Agent skill
faion-software-developer
Developer role: Python, JavaScript/TypeScript, backend, APIs, testing, automation, UI design. Full-stack development with 68 methodologies.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/faion-software-developer-faionfaion-faion-network
SKILL.md
Developer Domain Skill
Communication: User's language. Code: English.
Purpose
Orchestrates all software development activities. Covers programming languages, frameworks, testing, API design, and automation.
Agents
| Agent | Purpose |
|---|---|
| faion-code-agent | Code generation and review |
| faion-test-agent | Test generation and execution |
| faion-frontend-brainstormer-agent | Generate 3-5 design variants |
| faion-storybook-agent | Setup/maintain Storybook |
| faion-frontend-component-agent | Develop components with stories |
References
Detailed technical context for each area:
| Reference | Content | Lines |
|---|---|---|
| python.md | Python, Django, FastAPI, pytest, typing | ~1760 |
| javascript.md | TypeScript, React, Node.js, Bun, testing | ~1350 |
| backend.md | Backend architecture, databases, caching | ~3180 |
| api-design.md | REST, GraphQL, OpenAPI, versioning | ~2250 |
| testing.md | Unit, integration, E2E, TDD, coverage | ~1810 |
| browser-automation.md | Puppeteer, Playwright, scraping | ~1490 |
| methodologies.md | 68 development methodologies (M-DEV-*) | ~1573 |
| documentation.md | CLAUDE.md creation templates | ~180 |
| frontend-design.md | UI brainstorming, Storybook workflow | ~90 |
| django/ | Django-specific patterns (7 files) | ~600 |
Total: ~14,280 lines of technical reference
Quick Reference
Language Selection
| Language | When to Use |
|---|---|
| Python | Backend APIs, data processing, ML, scripting |
| TypeScript | Frontend, Node.js backend, full-stack |
| Go | High-performance services, CLI tools |
| Rust | Systems programming, WASM |
Framework Selection
| Framework | Use Case |
|---|---|
| Django | Full-featured web apps, admin panels |
| FastAPI | Modern async APIs, microservices |
| React | Complex UIs, SPAs |
| Next.js | Full-stack React, SSR/SSG |
| Express | Simple Node.js APIs |
| Bun | Fast TypeScript runtime |
Testing Strategy
| Level | Coverage | Tools |
|---|---|---|
| Unit | 70% | pytest, Vitest, Jest |
| Integration | 20% | pytest-django, Supertest |
| E2E | 10% | Playwright, Cypress |
Methodologies (32)
Python (M-PY-*)
| ID | Name | Purpose |
|---|---|---|
| M-PY-001 | Project Setup Poetry | Dependency management |
| M-PY-002 | Django Patterns | Models, views, services |
| M-PY-003 | FastAPI Patterns | Routes, dependencies, Pydantic |
| M-PY-004 | pytest Patterns | Fixtures, mocking, parametrize |
| M-PY-005 | Type Hints | Type safety, mypy |
| M-PY-006 | Code Formatting | Black, isort, flake8 |
| M-PY-007 | Virtual Environments | venv, Poetry, pyenv |
| M-PY-008 | Async Python | asyncio, concurrent execution |
JavaScript/TypeScript (M-JS-*)
| ID | Name | Purpose |
|---|---|---|
| M-JS-001 | Component Architecture | React feature-based structure |
| M-JS-002 | TypeScript Strict Mode | Type safety patterns |
| M-JS-003 | React Hooks | Custom hooks best practices |
| M-JS-004 | Node.js Service Layer | Controller-Service-Repository |
| M-JS-005 | Error Handling | Custom errors, middleware |
| M-JS-006 | Testing Pyramid | Unit, integration, E2E balance |
| M-JS-007 | Package Management | pnpm, lockfiles, security |
| M-JS-008 | Performance | Memoization, virtualization |
Backend (M-BE-*)
| ID | Name | Purpose |
|---|---|---|
| M-BE-001 | Clean Architecture | Layers, dependencies |
| M-BE-002 | Database Design | Normalization, indexes |
| M-BE-003 | Caching Strategy | Redis, in-memory, CDN |
| M-BE-004 | Authentication | JWT, sessions, OAuth |
| M-BE-005 | Rate Limiting | Token bucket, sliding window |
| M-BE-006 | Background Jobs | Celery, BullMQ, cron |
| M-BE-007 | Logging & Monitoring | Structured logs, metrics |
| M-BE-008 | Error Recovery | Retry, circuit breaker |
API Design (M-API-*)
| ID | Name | Purpose |
|---|---|---|
| M-API-001 | REST Conventions | Resources, verbs, status codes |
| M-API-002 | OpenAPI/Swagger | Documentation, code generation |
| M-API-003 | Versioning | URL, header, query strategies |
| M-API-004 | Pagination | Cursor, offset, keyset |
| M-API-005 | Error Responses | Consistent error format |
| M-API-006 | GraphQL Patterns | Schema, resolvers, N+1 |
| M-API-007 | WebSocket Design | Real-time communication |
| M-API-008 | API Security | CORS, rate limits, validation |
Workflows
New Feature Development
1. Understand requirements
2. Design API/data model
3. Write failing tests (TDD)
4. Implement code
5. Pass tests
6. Code review
7. Deploy
Code Review Checklist
- Follows project conventions
- Has appropriate tests
- No security vulnerabilities
- Error handling complete
- Performance considered
- Documentation updated
Debugging Process
1. Reproduce the issue
2. Check logs and stack trace
3. Isolate the problem
4. Write failing test
5. Fix the issue
6. Verify fix
7. Add regression test
Code Quality Tools
Python
# Format
black src/ && isort src/
# Lint
flake8 src/ && mypy src/
# Test
pytest --cov=src
JavaScript/TypeScript
# Format
prettier --write .
# Lint
eslint . --fix
# Test
vitest run --coverage
Pre-commit
# .pre-commit-config.yaml
repos:
- repo: https://github.com/psf/black
rev: 24.1.0
hooks: [{ id: black }]
- repo: https://github.com/pycqa/isort
rev: 5.13.0
hooks: [{ id: isort }]
- repo: https://github.com/pre-commit/mirrors-mypy
rev: v1.8.0
hooks: [{ id: mypy }]
Project Templates
Python Backend
project/
├── src/
│ ├── __init__.py
│ ├── main.py
│ ├── config.py
│ ├── models/
│ ├── services/
│ ├── api/
│ └── utils/
├── tests/
├── pyproject.toml
└── Dockerfile
TypeScript Full-Stack
project/
├── apps/
│ ├── web/ # Next.js frontend
│ └── api/ # Express/Fastify backend
├── packages/
│ ├── ui/ # Shared components
│ ├── config/ # Shared configs
│ └── types/ # Shared types
├── pnpm-workspace.yaml
└── turbo.json
Related Skills
| Skill | Relationship |
|---|---|
| faion-devops | Deployment, CI/CD |
| faion-ml | AI/ML integrations |
| faion-sdd | Specification-driven development |
Error Handling
| Issue | Action |
|---|---|
| Unknown language | Ask user or infer from files |
| Missing context | Read references/ for patterns |
| Complex architecture | Use Task tool with Explore agent |
Developer Domain Skill v3.0 10 Reference Areas | 68 Methodologies | 5 Agents Consolidated from: faion-development, faion-dev-django, faion-dev-docs, faion-dev-frontend
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