post-merge

name	post-merge
description	Post-merge integration gate — cleanup, build, test, verify issues, update memory
user-invokable	true

Post-Merge Pipeline

Run after all PRs in a batch are merged. Verifies the merged main is clean, closes out tracking work, and updates project memory.

Arguments

• No arguments: run the full pipeline
• --skip-cleanup: skip worktree/branch cleanup (already done manually)
• --skip-memory: skip the memory update step

Step 1: Fetch & Update Local

git fetch origin
git checkout main
git pull origin main

If not already on main, stash or warn before switching.

Step 2: Worktree & Branch Cleanup

1. List worktrees: git worktree list
2. For each worktree under .Codex/worktrees/:
   • Check if its branch is merged into main (git branch --merged main)
   • If merged: git worktree remove {path} then git branch -d {branch}
   • If not merged: warn the user — do NOT force-delete
3. Prune stale remote-tracking branches:

   git fetch --prune origin
   git branch -vv | grep ': gone]' | awk '{print $1}'
   

   Delete local branches whose remote is gone (only if merged).

Skip this step if --skip-cleanup is in $ARGUMENTS.

Step 3: Clean Build

IMPORTANT: Always cargo clean before pixi run build after merging multiple PRs. Stale incremental artifacts from worktrees cause spurious "can't find crate" errors with maturin.

pixi run clean
pixi run build

If pixi run build fails, diagnose and fix on main immediately.

Step 4: Rust Tests

cargo test --workspace --exclude nereids-python

All tests must pass. If failures occur:

1. Diagnose whether the failure is from our changes or pre-existing
2. Fix on main, commit with descriptive message
3. Re-run tests to confirm

Step 5: Python Tests

pixi run test-python

Common failure mode: Python test match= regex patterns don't align with changed Rust error messages. Fix the test patterns to match actual messages.

If failures occur, fix, commit, push, and re-run.

Step 6: Push Fixes (if any)

If Steps 3-5 required fixes on main:

git push origin main

Step 7: Verify Issue Closure

For each issue that was part of this batch:

gh issue view {number} --json state --jq '.state'

• If CLOSED: confirmed (auto-closed by PR merge)
• If OPEN: close with comment referencing the merged PR:

  gh issue close {number} -c "Resolved in PR #{pr_number}"
  

Also check if any parent epics should be closed (all sub-issues done).

Step 7.5: Add Issues to Project Tracker

Add all closed issues AND any newly created deferred-P2 issues to the NEREIDS Development project (number 8):

gh project item-add 8 --owner ornlneutronimaging \
  --url https://github.com/ornlneutronimaging/NEREIDS/issues/{number}

Repeat for every issue number involved in this batch (closed + deferred). This keeps the project board in sync for velocity tracking.

Step 8: Update Project Memory

Unless --skip-memory is in $ARGUMENTS:

1. Read MEMORY.md
2. Update the "Project Phase Status" section:
   • Add the new batch entry with commit hash, PR numbers, closed issues
   • Update the test count line
3. Add any new "Multi-AI Review Pipeline Lessons" discovered during this batch

Step 9: Report

Present a summary table:

Gate	Status
pixi run build	PASS/FAIL
cargo test	PASS — N tests (M ignored)
pixi run test-python	PASS — N tests
Issues closed	#X, #Y, #Z
Fixes on main	N commits (if any)

If all gates pass: "Post-merge integration complete. Main is clean."