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feat: label session branches by first message - #449

Merged
agegr merged 2 commits into
agegr:mainfrom
111-test-111:pr/session-tree-branch-labels
Aug 11, 2026
Merged

feat: label session branches by first message#449
agegr merged 2 commits into
agegr:mainfrom
111-test-111:pr/session-tree-branch-labels

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@111-test-111

@111-test-111 111-test-111 commented Aug 9, 2026 •
edited by agegr
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What

Makes in-session branches recognizable in BranchNavigator:

  • Extracts the session-tree projection from app/api/sessions/[id]/route.ts into lib/project-tree.ts
  • Projects a bounded branchPreview from the first message on each compressed branch segment, so the UI can label the branch without retaining that full message node
  • Keeps selection anchored to the compressed branch representative rather than the message used only for its label
  • Supports multi-root trees, including roots that begin with metadata such as model_change or session_info

Payload safety

  • Preview text is normalized and capped at 40 characters
  • Image data, thinking blocks, tool arguments, and unknown role strings are not copied from compressed label-source messages
  • The original root / branch-point / leaf projection shape and compressedEntryIds behavior are preserved

Validation

  • 16 focused projection and navigator tests
  • PR head: 440 tests pass; tsc --noEmit and eslint pass
  • Temporary merge with latest main: 466 tests pass; tsc --noEmit and eslint pass

Notes

This rewrites the inlined projection in app/api/sessions/[id]/route.ts. A companion PR touching the same route imports/response may need a trivial rebase if it lands first.

111-test-111 and others added 2 commits August 9, 2026 23:20
@111-test-111
feat: label session branches by first message
8a6141c 
Extract the session-tree projection into lib/project-tree.ts and keep the
first message entry of each diverging arm, so BranchNavigator can label each
branch with the message it diverged with. BranchNavigator renders those
first-message labels and supports multi-root trees.
@agegr
fix: keep branch previews lightweight
582f768
@agegr
agegr merged commit c87a9a4 into agegr:main Aug 11, 2026
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2 participants

@111-test-111 @agegr