centralize guides and rails under mosaic with runtime compatibility links

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Jason Woltje
2026-02-17 11:39:52 -06:00
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# ${PROJECT_NAME} — Agent Context
> Guidelines for AI agents working on this NestJS + Next.js monorepo.
> **Update this file** when you discover reusable patterns or non-obvious requirements.
## Codebase Patterns
- **Monorepo structure:** pnpm workspaces + TurboRepo
- `apps/api/` — NestJS backend
- `apps/web/` — Next.js frontend
- `packages/shared/` — Shared types and utilities
- **Database:** Prisma ORM — schema at `apps/api/prisma/schema.prisma`
- **Auth:** Configured in `apps/api/src/auth/`
- **API:** RESTful with DTOs for validation
## Common Gotchas
- **Always run `pnpm install`** after pulling — lockfile changes frequently
- **Prisma generate** after schema changes: `pnpm --filter api prisma generate`
- **Environment variables:** Frontend vars need `NEXT_PUBLIC_` prefix
- **Import paths:** Use `@shared/` alias for shared package imports
- **Tests require running database:** Set `DATABASE_URL` in `.env.test`
- **TurboRepo caching:** Run `pnpm clean` if builds behave unexpectedly
## Context Management
Context = tokens = cost. Be smart.
| Strategy | When |
|----------|------|
| **Spawn sub-agents** | Isolated coding tasks, research |
| **Batch operations** | Group related API calls |
| **Check existing patterns** | Before writing new code |
| **Minimize re-reading** | Don't re-read files you just wrote |
## Quality Gates
**All must pass before any commit:**
```bash
pnpm typecheck && pnpm lint && pnpm test
```
## Orchestrator Integration
### Task Prefix
Use `${TASK_PREFIX}` for orchestrated tasks (e.g., `${TASK_PREFIX}-SEC-001`).
### Worker Checklist
1. Read the finding details from the report
2. Implement the fix following existing patterns
3. Run quality gates (ALL must pass)
4. Commit: `git commit -m "fix({finding_id}): brief description"`
5. Push: `git push origin {branch}`
6. Report result as JSON
### Post-Coding Review
After implementing changes, the orchestrator will run:
1. **Codex code review** — `~/.mosaic/rails/codex/codex-code-review.sh --uncommitted`
2. **Codex security review** — `~/.mosaic/rails/codex/codex-security-review.sh --uncommitted`
3. If blockers/critical findings: remediation task created
4. If clean: task marked done
## Workflow (Non-Negotiable)
```
1. Branch → git checkout -b feature/XX-description
2. Code → TDD: write test (RED), implement (GREEN), refactor
3. Test → pnpm test (must pass)
4. Push → git push origin feature/XX-description
5. PR → Create PR to develop (not main)
6. Review → Wait for approval or self-merge if authorized
7. Close → Close related issues
```
**Never merge directly to develop without a PR.**
## Key Files
| File | Purpose |
|------|---------|
| `CLAUDE.md` | Project overview and conventions |
| `apps/api/prisma/schema.prisma` | Database schema |
| `apps/api/src/` | Backend source |
| `apps/web/app/` | Frontend pages |
| `packages/shared/` | Shared types |
| `.env.example` | Required environment variables |
---
_Model-agnostic. Works for Claude, Codex, GPT, Llama, etc._

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# ${PROJECT_NAME} — Claude Code Instructions
> **${PROJECT_DESCRIPTION}**
## Conditional Documentation Loading
| When working on... | Load this guide |
|---|---|
| Bootstrapping this project | `~/.mosaic/guides/bootstrap.md` |
| Orchestrating autonomous tasks | `~/.mosaic/guides/orchestrator.md` |
| Frontend development | `~/.mosaic/guides/frontend.md` |
| Backend/API development | `~/.mosaic/guides/backend.md` |
| Code review | `~/.mosaic/guides/code-review.md` |
| TypeScript strict typing | `~/.mosaic/guides/typescript.md` |
| Authentication/Authorization | `~/.mosaic/guides/authentication.md` |
| QA/Testing | `~/.mosaic/guides/qa-testing.md` |
## Technology Stack
| Layer | Technology |
|-------|------------|
| **Frontend** | Next.js + React + TailwindCSS + Shadcn/ui |
| **Backend** | NestJS + Prisma ORM |
| **Database** | PostgreSQL |
