v0.94.0

Fixed

• Cache Key Collision: dict vs ChainMap (SEC-CACHE-COLLISION-001):

  • Previous: dict and ChainMap with identical content produced identical cache keys
  • Issue: str(dict) differs from str(ChainMap) but cache returned wrong formatted output
  • Fix: Added "__dict__" type-tag for dict and "__mapping__" type-tag for Mapping ABC
  • Location: runtime/cache.py IntegrityCache._make_hashable()
  • Impact: Distinct Mapping types now produce distinct cache keys

• Cache Key TypeError for frozenset (TYPE-CACHE-FROZENSET-001):

  • Previous: frozenset arguments caused TypeError: Unknown type in cache key
  • Issue: frozenset is not a Sequence or Mapping; fell through to error handler
  • Fix: Added explicit case frozenset(): returning ("__frozenset__", ...)
  • Location: runtime/cache.py IntegrityCache._make_hashable()
  • Impact: frozenset arguments now properly cached

• Hash Composition Type Markers (SEC-HASH-AMBIGUITY-CACHE-001):

  • Previous: Raw content_hash bytes concatenated without type marker
  • Issue: Theoretical collision between hash bytes and length-prefixed strings
  • Fix: Added b"\x01" marker before hash bytes, b"\x00" before encoded strings
  • Location: runtime/cache.py IntegrityCacheEntry._compute_checksum(), _compute_content_hash()
  • Impact: Unambiguous structural hashing for financial-grade integrity

• FrozenFluentError Section Markers (SEC-HASH-AMBIGUITY-ERROR-001):

  • Previous: Optional diagnostic/context sections had no presence markers
  • Issue: Theoretical collision between different section configurations
  • Fix: Added section markers b"\x01DIAG"/b"\x00NODIAG" and b"\x01CTX"/b"\x00NOCTX"
  • Location: diagnostics/errors.py FrozenFluentError._compute_content_hash()
  • Impact: Unambiguous structural hashing regardless of optional field presence

• Validation Reports All Deep Chains (VAL-REDUNDANT-REPORTS-001):

  • Previous: _detect_long_chains only reported the single longest chain
  • Issue: Users had to fix and re-run to discover additional deep chains
  • Fix: Now returns warnings for ALL chains exceeding max_depth, sorted by depth
  • Location: validation/resource.py _detect_long_chains()
  • Impact: Better UX for complex FTL files with multiple deep reference chains