How Claude Code works changedhow-claude-code-works
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3535The built-in tools generally fall into five categories, each representing a different kind of agency.
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37| Category | What Claude can do |
38| --------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
39| **File operations** | Read files, edit code, create new files, rename and reorganize |
40| **Search** | Find files by pattern, search content with regex, explore codebases |
41| **Execution** | Run shell commands, start servers, run tests, use git |
42| **Web** | Search the web, fetch documentation, look up error messages |
37| Category | What Claude can do |
38| - | - |
39| **File operations** | Read files, edit code, create new files, rename and reorganize |
40| **Search** | Find files by pattern, search content with regex, explore codebases |
41| **Execution** | Run shell commands, start servers, run tests, use git |
42| **Web** | Search the web, fetch documentation, look up error messages |
4343| **Code intelligence** | See type errors and warnings after edits, jump to definitions, find references (requires [code intelligence plugins](/docs/en/plugins/code-intelligence)) |
4444
4545These are the primary capabilities. Claude also has tools for spawning subagents, asking you questions, and other orchestration tasks. See [Tools available to Claude](/docs/en/tools-reference) for the complete list.
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7979Claude Code runs in three environments, each with different tradeoffs for where your code executes.
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81| Environment | Where code runs | Use case |
82| ------------------ | ------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------- |
83| **Local** | Your machine | Default. Full access to your files, tools, and environment |
84| **Cloud** | Anthropic-managed VMs, or [self-hosted environments](/docs/en/self-hosted-environments) your organization operates | Offload tasks, work on repos you don't have locally |
85| **Remote Control** | Your machine, controlled from a browser | Use the web UI while execution and your files stay local |
81| Environment | Where code runs | Use case |
82| - | - | - |
83| **Local** | Your machine | Default. Full access to your files, tools, and environment |
84| **Cloud** | Anthropic-managed VMs, or [self-hosted environments](/docs/en/self-hosted-environments) your organization operates | Offload tasks, work on repos you don't have locally |
85| **Remote Control** | Your machine, controlled from a browser | Use the web UI while execution and your files stay local |
8686
8787### Interfaces
8888
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