| **Testing** | Vitest + Playwright |
| **Monorepo** | pnpm workspaces + TurboRepo |
| **Deployment** | Docker + docker-compose |
## Repository Structure
```
${PROJECT_DIR}/
├── CLAUDE.md # This file
├── AGENTS.md # Agent-specific patterns and gotchas
├── apps/
│ ├── api/ # NestJS backend
│ │ ├── src/
│ │ ├── prisma/
│ │ │ └── schema.prisma
│ │ └── Dockerfile
│ └── web/ # Next.js frontend
│ ├── app/
│ ├── components/
│ └── Dockerfile
├── packages/
│ ├── shared/ # Shared types, utilities
│ ├── ui/ # Shared UI components
│ └── config/ # Shared configuration
├── docs/
│ ├── scratchpads/ # Per-issue working documents
│ └── templates/ # Project templates
├── tests/ # Integration/E2E tests
├── docker/ # Docker configuration
├── .env.example
├── turbo.json
├── pnpm-workspace.yaml
└── README.md
```
## Development Workflow
### Branch Strategy
- `main` — Stable releases only
- `develop` — Active development (default working branch)
- `feature/*` — Feature branches from develop
- `fix/*` — Bug fix branches
### Starting Work
```bash
git checkout develop
git pull --rebase
pnpm install
```
### Building
```bash
pnpm build # Build all packages
pnpm --filter api build # Build API only
pnpm --filter web build # Build web only
```
### Testing
```bash
pnpm test # Run all tests
pnpm test:unit # Unit tests (Vitest)
pnpm test:e2e # E2E tests (Playwright)
pnpm test:coverage # Coverage report
```
### Linting & Type Checking
```bash
pnpm lint # ESLint
pnpm typecheck # TypeScript type checking
pnpm format # Prettier formatting
```
## Quality Gates
**All must pass before committing:**
```bash
pnpm typecheck && pnpm lint && pnpm test
```
## API Conventions
### NestJS Patterns
- Controllers handle HTTP, Services handle business logic
- Use DTOs with `class-validator` for request validation
- Use Guards for authentication/authorization
- Use Interceptors for response transformation
- Use Prisma for database access (no raw SQL)
### REST API Standards
- `GET /resource` — List (with pagination)
- `GET /resource/:id` — Get single
- `POST /resource` — Create
- `PATCH /resource/:id` — Update
- `DELETE /resource/:id` — Delete
- Return proper HTTP status codes (201 Created, 204 No Content, etc.)
## Frontend Conventions
### Next.js Patterns
- Use App Router (`app/` directory)
- Server Components by default, `'use client'` only when needed
- Use Shadcn/ui components — don't create custom UI primitives
- Use TailwindCSS for styling — no CSS modules or styled-components
### Component Structure
```
components/
├── ui/ # Shadcn/ui components (auto-generated)
├── layout/ # Layout components (header, sidebar, etc.)
├── forms/ # Form components
└── features/ # Feature-specific components
```
## Database
### Prisma Workflow
```bash
# Generate client after schema changes
pnpm --filter api prisma generate
# Create migration
pnpm --filter api prisma migrate dev --name description
# Apply migrations
pnpm --filter api prisma migrate deploy
# Reset database (dev only)
pnpm --filter api prisma migrate reset
```
### Rules
- Always create migrations for schema changes
- Include migrations in commits
- Never use raw SQL — use Prisma client
- Use transactions for multi-table operations
## Code Review
### Independent Review (Automated)
After completing code changes, run independent reviews:
```bash
# Code quality review (Codex)
~/.mosaic/rails/codex/codex-code-review.sh --uncommitted
# Security review (Codex)
~/.mosaic/rails/codex/codex-security-review.sh --uncommitted
```
## Issue Tracking
### Workflow
1. Check for assigned issues before starting work
2. Create scratchpad: `docs/scratchpads/{issue-number}-{short-name}.md`
3. Reference issues in commits: `Fixes #123` or `Refs #123`
4. Close issues after successful testing
### Commits
```
<type>(#issue): Brief description
Fixes #123
```
Types: `feat`, `fix`, `docs`, `test`, `refactor`, `chore`
## Secrets Management
**NEVER hardcode secrets.**
```bash
# .env.example is committed (with placeholders)
# .env is NOT committed (contains real values)
```
Required environment variables are documented in `.env.example`.