
+  }
+
+  protected function newWorkingCopyFromDirectories(
+    $working_directory,
+    $ancestor_directory) {
+
+    if (!Filesystem::pathExists($ancestor_directory.'/.git')) {
+      return null;
+    }
+
+    return new self();
+  }
+
+  public function newRepositoryAPI() {
+    return new ArcanistGitAPI($this->getPath());
+  }
+
+}
diff --git a/src/workingcopy/ArcanistMercurialWorkingCopy.php b/src/workingcopy/ArcanistMercurialWorkingCopy.php
new file mode 100644
index 00000000..fde360c7
--- /dev/null
+++ b/src/workingcopy/ArcanistMercurialWorkingCopy.php
@@ -0,0 +1,25 @@
+<?php
+
+final class ArcanistMercurialWorkingCopy
+  extends ArcanistWorkingCopy {
+
+  public function getMetadataDirectory() {
+    return $this->getPath('.hg');
+  }
+
+  protected function newWorkingCopyFromDirectories(
+    $working_directory,
+    $ancestor_directory) {
+
+    if (!Filesystem::pathExists($ancestor_directory.'/.hg')) {
+      return null;
+    }
+
+    return new self();
+  }
+
+  public function newRepositoryAPI() {
+    return new ArcanistMercurialAPI($this->getPath());
+  }
+
+}
diff --git a/src/workingcopy/ArcanistSubversionWorkingCopy.php b/src/workingcopy/ArcanistSubversionWorkingCopy.php
new file mode 100644
index 00000000..c368dfe5
--- /dev/null
+++ b/src/workingcopy/ArcanistSubversionWorkingCopy.php
@@ -0,0 +1,77 @@
+<?php
+
+final class ArcanistSubversionWorkingCopy
+  extends ArcanistWorkingCopy {
+
+  public function getProjectConfigurationFilePath() {
+    // In Subversion, we allow ".arcconfig" to appear at any level of the
+    // filesystem between the working directory and the working copy root.
+
+    // We allow this because Subversion repositories are hierarchical and
+    // may have a "projects/xyz/" directory which is meaningfully an entirely
+    // different project from "projects/abc/".
+
+    // You can checkout "projects/" and have the ".svn/" directory appear
+    // there, then change into "abc/" and expect "arc" to operate within the
+    // context of the "abc/" project.
+
+    $paths = Filesystem::walkToRoot($this->getWorkingDirectory());
+    $root = $this->getPath();
+    foreach ($paths as $path) {
+      if (!Filesystem::isDescendant($path, $root)) {
+        break;
+      }
+
+      $candidate = $path.'/.arcconfig';
+      if (Filesystem::pathExists($candidate)) {
+        return $candidate;
+      }
+    }
+
+    return parent::getProjectConfigurationFilePath();
+  }
+
+  public function getMetadataDirectory() {
+    return $this->getPath('.svn');
+  }
+
+  protected function newWorkingCopyFromDirectories(
+    $working_directory,
+    $ancestor_directory) {
+
+    if (!Filesystem::pathExists($ancestor_directory.'/.svn')) {
+      return null;
+    }
+
+    return new self();
+  }
+
+  protected function selectFromNestedWorkingCopies(array $candidates) {
+    // To select the best working copy in Subversion, we first walk up the
+    // tree looking for a working copy with an ".arcconfig" file. If we find
+    // one, this anchors us.
+
+    foreach (array_reverse($candidates) as $candidate) {
+      $arcconfig = $candidate->getPath('.arcconfig');
+      if (Filesystem::pathExists($arcconfig)) {
+        return $candidate;
+      }
+    }
+
+    // If we didn't find one, we select the outermost working copy. This is
+    // because older versions of Subversion (prior to 1.7) put a ".svn" file
+    // in every directory, and all versions of Subversion allow you to check
+    // out any subdirectory of the project as a working copy.
+
+    // We could possibly refine this by testing if the working copy was made
