Jeffallan's specialist skills for full-stack work: language, framework, cloud, security and testing experts your agent loads on demand.
by Jeffallan· Developer toolsUnclaimed · Yours? Claim it
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About
Fullstack Dev Skills is a community Claude Code plugin by Jeff Smolinski (Jeffallan): a pack of specialist skills for full-stack development, plus project workflow commands. Each skill is a focused expert, such as NestJS Expert, Debugging Wizard or Security Reviewer, that switches on from what you ask and loads its deeper reference files only when the task needs them. Bigger jobs chain several, for example Feature Forge, Architecture Designer, Fullstack Guardian, Test Master and DevOps Engineer for a new feature. What its skills cover - Languages: Python, TypeScript, JavaScript, Go, Rust, C++, Swift, Kotlin, C#, PHP, Java and SQL - Backend frameworks: NestJS, Django, FastAPI, Spring Boot, Laravel, Rails and .NET Core - Frontend and mobile: React, Next.js, Vue, Angular, React Native and Flutter - Infrastructure and operations: cloud architecture, Kubernetes, Terraform, DevOps, SRE, monitoring and chaos engineering - APIs and architecture: API design, GraphQL, microservices, WebSockets, CLI tools and MCP servers - Quality and security: test strategy, Playwright, code review, debugging, documentation, secure coding and security review - Data and ML: Postgres and database tuning, pandas, Spark, ML pipelines, RAG, fine-tuning and prompt engineering - Platforms: Salesforce, Shopify, WordPress, game development, embedded systems and legacy modernization - Thinking and specs: Feature Forge runs a requirements workshop and writes the spec, Spec Miner reverse-engineers specs from an undocumented codebase, and The Fool stress-tests a plan as devil's advocate, pre-mortem or red team Workflow commands (Claude Code plugin only) - /common-ground surfaces the assumptions Claude is making about your project so you can confirm or correct them. - The /project commands take an epic from discovery through planning, ticket execution and retrospectives, working with Jira and Confluence. They need an Atlassian MCP server set up. How to install it - In Claude Code: /plugin marketplace add jeffallan/claude-skills, then /plugin install fullstack-dev-skills@fullstack-dev-skills, and restart when asked. - Skills only, for other agents: npx skills add jeffallan/claude-skills. This leaves out the slash commands. Good to know - It's a community project by Jeffallan, MIT-licensed. It's built for Claude Code. - Name your stack in the request ("in my NestJS API", "my React app") so the right skills switch on.
Once it’s added
“Implement JWT authentication in my NestJS API.”
“Build a React component with Server Components.”
“My React app has a memory leak, help me debug it.”
“Review this code for security vulnerabilities.”
“Play devil's advocate on this migration plan.”
“Figure out what this undocumented codebase does and write up its spec.”
Before you add it
Reads only
Your code, configs and error messages · Its own reference guides for the stack you name · Jira and Confluence, for the /project commands, through an Atlassian MCP server
Makes changes · your agent can ask first
Code, tests and configs in your project · Specs, reviews and architecture notes · Epics, plans and tickets, when you run the /project commands
Each with its own page
From people who use it
Step by step
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Runs on your machine.
/plugin marketplace add Jeffallan/claude-skills /plugin install fullstack-dev-skills@fullstack-dev-skills
Scanned and passed · checked 9 h ago
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Plugins people install alongside Fullstack Dev Skills.
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Plugins people install alongside Fullstack Dev Skills.
Matt Pocock's everyday engineering skills: grilling sessions, specs and tickets, TDD, bug diagnosis, code review and writing for agents.
Addy Osmani's engineering workflows for coding agents: spec, plan, build, test, review and ship, with quality gates at each step.
Security scan
Passed
Safe to install in every agent it supports. Claude plugins.
