Support an offline bootstrap from a verified local cache
Developers lose network access during an incident rehearsal and bootstrap cannot tell which packages and service images are already available locally.
- Focused work estimate
- 6h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Offline workflows · Artifact integrity · Dependency management
Estimated field mix
- DevOps60%
- Developer tooling40%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
A fictional support portal requires a database, cache, object store, and mail catcher. Setup lives in personal notes, reset scripts sometimes target shared resources, and offline work fails after package caches are cleared. Build a local-only development contract with synthetic data; no shared staging system or production credentials are supplied.
Setup prerequisites
- Environment variables
- Service health
- Database migrations
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Offline manifest lists exact package and image digests
- Bootstrap verifies every cached artifact before use
- Missing items produce a complete acquisition list without partial startup
Implementation constraints
- Do not bypass integrity checks or contact a network when offline mode is selected.
Verification to include
- Bootstrap from a complete verified cache with network access denied.
- Remove and corrupt separate artifacts and report both before starting services.
Deliverables
- Offline manifest, verifier, and disconnected tests
Rollout and recovery
Treat offline support as explicit mode with a generated cache preparation step.
Value of the work
For the engineer: Practice developer-environment automation, safe reset boundaries, portability, and diagnostic quality.
For the team: Reduce onboarding and support cost while making local dependencies and destructive operations explicit.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.