claude-code-system-prompts/CHANGELOG.md

Claude Code System Prompts Changelog

2.1.21

+442 tokens

• NEW: System Prompt: Accessing past sessions - Instructions for searching past session data including memory summaries and transcript logs
• Tool Description: TeammateTool - Added guidance to prefer tasks in ID order (lowest ID first) when multiple tasks are available, as earlier tasks often set up context for later ones

2.1.20

-1,928 tokens

• NEW: System Prompt: Doing tasks - Instructions for performing software engineering tasks
• NEW: System Prompt: Task management - Instructions for using task management tools
• NEW: System Prompt: Tone and style - Guidelines for communication tone and response style
• NEW: System Prompt: Tool usage policy - Policies and guidelines for tool usage
• NEW: Tool Description: SendMessageTool - Tool for sending messages to teammates and handling protocol requests/responses in a swarm
• NEW: Tool Description: EnterPlanMode (ambiguous tasks) - Tool for entering plan mode when task has ambiguity
• REMOVED: System Prompt: Censoring assistance with malicious activities - Guidelines for assisting with authorized security testing
• REMOVED: System Reminder: Queued command (prompt) - Queued user message to address (prompt variant)
• REMOVED: System Reminder: Queued command - Queued user message to address
• REMOVED: System Reminder: Session memory - Past session summaries that may be relevant
• System Prompt: Main system prompt - Massively reduced from 2896 to 269 tokens; most content extracted into separate, focused system prompts (Doing tasks, Task management, Tone and style, Tool usage policy)
• Agent Prompt: Session title and branch generation - Changed output format from XML-style tags to JSON object with "title" and "branch" fields
• Agent Prompt: Bash command prefix detection - Changed from smart quotes to standard quotes
• Tool Description: TeammateTool - Removed protocol operations (approvePlan, rejectPlan, requestShutdown, approveShutdown, rejectShutdown, write, broadcast) and simplified to core team management operations
• Tool Description: TeammateTool operation parameter - Renamed from "TeammateTool's operation parameter" and condensed from 173 to 72 tokens
• Tool Description: Edit - Simplified by removing explicit read tool requirement from usage notes
• Tool Description: Write - Simplified by removing explicit read tool requirement from usage notes
• Tool Description: Bash (Git commit and PR creation instructions) - Added guidance to keep PR titles short (under 70 characters) and use description/body for details
• System Prompt: Tool execution denied - Streamlined wording
• Agent Prompt: Conversation summarization with additional instructions - Merged into base "Conversation summarization" prompt; additional instructions now added conditionally via code rather than as separate prompt string
• Agent Prompt: Prompt Hook execution - Shortened from 485 to 263 characters; removed verbose JSON formatting instructions

2.1.19

+182 tokens

• NEW: System Prompt: Tool Use Summary Generation - Prompt for generating summaries of tool usage
• REMOVED: Tool Description: TaskList - Description for the TaskList tool, which lists all tasks in the task list
• Agent Prompt: Status line setup - Added agent information (name and type) to the statusLine structure for agents started with --agent flag
• Tool Description: Skill - Updated wording from "Only use skills listed in 'Available skills' below" to "Skills listed below are available for invocation"
• Tool Description: TaskCreate - Added template variables for conditional notes and restructured task assignment instructions
• Tool Description: ToolSearch - Major expansion: reordered query modes (keyword search now first), clarified that both modes load tools immediately, added required keyword syntax with + prefix, expanded examples to show redundant selection patterns to avoid

