feat: implement UAT validation with self-healing fix loop
Add complete UAT validation workflow implementation:
- scripts/uat-validate.sh: Core UAT validation script with scenario
classification, automated execution, and self-healing fix loop
- scripts/epic-execute.sh: Add metrics instrumentation for story
execution tracking (init, update, finalize metrics)
- scripts/epic-chain.sh: Integrate UAT gate after each epic with
configurable blocking mode, and add report generation phase
New workflow step documentation:
- step-01-load-uat.md: UAT document loading and parsing
- step-02-classify-scenarios.md: Scenario classification logic
- step-03-execute-scenarios.md: Automated scenario execution
- step-04-evaluate-gate.md: Gate evaluation and fix loop
- step-05-report-results.md: Metrics and signal output
Key features:
- Gate modes: quick (automatable only), full (+ semi-auto), skip
- Self-healing: spawns fresh Claude context for targeted fixes
- Metrics: YAML files track execution stats and UAT results
- Signals: parseable output for orchestration (UAT_GATE_RESULT, etc.)
- Handoffs: include UAT status and fix context references
Also fixes lint/format issues in pre-existing files.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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