harness-evolver
Listed in Community
Autonomous LLM agent optimization using LangSmith. Spawns 5 parallel proposers in git worktrees, evaluates candidates via LangSmith experiments, and merges winners automatically. Includes evaluator agent (LLM-as-judge via langsmith-cli), critic, architect, and testgen agents. No external API keys needed beyond LangSmith.
Where this came from
- Listing read from:
- https://raw.githubusercontent.com/anthropics/claude-plugins-community/2285a368b0eab744111db241f9a2273a9d34f233/.claude-plugin/marketplace.json
- Source:
- https://github.com/raphaelchristi/harness-evolver/tree/87fa7612358acccb01d34abf72426a7e47329642
- Homepage (as listed):
- https://github.com/raphaelchristi/harness-evolver
- Read on:
- 15 August 2026