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claude-harness
A Claude Code skill that builds features autonomously using a Planner - Generator - Evaluator loop. Based on Anthropic's [harness design framework](https://www.anthropic.com/engineering/harness-design-long-running-apps) for long-running LLM applications.
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InstallSKILLInstall as a Claude Code skill
Universal installANY TOOL
$ npx skillcity@latest Zzzlaya/claude-harnessAuto-detects the skill or MCP server in this repo and installs it for Claude Code, Codex, Cursor, Cline, OpenCode, Gemini CLI, Anti-Gravity, OpenClaw and Hermes.
Requires Node.js 18+ (ships with npx).
Or install manually
# Install into ~/.claude/skills/ mkdir -p ~/.claude/skills/claude-harness curl -fsSL https://raw.githubusercontent.com/Zzzlaya/claude-harness/main/SKILL.md -o ~/.claude/skills/claude-harness/SKILL.md
Loading README…
Ask a simulated agent to run this skill. It loads the real SKILL.md and reasons over your task with NVIDIA.
claude-harness — sandboxAI sandbox
Pick a quick prompt below or type your own — watch the agent execute this skill step by step.
guest@skillcity:~$Try a prompt