Claude Code Handbook: a marketplace of plugins and practices
Claude Code Handbook
The cc-handbook marketplace with dozens of Claude Code plugins: skills, agents, commands and MCP servers for dev, QA and .NET
- 142 ★ on the repository
- Last commit
- Apache-2.0
Extended access
Why this level
- Plugins add hooks, agents and commands to Claude Code, and some wire in external MCP servers
- Formatting and tests run automatically after edits and change project files
Install
- Works in
Manual install
claude plugin marketplace add nikiforovall/claude-code-rulesThen claude plugin install handbook@cc-handbook and any extras.
Access and checks
How we reviewExtended accessThe tool runs code or makes network calls and only reads external data.
- Plugins add hooks, agents and commands to Claude Code, and some wire in external MCP servers
- Formatting and tests run automatically after edits and change project files
This is third-party code. Review the repository files before installing.
What it does
The repository accompanies a Claude Code guide on the author's site and doubles as the `cc-handbook` marketplace. More than twenty plugins install from it. The main `handbook` carries practices and basic tools, and `handbook-extras` adds agents and commands such as `commit`, `explain`, `five-whys` and `reflect`. The `handbook-qa` plugin connects browser automation through Playwright MCP. The `handbook-dotnet` set gathers .NET skills: running files, selective tests, coverage reports, analyzers, dependencies and Roslyn queries. The `dotnet-csharpier` plugin formats C# after Claude's edits through hooks. Separate plugins wire in documentation: `handbook-microsoft-docs` uses Microsoft Learn and `handbook-context7` fetches library docs from official sources. There are plugins for spec-driven development, code review, git worktrees, GitLab and GitHub, Elasticsearch, and `handbook-discover` helps find the right plugin.
Who it is for. Claude Code developers, especially in the .NET ecosystem, who want ready plugins with vetted practices and the option to take only what they need.
Good fit when
- A C# project in Claude Code needs skills for selective tests, coverage and Roslyn queries
- C# files should be formatted by CSharpier automatically after every edit
- Microsoft Learn or Context7 documentation is wanted right in the agent session
- Development follows a specification with separate agents for requirements, design and tasks
- You want to install one plugin from the set and skip the rest
Not a fit when
- You work in Cursor or Codex: the plugins are built for Claude Code
- You need a single narrow skill without a marketplace: plugins bring agents, commands and hooks
- The project is not .NET and the C# packages are of no use: take `handbook` and the extensions you need
- You need pinned versions: the marketplace follows the repository branch and the author updates plugins
Example request
Add the cc-handbook marketplace, install the handbook and handbook-dotnet plugins and list the available skills for tests and coverage.Limitations
The plugins target Claude Code and install through its marketplace. Some features depend on third-party software: `handbook-qa` needs Playwright MCP, `handbook-dotnet` the .NET SDK and `dotnet-csharpier` an installed CSharpier. The Context7 and Microsoft Learn plugins call external services.
The plugin set changes: the marketplace grows with the author's guide, and a plugin installed earlier may gain new commands after an update. Some plugins are experimental, and the `handbook-extras` description itself marks them as experimental tools.
How to disable. Remove a plugin with `claude plugin uninstall handbook` (and likewise for each installed one), then drop the marketplace with `claude plugin marketplace remove cc-handbook`.
FAQ
How do I add the marketplace?
Run `claude plugin marketplace add nikiforovall/claude-code-rules`, then install plugins: `claude plugin install handbook@cc-handbook` and `claude plugin install handbook-extras@cc-handbook`.
Which .NET plugins are in the set?
`handbook-dotnet` with nine skills (file run, tests, coverage, analyzers, dependencies, assembly inspection, ILSpy decompilation, Roslyn queries), `dotnet-csharpier` for formatting and `handbook-csharp-lsp` for the language server.
What is handbook-qa?
A plugin for browser automation and testing through a Playwright MCP integration. It suits teams that check an interface with end-to-end scenarios.
How do I find a suitable plugin?
The set includes `handbook-discover` with a `handbook-discover` skill that suggests plugins for a task. The plugin list with descriptions is also open on the guide's site.
Is this an official Anthropic project?
No. An independent author maintains the repository, and the guide is published on his blog. The Claude Code name belongs to Anthropic.
Discussion
No questions or reviews yet.
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Comparison with similar tools
Cards that share the main search query, and how they differ.
| Tool | Official | Repository stars | Main difference |
|---|---|---|---|
| Claude Code Handbook: a marketplace of plugins and practices (this card) | no | 142 | |
| Awesome Claude Code Subagents | no | 26,506 | a catalogue of subagents with no marketplace or .NET tools |
| My Claude Code Setup | no | 2,730 | one developer's personal setup, without a plugin marketplace |
README in short
The README briefly describes marketplace installation and links to the guide site with the plugin list. Practices and techniques are collected in `BEST-PRACTICES.md` and `TIPS-AND-TRICKS.md` at the repository root. Plugin metadata lives in `.claude-plugin/marketplace.json`.