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David Snelling bb4c0bfb99 fix: add NULL hash guards to prevent v5.3.3 regression 
Fixed critical bug where CommitObject.walk() didn't guard against NULL parent
hash, causing "Blob metadata not found: 0000...0000" error when calling
getHistory() on fresh databases.

This is a SYSTEMATIC fix, not just a patch:

Infrastructure:
- src/storage/cow/constants.ts: NEW - NULL_HASH constant and utilities
- Prevents hardcoding errors
- Provides isNullHash() for semantic checks

Bug Fixes:
- src/storage/cow/CommitObject.ts: Guard NULL parent in walk()
- src/storage/cow/BlobStorage.ts: Defensive check rejects NULL hash reads
- src/storage/baseStorage.ts: Use NULL_HASH constant (not hardcoded)
- src/brainy.ts: Use NULL_HASH constant (not hardcoded)

Testing:
- tests/integration/initial-commit-null-parent.test.ts: 5 regression tests
- All 17 tests pass (5 new + 12 existing COW tests)
- Zero regressions

This fix addresses the root cause of 4 consecutive bugs (v5.3.0-v5.3.3):
missing defensive programming for sentinel values in COW storage.

Fixes: Workshop team bug report (v5.3.3 regression)
Tests: 17/17 pass (5 new regression + 12 existing COW)
Build: SUCCESSFUL (zero errors)
2025-11-04 15:39:58 -08:00
..
api feat: add ImageHandler with EXIF extraction and comprehensive MIME detection (v5.2.0) 2025-11-03 14:06:17 -08:00
augmentations feat: add entity versioning system with critical bug fixes (v5.3.0) 2025-11-04 11:19:02 -08:00
cli feat: v5.1.0 - VFS auto-initialization and complete API documentation 2025-11-02 10:58:52 -08:00
config fix: enable GCS native storage with Application Default Credentials 2025-10-09 10:39:54 -07:00
cortex feat: add node: protocol to all Node.js built-in imports for bundler compatibility 2025-09-17 14:20:21 -07:00
critical feat: add browser environment compatibility support 2025-09-17 15:48:02 -07:00
data feat: Phase 3 - Unified Semantic Type Inference (Nouns + Verbs) 2025-10-16 10:59:26 -07:00
distributed feat(v4.0.0): Complete metadata/vector separation architecture with Azure support 2025-10-17 12:29:27 -07:00
embeddings feat(v4.0.0): Complete metadata/vector separation architecture with Azure support 2025-10-17 12:29:27 -07:00
errors feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
graph fix(storage): v4.8.0 metadata architecture refactoring - FIXES VFS bug 2025-10-27 15:43:49 -07:00
hnsw feat: implement complete v5.0.0 Git-style fork/merge/commit workflow 2025-11-01 11:56:11 -07:00
import feat: add ImageHandler with EXIF extraction and comprehensive MIME detection (v5.2.0) 2025-11-03 14:06:17 -08:00
importers feat: v5.1.0 - VFS auto-initialization and complete API documentation 2025-11-02 10:58:52 -08:00
interfaces feat: implement always-adaptive caching with getCacheStats monitoring 2025-10-10 14:09:30 -07:00
mcp refactor: streamline core API surface 2025-10-04 08:52:06 -07:00
neural fix: resolve 13 neural test failures (C++ regex, location patterns, test assertions) 2025-10-30 15:46:22 -07:00
patterns 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
query feat: Phase 3 - Unified Semantic Type Inference (Nouns + Verbs) 2025-10-16 10:59:26 -07:00
scripts feat: add node: protocol to all Node.js built-in imports for bundler compatibility 2025-09-17 14:20:21 -07:00
shared refactor: remove deprecated BrainyData class completely 2025-09-30 16:04:00 -07:00
storage fix: add NULL hash guards to prevent v5.3.3 regression 2025-11-04 15:39:58 -08:00
streaming feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
triple feat: Phase 3 - Unified Semantic Type Inference (Nouns + Verbs) 2025-10-16 10:59:26 -07:00
types fix: resolve critical v5.0.0 metadata race condition 2025-11-02 07:45:29 -08:00
universal fix: prevent fs adapter from throwing on import in browser 2025-09-17 16:22:02 -07:00
utils fix: prevent circuit breaker activation and data loss during bulk imports 2025-10-30 08:54:04 -07:00
versioning fix: resolve critical COW ref resolution and versioning bugs 2025-11-04 13:05:59 -08:00
vfs feat: add entity versioning system with critical bug fixes (v5.3.0) 2025-11-04 11:19:02 -08:00
augmentationManager.ts feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
augmentationPipeline.ts feat: Brainy 3.0 - Production-ready Triple Intelligence database 2025-09-11 16:23:32 -07:00
brainy.ts fix: add NULL hash guards to prevent v5.3.3 regression 2025-11-04 15:39:58 -08:00
coreTypes.ts perf: 48-64× faster HNSW bulk imports via concurrent neighbor updates 2025-10-29 16:10:40 -07:00
cortex.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
index.ts feat: add COW infrastructure exports and augmentation helpers for v5.0.0 2025-11-01 11:55:47 -07:00
pipeline.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00
setup.ts chore: enforce consistent coding style and semicolon removal 2025-09-29 09:50:59 -07:00
unified.ts chore: enforce consistent coding style and semicolon removal 2025-09-29 09:50:59 -07:00
worker.ts 🧠 Brainy 2.0.0 - Zero-Configuration AI Database with Triple Intelligence™ 2025-08-26 12:32:21 -07:00