2.1.18

_{No changes to the system prompts in v2.1.18.}

2.1.17

_{No changes to the system prompts in v2.1.17.}

2.1.16

+7,114 tokens

• NEW: Agent Prompt: Exit plan mode with swarm - System reminder for when ExitPlanMode is called with isSwarm set to true
• NEW: System Prompt: Teammate Communication - System prompt for teammate communication in swarm
• NEW: System Prompt: Tool execution denied - System prompt for when tool execution is denied
• NEW: System Reminder: Delegate mode prompt - System reminder for delegate mode
• NEW: System Reminder: Plan mode is active (5-phase) - Enhanced plan mode system reminder with parallel exploration and multi-agent planning
• NEW: System Reminder: Plan mode is active (iterative) - Iterative plan mode system reminder for main agent with user interviewing workflow
• NEW: System Reminder: Team Coordination - System reminder for team coordination
• NEW: System Reminder: Team Shutdown - System reminder for team shutdown
• NEW: Tool Description: TaskCreate - Tool description for TaskCreate tool
• NEW: Tool Description: TaskList - Description for the TaskList tool, which lists all tasks in the task list
• NEW: Tool Description: TeammateTool's operation parameter - Tool description for the TeammateTool's operation parameter
• NEW: Tool Description: TeammateTool - Tool description for the TeammateTool
• NEW: Tool Parameter: Computer action for Computer tool - Action parameter options for the Chrome browser computer tool (includes hover action and other actions)
• Agent Prompt: /security-review slash command - Renamed from "/security-review slash" for consistency
• System Prompt: Learning mode - Description metadata updated (removed "System Prompt:" prefix)
• System Reminder: Plan mode is active (subagent) - Renamed from "Plan mode is active (for subagents)" for consistency
• Tool Description: Bash (Git commit and PR creation instructions) - Added guidance to avoid using --no-edit flag with git rebase commands, as it is not a valid option for git rebase
• Tool Description: Write - Description clarified from "creating/overwriting writing individual files" to "for creating and overwriting individual files"

2.1.15

+183 tokens

• Tool Description: Bash (Git commit and PR creation instructions) - expanded Git Safety Protocol with specific list of destructive commands and added detailed explanation about potential data loss; clarified that --amend should be avoided after pre-commit hook failures; added guidance to prefer staging specific files by name rather than using "git add -A" or "git add ." to avoid accidentally including sensitive files (.env, credentials) or large binaries
• Tool Description: Task - updated background agent output retrieval instructions from using TaskOutput tool to reading output_file path with Read tool or using Bash with tail to see recent output; added conditional note about run_in_background, name, team_name, and mode parameters not being available in certain contexts

2.1.14

-1,153 tokens

• NEW: Agent Prompt: Prompt Suggestion Generator (Stated Intent) - instructions for generating prompt suggestions based on user's explicitly stated next steps
• NEW: Tool Description: ToolSearch - renamed from MCPSearch; tool description for loading and searching deferred tools before use
• REMOVED: Tool Description: ExitPlanMode v2 and ExitPlanMode v2 (security notes) - consolidated functionality into base ExitPlanMode
• REMOVED: Tool Description: MCPSearch and MCPSearch (with available tools) - replaced by ToolSearch
• Tool Description: ExitPlanMode - added "How This Tool Works" section explaining plan file workflow; clarified that tool reads from plan file rather than taking plan as parameter; simplified "Handling Ambiguity in Plans" section to "Before Using This Tool" with clearer guidance on when to use AskUserQuestion; removed variable references in favor of direct tool names
• Tool Description: Bash - clarified session persistence behavior: "Working directory persists between commands; shell state (everything else) does not. The shell environment is initialized from the user's profile (bash or zsh)"
• Tool Description: WebFetch - added guidance to prefer gh CLI via Bash for GitHub URLs (e.g., gh pr view, gh issue view, gh api)
• System Prompt: Chrome browser MCP tools - updated to reference ToolSearch instead of MCPSearch

2.1.12

_{No changes to the system prompts in v2.1.12.}

2.1.11

_{No changes to the system prompts in v2.1.11.}

2.1.10

-118 tokens

• Agent Prompt: Session title and branch generation - added explicit instruction to use sentence case for titles (capitalize only the first word and proper nouns), not Title Case
• Tool Description: Bash (Git commit and PR creation instructions) - simplified git commit --amend guidance by removing complex conditional rules (5 conditions about when amending is allowed); replaced with simpler CRITICAL directive to always create new commits and never use --amend unless user explicitly requests it; removed reference to "amend rules above" in pre-commit hook failure step

