Update planning package after Phase 0B

planning/RESEARCH-PLAN.md

@@ -1,9 +1,11 @@
 # Adventure Storyteller — Phase 0 Research Plan
 
-**Status:** Ready for execution  
+**Status:** Complete — Phase 0 closed 2026-09-01  
 **Phase:** 0 — Research, Validation & Architecture  
 **Goal:** Determine what to build, what to fork/reuse, and finalize the technical design before production implementation begins.
 
+**Outcome:** AI-DnD selected as the production base; non-destructive head-cursor history and explicit typed narrative-state events selected; production milestones now defined in `BUILD-MILESTONES.md`.
+
 ## 1. Why Phase 0 Exists
 
 The project has several promising open-source starting points. They differ substantially in:
@@ -28,6 +30,26 @@ Phase 0 therefore ends when we can answer:
 
 No production feature work should begin before that decision unless explicitly authorized.
 
+## 1A. Phase 0 Completion Summary
+
+Phase 0A static research and Phase 0B local validation are complete.
+
+Final dispositions:
+
+- AI-DnD — production fork/base at `d72f7c1bda0f34fccd84afb7a25c34eb01c901de`.
+- ai-adventure — primary implementation reference for authoritative typed state events, checkpoint/head/replay semantics, and narrow local-only behavior.
+- Open Dungeon — UX and future-media reference only.
+
+Critical Phase 0B prototype results:
+
+- non-destructive Undo/Redo with a movable active head was demonstrated on AI-DnD without deleting history and without breaking branch-scoped memory isolation,
+- export/import must preserve active head position,
+- AI-DnD's relative-delta state protocol should not be retained as the generic narrative-state contract,
+- imported knowledge should be a separate subsystem rather than Story Cards,
+- runtime offline hardening is required for tokenizer data and fonts.
+
+The original milestone text below is retained as the research execution record.
+
 ## 2. Candidate Repositories
 
 Initial candidates:
@@ -575,4 +597,22 @@ Phase 0 is complete only when:
 - the technical design is v1.0,
 - the actual implementation milestone plan has been written.
 
-At that point, production implementation can begin.
+At that point, production implementation becomes eligible to begin, but still requires explicit approval and a milestone-specific execution prompt.
+
+
+## 17. Final Phase 0 Closure Record
+
+Phase 0 definition of done is satisfied for architecture/planning purposes:
+
+- finalists cloned and run,
+- test suites measured,
+- Ollama exercised locally,
+- offline/network behavior investigated,
+- critical history/state uncertainties prototyped,
+- fork/build strategy selected,
+- specification revised to v1.0,
+- technical design revised to v1.0,
+- production build milestones written,
+- foundational ADRs updated/added.
+
+No production implementation prompt is part of this research plan.