+    // with a recent version of Subversion and picking the deepest working copy
+    // if it was, similar to Git and Mercurial.
+
+    return head($candidates);
+  }
+
+  public function newRepositoryAPI() {
+    return new ArcanistSubversionAPI($this->getPath());
+  }
+
+}
diff --git a/src/workingcopy/ArcanistWorkingCopy.php b/src/workingcopy/ArcanistWorkingCopy.php
new file mode 100644
index 00000000..3a6a8ced
--- /dev/null
+++ b/src/workingcopy/ArcanistWorkingCopy.php
@@ -0,0 +1,115 @@
+<?php
+
+abstract class ArcanistWorkingCopy
+  extends Phobject {
+
+  private $path;
+  private $workingDirectory;
+
+  public static function newFromWorkingDirectory($path) {
+    $working_types = id(new PhutilClassMapQuery())
+      ->setAncestorClass(__CLASS__)
+      ->execute();
+
+    $paths = Filesystem::walkToRoot($path);
+    $paths = array_reverse($paths);
+
+    $candidates = array();
+    foreach ($paths as $path_key => $ancestor_path) {
+      foreach ($working_types as $working_type) {
+
+        $working_copy = $working_type->newWorkingCopyFromDirectories(
+          $path,
+          $ancestor_path);
+        if (!$working_copy) {
+          continue;
+        }
+
+        $working_copy->path = $ancestor_path;
+        $working_copy->workingDirectory = $path;
+
+        $candidates[] = $working_copy;
+      }
+    }
+
+    // If we've found multiple candidate working copies, we need to pick one.
+    // We let the innermost working copy pick the best candidate from among
+    // candidates of the same type. The rules for Git and Mercurial differ
+    // slightly from the rules for Subversion.
+
+    if ($candidates) {
+      $deepest = last($candidates);
+
+      foreach ($candidates as $key => $candidate) {
+        if (get_class($candidate) != get_class($deepest)) {
+          unset($candidates[$key]);
+        }
+      }
+      $candidates = array_values($candidates);
+
+      return $deepest->selectFromNestedWorkingCopies($candidates);
+    }
+
+    return null;
+  }
+
+  abstract protected function newWorkingCopyFromDirectories(
+    $working_directory,
+    $ancestor_directory);
+
+  final public function getPath($to_file = null) {
+    return Filesystem::concatenatePaths(
+      array(
+        $this->path,
+        $to_file,
+      ));
+  }
+
+  final public function getWorkingDirectory() {
+    return $this->workingDirectory;
+  }
+
+  public function getProjectConfigurationFilePath() {
+    return $this->getPath('.arcconfig');
+  }
+
+  public function getLocalConfigurationFilePath() {
+    if ($this->hasMetadataDirectory()) {
+      return $this->getMetadataPath('arc/config');
+    }
+
+    return null;
+  }
+
+  public function getMetadataDirectory() {
+    return null;
+  }
+
+  final public function hasMetadataDirectory() {
+    return ($this->getMetadataDirectory() !== null);
+  }
+
+  final public function getMetadataPath($to_file = null) {
+    if (!$this->hasMetadataDirectory()) {
+      throw new Exception(
+        pht(
+          'This working copy has no metadata directory, so you can not '.
+          'resolve metadata paths within it.'));
+    }
+
+    return Filesystem::concatenatePaths(
+      array(
+        $this->getMetadataDirectory(),
+        $to_file,
+      ));
+  }
+
+  protected function selectFromNestedWorkingCopies(array $candidates) {
+    // Normally, the best working copy in a stack is the deepest working copy.
+    // Subversion uses slightly different rules.
+    return last($candidates);
+  }
+
+  abstract public function newRepositoryAPI();
+
+}
