@buivietphi/skill-backend-mt

Master Senior Backend Engineer — AI agent skill with production patterns from 30+ top repos (200k+ GitHub stars). Trained from research of top 53k+ star skill repos + system prompts from 7 major AI tools.

Works with: Claude Code · Cline · Roo Code · Cursor · Windsurf · Copilot · Codex · Gemini · Kimi · Kilo Code · Kiro · Antigravity

Supports: NestJS · Next.js · Express · Fastify · Vue.js · Nuxt · Django · FastAPI · Flask · Spring Boot · Laravel · Go · Ruby on Rails · Rust

Install

# Interactive (checkbox UI — pick your agents)
npx @buivietphi/skill-backend-mt

# Specific agent
npx @buivietphi/skill-backend-mt --claude
npx @buivietphi/skill-backend-mt --codex
npx @buivietphi/skill-backend-mt --gemini
npx @buivietphi/skill-backend-mt --all

# Project-level rules (Cursor, Windsurf, Cline, etc.)
npx @buivietphi/skill-backend-mt --init           # Interactive
npx @buivietphi/skill-backend-mt --init cursor     # Just .cursorrules
npx @buivietphi/skill-backend-mt --init all        # All agents

What Happens

~/.claude/skills/
  └── skill-backend-mt/
      ├── SKILL.md              ← Entry point (auto-loaded)
      ├── AGENTS.md
      ├── nodejs/
      │   ├── nestjs.md
      │   ├── nextjs.md
      │   ├── express.md
      │   └── vuejs.md
      ├── python/
      │   ├── fastapi.md
      │   └── django.md
      ├── java/
      │   └── spring-boot.md
      ├── php/
      │   └── laravel.md
      ├── others/
      │   └── go-ruby-rust.md
      └── shared/               ← On-demand (28 files)

Usage

Default Mode (Pre-Built Patterns)

@skill-backend-mt
> "Create a user CRUD with JWT auth"

Uses production patterns from 30+ repos. Best for learning, new projects, generic advice.

Project Mode (Adapt to Your Codebase)

@skill-backend-mt project
> "Add an orders module"

Reads YOUR project first, clones existing patterns. Best for existing codebases.

What's Included

Architecture Patterns

• Clean Architecture, Hexagonal, DDD, CQRS
• Module-based vs Layer-based structure
• Monolith vs Microservices decision matrix
• Reference repos: NestJS (70k+), Next.js (130k+), FastAPI (80k+), Spring Boot (76k+), Laravel (79k+), Django (82k+)

API Design

• REST conventions (resources, verbs, status codes)
• GraphQL schema design + N+1 prevention
• gRPC proto patterns
• WebSocket real-time patterns
• Pagination (cursor-based vs offset)

Security (OWASP Top 10)

• JWT + refresh token rotation
• OAuth 2.0 / OpenID Connect
• RBAC / ABAC authorization
• SQL injection, XSS, CSRF prevention
• Rate limiting, CORS, secret management

Database & Performance

• ORM patterns (Prisma, TypeORM, SQLAlchemy, Eloquent, Spring Data, Mongoose)
• Migration best practices
• N+1 query detection and fix
• Multi-level caching (Redis, in-memory, CDN)
• Connection pooling, query optimization

Implementation Patterns (NEW in v1.3.0)

• CRUD service generation (validate → authorize → execute → side effects → return DTO)
• Error handling implementation (custom exceptions, global handler, retry + timeout)
• Caching implementation (cache-aside, write-through, invalidation, stampede prevention)
• Pagination & filtering (offset-based, cursor-based, sort security, filter whitelist)
• Testing fixtures (factories, builders, mocks, integration test setup)
• File upload & storage (S3, presigned URL, validation, image processing, cleanup)
• Background jobs (BullMQ, Celery, retries, dead letter queue, CRON)
• Webhook patterns (signature verification, deduplication, idempotent handlers)
• Concurrency patterns (optimistic/pessimistic locking, distributed lock, idempotency keys)
• Structured logging (Pino/structlog, correlation IDs, PII redaction)

Testing & CI/CD

• Testing pyramid (70% unit / 20% integration / 10% E2E)
• Per-framework testing (Jest, pytest, JUnit, PHPUnit)
• Docker multi-stage builds
• GitHub Actions CI templates
• Deployment strategies (blue-green, canary, rolling)

