Add initial planning files from ChatGPT research here

planning/reports/PHASE-0A-STATUS.md

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+# Phase 0A Status
+
+**Completed:** 2026-09-01
+
+## Completed statically
+
+- candidate discovery and triage,
+- deep source/document architecture review of the three finalists,
+- static privacy/network-surface review,
+- preliminary licensing/reuse review,
+- subsystem reuse matrix,
+- preliminary fork recommendation,
+- narrowed Codex validation plan.
+
+## Preliminary decision
+
+Validate **AI-DnD first as the production fork candidate**.
+
+Keep:
+- **Open Dungeon** as the fallback fork and primary UI/media reference.
+- **ai-adventure** as the state/replay/privacy architecture reference and third validation candidate.
+
+## Still requires local/Codex work
+
+- pin exact SHAs,
+- clone/install/build,
+- run actual tests,
+- verify Ollama against the user's machine,
+- runtime network capture,
+- offline operation,
+- AI-DnD strip-down experiment,
+- Open Dungeon branch-retrofit impact experiment,
+- ai-adventure Ollama/service-boundary experiment.
+
+See `PHASE-0B-CODEX-HANDOFF.md`.
+
+## Phase gate
+
+Do not finalize `TECHNICAL-DESIGN.md` v1.0 or production `BUILD-MILESTONES.md` until Phase 0B results are reviewed.