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Extend agents with skills Claude Code CLI · in the page agent-sdk/skills …run with the session's tools. The example below pre-approves `Read`, `Grep`, and `Glob` with `allowedTools` (`allowed_tools` in Python), so Claude can inspect files while running the [security-check s…

Stream responses in real-time Claude Code CLI · in the page agent-sdk/streaming-output …nclude_partial_messages=True, allowed_tools=["Read", "Bash", "Grep"], ) # Track whether we're currently in a tool call in_tool = False async for message in query( pro…

Streaming Input Claude Code CLI · in the page agent-sdk/streaming-vs-single-mode …essages(), options: { maxTurns: 10, allowedTools: ["Read", "Grep"] } })) { if (message.type === "result" && message.subtype === "success") { console.log(message.result); } } ``` `…

Get structured output from agents Claude Code CLI · in the page agent-sdk/structured-outputs …information for each one. It autonomously decides which tools to use (Grep to search, Bash to run git commands) and combines the results into a single structured response. The schema includes optiona…

Subagents in the SDK Claude Code CLI · in the page agent-sdk/subagents …actions. A `doc-reviewer` subagent might only have access to Read and Grep tools, ensuring it can analyze but never accidentally modify your documentation files. ## Create subagents ### Programmatic…

Handle approvals and user input Claude Code CLI · in the page agent-sdk/user-input …lities (for example, a read-only agent with only `Read`, `Glob`, and `Grep`), include `AskUserQuestion` in that array. Otherwise, Claude won't be able to ask clarifying questions: ```python Python th…

Best practices for Claude Code Claude Code CLI · in the page best-practices …r description: Reviews code for security vulnerabilities tools: Read, Grep, Glob, Bash model: opus --- You are a senior security engineer. Review code for: - Injection vulnerabilities (SQL, XSS, comma…

Claude Code changelog Claude Code CLI · in the page changelog …folder, and reporting an error when a search that finds nothing (rg, grep, findstr, git grep) is piped into `Select-Object` or another formatting cmdlet * Fixed Claude in the desktop app pointing you…

Claude apps gateway configuration Claude Code CLI · in the page claude-apps-gateway-config …ry settings `sandbox.bwrapPath`, `sandbox.socatPath`, and `sandbox.ripgrep` * Sandbox settings that intercept traffic, inject credentials, or weaken isolation, such as `sandbox.network.tlsTerminate` a…

Explore the .claude directory Claude Code CLI · in the page claude-directory …hen to delegate to it automatically; <C>tools:</C> limits it to Read, Grep, and Glob so it can inspect code but never edit. The body becomes the subagent's system prompt.</>, example: `---…

CLI reference Claude Code CLI · in the page cli-reference …d"`. On macOS, Linux, and WSL, the default set leaves out `Glob` and `Grep`, as described under [Glob tool behavior](/docs/en/tools-reference#glob-tool-behavior). If you name one of the [task-tracking…

Configure cloud environments Claude Code CLI · in the page cloud-environments …** | PostgreSQL 16, Redis 7.0 | | **Utilities** | git, gh, jq, yq, ripgrep, tmux, vim, nano | ¹ Bun is installed but has known [proxy compatibility issues](#install-dependencies-with-a-sessionstart-h…

Explore the context window Claude Code CLI · in the page context-window …h-specific-rules' }, { t: 0.47, kind: 'claude', label: 'grep "refreshToken"', tokens: 600, color: '#A09E96', vis: 'brief', desc: 'Search results across the codebase. You…

Manage costs effectively Claude Code CLI · in the page costs …. A single "go to definition" call replaces what might otherwise be a grep followed by reading multiple candidate files. Installed language servers also report type errors automatically after edits, s…

Desktop application Claude Code CLI · in the page desktop …ges, in one folder per session | To list one user's processes, run `pgrep -fl "$HOME/.claude/remote/"` on the remote machine as that user, or with the user's home directory in place of `$HOME`: * **…

Claude Desktop on Linux (beta) Claude Code CLI · in the page desktop-linux …ble/dists/stable/main/binary-$(dpkg --print-architecture)/Packages" | grep '^Filename: pool/main/c/claude-desktop/claude-desktop_' | sort -V | tail -n 1 | cut -d' ' -f2)" ``` If the command fails wit…

Environment variables Claude Code CLI · in the page env-vars …r). Included by default. Does not affect `@` file autocomplete, `ls`, Grep, or Read…

