Compliance by Construction

A capability matrix built for defensibility

This is the difference between CRUD software and an immutable clinical operating system. Every capability below is a differentiator VetOS was designed to enforce.

Request a Technical Walkthrough Security Posture

Core Architecture

Built on append-only truth. No silent overwrites.

  • Event-sourced immutable ledger (append-only truth)
  • Deterministic rebuild of all data from events
  • Offline-first by design (not an afterthought)
  • Client-generated IDs (merge-safe offline sync)
  • Dual-time model (occurredAt vs server time)
  • Canon-enforced invariants (fail-closed)

Data Integrity & Auditability

Legally defensible records with full provenance.

  • Tamper-evident medical records
  • Amendment / correction events (no silent edits)
  • Full provenance (who / where / device / version)
  • Replay-safe projections (no side effects on rebuild)
  • Forensic audit exports (ledger-derived)
  • Legal hold support
  • Clock-drift detection (malicious or broken clients)

Offline & Sync (Where Legacy Fails)

Full clinical workflows offline with deterministic recovery.

  • Full clinical workflows offline
  • Conflict-aware sync (not last-write-wins)
  • Idempotent ingestion at every layer
  • Schema-version compatibility for offline clients
  • Durable outbox pattern
  • Crash-safe mid-sync recovery
  • Deterministic replay after reconnect

Multi-Clinic & Tenancy

Hard isolation enforced everywhere.

  • Hard tenant isolation (enforced everywhere)
  • Clinic-scoped events + projections
  • Cross-clinic transfer with clean identity boundaries
  • No shared global tables
  • Cache keys include tenant + clinic

Clinical Safety & Compliance

Safety and compliance are first-class citizens.

  • Immutable medical record history
  • Explicit consent & communication events
  • Controlled substance chain-of-custody
  • Non-destructive billing voids & adjustments
  • Appointment invariants (no silent double-book)
  • Replay-safe billing & payments

Engineering Reality

Designed to survive real-world failure.

  • Dual-write protection (outbox enforced)
  • Explicit idempotency primitives (named + enforced)
  • Race-condition-safe billing & inventory
  • Saga-based side-effect orchestration
  • Zero best-effort writes
  • Deterministic error recovery

Extensibility & Longevity

Future-proof by construction.

  • Safe schema evolution (upcasters)
  • Backward-compatible event handling
  • No data migrations required for new features
  • Projection-specific read optimization
  • Infrastructure-agnostic core logic

Want the full teardown?

We’ll walk through the capability matrix, show how the ledger model changes everything, and explain what migration looks like from legacy systems.

Contact Sales