Implement Phase 1 critical fixes: Response analyzer & circuit breaker
Implements all Phase 1 recommendations from expert panel review:
1. **Response Analysis Pipeline** (Martin Fowler recommendation)
- New lib/response_analyzer.sh component
- Parses Claude Code output for completion signals
- Detects test-only loops and stagnation
- Updates .exit_signals file with structured data
- Tracks confidence scores and progress indicators
2. **Circuit Breaker Pattern** (Michael Nygard recommendation)
- New lib/circuit_breaker.sh component
- Three-state pattern: CLOSED → HALF_OPEN → OPEN
- Prevents runaway token consumption
- Detects: no progress (3 loops), same errors (5 loops)
- Automatic halt with clear user guidance
- Manual reset capability
3. **Structured Output Contract** (Sam Newman recommendation)
- Updated PROMPT.md template with RALPH_STATUS format
- Defines clear JSON-parseable exit signals
- SMART criteria for completion detection
- Concrete examples for all scenarios
4. **Integration & Testing**
- ralph_loop.sh integration of both components
- 20 comprehensive BATS integration tests (all passing)
- Tests cover: signal detection, circuit states, full loop flows
- Validates Phase 1 implementation correctness
**Impact**: Solves infinite loop problem, enables reliable exit detection,
prevents token waste through systematic stagnation detection.
**Test Results**: 20/20 integration tests passing
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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