Error reference Claude Code CLI · in the page errors …ck expired before it ran (too many concurrent file operations)` / `ripgrep was found only by name on PATH` | [Tool errors](#refusing-after-a-symlink-changed) | | `task output swap refused (tasks dir m…

Extend Claude Code Claude Code CLI · in the page features-overview …r navigation and diagnostics | Typed languages, large codebases where grep is slow or imprecise | Jump to a symbol's definition instead of reading the whole file | | **MCP** | Connect to external serv…

Hooks reference Claude Code CLI · in the page hooks …ck-rm.sh COMMAND=$(jq -r '.tool_input.command') if echo "$COMMAND" | grep -q 'rm -rf'; then jq -n '{ hookSpecificOutput: { hookEventName: "PreToolUse", permissionDecision: "deny",…

Automate actions with hooks Claude Code CLI · in the page hooks-guide …=$(echo "$INPUT" | jq -r '.tool_input.command') if echo "$COMMAND" | grep -q "drop table"; then echo "Blocked: dropping tables is not allowed" >&2 # stderr becomes Claude's feedback exit 2…

Set up Claude Code in a monorepo or large codebase Claude Code CLI · in the page large-codebases …ver the file commands Claude Code recognizes, such as `cat`, `head`, `grep`, and `find`, when a denied path appears as an argument, and the target of a [redirection](/docs/en/permissions.md#redirectio…

Deploy managed settings Claude Code CLI · in the page managed-settings …y paths `sandbox.bwrapPath` and `sandbox.socatPath` * The sandbox `ripgrep` binary, [`sandbox.ripgrep`](/docs/en/settings-reference#sandbox-ripgrep) * `sandbox.filesystem.disabled` and `sandbox.networ…

Monitoring Claude Code CLI · in the page monitoring-usage …powershell"`, `"file"` for Read, Edit, Write, NotebookEdit, Glob, and Grep, `"web"` for WebFetch and WebSearch, `"mcp"`, or `"other"` * `tool_name`: The tool's name, such as `"Bash"` for a built-in to…

Choose a permission mode Claude Code CLI · in the page permission-modes …issions.md#working-directories). The first time Claude uses the Read, Grep, or Glob tool on a path outside them, Claude Code asks whether to allow that read. The prompt doesn't appear in non-interact…

Configure permissions Claude Code CLI · in the page permissions …ask again" behavior | | :- | :- | :- | :- | | Read-only | File reads, Grep | No, within the [working directory and additional directories](#working-directories) | N/A | | Bash commands | Shell executi…

Test plugins with evals Claude Code CLI · in the page plugin-evals …``markdown theme={null} --- max_turns: 10 allowed_tools: [Read, Glob, Grep, Skill] --- Write me a commit message for this change: I renamed getUser to fetchUser and updated the three call sites. ```…

React to events with a mod Claude Code CLI · in the page plugins/mods/events …y` requires Claude Code v2.1.304 or later. Some tools, such as Read, Grep, Glob, and WebSearch, report every call as read-only. Bash and MCP tools report a call as read-only in these cases: * **Bash…

Troubleshoot a mod Claude Code CLI · in the page plugins/mods/troubleshoot …for your mod's name: ```bash theme={null} tail -f ./mod-debug.log | grep first-mod ``` A mod that loaded has a line that names it and lists the events it handles. A mod loaded with `--plugin-dir` a…

Choose a sandbox environment Claude Code CLI · in the page sandbox-environments …e `bubblewrap` and `socat` packages as the built-in sandbox, plus `ripgrep`, which Claude Code bundles but the standalone runtime resolves from your PATH. Install `bubblewrap` and `socat` as described…

Configure the sandboxed Bash tool Claude Code CLI · in the page sandboxing …ncy is missing, the Dependencies tab in `/sandbox` lists which of `ripgrep`, `bubblewrap`, `socat`, and the seccomp filter your platform lacks. If you don't see the tab after installing and restarting…

Customize sessions in self-hosted environments Claude Code CLI · in the page self-hosted-environments-configuration …nment and ask Claude to run this command: ```bash theme={null} env | grep -E 'CLAUDE_CODE_USE_(BEDROCK|VERTEX)' ``` A line that sets `CLAUDE_CODE_USE_BEDROCK` or `CLAUDE_CODE_USE_VERTEX` to `1` mean…

