- Add CI enforcement notice for PR titles and commit subjects
- Increase description limit from 50 to 70 characters
- Add `perf`, `build`, `ci`, and `deps` commit types

- Add mandatory PR description fields (linked issue, description, AI disclosure, checklist)
- Document PR Sentinel automated validation rules and timeline
- Clarify PR description guidelines with updated template sections
- Add examples using closing keywords for issue linking

…ucture

- Add automated PR Sentinel checks notice with compliance requirements and 3-day auto-close timeline
- Restructure template sections with better formatting and clearer guidance
- Add Testing section for reproducible steps
- Improve placeholder text with closing keyword examples
- Minor wording improvements in checklist items

- Add Conventional Commits validation for PR titles and commit subjects
- Add linked issue check requiring closing keywords
- Add AI disclosure section validation
- Add commit description length check (max 70 chars)
- Add Co-authored-by trailer check
- Add bot exemption and escalation logic

- Add tests for PR title, linked issue, and AI disclosure validation
- Add tests for commit subject length and Co-authored-by trailer checks
- Add tests for bot exemption and escalation logic
- Add tests for date helper functions (ISO/epoch conversion)
- Add shared assertion helpers for test suites

…tration

- Add constants for label, markers, and dry-run mode
- Add gh CLI wrapper with dry-run support
- Add functions to find, create, update, and delete status comments
- Add functions to add and remove PR Sentinel label
- Add status comment body renderer with contextual "How to fix" links

- Add evaluate-pr.sh to run all PR Sentinel checks and output JSON verdict
- Check PR title, linked issue, AI disclosure, commit subjects, and Co-authored-by trailers
- Detect merge commits and flag for rebase
- Support bot exemption and draft detection
- Add test suite covering compliant/non-compliant PRs, topic filtering, and edge cases

- Add report-pr.sh to evaluate PRs and apply status comment/label
- Skip draft PRs and clear prior artifacts when converted to draft
- Post/update consolidated status comment for non-compliant PRs
- Apply 'pr-sentinel: needs updates' label when non-compliant and not exempt
- Exit non-zero for non-compliant, non-exempt PRs to fail CI checks

- Add escalate-pr.sh to escalate or close non-compliant PRs based on status comment age
- Escalate after 24 hours by adding close-countdown banner with 3-day deadline
- Auto-close after 72 hours if issues remain unresolved
- Skip draft PRs and already-escalated comments to avoid duplicate notifications
- Add tests for escalation marker detection and age-based decision logic

…rcement

- Run on pull_request_target with permissions to comment and label
- Support manual dispatch for batch evaluation or dry-run mode
- Evaluate PRs for compliance with title, issue link, AI disclosure, and commit requirements
- Post consolidated status comments and apply 'pr-sentinel: needs updates' label when non-compliant
- Fail CI checks for non-compliant PRs to block merge

…rcement

- Run on pull_request_target with permissions to comment and label
- Support manual dispatch for batch evaluation or dry-run mode
- Evaluate PRs for compliance with title, issue link, AI disclosure, and commit requirements
- Post consolidated status comments and apply 'pr-sentinel: needs updates' label when non-compliant
- Fail CI checks for non-compliant PRs to block merge

This will avoid the issue 1234 to be linked

The check now ignores closing keywords inside inline code (`Closes thunderbird#1234`) or fenced code blocks, matching GitHub's actual issue-linking behavior where code-enclosed keywords do not create links.

This will allow GitHub to auto-link the commit

…lose workflow

- Add app token generation step with fallback to github.token
- Set botmobile environment for both sentinel workflows
- Move GH_TOKEN from workflow-level to step-level env vars