By haJ1t
Lean senior-engineer SDLC core: spec, architecture, frontend/backend, data/DB, testing, systematic debugging, code/security review, DevOps/SRE, ship readiness, plus guardrails and cross-cutting senior-dev workflow skills. Specialty suites ship as separate opt-in plugins.
Safely upgrades project dependencies: audit, changelog review, one-at-a-time bumps, tests green between each, lockfile pinning, rollback plan. Use when updating outdated or vulnerable packages.
Design pattern catalog, pattern selection guide, code sketches, project-type recommendations. Use when choosing the right design pattern for a problem.
Design system catalog, selection, theming, token generation from brand, and cross-system mapping/migration. Use when selecting, adopting, migrating, or tokenizing a design system.
Reproducible, containerized dev environments — devcontainers, dotfiles, tooling, and configuration as code. Use when setting up or standardizing a dev environment.
Docker, CI/CD, secrets, deployment checklist, rollback, health checks. Use when deploying, releasing, or troubleshooting CI/CD pipelines.
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107 production-grade AI agent skills across 27 installable Claude Code plugins (1 lean core
senior-dev-squadplugin with 54 skills + 26 specialty plugins with 53 skills). Complete SDLC pipeline: spec → architecture → frontend/backend → security → testing → DevOps → review → ship. Plus guardrails, orchestration, design systems, security frameworks, repo automation, MCP integration, agent platforms, marketing, product management, cross-provider teams, AI/ML engineering, compliance, distributed-systems architecture, and epic orchestration.
54 core skills + 53 specialty plugin skills = 107 skills across 27 installable plugins that turn any AI coding agent into a disciplined, production-ready development squad.
| Layer | Count | Description |
|---|---|---|
Core plugin (senior-dev-squad) | 54 skills | Cross-domain SDLC skills usable on any project |
| Specialty plugins (26) | 53 skills | Framework, database, infra, domain, product, marketing, security, AI/ML, MCP, agent platform |
| Total | 107 skills / 27 plugins |
| # | Principle |
|---|---|
| 1 | No code without spec. Agent extracts purpose, user flow, data model, edge cases, acceptance criteria first. |
| 2 | No implementation without plan. Plan breaks into atomic tasks. Each task has test + verification method. |
| 3 | Every feature proven by test. Unit, integration, e2e, a11y, security, performance — separate skills enforce each. |
| 4 | Security at every stage. Not a final review — auth, input validation, secrets, RLS, dependencies, CI, deployment — automatic gates. |
| 5 | Research before code. Compile context, search web, analyze alternatives, verify versions before writing a single line. |
| 6 | Guardrails. Context management, git hygiene, memory preservation, safety boundaries — model-invoked from their descriptions, or wired as hooks to run automatically. |
| 7 | Parallel subagents when possible. Break work into independent streams, execute concurrently, aggregate results. |
| 8 | Cross-model verification. One model writes, another reviews — catches issues a single model would miss. |
| 9 | Design is code too. Generate UIs from specs using production-grade design systems. Accessibility is non-negotiable. |
| 10 | Reviewer is ruthlessness. "It works" is not enough. Code smell, overengineering, missing tests, race conditions, security bugs, edge cases. |
| # | Skill | What It Does |
|---|---|---|
| 1 | grill | Relentlessly interviews the user one question at a time to reach shared understanding before any code is written |
| 2 | spec-first-development | Turns ideas into product specs with user stories, acceptance criteria, and edge cases |
| 3 | research-first | Compiles context, searches web, analyzes alternatives, and verifies versions before writing a single line |
| # | Skill | What It Does |
|---|---|---|
| 4 | architecture-planner | Full-stack architecture: ADRs, tradeoff tables, mermaid diagrams, CAP awareness, deployment topology |
| 5 | distributed-systems-architect | Microservices, event-driven design, data consistency, fault tolerance, multi-region, observability |
| 6 | tech-stack-advisor | Interactive tech stack selection: decision trees, tradeoff tables, stack templates |
| 7 | design-pattern-advisor | Pattern catalog with selection guide: recommends design patterns with code sketches |
| # | Skill | What It Does |
|---|---|---|
| 8 | frontend-senior-engineer | Production-grade React/Next.js: responsive, a11y, states, forms, performance |
| 9 | ui-generator | Generates production-ready UI components from specs, design system oriented |
| 10 | responsive-layout-engine | Generates responsive layouts with design system tokens for each breakpoint — mobile-first through wide screen |
| 11 | accessibility-optimizer | WCAG 2.2 AA/AAA auditing, automated fixing, and UI accessibility quality gate |
| 12 | design-system-manager | Design system catalog, selection, theming, token generation from brand, and cross-system mapping/migration |
npx claudepluginhub haj1t/senior-dev-squad-skills --plugin senior-dev-squadSmart contracts, dApps, DeFi, NFT, testing, security, gas optimization. Use when building or auditing Web3 or blockchain projects.
ETL pipelines, data warehousing, streaming, orchestration, quality, governance. Use when designing or reviewing data pipelines.
LLM security: prompt injection, guardrails, PII redaction, model access control, audit. Use when securing AI apps or auditing LLM pipelines.
ML workflows, training pipelines, model evaluation, deployment, experiment tracking. Use when building or reviewing ML systems.
Supabase auth, RLS, realtime, storage, edge functions, database design. Use when building or reviewing Supabase-backed applications.
Comprehensive skill pack with 66 specialized skills for full-stack developers: 12 language experts (Python, TypeScript, Go, Rust, C++, Swift, Kotlin, C#, PHP, Java, SQL, JavaScript), 10 backend frameworks, 6 frontend/mobile, plus infrastructure, DevOps, security, and testing. Features progressive disclosure architecture for 50% faster loading.
Develop, test, build, and deploy Godot 4.x games with Claude Code. Includes GdUnit4 testing, web/desktop exports, CI/CD pipelines, and deployment to Vercel/GitHub Pages/itch.io.
Harness-native ECC operator layer - 67 agents, 271 skills, 92 legacy command shims, reusable hooks, rules, selective install profiles, and production-ready workflows for Claude Code, Codex, OpenCode, Cursor, and related agent harnesses
Tools to maintain and improve CLAUDE.md files - audit quality, capture session learnings, and keep project memory current.
Browser automation and end-to-end testing MCP server by Microsoft. Enables Claude to interact with web pages, take screenshots, fill forms, click elements, and perform automated browser testing workflows.
Comprehensive PR review agents specializing in comments, tests, error handling, type design, code quality, and code simplification