Wires the AI commit-body generator (introduced in 52928ff5e) to the
existing dedicated title-summarization model lane, and updates the
settings UI so users understand the model is now used for two
short-summary jobs instead of just one. Also de-duplicates the
project-scope settings UI which was exposing the same model setting in
two places.
Engine (merger.ts):
- aiGenerateCommitBody now prefers settings.titleSummarizerProvider /
titleSummarizerModelId over the merger's default model. The
summarization lane is the right tier for this work — small, fast,
cheap. Falls back to the default merger model when the summarization
lane is unset.
Dashboard (SettingsModal.tsx):
- MODEL_LANES summarization lane label updated:
"Title Summarization Model" → "Title and Git Commit Message
Summarization Model". Helper text updated to mention the dual purpose
(auto-generated task titles + fallback merge commit message bodies).
This change flows through automatically to BOTH the global model
lanes view and any project-scope rendering of MODEL_LANES.
- Removed the duplicate summarization picker from the project-scope
Model Lanes section: previously it appeared once under Model Lanes
AND once under "AI Summarization". Now lives only in the dedicated
picker so users have a single source of truth in project scope.
- The dedicated picker section heading + description rewritten:
"AI Summarization" → "AI Title and Git Commit Message Summarization",
with a paragraph explaining both jobs the model performs.
- Inner dropdown label updated for consistency.
Tests + checks: engine 2887/2887 pass, dashboard typecheck clean,
workspace lint clean.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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