Test self-hosted environments end to end Claude Code CLI · in the page self-hosted-environments-testing …al deadline=$(($(date +%s) + 90)) while :; do if [ -f "$f" ] && grep -qF -- "$expect" "$f"; then return fi [ "$(date +%s)" -lt "$deadline" ] || { echo "FAIL: '$expect' not in…

Configure server-managed settings Claude Code CLI · in the page server-managed-settings …settings**: `sandbox.bwrapPath`, `sandbox.socatPath`, and `sandbox.ripgrep`. Each of these settings points at an executable, and Claude Code runs that executable * **Sandbox network and isolation sett…

Example settings files Claude Code CLI · in the page settings-example …tools and commands that name the file, such as `cat .env`, but not [`grep -r` run over the directory](/docs/en/permissions#read-and-edit); the `sandbox` block in this file closes that gap, because th…

Advanced setup Claude Code CLI · in the page setup …thropic.com/supported-countries) ### Additional dependencies * **ripgrep**: usually included with Claude Code. If search fails, see [search troubleshooting](/docs/en/troubleshooting.md#search-and-di…

Extend Claude with skills Claude Code CLI · in the page skills …at this skill does disable-model-invocation: true allowed-tools: Read Grep --- Your skill instructions here... ``` All fields are optional. Only `description` is recommended so Claude knows when to…

Customize your status line Claude Code CLI · in the page statusline …h theme={null} #!/usr/bin/env bash input=$(cat) cwd=$(echo "$input" | grep -o '"cwd":"[^"]*"' | cut -d'"' -f4) model=$(echo "$input" | grep -o '"display_name":"[^"]*"' | cut -d'"' -f4) dirname="${cwd#…

Create custom subagents Claude Code CLI · in the page sub-agents …and best practices. Use after writing or modifying code. tools: Read, Grep, Glob model: sonnet --- You are a code improvement specialist. For each issue you find, explain the problem, show the curren…

Tools reference Claude Code CLI · in the page tools-reference …he working directory. File-access tools marked No, including `Read`, `Grep`, and `Glob`, still prompt for paths outside the [working directory and additional directories](/docs/en/permissions.md#worki…

Troubleshoot installation and login Claude Code CLI · in the page troubleshoot-install …the install folder: ```bash theme={null} echo $PATH | tr ':' '\n' | grep -Fx "$HOME/.local/bin" ``` If this prints `/Users/you/.local/bin` or `/home/you/.local/bin`, the directory is in your PATH a…

Troubleshooting Claude Code CLI · in the page troubleshooting …custom agents, or custom skills aren't finding files, the bundled `ripgrep` binary may not run on your system. Install your platform's `ripgrep` package and tell Claude Code to use it instead: **macO…

Week 17 · April 20–24, 2026 Claude Code CLI · in the page whats-new/2026-w17 …` (was `medium`)Native macOS and Linux builds replace the `Glob` and `Grep` tools with embedded `bfs` and `ugrep` available through Bash, for faster searches without a separate tool round-trip`--from-…

Week 23 · June 1–5, 2026 Claude Code CLI · in the page whats-new/2026-w23 …er needs a separate Read first when you viewed it with a single-file `grep`, `egrep`, or `fgrep`Clicking a command in the autocomplete menu now fills it into your prompt instead of running it immediat…

Set up an MCP tunnel Claude Documentation · in the page connectors/mcp-tunnels/setup …={null} kubectl -n mcp-tunnel logs deploy/mcp-tunnel -c cloudflared | grep "Registered tunnel connection" kubectl -n mcp-tunnel logs deploy/mcp-tunnel -c mcp-proxy | grep "route configured" ``` ```ba…

Chat in Claude Desktop on 3P Claude Documentation · in the page third-party/claude-desktop/chat …ct folders in a conversation that starts while a rule for `"Read"`, `"Grep"`, or `"Glob"` is set in `disabledBuiltinTools`, in `builtinToolPolicy` with a value other than `"allow"`, or as a deny or as…

Configuration reference Claude Documentation · in the page third-party/claude-desktop/configuration …t available in the sandbox of a chat started while a rule on `Read`, `Grep` or `Glob` is set: in `disabledBuiltinTools`, in `builtinToolPolicy` with a value other than `allow`, or as a deny or ask rul…

Security Model Context Protocol · in the page docs/2026-07-28/tools/inspector/security …t be re-established with `mcpdo connect`. Find a stray daemon with `pgrep mcpdod`. It sets its process title to `mcpdod`. ### What it writes to disk All in the daemon directory, which is `0700`: |…