2.1.9

+963 tokens

• NEW: System Prompt: Hooks Configuration - system prompt for hooks configuration, used for Claude Code config skill
• REMOVED: System Prompt: Autonomous agent (standalone) - standalone autonomous agent mode prompt without system context prefix
• REMOVED: System Prompt: Autonomous agent (with context) - autonomous agent mode prompt prefixed with main system prompt
• System Prompt: Main system prompt - renamed "Planning without timelines" section to "No time estimates"; expanded guidance to explicitly prohibit giving time estimates for Claude's own work (e.g., "this will take me a few minutes," "should be done in about 5 minutes," "this is a quick fix") in addition to existing prohibition on suggesting project timelines; added emphasis that users should judge timing themselves

2.1.8

-101 tokens

• System Reminder: Plan mode is active - extracted inline plan file info section into separate, new section; converted hardcoded phase numbers (2-5) to dynamic variables for conditional user interview phase; replaced user interview guidance with a new phase explicitly for user interview
• Tool Description: WebSearch - updated year example to use the current year instead of hardcoded year value

2.1.7

+74 tokens

• NEW: Tool Description: ExitPlanMode v2 (security notes) - security guidelines for scoping permissions when using the ExitPlanMode tool
• System Prompt: Claude in Chrome browser automation - added IMPORTANT emphasis to alerts and dialogs warning about blocking browser events
• System Reminder: Plan mode is active - clarified that plan approval questions (e.g., "Is this plan okay?", "Should I proceed?") must use ExitPlanMode tool, not text questions or AskUserQuestion; expanded guidance distinguishing when to use AskUserQuestion (only for requirements/approach clarification) vs ExitPlanMode (for plan approval)
• Tool Description: ExitPlanMode v2 - extracted detailed security and permission scoping guidelines to new PERMISSION_SCOPING_GUIDELINES variable; replaced inline scoping instructions with variable reference; updated tool name references from ASK_USER_QUESTION_TOOL_NAME to PERMISSION_SCOPING_GUIDELINES in "Before Using This Tool" and "Important" sections

2.1.6

+742 tokens

• NEW: System Prompt: Autonomous agent (standalone) - standalone autonomous agent mode prompt without system context prefix
• NEW: System Prompt: Autonomous agent (with context) - autonomous agent mode prompt prefixed with main system prompt
• REMOVED: Agent Prompt: Bash command explainer - removed in favor of integrated bash command explanation
• Agent Prompt: Status line setup - added pre-calculated used_percentage and remaining_percentage fields to context_window object; updated examples to use simpler syntax for displaying context usage
• Agent Prompt: Claude guide agent - fixed incorrect variable references in documentation source URLs and tool names throughout approach steps
• Agent Prompt: Session Search Assistant - simplified introduction text
• Tool Description: Bash - refactored variable usage, replacing BASH_TOOL_NAME with RUN_IN_BACKGROUND_NOTE
• Tool Description: ExitPlanMode v2 - added comprehensive "Requesting Permissions (allowedPrompts)" section with guidelines for requesting prompt-based permissions for bash commands, including security-conscious scoping practices

2.1.5

-24 tokens

• Tool Description: Bash - replaced GIT_COMMIT_AND_PR_CREATION_INSTRUCTION variable with BASH_TOOL_NAME variable in metadata
• Tool Description: Task - reordered variable declarations, moving IS_TRUTHY_FN and PROCESS_OBJECT earlier in the list

2.1.4

-19 tokens

• Tool Description: Bash - moved run_in_background parameter documentation to new BASH_BACKGROUND_TASK_NOTES_FN function variable; added BASH_TOOL_EXTRA_NOTES() placeholder; fixed misaligned variable references in dedicated tools list (file search, content search, read files, edit files, write files were each referencing the wrong tool name)
• Tool Description: Task - added IS_TRUTHY_FN and PROCESS_OBJECT variables for conditional rendering; background task instructions now conditionally rendered based on CLAUDE_CODE_DISABLE_BACKGROUND_TASKS environment variable

