Eval Harness
Overview
Evaluation harness methodology adapted from the Everything Claude Code project. Provides structured frameworks for benchmarking agent performance, testing skill quality, and running regression suites.
Evaluation Types
1. Agent Performance Benchmark
- Define test cases with known-correct outputs
- Run agent against each test case
- Score: accuracy, completeness, relevance
- Compare against baseline performance
- Track performance over time
2. Skill Quality Testing
- Verify skill instructions produce expected outcomes
- Test edge cases and boundary conditions
- Measure consistency across multiple runs
- Check for harmful or incorrect outputs
- Validate against ground truth
3. Regression Suite
- Collection of previously-passing test cases
- Run after any agent/skill modification
- Flag regressions with before/after comparison
- Maintain pass rate threshold (>= 95%)
4. Process Verification
- End-to-end process execution with known inputs
- Verify each phase produces expected outputs
- Check task ordering and dependency satisfaction
- Measure total execution time
Quality Scoring
Accuracy Score (0-100)
- Correctness of output vs expected
- Partial credit for partially correct outputs
- Penalty for hallucinated or fabricated content
Completeness Score (0-100)
- Coverage of required output elements
- Missing sections flagged and scored
- Bonus for useful additional context
Consistency Score (0-100)
- Run same input 3 times
- Compare outputs for semantic similarity
- Flag inconsistencies
Composite Score
- (accuracy 0.4 + completeness 0.3 + consistency * 0.3)
- Threshold: 80 to pass
When to Use
- After creating new agents or skills
- After modifying existing agents or skills
- Periodic quality audits
- Before promoting skills to production
Agents Used
- Used by process-level evaluation orchestrators
- No specific agent dependency (evaluates other agents)