User request : $ARGUMENTS If no PR specified : Detect PR from current branch. If detection fails, report and stop. If PR is draft : Log "PR is draft, skipping" and stop. Goal Single-pass autonomous pipeline that identifies and resolves PR merge blockers: conflicts, CI failures, review comments. Each invocation handles what's currently blocking — the loop skill handles re-running for iterative convergence across invocations. Concurrency Guard After PR detection and draft check, prevent concurrent runs on the same PR. If another run is currently active, abort and log "Concurrent run detected, s…