2.1.3

+1,047 tokens

• NEW: Agent Prompt: Bash command description writer - instructions for generating clear, concise command descriptions in active voice for bash commands
• NEW: Agent Prompt: Bash command explainer - instructions for explaining bash commands with reasoning, risk assessment, and risk level classification
• NEW: Agent Prompt: Remember skill - system prompt for the /remember skill that reviews session memories and updates CLAUDE.local.md with recurring patterns and learnings
• REMOVED: Agent Prompt: Bash command risk classifier - replaced with the new bash command explainer agent
• Tool Description: Bash - updated description field instructions to provide more context for complex commands (piped commands, obscure flags, etc.) while keeping simple commands brief
• Tool Description: Bash (Git commit and PR creation instructions) - added warning to never use git status -uall flag as it can cause memory issues on large repos
• Tool Description: Task - updated internal variable references and improved background agent monitoring instructions

2.1.2

-374 tokens

• NEW: Agent Prompt: Bash command risk classifier - classifies shell commands by risk level (LOW/MEDIUM/HIGH) to determine permission requirements
• REMOVED: Agent Prompt: Bash output summarization - system prompt for determining whether bash command output should be summarized
• REMOVED: Agent Prompt: Plan verification agent - agent prompt for verifying that the main agent correctly executed a plan

2.1.1

_{No changes to the system prompts in v2.1.1.}

2.1.0

_{No changes to the system prompts in v2.1.0.}

2.0.77

-128 tokens

• NEW: Agent Prompt: Task tool (extra notes) - additional notes for Task tool usage (absolute paths, no emojis, no colons before tool calls)
• NEW: Agent Prompt: Command execution specialist - agent prompt for command execution focusing on bash commands
• NEW: Agent Prompt: Plan verification agent - agent prompt for verifying that the main agent correctly executed a plan
• NEW: System Prompt: Chrome browser MCP tools - instructions for loading Chrome browser MCP tools via MCPSearch before use
• REMOVED: Data: GitHub Actions workflow for automated code review (beta) - GitHub Actions workflow template for automated Claude Code reviews
• REMOVED: Tool Description: Task (async return note) - message returned to the model when a subagent launched successfully
• Agent Prompt: Agent creation architect - updated examples from code-reviewer to test-runner agent
• Agent Prompt: Status line setup - added vim mode information (INSERT/NORMAL) to available session data
• System Prompt: Main system prompt - removed "Looking up your own documentation" section with claude-guide agent instructions; added instruction about not using colons before tool calls; numerous variable reference corrections throughout
• System Reminder: Plan mode is active - added verification section requirement in plan files; clarified that AskUserQuestion is for clarifying requirements, not for plan approval
• Tool Description: AskUserQuestion - added plan mode note clarifying this tool is for clarifying requirements before finalizing plans, not for requesting plan approval
• Tool Description: Bash - updated run_in_background parameter description to clarify notification behavior
• Tool Description: Bash (Git commit and PR creation instructions) - simplified parallel command instructions; removed "You can call multiple tools in a single response" preambles; added GIT_COMMAND_PARALLEL_NOTE variable
• Tool Description: ExitPlanMode v2 - reorganized "Handling Ambiguity in Plans" section into "Before Using This Tool"; added clarification that this tool inherently requests user approval
• Tool Description: Skill - reformatted instructions removing XML wrapper tags; added check for already-loaded skills
• Tool Description: Task - updated background agent output retrieval instructions (now uses output_file with Read/Write tools instead of AgentOutputTool); removed pro-only parallel launch note; updated example agent from code-reviewer to test-runner

2.0.76

_{No changes to the system prompts in v2.0.76.}

2.0.75

-183 tokens

• REMOVED: Agent Prompt: Task tool (extra notes) - additional notes for Task tool usage (absolute paths, no emojis, no colons before tool calls)
• Main system prompt - removed instruction about not using colons before tool calls

