# Deprecated as source of truth

Engineering rules moved to the **AI Engineering System**:

→ **[../../../.ai/](../../../.ai/)**

| Old file | New location |
|---|---|
| 01-git | CONTRIBUTING.md + Trunk-Based note |
| 02-go | `.ai/coding.md` + `.ai/tech-stack.md` |
| 03-api | `.ai/api.md` |
| 04-database | `.ai/database.md` |
| 05-h5-vue | `.ai/ui.md` + `.ai/coding.md` |
| 06-mini-program | `.ai/ui.md` + `.ai/architecture.md` |
| 07-typescript | `.ai/coding.md` + `.ai/tech-stack.md` |
| 08-testing | `.ai/testing.md` |
| 09-cicd | `.ai/deployment.md` |
| 10-ai-collab | `AGENTS.md` + `.ai/prompts/*` |
| 11-security | `.ai/security.md` |
| 12-docs | `.ai/definition-of-done.md` + `apps/docs` for PRD |

Keep PRD / business docs: `apps/docs/prd-mvp.md`, `apps/docs/business-model.md`.