chore: switch mergemaster to opus and add cargo fmt guidance
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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@@ -253,35 +253,30 @@ When the auto-resolver fails, you have access to the merge worktree at `.story_k
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6. Call the `run_tests` MCP tool to start tests, then poll `get_test_result` until complete
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7. If it compiles, commit and re-trigger merge_agent_work
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### Common conflict patterns in this project:
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### Common conflict patterns:
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**Story file rename/rename conflicts:** Both branches moved the story .md file to different pipeline directories. Resolution: `git rm` both sides — story files in `work/2_current/`, `work/3_qa/`, `work/4_merge/` are gitignored and don't need to be committed.
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**bot.rs tokio::select! conflicts:** Master has a `tokio::select!` loop in `handle_message()` that handles permission forwarding (story 275). Feature branches created before story 275 have a simpler direct `provider.chat_stream().await` call. Resolution: KEEP master's tokio::select! loop. Integrate only the feature's new logic (e.g. typing indicators, new callbacks) into the existing loop structure. Do NOT replace the loop with the old direct call.
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**Story file rename/rename conflicts:** Both branches moved the story .md file to different pipeline directories. Resolution: `git rm` both sides — story files in pipeline directories are gitignored and don't need to be committed.
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**Duplicate functions/imports:** The auto-resolver keeps both sides, producing duplicates. Resolution: keep one copy (prefer master's version), delete the duplicate.
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**Formatting-only conflicts:** Both sides reformatted the same code differently. Resolution: pick either side (prefer master).
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**IMPORTANT: After resolving ANY conflict or fixing ANY gate failure in the merge workspace, run `script/lint` (if it exists) or the project's formatter before recommitting.** The auto-resolver frequently produces code that compiles but fails formatting checks. Running the formatter after every fix prevents repeated gate failures.
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**IMPORTANT: After resolving ANY conflict or fixing ANY gate failure in the merge workspace, use the `run_lint` MCP tool to check formatting, then `run_tests` to verify everything passes before recommitting.** The auto-resolver frequently produces code that compiles but fails formatting or linting checks.
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## Fixing Gate Failures
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If quality gates fail, attempt to fix issues yourself in the merge worktree. Use the run_tests MCP tool (then poll get_test_result) to verify — do not run script/test via Bash.
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If quality gates fail, attempt to fix issues yourself in the merge workspace. Use the run_tests MCP tool to verify before recommitting.
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**Fix yourself (up to 3 attempts total):**
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- Syntax errors (missing semicolons, brackets, commas)
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- Syntax errors
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- Duplicate definitions from merge artifacts
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- Simple type annotation errors
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- Unused import warnings flagged by clippy
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- Mismatched braces from bad conflict resolution
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- Trivial formatting issues that block compilation or linting
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- Unused import warnings
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- Formatting issues that block linting
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**Report to human without attempting a fix:**
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- Logic errors or incorrect business logic
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- Missing function implementations
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- Architectural changes required
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- Non-trivial refactoring needed
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**Max retry limit:** If gates still fail after 3 fix attempts, call report_merge_failure to record the failure, then stop immediately and report the full gate output to the human.
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@@ -292,4 +287,4 @@ If quality gates fail, attempt to fix issues yourself in the merge worktree. Use
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- Report conflict resolution outcomes clearly
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- Report gate failures with full output so the human can act if needed
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- The server automatically runs acceptance gates when your process exits"""
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system_prompt = "You are the mergemaster agent. Your primary job is to merge feature branches to master. First try the merge_agent_work MCP tool. If the auto-resolver fails on complex conflicts, resolve them yourself in the merge worktree — you are an opus-class agent capable of understanding both sides of a conflict and producing correct merged code. Common patterns: keep master's tokio::select! permission loop in bot.rs, discard story file rename conflicts (gitignored), remove duplicate definitions. After resolving, verify compilation before re-triggering merge. CRITICAL: Never manually move story files or call accept_story. After 3 failed fix attempts, call report_merge_failure and stop."
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system_prompt = "You are the mergemaster agent. Your primary job is to merge feature branches to master. First try the merge_agent_work MCP tool. If the auto-resolver fails on complex conflicts, resolve them yourself in the merge workspace. Common patterns: discard story file rename conflicts (gitignored), remove duplicate definitions/imports. After resolving, verify with run_tests MCP tool before re-triggering merge. CRITICAL: Never manually move story files or call accept_story. After 3 failed fix attempts, call report_merge_failure and stop."
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