2.0.74

-1693 tokens

• NEW: Agent Prompt: Session Search Assistant - agent prompt for finding relevant sessions based on user queries, with priority matching on tags, titles, branches, summaries, and transcripts
• REMOVED: Agent Prompt: Exit plan mode with swarm - instructions for launching swarm teammates when ExitPlanMode is called with isSwarm set to true
• REMOVED: System Reminder: Delegate mode prompt - system reminder for delegate mode with restricted tool access
• REMOVED: System Reminder: Team Coordination - system reminder for team coordination with teammate identity and resources
• REMOVED: Tool Description: TaskList - tool for listing all tasks in the task list
• REMOVED: Tool Description: TaskUpdate - tool for updating task status and adding comments
• REMOVED: Tool Description: TeammateTool's operation parameter - description of TeammateTool operations
• Tool Description: Bash (Git commit and PR creation instructions) - simplified pre-commit hook failure handling; removed detailed amend rules for auto-modified files, now just advises to fix and create a new commit

2.0.73

+91 tokens

• NEW: Agent Prompt: Prompt Suggestion Generator v2 - V2 instructions for generating prompt suggestions, focusing on predicting what the user would naturally type next
• REMOVED: Tool Description: SlashCommand - functionality merged into Skill tool
• Tool Description: Skill - added guidance for invoking skills via slash command syntax (e.g., "/commit"), added args parameter for passing arguments to skills
• Tool Description: LSP - added call hierarchy operations (prepareCallHierarchy, incomingCalls, outgoingCalls)
• Tool Description: TeammateTool's operation parameter - added team discovery and join operations (discoverTeams, requestJoin, approveJoin, rejectJoin)
• Main system prompt - terminology update: "slash commands" → "skills"; removed duplicate "complete tasks fully" instruction
• Agent Prompt: Claude guide agent - terminology update: "slash commands" → "skills"

2.0.72

+47 tokens

• Tool Description: Task - Added usage note requiring a short description (3-5 words) summarizing what the agent will do
• Tool Description: TaskUpdate - Added "Staleness" section with instruction to read task's latest state using TaskGet before updating

2.0.71

+948 tokens

• NEW: System Prompt: Claude in Chrome browser automation - instructions for using Claude in Chrome browser automation tools effectively
• NEW: Tool Description: Computer - main description for the Chrome browser computer automation tool
• NEW: Tool Description: Computer action parameter - description for the computer action parameter used with the Computer tool
• Tool Description: Bash (Git commit and PR creation instructions) - expanded amend safety rules with explicit conditions: (1) user requested OR hook auto-modified files, (2) HEAD was created by you, (3) not yet pushed; added critical warnings for rejected hooks and already-pushed commits; clarified hook failure vs auto-modification handling
• REMOVED: Agent Prompt: Prompt suggestion generator
• REMOVED: System Reminder: MCP CLI large output

2.0.70

+2283 tokens

• NEW: Agent Prompt: /review-pr slash command - system prompt for reviewing GitHub PRs with code analysis
• NEW: Agent Prompt: Task tool (extra notes) - additional notes for Task tool usage (absolute paths, no emojis, no colons before tool calls)
• NEW: System Reminder: Delegate mode prompt - system reminder for delegate mode with restricted tool access
• NEW: Tool Description: MCPSearch - tool for searching/selecting MCP tools before use (mandatory prerequisite)
• NEW: Tool Description: MCPSearch (with available tools) - MCPSearch variant that lists available MCP tools
• NEW: Tool Description: TaskList - tool for listing all tasks in the task list
• NEW: Tool Description: TeammateTool's operation parameter - description of TeammateTool operations (spawn, assignTask, claimTask, shutdown, etc.)
• Agent Prompt: Status line setup - Added current_usage object to context_window schema with input_tokens, output_tokens, cache_creation_input_tokens, and cache_read_input_tokens fields; added example for calculating context window percentage
• Tool Description: TaskUpdate - Added instruction to call TaskList after resolving a task; added note about teammates adding comments while working

