pr-merge-base

Smart Merge to Base Branch

Merge one or more PRs into the base branch (main/master) using queue-like sequencing.

Process

1. Detect base branch: Identify the default branch (main, master, or repo-specific) via git remote show origin or repo conventions.

1. Enumerate PRs: List all PRs to merge. For each, fetch the latest HEAD.

1. Create checkpoint: Record the current base branch tip as a rollback point.

`` CHECKPOINT=$(git rev-parse HEAD) ``

1. Create integration branch: Work on a temporary branch to validate before touching base.

`` git checkout -b merge-queue/<timestamp> <base> ``

1. Determine merge order:
2. If the user specifies an order, use that.
3. Otherwise, compute dependency/topological order (if PR B depends on PR A, merge A first).
4. If PRs are independent with no clear ordering, present the list and ask the user to confirm or reorder before proceeding.

1. Sequential merge with conflict handling — for each PR in order:

a. Attempt git merge --no-ff <pr-branch> into the integration branch. b. If merge succeeds cleanly, continue to next PR. c. If conflicts occur:

• Analyze each conflict file using difft and codebase context.
• Apply resolution using structural understanding (prefer base for formatting, PR for logic).
• If a conflict cannot be resolved with confidence, abort this merge (git merge --abort), stop and report the conflict to the user with both sides and a recommended resolution.

d. After each successful merge, verify the build still passes (if build commands are available).

1. Validate integration branch: Once all PRs are merged on the integration branch, run full build/test suite if available.

1. Report results: Present the validated integration branch to the user. Do NOT advance the base branch automatically — only update base if the user explicitly requests it.

1. Abort conditions — stop the queue and report if:
2. A conflict cannot be safely auto-resolved.
3. A post-merge build/test fails.
4. A PR has been superseded or closed.

Roll back: git checkout <base> && git branch -D merge-queue/<timestamp> — base remains untouched at checkpoint.

Output

Report for each PR: merged successfully, conflicts resolved (with details), or blocked (with reason).