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Layer 20 of 20

Governance & Evolution

Long-term integrity: standards, decision logs, change control, architecture reviews, and evolutionary design constraints.

Responsibilities

  • Maintain architecture integrity through standards and decision logs.
  • Define change control and review mechanisms.
  • Enable long-term evolution without breaking invariants.

Key interfaces

  • Decision log (ADRs) and review checklists.
  • Change management process (deprecation, compatibility, migrations).
  • Ownership model and escalation paths.

Operational signals

These are the measurements that tell you whether this layer is healthy in production.

  • Architecture review throughput and time-to-decision.
  • Repeated incident classes indicating systemic gaps.
  • Dependency and coupling trends over time.

Failure modes

  • Unowned decisions leading to drift and inconsistency.
  • Breaking changes without migration plans.
  • Security and privacy regressions during rapid iteration.

Production readiness checklist

  • Require architecture notes for high-impact changes.
  • Maintain compatibility windows and migration guides.
  • Continuously evaluate and retire obsolete patterns safely.
Governance & Evolution — HOWFAR Architecture — HOWFAR