Distribution & Delivery

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.