- Analyze existing docs (README.md CONTRIBUTING snippets)
- Create detailed plan
- Get user approval
- Create CONTRIBUTING.md at root (detailed standards, workflow, PR)
- Update root README.md (link to CONTRIBUTING.md, shortened section)
- Update TODO with completion
Result: Full contributor guide in CONTRIBUTING.md. Covers Rust/Soroban standards (fmt/clippy/check-effects-interact), TS, naming tables, git branches, PR template/process.
Meets AC: Clear guidelines, easy for new contributors.