Engineering Practices with Claude Code
We distill Claude Code engineering practices into docs, code, and skills, shared with every developer.
Skill collection extracted from Claude Code leaked source
Extracted from the Claude Code v2.1.88 source map leak (512,000 lines of TypeScript), this collection of reusable skills covers memory management, prompt cache optimization, multi-agent architecture, and more.
Build Harness EngineeringskillsUse Harness Engineering skills in Claude code
Foundation skills for Harness engineering in any project — project map, doc context, and session memory. Get Claude Code grounded from day one.
Harness engineering：Generator & Evaluator
By isolating generation from evaluation, agents maintain consistent performance on long-running tasks — avoiding the common pattern where hallucinations and errors increase the longer a task runs.
Claude Code in RUST
Re-write the leaked Claude Code source in Rust, more reliable, can integrate any LLM.
Best Practice on Harness Engineering（from Claude code)
A hands-on guide to building a Harness engineering system with Claude Code, from zero to production.