Covers the CI watch: merging a green watched PR (never one GitHub itself will land), waiting out pending and freshly check-less PRs, leaving closed PRs and stale runs alone, remembering refused merges per head commit, starting one fix session per failing head with a cap of two per PR, standing down when the failure cannot be pinned, and logging merges every time but repeated refusals once.

## Before writing SPEC.md files

Read https://raw.githubusercontent.com/brillout/sdd/refs/heads/main/sdd.md