2.0.69

_{No changes to the system prompts in v2.0.69.}

2.0.68

-191 tokens

• Main system prompt: Added instruction to not use colons before tool calls ("Let me read the file." instead of "Let me read the file:")
• REMOVED: Agent Prompt: /review-pr slash command

2.0.67

_{No changes to the system prompts in v2.0.67.}

2.0.66

+172 tokens

• NEW: System Prompt: Scratchpad directory - instructions for using a dedicated session-specific scratchpad directory for temporary files instead of /tmp

2.0.65

+97 tokens

• Agent Prompt: Status line setup - Added context_window object to status line data schema with total_input_tokens, total_output_tokens, and context_window_size fields
• LSP tool: Added goToImplementation operation; changed line/character documentation from 0-indexed to 1-based

2.0.64

_{No changes to the system prompts in v2.0.64.}

2.0.63

+10 tokens

• Main system prompt: Added BUILD_TIME to config variables interpolation

2.0.62

+381 tokens

• NEW: AskUserQuestion tool description - includes guidance on recommending options by adding "(Recommended)" to labels
• Main system prompt: Added instruction to complete tasks fully without stopping mid-task or claiming context limits prevent completion
• EnterPlanMode tool: Major rewrite encouraging proactive use for non-trivial tasks; expanded "when to use" examples including new features and code modifications; shifted guidance from "err on implementation" to "err on planning"
• Skill tool: Added blocking requirement to invoke skill tool immediately as first action when relevant, before generating any other response
• Task tool: Added resume parameter documentation for continuing agents with preserved context; clarified agent ID return for follow-up work
• WebFetch tool: Simplified MCP tool preference note (removed "All MCP-provided tools start with mcp__")

2.0.61

_{No changes to the system prompts in v2.0.61.}

2.0.60

+1339 tokens

• NEW: System Reminder: Team Coordination - instructions for team-based multi-agent workflows with team config, task list paths, and teammate messaging
• NEW: Agent Prompt: Exit plan mode with swarm - instructions for launching worker swarms when ExitPlanMode is called with isSwarm enabled
• Agent Prompt: Claude Code guide agent → renamed to Claude guide agent with expanded scope covering Claude Code, Claude Agent SDK, and Claude API (formerly Anthropic API)
• Task tool: Added run_in_background parameter documentation and TaskOutput tool usage for retrieving background agent results
• TaskUpdate tool: Major expansion with task ownership requirements, team coordination, claiming tasks, and detailed field documentation
• WebFetch tool: Added conditional instructions based on trusted domain status (simpler instructions for trusted domains)
• REMOVED: System Prompt: whenToUse note for claude-code-guide subagent (functionality merged into updated guide agent)

2.0.59

+140 tokens

• NEW: Added new TaskUpdate tool which allows Claude to update the task list.

2.0.58

+21 tokens

• Session notes template: Added new "Current State" section for tracking active work and pending tasks
• Session notes template: Renamed "User Corrections / Mistakes" to "Errors & Corrections" with expanded description
• Session notes instructions: Added emphasis on updating "Current State" for continuity after compaction
• Session notes instructions: Removed instruction about not repeating past session summaries
• Session notes instructions: Fixed markdown header reference ('##' → '#')
• Documentation URL: Changed from docs.claude.com/s/claude-code to code.claude.com/docs/en/overview
• GitHub Action templates: Updated CLI reference URL to code.claude.com/docs/en/cli-reference

2.0.57

_{No changes to the system prompts in v2.0.57.}

2.0.56

-134 tokens

• Reinforced note about using the current year in the WebSearch tool description
• Added a note to the main system prompt instructing Claude to never include time estimates when presenting options or plans.
• Strengthened and elaborated "plan mode is active" system reminder
• Encouraged the Explore subagent to be more tool-call-efficient and token-efficient
• Added an instruction to "Read any files provided to you in the initial prompt" to the Plan subagent
• Changed the theme of the prompt suggestion generator's prompt from "predict what the user will type next" to "suggest what Claude could help with"
• Stopped directing the user to open a GH an on the Claude Code repo via /feedback when the claude-code-guide subagent is at a loss
• Removed the old plan mode's system reminder

