harness-evolver

PackAI & models

Improves your agent's prompts by testing candidate versions against each other and keeping the best performer.

Unavailable. Delivery for this kind is on the roadmap — not serving yet.

Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

About this app

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 ne

Signals

GitHub stars: 4k
Forks: 312
Last commit: Aug 2026

Advanced

Item type: plugin
Key: anthropics-claude-plugins-community-harness-evolver
Source: github.com/anthropics/claude-plugins-community

github.com/anthropics/claude-plugins-community