Refresh missing PR associations after agent turns on the thread's current branch. Preserve background policy, known PR caches, and failed-lookup backoff. Serialize status loads and refreshes to prevent stale responses from hiding a PR. Find branches pushed under their own name while still tracking the default branch.

Original work by Theo Browne with Claude Fable 5.1 in Claude Code. Takeover fixes created with GPT-6 Astra (preview) in Codex.

Co-authored-by: Theo Browne <me@t3.gg>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>