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Layer 19 of 20

Distribution & Delivery

Release and delivery channels: CDN distribution, app store pipelines, CI/CD, rollout strategies, and runtime updates.

Responsibilities

  • Provide CI/CD, rollout strategies, and artifact provenance.
  • Deliver updates via CDN/app stores with safe rollback paths.
  • Keep environment promotion and releases auditable.

Key interfaces

  • Build pipeline contracts (immutable artifacts, checksums, signatures).
  • Release orchestration (canary, blue/green, phased rollout).
  • Incident rollback and hotfix procedures.

Operational signals

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

  • Deploy frequency, change failure rate, MTTR (DORA metrics).
  • Rollout health signals and rollback triggers.
  • CDN error rate and cache invalidation success.

Failure modes

  • Broken releases without rollback guardrails.
  • Artifact drift between environments.
  • Cache invalidation errors causing stale behavior.

Production readiness checklist

  • Ship with canaries and automatic rollback thresholds.
  • Keep releases traceable (who/what/when) with immutable artifacts.
  • Test rollback paths and rehearse incident response.
Distribution & Delivery — HOWFAR Architecture — HOWFAR