Convert npm run/install/ci -> pnpm equivalents, npx -> pnpm exec, package-lock.json -> pnpm-lock.yaml across CLAUDE.md, groups/global/, docs/SPEC.md, docs/DEBUG_CHECKLIST.md, docs/BRANCH-FORK-MAINTENANCE.md, and docs/docker-sandboxes.md. Kept .npmrc and npm config references where they document real files.