2.0.55

+121 tokens

• NEW: Added Agent Prompt: Suggested Prompt Generator for suggesting a followup propmt after Claude response. Requires tweakcc to enable the functionality in Claude Code: run npx tweakcc@latest --apply and then claude and then send a message.
• Modified interpolated formatting code in mcp-cli prompt

2.0.54

+128 tokens

• Multi-Agent Planning Note: Added a note discouraging overuse of multiple plan agents: If the task is simple, you should try to use the minimum number of agents necessary (usually just 1)
• Added a similar longer note to the "Plan mode is active" system reminder

2.0.53

_{No changes to the system prompts in v2.0.53.}

2.0.52

+42 tokens

• Add a 4th note to the procedure steps in the Plan Mode Re-entry System Prompt: "Continue on with the plan process and most importantly you should always edit the plan file one way or the other before calling ExitPlanMode."

2.0.51

+906 tokens

• NEW: Prompt for the new EnterPlanMode tool.
• NEW: Prompt for agent hooks.

2.0.50

+465 tokens

• NEW: System reminder sent when an mcp-cli read or mcp-cli call output is longer than the MAX_MCP_OUTPUT_TOKENS environment variable (defaults to 25000)
• WebSearch tool description: Added a "CRITICAL REQUIREMENT" to include a "Sources:" section whenever performing a web search.
• Session notes template: Added a "Key results" section including "specific outputs" such as "an answer to question, a table, or other document."

2.0.49

• Explore & Plan agents:
  • Enhanced READ-ONLY restrictions with explicit bulleted list of prohibited operations
  • Added note that file editing tools are not available
  • Reformatted Bash tool restrictions for clarity

2.0.48 – This version does not exist.

2.0.47

• NEW: Agent prompt: Multi-Agent Planning Note - instructions for multi-agent planning when CLAUDE_CODE_PLAN_V2_AGENT_COUNT > 1
• NEW: System reminder: Plan mode re-entry - sent when user re-enters Plan mode after exiting
• Main system prompt: Added "NEVER propose changes to code you haven't read" instruction
• Main system prompt: Added comprehensive "Avoid over-engineering" section with guidelines on simplicity
• Enhanced plan mode reminder: Refactored variable names and simplified structure
• Enhanced plan mode reminder: Fixed typo "Syntehsize" → "Synthesize", "alwasy" → "always"

2.0.46

_{No changes to the system prompts in v2.0.46.}

2.0.45

• NEW: Agent prompt: Claude Code guide agent for helping users with Claude Code and Agent SDK
• NEW: Agent prompt: Session title and branch generation (replaces session title generation)
• NEW: System prompt: whenToUse note for claude-code-guide subagent
• Main system prompt: Updated to use Task tool with claude-code-guide subagent instead of WebFetch for documentation lookup
• Enhanced plan mode reminder: Added parallel exploration support with PLAN_V2_EXPLORE_AGENT_COUNT
• REMOVED: Agent prompt: Session title generation (replaced by session title and branch generation)

2.0.44

_{No changes to the system prompts in v2.0.44.}

2.0.43

• NEW: Tool description: ExitPlanMode v2
• NEW: System reminder: Plan mode is active (for subagents)
• Main system prompt: Added "Planning without timelines" section
• Main system prompt: Added instruction to avoid backwards-compatibility hacks
• Enhanced plan mode reminder: Major restructuring with plan file support and variable updates

2.0.42

_{No changes to the system prompts in v2.0.42.}

2.0.41

• NEW: Agent prompt: Plan mode (enhanced)
• NEW: System reminder: Plan mode is active (enhanced)
• Explore agent: Strengthened READ-ONLY restrictions with explicit forbidden commands
• Prompt Hook execution: Fixed JSON format (added quotes around keys)
• Main system prompt: Added FEEDBACK_CHANNEL variable

2.0.40 – This version does not exist.

2.0.39 – This version does not exist.

