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ruvnet / ddd-validate

Validate domain boundaries -- detect cross-context import violations and aggregate invariant issues. Use when auditing a DDD codebase for leaks between bounded contexts, before merging cross-cutting changes, or as a CI gate to catch boundary erosion early.

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SKILL.md
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Validate domain boundary integrity across all bounded contexts.

Steps

  1. Discover contexts: Scan src/*/domain/ to find all bounded contexts.
  2. Check cross-boundary violations:

    • For each context, scan all .ts files for import statements
    • Flag any import that reaches into another context's domain/ directory directly
    • Allowed: importing from another context's public index.ts (application layer)
    • Violation: importing from src/<other-context>/domain/entities/... directly
     # Find cross-boundary imports
     for ctx in $(find src -maxdepth 2 -name "domain" -type d | sed 's|src/||;s|/domain||'); do
       grep -rn "from ['\"].*src/" "src/$ctx/" --include="*.ts" | grep -v "src/$ctx/" || true
     done
  3. Check aggregate invariant enforcement:

    • Scan aggregate root entities for public setters that bypass validation
    • Flag mutable public properties without invariant checks
    • Verify that child entities are not directly accessible (must go through aggregate root)
  4. Check event naming conventions:

    • Domain events should be past-tense named (e.g., OrderCreated, not CreateOrder)
    • Events should be immutable (no public setters)
    • Events should carry the aggregate ID
  5. Check repository patterns:

    • Repository interfaces should exist in domain/repositories/, not infrastructure/
    • Repository implementations should exist in infrastructure/, not domain/
    • Each aggregate root should have exactly one repository
  6. Report findings:

    • Output a table of violations with file path, line number, violation type, and suggestion
    • Categorize as: BOUNDARY, INVARIANT, EVENT, REPOSITORY
    • Exit with summary: total violations, by category, severity
  7. Store results:
    `bash
    npx @claude-flow/cli@latest memory store --key "ddd-validation-TIMESTAMP" --value "RESULTS_SUMMARY" --namespace tasks
    npx @claude-flow/cli@latest hooks post-task --task-id "ddd-validate" --success true --store-results true
    `