agentic-eval | Apiara SkillsSkill
github/awesome-copilot28.7kagentic-eval
|
$npx clawhub@latest install agentic-eval Overview
# Agentic Evaluation Patterns
Patterns for self-improvement through iterative evaluation and refinement.
Overview
Evaluation patterns enable agents to assess and improve their own outputs, moving beyond single-shot generation to iterative refinement loops.
```
Generate → Evaluate → Critique → Refine → Output
↑ │
└──────────────────────────────┘
```
When to Use
- **Quality-critical generation**: Code, reports, analysis requiring high accuracy
- **Tasks with clear evaluation criteria**: Defined success metrics exist
- **Content requiring specific standards**: Style guides, compliance, formatting
---
Pattern 1: Basic Reflection
Agent evaluates and improves its own output through self-critique.
```python
def reflect_and_refine(task: str, criteria: list[str], max_iterations: int = 3) -> str:
"""Generate with reflection loop."""
output = llm(f"Complete this task:\n{task}")
for i in range(max_iterations):
# Self-critique
critique = llm(f"""
Evaluate this output against criteria: {criteria}
Output: {output}
Rate each: PASS/FAIL with feedback as JSON.
critique_data = json.loads(critique)
all_pass = all(c["status"] == "PASS" for c in critique_data.values())
# Refine based on critique
failed = {k: v["feedback"] for k, v in critique_data.items() if v["status"] == "FAIL"}
output = llm(f"Improve to address: {failed}\nOriginal: {output}")
**Key insight**: Use structured JSON output for reliable parsing of critique results.
Pattern 2: Evaluator-Optimizer
Separate generation and evaluation into distinct components for clearer responsibilities.
class EvaluatorOptimizer:
def __init__(self, score_threshold: float = 0.8):
self.score_threshold = score_threshold
def generate(self, task: str) -> str:
return llm(f"Complete: {task}")
def evaluate(self, output: str, task: str) -> dict:
return json.loads(llm(f"""
Evaluate output for task: {task}
Return JSON: {{"overall_score": 0-1, "dimensions": {{"accuracy": ..., "clarity": ...}}}}
def optimize(self, output: str, feedback: dict) -> str:
return llm(f"Improve based on feedback: {feedback}\nOutput: {output}")
def run(self, task: str, max_iterations: int = 3) -> str:
output = self.generate(task)
for _ in range(max_iterations):
evaluation = self.evaluate(output, task)
if evaluation["overall_score"] >= self.score_threshold:
output = self.optimize(output, evaluation)
Pattern 3: Code-Specific Reflection
Test-driven refinement loop for code generation.
def reflect_and_fix(self, spec: str, max_iterations: int = 3) -> str:
code = llm(f"Write Python code for: {spec}")
tests = llm(f"Generate pytest tests for: {spec}\nCode: {code}")
for _ in range(max_iterations):
result = run_tests(code, tests)
code = llm(f"Fix error: {result['error']}\nCode: {code}")
Evaluation Strategies
Outcome-Based
Evaluate whether output achieves the expected result.
def evaluate_outcome(task: str, output: str, expected: str) -> str:
return llm(f"Does output achieve expected outcome? Task: {task}, Expected: {expected}, Output: {output}")
LLM-as-Judge
Use LLM to compare and rank outputs.
def llm_judge(output_a: str, output_b: str, criteria: str) -> str:
return llm(f"Compare outputs A and B for {criteria}. Which is better and why?")
Rubric-Based
Score outputs against weighted dimensions.
"accuracy": {"weight": 0.4},
"clarity": {"weight": 0.3},
"completeness": {"weight": 0.3}
def evaluate_with_rubric(output: str, rubric: dict) -> float:
scores = json.loads(llm(f"Rate 1-5 for each dimension: {list(rubric.keys())}\nOutput: {output}"))
return sum(scores[d] * rubric[d]["weight"] for d in rubric) / 5
Best Practices
| **Clear criteria** | Define specific, measurable evaluation criteria upfront |
| **Iteration limits** | Set max iterations (3-5) to prevent infinite loops |
| **Convergence check** | Stop if output score isn't improving between iterations |
| **Log history** | Keep full trajectory for debugging and analysis |
| **Structured output** | Use JSON for reliable parsing of evaluation results |
Quick Start Checklist
Evaluation Implementation Checklist
Setup
- [ ] Define evaluation criteria/rubric
- [ ] Set score threshold for "good enough"
- [ ] Configure max iterations (default: 3)
Implementation
- [ ] Implement generate() function
- [ ] Implement evaluate() function with structured output
- [ ] Implement optimize() function
- [ ] Wire up the refinement loop
Safety
- [ ] Add convergence detection
- [ ] Log all iterations for debugging
- [ ] Handle evaluation parse failures gracefully