- Shortcuts carry an optional refinement_key (templates model + expansion);
editor gains a "Use non-default refinement key" checkbox + field.
- Project-level Refinement key field (Studio engine card) wired through
server -> builder into FunPackRefinementKeyLoader (settable in any mode).
- Per-scene key attribution (prompt_scene_shortcut_keys): keys whose shortcuts
fired in a scene; anchor keys count for every scene; union fallback on
rewrite/count mismatch.
- Per-scene conditioning merge: steer with each participating key's state and
average (one key = substitute, none = default), replacing the default-key
relative steering for keyed scenes.
- Multi-key rating: full per-scene learning suite + value fn trained into each
participating key's state.
- Tests for shortcut key surfacing, expansion tagging, per-scene attribution,
fallback, and keyloader injection.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
