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/templates/game-brief.md

@@ -4,7 +4,7 @@
 THE ONE-PAGE BRIEF. At the `minimal` workflow tier this is the ENTIRE design doc —
 it replaces the full concept doc, systems decomposition, and per-system GDDs.
 Keep it to one screen. If a field needs a second paragraph, you're writing a GDD,
-not a brief. Fill every REQUIRED field; the two RECOMMENDED one-liners are cheap
+not a brief. Fill every REQUIRED field; the three RECOMMENDED one-liners are cheap
 but optional. Engine is set separately (project.yaml / /setup-engine) — don't restate it.
 
 Field set grounded in industry practice — Tim Ryan (*Anatomy of a Design Document*),
@@ -39,3 +39,5 @@ thinking and cuts ceremony), and lean/agile GDD practice.
 **Who it's for / what they feel:** [One line: the player and the feeling. e.g. "solo puzzle fans who want a cozy 20-minute sitting."]
 
 **Art & audio direction:** [One line of aesthetic intent — drives asset choices. e.g. "flat pastel vector art, lo-fi ambient."]
+
+**Reference game:** [One shipped game this is closest to, and the ~10% of it the MVP keeps. e.g. "Vampire Survivors — the auto-attack loop on one map; no meta-progression." Scoping against a real game is the fastest honest MVP check.]