Advanced AI Patterns

• Cardinal Rules (10 inviolable rules for code quality)
• Self-Critique Loop (re-read and verify before presenting)
• Context Staleness Rule (re-read files after 5 messages)
• Verification-First Pattern (read before suggesting)
• Assumption-Driven Progress (don't block on non-critical choices)
• Negative Space Pattern (check what you didn't write)
• Batched Operations (group related file creation)
• Error Recovery with Escalation (4-level escalation)
• Leverage Pyramid (40% research, 30% planning, 20% implement, 10% verify)
• Session State Tracking (never lose track of multi-file tasks)
• Grounding Protocol (anti-hallucination with source hierarchy)
• AI-DLC Workflow (4 Hats for complex features)
• Multi-Part Execution Protocol (discover all locations → work plan → checkpoint)
• Discovery-Execute Workflow (for "fix all X" / broad requests)
• Intent Analysis Engine (AI self-parses vague/circular input without asking user)
• Loop Detection & Self-Correction (detect repeated failures → change strategy automatically)

Intelligent Prompt Engineering

• Auto-think templates (Fix/Debug, Build/Create, Review, Refactor, Multi-Part)
• Source verification checklist
• Context-needed declarations
• Patterns learned from: Anthropic, Cursor, Lovable, Manus, Windsurf, Kiro, Replit system prompts

Token Budget

| Scenario | Tokens | % of 128K | |----------|-------:|----------:| | SKILL.md only | ~14,140 | 11.0% | | Core auto-load | ~29,740 | 23.2% | | Smart load (core + 1 framework) | ~31,740 | 24.8% | | Multi-framework (3 frameworks) | ~35,740 | 27.9% | | Full load (all files) | ~106,340 | 83.1% |

Smart loading uses only 24.8% of context — 75% free for actual code work.

Per-File Breakdown (bytes ÷ 4)

| File | Bytes | Tokens | |------|------:|-------:| | SKILL.md | 56,573 | ~14,140 | | shared/code-review.md | 26,528 | ~6,630 | | shared/bug-detection.md | 22,209 | ~5,550 | | shared/architecture-intelligence.md | 18,494 | ~4,620 | | shared/intent-analysis.md | 17,270 | ~4,320 | | shared/crud-patterns.md | 15,445 | ~3,860 | | shared/prompt-engineering.md | 13,689 | ~3,420 | | shared/error-handling-impl.md | 11,554 | ~2,890 | | shared/api-design.md | 11,386 | ~2,850 | | shared/error-recovery.md | 11,096 | ~2,770 | | shared/testing-fixtures.md | 10,888 | ~2,720 | | shared/database-patterns.md | 10,789 | ~2,700 | | shared/ai-dlc-workflow.md | 9,371 | ~2,340 | | shared/pagination-patterns.md | 8,975 | ~2,240 | | shared/concurrency-patterns.md | 8,802 | ~2,200 | | shared/webhook-patterns.md | 8,496 | ~2,120 | | shared/logging-impl.md | 8,320 | ~2,080 | | shared/caching-implementation.md | 8,078 | ~2,020 | | shared/background-jobs.md | 7,732 | ~1,930 | | shared/file-handling.md | 7,646 | ~1,910 | | php/laravel.md | 9,031 | ~2,260 | | java/spring-boot.md | 8,977 | ~2,240 | | python/fastapi.md | 8,616 | ~2,150 | | python/django.md | 8,143 | ~2,040 | | nodejs/nestjs.md | 7,922 | ~1,980 | | nodejs/nextjs.md | 7,720 | ~1,930 | | shared/auth-security.md | 7,469 | ~1,870 | | shared/performance-optimization.md | 7,267 | ~1,820 | | others/go-ruby-rust.md | 7,195 | ~1,800 | | shared/microservices.md | 7,179 | ~1,800 | | nodejs/vuejs.md | 7,139 | ~1,790 | | shared/ci-cd.md | 7,051 | ~1,760 | | nodejs/express.md | 6,257 | ~1,560 | | shared/observability.md | 6,100 | ~1,530 | | shared/testing-strategy.md | 5,629 | ~1,410 | | shared/version-management.md | 4,923 | ~1,230 | | shared/common-pitfalls.md | 4,443 | ~1,110 | | humanizer/humanizer-backend.md | 3,923 | ~980 | | shared/agent-rules-template.md | 2,916 | ~730 | | shared/document-analysis.md | 2,236 | ~560 | | shared/claude-md-template.md | 1,878 | ~470 |

Supported Agents

| Agent | Type | Install | |-------|------|---------| | Claude Code | Skills directory | --claude | | Codex | Skills directory | --codex | | Gemini CLI | Skills directory | --gemini | | Kimi | Skills directory | --kimi | | Antigravity | Skills directory | --antigravity | | Cursor | Project-level | --init cursor | | Windsurf | Project-level | --init windsurf | | Cline | Project-level | --init cline | | Roo Code | Project-level | --init roocode | | Copilot | Project-level | --init copilot | | Kilo Code | Project-level | --init kilocode | | Kiro | Project-level | --init kiro |

Companion Skill

humanizer-backend is auto-installed alongside the main skill. It humanizes AI-generated code comments, API docs, and error messages.

@humanizer-backend
> "Humanize this API documentation"

License

MIT — by buivietphi