Promotes the .draft stub into a fuller 183-line reference covering six
SF patterns (Preferences, PDD, UOK Gates, Notifications, Skills-as-
Contracts, Idempotency) with SF source paths and ACE adoption notes.
Filed under docs/dev/drafts/ with a STATUS: Draft header — no active
consumer yet. SF's own priorities take precedence until ACE Coder
maintainers pull on convergence.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