diff --git a/src/workingcopy/ArcanistWorkingCopyPath.php b/src/workingcopy/ArcanistWorkingCopyPath.php
new file mode 100644
index 00000000..5fcd1498
--- /dev/null
+++ b/src/workingcopy/ArcanistWorkingCopyPath.php
@@ -0,0 +1,129 @@
+<?php
+
+final class ArcanistWorkingCopyPath
+  extends Phobject {
+
+  private $path;
+  private $mode;
+  private $data;
+  private $binary;
+  private $dataAsLines;
+  private $charMap;
+  private $lineMap;
+
+  public function setPath($path) {
+    $this->path = $path;
+    return $this;
+  }
+
+  public function getPath() {
+    return $this->path;
+  }
+
+  public function setData($data) {
+    $this->data = $data;
+    return $this;
+  }
+
+  public function getData() {
+    if ($this->data === null) {
+      throw new Exception(
+        pht(
+          'No data provided for path "%s".',
+          $this->getDescription()));
+    }
+
+    return $this->data;
+  }
+
+  public function getDataAsLines() {
+    if ($this->dataAsLines === null) {
+      $lines = phutil_split_lines($this->getData());
+      $this->dataAsLines = $lines;
+    }
+
+    return $this->dataAsLines;
+  }
+
+  public function setMode($mode) {
+    $this->mode = $mode;
+    return $this;
+  }
+
+  public function getMode() {
+    if ($this->mode === null) {
+      throw new Exception(
+        pht(
+          'No mode provided for path "%s".',
+          $this->getDescription()));
+    }
+
+    return $this->mode;
+  }
+
+  public function isExecutable() {
+    $mode = $this->getMode();
+    return (bool)($mode & 0111);
+  }
+
+  public function isBinary() {
+    if ($this->binary === null) {
+      $data = $this->getData();
+      $is_binary = ArcanistDiffUtils::isHeuristicBinaryFile($data);
+      $this->binary = $is_binary;
+    }
+
+    return $this->binary;
+  }
+
+  public function getMimeType() {
+    if ($this->mimeType === null) {
+      // TOOLSETS: This is not terribly efficient on real repositories since
+      // it re-writes files which are often already on disk, but is good for
+      // unit tests.
+
+      $tmp = new TempFile();
+      Filesystem::writeFile($tmp, $this->getData());
+      $mime = Filesystem::getMimeType($tmp);
+
+      $this->mimeType = $mime;
+    }
+
+    return $this->mimeType;
+  }
+
+
+  public function getBasename() {
+    return basename($this->getPath());
+  }
+
+  public function getLineAndCharFromOffset($offset) {
+    if ($this->charMap === null) {
+      $char_map = array();
+      $line_map = array();
+
+      $lines = $this->getDataAsLines();
+
+      $line_number = 0;
+      $line_start = 0;
+      foreach ($lines as $line) {
+        $len = strlen($line);
+        $line_map[] = $line_start;
+        $line_start += $len;
+        for ($ii = 0; $ii < $len; $ii++) {
+          $char_map[] = $line_number;
+        }
+        $line_number++;
+      }
+
+      $this->charMap = $char_map;
+      $this->lineMap = $line_map;
+    }
+
+    $line = $this->charMap[$offset];
+    $char = $offset - $this->lineMap[$line];
+
+    return array($line, $char);
+  }
+
+}
diff --git a/support/init/init-arcanist.php b/support/init/init-arcanist.php
new file mode 100644
index 00000000..563ef1e3
--- /dev/null
+++ b/support/init/init-arcanist.php
@@ -0,0 +1,6 @@
+<?php
+
+require_once dirname(__FILE__).'/init-script.php';
+
+$runtime = new ArcanistRuntime();
+return $runtime->execute($argv);
diff --git a/support/init/init-script.php b/support/init/init-script.php
index 77ed7d03..a8c800f7 100644
--- a/support/init/init-script.php
+++ b/support/init/init-script.php
@@ -1,101 +1,115 @@
 <?php
 
