### WWJCloud Migration Tooling Rules

Purpose: Standardize PHP→NestJS migration for AI-friendly, repeatable generation. Tools only; do not hand-edit generated outputs.

— Scope & Principles —
- NestJS compliance: Follow official module/controller/service/entity/DTO patterns; DI-first; guards/pipes/interceptors.
- Core-only: Generators write strictly under `src/core/{module}/...`. Do NOT create/modify `src/common`, `src/vendor`, or `src/config`.
- Business-first: Migrate PHP business logic (services/controllers/models/validators). Replace PHP infra calls with `src/common/*` capabilities.
- Java-structure reference: Organize per module with `controllers/`, `services/`, `entity/`, `dto/`; controllers orchestrate, services hold business, entities map DB only.

— Contracts & Compatibility —
- Database alignment: Table/column/index/types must match PHP 100%. No new/renamed/removed fields.
- Method alignment: Service method names map 1:1 with PHP. Do not invent names.
- Routing: Keep `/adminapi` and `/api` prefixes and controller segmentation consistent with PHP.
- Validation: Map PHP validators to DTO + class-validator/pipes. Behaviorally equivalent.

— Naming & Paths —
- Files: kebab-case filenames
  - Controllers: `*.controller.ts`
  - Services: `*.service.ts`
  - Entities: `*.entity.ts`
- Classes: PascalCase.
- Aliases (tsconfig): `@wwjCommon/*`, `@wwjCore/*`, `@wwjVendor/*`, `@/*`.

— Infrastructure Mapping —
- Replace PHP infra with Common layer:
  - Guards: `@wwjCommon/guards/*` (e.g., `jwt-auth.guard`, `roles.guard`, `optional-auth.guard`)
  - Decorators: `@wwjCommon/decorators/*` (e.g., `roles.decorator`, `public.decorator`)
  - Exceptions: `@wwjCommon/exceptions/business.exception`
  - Pipes: `@wwjCommon/validation/pipes/*` (e.g., `parse-diy-form.pipe`, `json-transform.pipe`)
  - Cache/Queue/DB utilities under `@wwjCommon/*`
  - Do not reference `@wwjCore/*` for infra.

— Module Generation —
- Generate `src/core/{module}/{module}.module.ts` registering discovered controllers/services.
- Entities: detect `*.entity.ts`; optionally include `TypeOrmModule.forFeature([...])` (feature flag). 
- Filter non-business directories by default (whitelist/blacklist). Avoid generating modules for technical directories like `job/`, `queue/`, `workerman/`, `lang/`, etc.

— Generation Stages (feature flags) —
- Commands: disabled by default (we do not use `nest-commander`).
- Jobs/Listeners: configurable; ensure no duplicate suffixes (avoid `JobJob`/`ListenerListener`).
- Routes: no separate route files (NestJS uses decorators).

— Idempotency & Safety —
- Re-runnable: Same inputs → same outputs. Overwrite files in place; create missing directories; never delete parent folders.
- Dry-run mode: Output plan without writing files; provide diff-like summary.
- Logging: Summarize counts for modules/controllers/services/entities/validators, skipped items, and errors.

— Security & Multitenancy —
- Guards: apply standard guards in controllers; enforce role checks and optional auth where applicable.
- Tenant isolation: preserve `site_id` semantics; avoid exposing sensitive fields in responses.

— Quality Gates —
- After generation (tool-side), optionally run TypeScript compile and ESLint checks. Fail fast and report.
- Remove duplicate imports; standardize import order; ensure resolved alias paths.

— Temporary Artifacts —
- All temporary scripts/docs/reports stay in `tools/`. Clean up when done. Never write temp files outside `tools/`.

— Enforcement —
- “Only fix tools, not generated files.” If outputs are wrong, update tools and re-run.

— Versioning & Extensibility —
- Keep infra replacement map versioned and extensible to support future modules and AI evolution.

— Quick Checklist —
- [ ] Files are kebab-case; classes are PascalCase
- [ ] Controllers only orchestrate/validate; services hold business logic
- [ ] Entities map DB 1:1 with PHP schema
- [ ] All infra imports use `@wwjCommon/*`
- [ ] `/adminapi` and `/api` controllers generated correctly
- [ ] Modules register found controllers/services; optional TypeORM feature import
- [ ] Commands disabled; jobs/listeners gated; no duplicate suffixes
- [ ] Safe write, idempotent, dry-run available; logs emitted


