eval-harness
SkillAI & modelsLets your agent test its skills and workflows with benchmarks, regression tests, and quality scores.
Available today. Use it from your connected AI after setup.
No other account needed.
Connect ahel once, and every AI you use reads what you have installed.
Then ask your AI: use the eval-harness skill
About this capability
Evaluation harness for testing agent and skill quality through structured benchmarks, regression tests, and quality scoring.
What this skill tells your AI
The instructions your AI receives, as published by a5c-ai/babysitter in library/methodologies/everything-claude-code/skills/eval-harness/SKILL.md and read by ahel’s review.
- 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)
Signals
- GitHub stars
- 2k
- Forks
- 106
- Last commit
- Sep 2026
Advanced
- Catalog kind
- skill
- Gateway key
eval-harness- Source
- github.com/a5c-ai/babysitter