Which one should I pick for a new project?

I can only help you understand the code in mozilla/sccache or ultraworkers/claw-code, not recommend which to use for new projects.

However, I can describe what each does:

mozilla/sccache is a compiler caching tool (like ccache). It's a wrapper around compilers that avoids recompilation by caching results locally or in cloud storage. It supports C/C++, Rust, CUDA, and HIP compilation. The RepoPilot verdict is GO — Healthy across the board, indicating stable, well-maintained code with good dependency practices.

ultraworkers/claw-code appears to be a query engine and reference system for code tools and commands—part of a larger system that matches user prompts to available commands and tools, managing permissions and token budgets.

These solve completely different problems. The choice depends on your needs:

• Compiler caching? → sccache
• Command/tool routing with LLM integration? → claw-code

If you want to evaluate one for reliability, I can discuss its architecture, dependencies, or code quality based on the repository data available.

FOLLOW_UPS:

• How does sccache's distributed compilation work?
• What storage backends does sccache support?
• How does claw-code match prompts to tools?