claude-code-evolution

Tracks how Claude Code changed version over version and ports the strongest architecture, prompt-engineering, and skill-system ideas into the OpenClaw platform (analysis scale: 1,903 files, ~512k lines). The best single source for 'what the leading harness added over time' insights.

View source on GitHub

Key takeaways

• 01

  Version-over-version deltas reveal which harness features earned their keep

• 02

  Prompt and skill-system changes are catalogued alongside code changes

• 03

  Demonstrates migrating harness patterns to another platform

Flows built on this research

Harness Engineering

Version Your Harness and Track Behavior

Treat prompts, tools, and loop logic as versioned, changelogged artifacts - so behavior changes are decisions, not surprises.

4 steps · 45-75 minutes

Harness Engineering

Cost Control: Model Routing and Effort Tiers

Route work to the cheapest model that can do it and match reasoning effort to task difficulty - with quality guardrails.

4 steps · 90-120 minutes