PRD v3: future-proofing roadmap — event journal, rich catalog, tool registry
Phases 9-15 designed based on "future regret" analysis:
- Phase 9: Event journal (append-only mutation history — can't retrofit)
- Phase 10: Rich catalog v2 (ownership, sensitivity, lineage, freshness)
- Phase 11: Embedding versioning (model-proof vector layer)
- Phase 12: Tool registry (governed agent actions via MCP)
- Phase 13: Security & access control (field-level, row-level, audit)
- Phase 14: Schema evolution with AI migration rules
- Phase 15+: Federated query, DB connectors, OCR, fine-tuned models
8 design principles: store truth openly, describe richly, never destroy
evidence, secure centrally, expose through tools, version everything,
unstructured first-class, separate storage/compute/intelligence.
ADR-012 through ADR-016 documenting key future-proofing decisions.
Updated benchmarks: 2.47M rows, hot cache 9.8x speedup.
Updated operating rules: cheap-now/expensive-later built first.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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