- Add uat-validator agent (Quinn) with triggers for validation, reporting, and fix context generation
- Add 5-validation/uat-validate workflow with scenario classification and shell execution
- Add SM agent trigger [UV] for uat-validate workflow
- Add architecture docs for UAT integration with epic-chain
- Support automatic quick-dev fix sessions when UAT gate fails
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>