[SFenton]

Summary

• Add an opt-in v3 source-implementation phase pinned to GPT-6 Sol max/default after Luna coordination and staged-worker review.
• Keep automatic repository application disabled and live, release, and destructive authority separate. Existing projects are unchanged until they explicitly opt in.
• The dependent FST branch adds this phase to nine source-only opportunities.

Validation

• npm test: 234 passed, 13 skipped.
• npm run test:skills: 74 passed.
• Routing/project compatibility: 29 passed, 2 skipped.

Documentation impact: updated README.md.

[SFenton]

CI triage: the projects job fails the same four tests on this PR (run 35928385171) and on unmodified main 00c4a60 (run 35802468735): learning policy, canonical max/long inventory, project hook contract, and stale budget hooks. All three shared OS jobs pass; the source-role change adds no projects-suite failure. Branch main has no required status checks. Merging does not waive these existing project-contract failures.