TDS GUARANTEED STORAGE — PHASE 9 STATUS
Version: v3.5.3-dev9

COMPLETED

- Content-addressed immutable SHA-256 segments.
- Ordered immutable generation manifests.
- Atomic SEGMENT_CURRENT publication after complete verification.
- Fixed-size incremental segment reuse.
- Explicit physical-write and reuse accounting.
- Streaming reconstruction through the proven materialisation engine.
- Full logical size and SHA-256 verification.
- Manifest canonical-form and identity verification.
- Corrupt, missing, or size-mismatched segment rejection.
- Deterministic newest-valid-generation recovery and pointer repair.
- Proven reference accounting across valid generations.
- Explicit dry-run-first segment garbage collection.
- Cross-process fail-closed mutation exclusion for commit, deletion, and GC.
- Full-image dev8 path retained unchanged and independently addressable.
- No activation or silent behavior change.

PHASE 9 INVARIANT

A segment is authoritative only through a fully valid immutable manifest that is
reachable from a valid generation. A generation becomes current only after every
segment and the complete logical reconstruction verify.

GC INVARIANT

A segment may be deleted only while mutation exclusion is held and only after a
fresh scan proves that no valid generation manifest references it.

NEXT PHASE

Phase 10 — Controlled Activation