 function __arcanist_init_script__() {
   // Adjust the runtime language configuration to be reasonable and inline with
   // expectations. We do this first, then load libraries.
 
   // There may be some kind of auto-prepend script configured which starts an
   // output buffer. Discard any such output buffers so messages can be sent to
   // stdout (if a user wants to capture output from a script, there are a large
   // number of ways they can accomplish it legitimately; historically, we ran
   // into this on only one install which had some bizarre configuration, but it
   // was difficult to diagnose because the symptom is "no messages of any
   // kind").
   while (ob_get_level() > 0) {
     ob_end_clean();
   }
 
   error_reporting(E_ALL | E_STRICT);
 
   $config_map = array(
     // Always display script errors. Without this, they may not appear, which is
     // unhelpful when users encounter a problem. On the web this is a security
     // concern because you don't want to expose errors to clients, but in a
     // script context we always want to show errors.
     'display_errors'              => true,
 
     // Send script error messages to the server's `error_log` setting.
     'log_errors'                  => true,
 
     // Set the error log to the default, so errors go to stderr. Without this
     // errors may end up in some log, and users may not know where the log is
     // or check it.
     'error_log'                   => null,
 
     // XDebug raises a fatal error if the call stack gets too deep, but the
     // default setting is 100, which we may exceed legitimately with module
     // includes (and in other cases, like recursive filesystem operations
     // applied to 100+ levels of directory nesting). Stop it from triggering:
     // we explicitly limit recursive algorithms which should be limited.
     //
     // After Feb 2014, XDebug interprets a value of 0 to mean "do not allow any
     // function calls". Previously, 0 effectively disabled this check. For
     // context, see T5027.
     'xdebug.max_nesting_level'    => PHP_INT_MAX,
 
     // Don't limit memory, doing so just generally just prevents us from
     // processing large inputs without many tangible benefits.
     'memory_limit'                => -1,
 
     // See T13296. On macOS under PHP 7.3.x, PCRE currently segfaults after
     // "fork()" if "pcre.jit" is enabled.
     'pcre.jit' => 0,
   );
 
   foreach ($config_map as $config_key => $config_value) {
     ini_set($config_key, $config_value);
   }
 
+  $php_version = phpversion();
+  $min_version = '5.5.0';
+  if (version_compare($php_version, $min_version, '<')) {
+    echo sprintf(
+      'UPGRADE PHP: '.
+      'The installed version of PHP ("%s") is too old to run Arcanist. '.
+      'Update PHP to at least the minimum required version ("%s").',
+      $php_version,
+      $min_version);
+    echo "\n";
+
+    exit(1);
+  }
+
   if (!ini_get('date.timezone')) {
     // If the timezone isn't set, PHP issues a warning whenever you try to parse
     // a date (like those from Git or Mercurial logs), even if the date contains
     // timezone information (like "PST" or "-0700") which makes the
     // environmental timezone setting is completely irrelevant. We never rely on
     // the system timezone setting in any capacity, so prevent PHP from flipping
     // out by setting it to a safe default (UTC) if it isn't set to some other
     // value.
     date_default_timezone_set('UTC');
   }
 
   // Adjust `include_path`.
   ini_set('include_path', implode(PATH_SEPARATOR, array(
     dirname(dirname(__FILE__)).'/externals/includes',
     ini_get('include_path'),
   )));
 
   // Disable the insanely dangerous XML entity loader by default.
   if (function_exists('libxml_disable_entity_loader')) {
     libxml_disable_entity_loader(true);
   }
 
   $root = dirname(dirname(dirname(__FILE__)));
   require_once $root.'/src/init/init-library.php';
 
   PhutilErrorHandler::initialize();
 
   PhutilErrorHandler::initialize();
 
   // If "variables_order" excludes "E", silently repair it so that $_ENV has
   // the values we expect.
   PhutilExecutionEnvironment::repairMissingVariablesOrder();
 
   $router = PhutilSignalRouter::initialize();
 
   $handler = new PhutilBacktraceSignalHandler();
   $router->installHandler('phutil.backtrace', $handler);
 
   $handler = new PhutilConsoleMetricsSignalHandler();
   $router->installHandler('phutil.winch', $handler);
 }
 
 __arcanist_init_script__();