Use for the infrastructure implementation phase after the backend follows the model — turning documents/infra-design decisions into infra/ (local container stack, production IaC), wiring cradle.json infra.up / infra.containers, adding IaC validate and image build steps to CI, and, once E2E passes, applying production once in a sandbox and recording it in the deployment table. Not for designing infrastructure (infra-design).
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Review the instructions the agent will receive before you install.
設計（documents/infra-design/）を infra/ に写す。出番は 2 回: local スタックは E2E の前提、本番の apply は E2E 合格の後。
順序の確認から始める: cradle status でバックエンドが着手済か。着手済でなければ着手しない。
設計を読む: documents/infra-design/ の 02_local / 03_production / 04_operations。INFRA-D をそのまま実装に写す。設計に無いものを足さない（足したくなったら infra-design スキルに戻す）。
local: コンテナ（DB・backend・frontend・モック発行者）を infra/local/ に置く。cradle.json の infra.up に立てる 1 コマンド、infra.containers にコンテナ名を書く。立てて cradle doctor --local が fresh になったら、README の投入表の local を 済（日付） にする。
CI: 骨格の cradle.yml に段を足す。infra/ があるときだけ動く形にする。
infra:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: hashicorp/setup-terraform@v3
if: hashFiles('infra/prod/**') != ''
- run: terraform -chdir=infra/prod fmt -check && terraform -chdir=infra/prod init -backend=false && terraform -chdir=infra/prod validate
if: hashFiles('infra/prod/**') != ''
# plan は state と資格情報が要る。持てる環境でだけ足す
- run: docker build -t <registry>/<app>-backend:${{ github.sha }} backend
if: hashFiles('infra/**') != ''
IaC が Terraform でなければ、その道具の fmt / validate に読み替える。イメージのタグはコミット SHA。
prod: E2E 合格後、サンドボックスで一度 apply する。cradle status のインフラ設計に prod に関わる未決 INFRA-Q が残っていれば apply しない。投入表の prod を 済（日付） にし、記録に詰まった箇所を 1 行。
設計への戻し: 実装で前提が変わったら README の「実装後の見直し」に事実だけを書き、設計を直す。
cradle doctor --local（local の鮮度）だけ。残りは設計と突き合わせて読む。No reviews yet. Tell others what you thought.
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Use when adding or changing REST endpoints or the OpenAPI contract — deriving endpoints from the Lean commands and views, writing documents/codebase/openapi.yaml first, then regenerating the backend controller interfaces and the frontend client.
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Use after a backend build succeeds or whenever authentication, authorization, actor/identity handling, external service calls (IdP, JWKS, DB, clock), logging, observability, configuration or error contracts are in play — delegates to the backend-design-reviewer agent for a design-quality review of the current branch.
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Use when it is time to make the backend follow the Lean model — regenerate Kotlin from Lean, implement the generated interfaces (UseCase, QueryService, Repository, Entity), wire every generated contract test, make the build green, then run the design and SQL reviews. Backend comes after the human confirmed the screens.
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Use when you need the current position in the Lean spec-driven pipeline, or any deterministic check of a Cradle project — status, golden regression, Lean layer walls, regeneration impact, unslop lint, ddd cleanup. Runs the scripts under scripts/ and reports their output verbatim.
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Use to start a new product on Cradle or to add the Cradle skeleton to an existing repository — writes cradle.json, the project-facts instruction (.apm/instructions/project.instructions.md), documents/{ddd,ai-notes,infra-design,codebase} templates, CI, and a compiling Lean executable-spec scaffold with a minimal example domain, mockup and CLI.
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Use when the product owner asks where the project stands, what to do next, or which phase of the Lean spec-driven pipeline is current — runs cradle status and proposes exactly one next step.
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