Release 1.1.2 — the default path works end to end

Fix release for 1.1.1: the minimal path end to end, engine commands that
run on Godot, Unity and Unreal, hook warnings you can see, and verdicts
that say when they could not check. Details in CHANGELOG.md; upgrade
steps in UPGRADING.md (v1.1.1 → v1.1.2).

Fixes #67
Fixes #131

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WuJn2FdynEybfL5KC697nJ

.claude/docs/director-gates/ad-art-bible.md

@@ -2,7 +2,7 @@
 
 # AD-ART-BIBLE — Art Bible Sign-Off
 
-Agent: `art-director` | Model tier: Sonnet | Domain: Visual identity, art bible, visual production readiness
+Agent: `art-director` | Model tier: session (inherit) | Domain: Visual identity, art bible, visual production readiness
 
 **Trigger**: After the art bible is drafted (`/art-bible`), before asset production begins
 
@@ -10,7 +10,7 @@ Agent: `art-director` | Model tier: Sonnet | Domain: Visual identity, art bible,
 - Art bible path (`design/art/art-bible.md`)
 - Game pillars and core fantasy
 - Platform and performance constraints (`platform.*` and `performance.*` from `project.yaml`, falling back to `.claude/docs/technical-preferences.md`)
-- Visual identity anchor chosen during brainstorm (from `design/gdd/game-concept.md`)
+- Visual identity anchor chosen during brainstorm (from `design/gdd/game-concept.md`; if there is no `design/gdd/game-concept.md`, pass the "Art & audio direction" line of `design/game-brief.md` instead)
 
 **Prompt**:
 > "Review this art bible for completeness and internal consistency. Does the color