- Added get_pull_request() to GitHubBackend and GitHubClient via /repos/{repo}/pulls/{number}.
- Extended PullRequestInfo parsing to include author and head_repo values.
- Added /gh/v1/pull_request proxy route and proxy client forwarding for pull-request retrieval.
- Added tests for get_pull_request payload parsing and proxy client/server round-trip coverage.
- Added maintainer directive flow with config fields, mention parsing, and directive prompt templates.
- Propagated directive payloads into webhook handling, tasks, and worker prompts for triage/review actions.
- Added admission/dedupe caps and `INACTIVE_EVENT_STATES` checks to prevent duplicate or active-event requeue/retry conflicts.
- Refactored push/PR host tooling to use guarded branch checks and reject unsafe identity or ancestry mismatches.
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