DSPy GEPA — Generate, Evaluate, Propose, Apply

GEPA is a DSPy-powered tool for evaluating, optimizing, and generating skill scenarios.

Quick Start

Requires Python 3.10+ with dspy, pyyaml, and jsonschema:

pip install dspy-ai pyyaml jsonschema

Generate New Scenarios

Point GEPA at an existing skill to generate new test scenarios:

python scripts/gepa.py generate \
  --skill-description "Creates FastAPI routers with CRUD endpoints" \
  --skill-name fastapi-router-py \
  --num-scenarios 5 \
  --output tests/scenarios/fastapi-router-py/generated.yaml

Or expand an existing scenario file with more variations:

python scripts/gepa.py generate \
  --scenarios tests/scenarios/fastapi-router-py/scenarios.yaml \
  --num-scenarios 3 \
  --output new-scenarios.yaml

Evaluate Scenarios

Score a DSPy program against scenario patterns:

python scripts/gepa_evaluate.py \
  --scenarios tests/scenarios/fastapi-router-py/scenarios.yaml

Full GEPA Loop

Evaluate baseline → optimize → evaluate optimized → save:

python scripts/gepa.py optimize \
  --scenarios tests/scenarios/fastapi-router-py/scenarios.yaml \
  --output optimized_program.json

Convert Scenarios to Dataset

python scripts/scenario_to_dataset.py \
  --scenarios tests/scenarios/fastapi-router-py/scenarios.yaml \
  --output dataset.json

Architecture

See references/gepa-architecture.md for the full GEPA loop design and DSPy mapping.

Metrics

See references/metrics.md for pattern-matching scoring details.

Example Output

See examples/sample-run.md for a complete CLI session with output.