- Commit message: the merge agent writes a concise change-summary subject (not
just the task title), and every landed squash carries board-association
trailers — `Fusion-Task-Id: <taskId>` plus the canonical lineage trailer when
the task has a lineageId — guaranteed via an idempotent amend
(ensureTaskTrailersOnHead) even if the agent omits them.
- Verify-and-fix: the merge prompt instructs the agent to run the project's
tests / type-check / lint after resolving the merge and fix any NEW failure
the merge introduced (not pre-existing breakage) before committing.
- Editable prompt: the AI merge agent's base persona is the editable "merger"
role prompt (Settings -> Prompts); the clean-room / verification / trailer
rules are always appended so a custom prompt can't drop them.
- Reviewer model: reviewer uses the project reviewer/validator model lane
(resolveValidatorSettingsModel); the bespoke merger.reviewerModel setting is
removed.
Changeset updated to cover all AI merger changes.
Tests: trailer present on landed commit (+ lineage when set), editable-prompt
incorporation, new-breakage verification wording.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
c1d558c765