This task is not about the problems of Phabricator, it's about design of commits :) Just a small suggestion on formalization of commits.

In out project we use prefixes for every commit. As a result, our commits have the following form:

[{type}.{moduleName}] {desc}

Fox example, in you Phabricator project, you commit may have this message:

[fix.diffusion] displaying messages in summary T15

Types of commits:

• feat (new feature)
• fix (bugfixes)
• docs (writing documentation, adding commetns to sources, etc)
• ref (refactoring)
• chore (not particularly important, maintain commits)
• you own type of commit?

These prefixes allow more quickly analyze the history of commits and find those commits which relate to a specific module of project. Maybe you also have to taste similar style of commits.