changelog

Platform Evolution Ledger

A verifiable record of how Déjà's deterministic engine, historical backfill, and security posture evolve over time — written for teams who need proof about vault‑level recall, 90‑day vs 2‑year horizons, and compliance impact.

LEDGER_STATUS: VERIFIED_AND_IMMUTABLE

v1.2.0— Historical Forensic Backfill & Ingestion Lanessha256: e3b0c442…

Dec 22, 2025

Infrastructure deployment: Dual‑Lane Ingestion Architecture enabling deterministic historical analysis and audit‑trail reconstruction for their teams.

[TAG: INFRA_DEPLOYMENT][TAG: FORENSIC_BACKFILL][TAG: SECURITY_HARDENING][TAG: PLAN_HORIZONS]

NEW

Historical Backfill Lane: deterministic scan of last 730 days of Git history with SHA‑256 fingerprinting for immediate ledger population on Enterprise teams.

NEW

Retroactive Audit Indexing: reconstruct resolved incidents via graph traversal of historical resolution artifacts.

IMPROVEMENT

Vault‑Scoped Recall Horizons: plans now declare recall depth explicitly: Observer uses a 90‑day rolling window; Pro and Enterprise support up to two years of time‑travel backfill by default.

IMPROVEMENT

Normalization Engine: upgraded path sanitizer for monorepo prefixes (webpack:///) to improve canonical collisions.

v1.1.8— Ingestion Integrity Controlssha256: 9f86d081…

Dec 10, 2025

Strict symbolication enforcement on the Real‑Time Lane. Payloads with minified frames lacking source map correlation are rejected at the edge to prevent schema pollution.

[TAG: SECURITY_HARDENING][TAG: INGEST_PIPELINE]

v1.1.5— Dependency Hardeningsha256: 2c26b46b…

Dec 5, 2025

Upgraded downstream cryptographic libraries to mitigate CVE‑2024‑XXXX. Enforced stricter TLS requirements on webhook ingress for enhanced audit‑trail integrity.

[TAG: SECURITY_HARDENING][TAG: TLS_POLICY]

v1.1.4— The "Revert" Penaltysha256: 4a44dc15…

Dec 1, 2025

Refined deterministic scoring algorithms in the Validation Orchestrator to improve regression detection accuracy and audit‑trail completeness.

NEW

Revert Detection: if a validated PR is reverted within 24h, the solution signature is invalidated to maintain trust.

IMPROVEMENT

Rate Gate Calibration: adjusted entropy sensitivity to reduce false positives during low‑traffic windows without weakening determinism.

v1.1.0— Cross‑Service Alertingsha256: ef2d127d…

Nov 28, 2025

Knowledge Graph now supports deterministic cross‑service alert broadcasting with delivery guarantees.

[TAG: INTEGRATION][TAG: GRAPH_TRAVERSAL]

v1.0.0— General Availabilitysha256: 6b86b273…

Oct 15, 2025

Platform launch: deterministic incident resolution with forensic verification and audit‑certificate endpoints.

[TAG: GA][TAG: AUDITABILITY][TAG: TRUST_PRIMITIVE]