Anchor merge direction in describe system prompt#17
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Pull request overview
This PR updates the describe system prompt to explicitly anchor merge direction so per-file descriptions consistently describe changes from the fork’s base commit to the incoming upstream commit (and avoid inverted descriptions).
Changes:
- Defines Base (before) as
merge_info.target_branch_shaonmerge_info.target_branch. - Defines Incoming (after) as
merge_info.merge_commit(alsomerge_context.merge_commit) and mandates describing auto-merged files as base → incoming. - Instructs the agent to leave a file’s description empty when direction is uncertain rather than guessing.
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This change improves the invalid merge description for the following PRs: |
The describe prompt let the model infer direction from filenames and commit summaries, which produced inverted per-file descriptions. Name target_branch_sha as base and merge_commit as incoming explicitly, require descriptions to follow base->incoming, and instruct the agent to leave a file's description empty when uncertain rather than guess.
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igorsol
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May 26, 2026
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The describe prompt let the model infer direction from filenames and commit summaries, which produced inverted per-file descriptions.
Name target_branch_sha as base and merge_commit as incoming explicitly, require descriptions to follow base->incoming, and instruct the agent to leave a file's description empty when uncertain rather than guess.