Claude Code doesn't just have one single string for its system prompt.

Instead, there are:

• Large portions conditionally added depending on the environment and various configs.
• Descriptions for builtin tools like Write, Bash, and TodoWrite, and some are fairly large.
• Separate system prompts for builtin agents like Explore and Plan.
• Numerous AI-powered utility functions, such as conversation compaction, CLAUDE.md generation, session title generation, etc. featuring their own systems prompts.

The result—110+ strings that are constantly changing and moving within a very large minified JS file.

[!TIP] Want to modify a particular piece of the system prompt in your own Claude Code installation? Use tweakcc. It—

• lets you customize the the individual pieces of the system prompt as markdown files, and then
• patches your npm-based or native (binary) Claude Code installation with them, and also
• provides diffing and conflict management for when both you and Anthropic have conflicting modifications to the same prompt file.

Extraction

This repository contains the system prompts extracted using a script from the latest npm version of Claude Code. As they're extracted directly from Claude Code's compiled source code, they're guaranteed to be exactly what Claude Code uses. If you use tweakcc to customize the system prompts, it works in a similar way—it patches the exact same strings in your local installation as are extracted into this repository.

Prompts

Note that some prompts contain interpolated bits such as builtin tool name references, lists of available sub agents, and various other context-specific variables, so the actual counts in a particular Claude Code session will differ slightly—likely not beyond ±20 tokens, however.

Agent Prompts

Sub-agents and utilities.

Sub-agents

• Agent Prompt: Explore (494 tks) - System prompt for the Explore subagent.
• Agent Prompt: Plan mode (enhanced) (636 tks) - Enhanced prompt for the Plan subagent.

Creation Assistants

• Agent Prompt: Agent creation architect (1110 tks) - System prompt for creating custom AI agents with detailed specifications.
• Agent Prompt: CLAUDE.md creation (384 tks) - System prompt for analyzing codebases and creating CLAUDE.md documentation files.
• Agent Prompt: Status line setup (2029 tks) - System prompt for the statusline-setup agent that configures status line display.

Slash Commands

• Agent Prompt: /batch slash command (1106 tks) - Instructions for orchestrating a large, parallelizable change across a codebase.
• Agent Prompt: /review-pr slash command (211 tks) - System prompt for reviewing GitHub pull requests with code analysis.
• Agent Prompt: /schedule slash command (2486 tks) - Guides the user through scheduling, updating, listing, or running remote Claude Code agents on cron triggers via the Anthropic cloud API.
• Agent Prompt: /security-review slash command (2607 tks) - Comprehensive security review prompt for analyzing code changes with focus on exploitable vulnerabilities.

Utilities

• Agent Prompt: Agent Hook (133 tks) - Prompt for an 'agent hook'.
• Agent Prompt: Auto mode rule reviewer (257 tks) - Reviews and critiques user-defined auto mode classifier rules for clarity, completeness, conflicts, and actionability.
• Agent Prompt: Bash command description writer (207 tks) - Instructions for generating clear, concise command descriptions in active voice for bash commands.
• Agent Prompt: Bash command prefix detection (823 tks) - System prompt for detecting command prefixes and command injection.
• Agent Prompt: Claude guide agent (734 tks) - System prompt for the claude-guide agent that helps users understand and use Claude Code, the Claude Agent SDK and the Claude API effectively.
• Agent Prompt: Coding session title generator (181 tks) - Generates a title for the coding session.
• Agent Prompt: Conversation summarization (1121 tks) - System prompt for creating detailed conversation summaries.
• Agent Prompt: Determine which memory files to attach (265 tks) - Agent for determining which memory files to attach for the main agent.
• Agent Prompt: Dream memory consolidation (763 tks) - Instructs an agent to perform a multi-phase memory consolidation pass — orienting on existing memories, gathering recent signal from logs and transcripts, merging updates into topic files, and pruning the index.
• Agent Prompt: Dream memory pruning (456 tks) - Instructs an agent to perform a memory pruning pass by deleting stale or invalidated memory files and collapsing duplicates in the memory directory.
• Agent Prompt: General purpose (285 tks) - System prompt for the general-purpose subagent that searches, analyzes, and edits code across a codebase while reporting findings concisely to the caller.
• Agent Prompt: Hook condition evaluator (stop) (145 tks) - System prompt for evaluating hook conditions, specifically stop conditions, in Claude Code.
• Agent Prompt: Managed Agents onboarding flow (2247 tks) - Interactive interview script that walks users through configuring a Managed Agent from scratch — selecting tools, skills, files, environment settings — and emits setup and runtime code.
• Agent Prompt: Memory synthesis (226 tks) - Subagent that reads persistent memory files and returns a JSON synthesis of only the information relevant to each query, with cited filenames.
• Agent Prompt: Onboarding guide generator (1135 tks) - Co-authors a team onboarding guide (ONBOARDING.md) for new Claude Code users by analyzing the creator's usage data, classifying session types, and iterating on the draft collaboratively.
• Agent Prompt: Prompt Suggestion Generator v2 (296 tks) - V2 instructions for generating prompt suggestions for Claude Code.
• [Agent Prompt: Quick PR creation](./system-prompts/agent-