Claude Code Unpacked

What actually happens when you type a message into Claude Code? The agent loop, 50+ tools, multi-agent orchestration, and unreleased features, mapped straight from the source.

Files

0K+

Lines of Code

Tools

Commands

Start exploring↓

The Agent Loop

From keypress to rendered response, step by step through the source.

Input

Message

History

System

API

Tokens

Tools?

Loop

Render

Hooks

Await

1Input2Message3History4System5API6Tokens7Tools?8Loop9Render10Hooks11Await

Watch what happens when you send a message to Claude Code

1User Input

src/components/TextInput.tsx

User types a message or pipes input through stdin

● claude-code

Keyboard input comes from Ink's TextInput component. In non-interactive mode, it reads from piped stdin instead.

1/11

0.5x1x2x

Architecture Explorer

Click around the source tree to explore what's inside.

Tools & Commands

Core Processing

UI Layer

Infrastructure

Support & Utilities

Personality & UX

src

utils/564 filescomponents/389 filescommands/189 filestools/184 filesservices/130 fileshooks/104 filesink/96 filesbridge/31 filesconstants/21 filesskills/20 filescli/

Tool System

Every built-in tool Claude Code can call, sorted by what it does.

File Operations

6 tools

FileReadFileEditFileWriteGlobGrepNotebookEdit

Execution

3 tools

BashPowerShellREPL

Search & Fetch

4 tools

WebBrowser🔒WebFetchWebSearchToolSearch

Agents & Tasks

11 tools

AgentSendMessageTaskCreateTaskGetTaskListTaskUpdateTaskStopTaskOutputTeamCreateTeamDeleteListPeers🔒

Planning

5 tools

EnterPlanModeExitPlanModeEnterWorktreeExitWorktreeVerifyPlanExecution🔒

MCP

4 tools

mcpListMcpResourcesReadMcpResourceMcpAuth

System

11 tools

AskUserQuestionTodoWriteSkillConfigRemoteTrigger🔒CronCreate🔒CronDelete🔒CronList🔒Snip🔒Workflow🔒TerminalCapture🔒

Experimental

8 tools

SleepSendUserMessageStructuredOutput🔒LSP🔒SendUserFile🔒PushNotification🔒Monitor🔒SubscribePR🔒

Click a tool to see details and source code

Command Catalog

Every slash command available in Claude Code, sorted by what it does.

Setup & Config12

/init/login/logout/config/permissions/model/theme/terminal-setup/doctor/onboarding/mcp/hooks

Daily Workflow24

/compact/memory/context/plan/resume/session/files/add-dir/copy/export/summary/clear/brief/output-style🔒/color/vim/keybindings/skills/tasks/agents/fast/effort/extra-usage/rate-limit-options

Code Review & Git13

/review/commit/commit-push-pr/diff/pr_comments/branch/issue/security-review/autofix-pr🔒/share/install-github-app🔒/install-slack-app🔒/tag

Debugging & Diagnostics23

/status/stats/cost/usage/version/feedback/think-back/thinkback-play/rewind/ctx_viz/debug-tool-call/perf-issue/heapdump/ant-trace/backfill-sessions🔒/break-cache🔒/bridge-kick🔒/mock-limits🔒/oauth-refresh🔒/reset-limits🔒/env/bughunter🔒/passes🔒

Advanced & Experimental23

/advisor/ultraplan🔒/remote-control🔒/teleport/voice🔒/desktop🔒/chrome🔒/mobile🔒/sandbox/plugin/reload-plugins/web-setup/remote-env/ide/stickers/good-claude/btw/upgrade/release-notes/privacy-settings/help/exit/rename

Click a command to see details and source code

Hidden Features

Stuff that's in the code but not shipped yet. Feature-flagged, env-gated, or just commented out.

Buddy

A virtual pet that lives in your terminal. Species and rarity are derived from your account ID.

Kairos

Persistent mode with memory consolidation between sessions and autonomous background actions.

UltraPlan

Long planning sessions on Opus-class models, up to 30-minute execution windows.

Coordinator Mode

A lead agent breaks tasks apart, spawns parallel workers in isolated git worktrees, collects results.

Bridge

Control Claude Code from your phone or a browser. Full remote session with permission approvals.

Daemon Mode

Run sessions in the background with --bg. Uses tmux under the hood.

UDS Inbox

Sessions talk to each other over Unix domain sockets.

Auto-Dream

Between sessions, the AI reviews what happened and organizes what it learned.

Click a feature to explore