Add shared bible submodule, rename local bible to bible-local

- Add bible.git as submodule at bible/
- Rename bible/ → bible-local/ (project-specific architecture)
- Update CLAUDE.md to reference both bible/ and bible-local/
- Add AGENTS.md for Codex with same structure

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bible-local/README.md

@@ -0,0 +1,21 @@
+# Project Bible
+
+The Bible is the single source of truth for this project's architecture.
+
+## Documentation Rules
+
+- All architecture decisions must be recorded in this Bible.
+- The documentation language is English only.
+- If a decision is superseded, update the Bible immediately and remove or mark obsolete content.
+- Do not duplicate architecture documentation in `README.md`, `claude.md`, or other files.
+
+## Structure
+
+- `governance/documentation-policy.md` - mandatory rules for maintaining architecture docs.
+- `architecture/system-overview.md` - current scope, boundaries, and high-level system composition.
+- `architecture/api-surface.md` - HTTP API and UI route contracts.
+- `architecture/runtime-flows.md` - ingest, timeline, status, and failure invariants.
+- `architecture/ui-information-architecture.md` - required UI structure and semantics.
+- `architecture/data-model.md` - domain language, core tables, and migration boundaries.
+- `docs/` - migrated operational and implementation documentation (formerly `/docs`).
+- `decisions/README.md` - how to capture new and updated architecture decisions.