Developer tools
Tools that help people and coding agents write, review and test software.
You will find code search and review, testing, Git and GitHub helpers, editor plugins, API design, framework docs for agents and UI component kits.
Listings are what publishers declare in their ARD catalogs and the registries StealthStack reads. The category and summaries are our reading of each listing. Each listing links to its own page with the publisher's endpoint.
Code intelligenceCode reviewTesting and QAGit and version controlIDE and editorAPI designFramework docsUI componentsCoding-agent workflowsMobile developmentGame development
- SKILLcode-testing-agent Skill that generates unit tests for many languages and test frameworks.
- SKILLFlutter Add Widget Test Skill for writing Flutter widget tests with WidgetTester.
- SKILLunit-test-vue-pinia Skill to write and review unit tests for Vue 3, Vitest and Pinia codebases.
- MCP SERVERlaunchdarkly/mcp-server LaunchDarkly MCP for feature flags, AI configs, targeting and rollouts.
- SKILLruff-recursive-fix Skill running Ruff checks and applying autofixes iteratively.
- SKILLFlutter Apply Architecture Best Practices Skill for architecting Flutter apps with a layered UI, logic and data approach.
- SKILLAzure Microsoft Playwright Testing TS Skill for running Playwright tests at scale with Azure Playwright Workspaces.
- SKILLjavascript-typescript-jest Skill with recommended practices for Jest tests in JavaScript and TypeScript.
- A2A AGENTRosentic Detects semantic conflicts across active git branches before merge.
- SKILLA11Y Debugging Skill for accessibility debugging and auditing with Chrome DevTools MCP.
- MCP SERVERmicrosoft/azure-devops-mcp Azure DevOps repos, work items, builds, releases, test plans and code search.
- MCP SERVERcodacy/codacy-mcp-server Codacy API MCP: repositories, quality, coverage and security issues.
- SKILLpytest-coverage Skill running pytest with coverage and raising coverage toward 100 percent.
- SKILLFind Bugs Skill to find bugs, vulnerabilities and quality issues in branch changes.
- SKILLplaywright-generate-test Skill generating a Playwright test from a scenario using Playwright MCP.
- SKILLSema for LLM agents Compact guide for agents writing Sema code: syntax, idioms and common mistakes.
- SKILLaspnet-core Skill for building and reviewing ASP.NET Core apps with current guidance.
- SKILLwebapp-testing Skill for interacting with and testing local web apps using Playwright.
- MCP SERVERSourcegraph MCP Server Sourcegraph code search, semantic search, definitions and references.
- SKILLcsharp-mstest Skill with MSTest 3.x/4.x unit-testing recommended practices for C#.
- SKILLGH Stack Skill for managing stacked branches and pull requests with the gh-stack CLI extension.
- SKILLwriting-mstest-tests Skill for writing and fixing MSTest 3.x/4.x unit tests.
- SKILLgh-address-comments Skill to address review comments on the current branch's GitHub PR via gh.
- SKILLDogfood Skill to explore and test a web app systematically for bugs and UX issues.
- SKILLyeet Skill to stage, commit, push and open a GitHub PR in one flow via gh.
- SKILLcsharp-tunit Skill with TUnit unit-testing recommended practices for C#.
- MCP SERVERoraios/serena Semantic code retrieval and editing tools for coding agents.
- SKILLApollo Client Skill for building React apps with Apollo Client 4.x.
- SKILLApollo Server Skill for building GraphQL servers with Apollo Server 5.x.
- SKILLcoverage-analysis Skill for project-wide code coverage and CRAP score analysis in .NET.
- SKILLcsharp-xunit Skill with xUnit unit-testing recommended practices for C#.
- SKILLcsharp-nunit Skill with NUnit unit-testing recommended practices for C#.
- SKILLjava-junit Skill with JUnit 5 unit-testing recommended practices, including data-driven tests.
- SKILLgitlab Zapier connector skill for GitLab: issues, merge requests, commits and pipelines.
- APIPydantic Documentation Search API Searches Pydantic, Pydantic AI, Logfire, HTTPX2 and Monty documentation.
- MCP SERVERtrovex MCP server Serves coding agents one canonical doc per query locally to cut token use.
- SKILLmodern-python Skill that sets up Python projects with uv, ruff and ty.
- SKILLCode Simplifier Skill that simplifies code for clarity while preserving behavior.