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DDEV-101 · Make the delivery contract visible

Turn the setup notes into one preflight report

Practice briefTaskFoundational

A new developer follows six documents and reaches application startup before learning that the required runtime version is unsupported.

Focused work estimate
1h 30m + prerequisites
Priority in the scenario
Medium
Engineering practice
Developer experience · Environment diagnostics

Estimated field mix

  • DevOps70%
  • Developer tooling30%

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

No earlier ticket is required. Complete the project setup above.

Acceptance criteria

  • Preflight checks runtime, package manager, container engine, ports, and required files
  • Each result says detected, required, and remediation
  • Checks are read-only and return one aggregate status

Implementation constraints

  • Do not install software or change host settings from preflight.

Verification to include

  • Run against a complete declared fixture environment.
  • Simulate multiple missing dependencies and report all of them in one pass.

Deliverables

  • Read-only preflight command and environment fixtures

Rollout and recovery

Link preflight from the existing setup guide before removing manual checks.

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.