Harbormaster build logs are mostly okay up to the storage part and then garbage from there forward. In particular:

• (T5822) They should support archiving and GC.
• (T9124) They should be accessible via the API -- but note issues with T5955 for logs with ANSI character codes.
• (T9516, T8656, PHI382, T10179) The UI is generally clumsy and managing large logs is a headache.
• (T6139) Build logs should support summarization.
• (T11810) Live log output.
• (T10868) Line-anchors.

The source code CSS changes have made {P123} render a little weirdly, and it should get a pass before this finishes up.