project-standart-arch

<when_to_use> After PRD and use cases, before epics and decomposition When integrations, migrations, public contracts, or non-functional risks exist </when_to_use>

<required_preload> shared-base-rules shared-docs-paths planning-impact-analysis planning-risk-assessment planning-migration-strategy </required_preload>

<document_target> Create/update arch.md </document_target>

<output_format>

<quality_rules> The architecture covers all critical PRD/use-case requirements External contracts are listed explicitly Each decision includes rationale and consequences </quality_rules>