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ddd-validate

Audit a TypeScript codebase organized with domain-driven design, which separates business responsibilities into distinct areas. Identify improper imports, unchecked data changes, event issues, and repository placement problems, then report their locations and suggested fixes.

OriginalShow the original description

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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Good for

  • Auditing dependencies between business domains
  • Reviewing cross-module changes before merging
  • Checking domain boundaries in continuous integration
  • Finding unchecked changes to aggregate data

Files included (1)

  • SKILL.md2.5 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

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:

    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
    

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