2.0.38 – This version does not exist.

2.0.37

• NEW: Agent prompt: Prompt Hook execution
• Main system prompt: Changed isCodingRelated to keepCodingInstructions

2.0.36

• MCP CLI: Added mcp-cli read command for reading resources
• Main system prompt: Removed empty bullet point in "Doing tasks" section
• Skill tool: Updated examples to use skill: instead of command:
• SlashCommand tool: Removed "Intent Matching" section, simplified formatting

2.0.35

_{No changes to the system prompts in v2.0.35.}

2.0.34

• NEW: System prompt: MCP CLI instructions
• Main system prompt: Added "Asking questions as you work" section with ASKUSERQUESTION_TOOL_NAME
• Task tool: Added note about agents with "access to current context"
• Bash sandbox note: Added CONDITIONAL_NEWLINE_IF_SANDBOX_ENABLED variable

2.0.33

• Main system prompt: Removed extra blank lines

2.0.32

_{No changes to the system prompts in v2.0.32.}

2.0.31

_{No changes to the system prompts in v2.0.31.}

2.0.30

• NEW: Agent prompt: Update Magic Docs
• NEW: Tool description: LSP
• Main system prompt: Added security warning for OWASP top 10 vulnerabilities
• Plan mode reminder: Clarified AskUserQuestion tool usage
• ExitPlanMode tool: Added "Handling Ambiguity in Plans" section with example
• Bash sandbox note: Removed RESTRICTIONS_LIST and temp file instructions
• REMOVED: Agent prompt: Output style creation

2.0.29

• Task tool: Re-added runsInBackground property and AgentOutputTool usage note

2.0.28

• Main system prompt: Added "Avoid using over-the-top validation or excessive praise" guidance
• Plan mode reminder: Added NOTE_ABOUT_USING_PLAN_SUBAGENT variable
• Task tool: Removed runsInBackground property and background agent instructions

2.0.27

_{No changes to the system prompts in v2.0.27.}

2.0.26

• Bash sandbox note: Renamed dangerouslyOverrideSandbox to dangerouslyDisableSandbox

2.0.25

• Session notes template: Added "Session Title" section
• Session notes update instructions: Enhanced with multi-edit support and clearer structure preservation rules
• Bash tool: Removed note about not using run_in_background with 'sleep'

2.0.24

• NEW: Tool description: Bash (sandbox note)

2.0.23 – This version does not exist.

2.0.22

_{No changes to the system prompts in v2.0.22.}

2.0.21

• Plan mode reminder: Added NOTE_ABOUT_AskUserQuestion variable
• ExitPlanMode tool: Added NOTE_ABOUT_AskUserQuestion variables

2.0.20

• NEW: Tool description: Skill

2.0.19

_{No changes to the system prompts in v2.0.19.}

2.0.18

• Explore agent: Changed "Be thorough" guideline to "Adapt your search approach based on the thoroughness level specified by the caller"

2.0.17

• Main system prompt: Added critical instruction to use Task tool with Explore subagent for codebase exploration
• Main system prompt: Added examples for when to use Explore agent vs direct search
• Main system prompt: Added new variables (EXPLORE_AGENT, GLOB_TOOL_NAME, GREP_TOOL_NAME)

2.0.16 – This version does not exist.

2.0.15

• Updated ExitPlanMode tool description formatting (added "Examples" header)
• Minor punctuation fix in plan mode reminder

2.0.14

Initial comprehensive system prompts collection.

Agent Prompts:

• Agent creation architect
• Bash command file path extraction
• Bash command prefix detection
• Bash output summarization
• Claude.md creation
• Conversation summarization (with additional instructions variant)
• Explore agent
• Output style creation
• PR comments slash command
• Review PR slash command
• Security review slash command
• Session notes template and update instructions
• Session title generation
• Status line setup
• Task tool agent
• User sentiment analysis
• WebFetch summarizer

GitHub Integration:

• GitHub Actions workflow for @claude mentions
• GitHub Actions workflow for automated code review (beta)
• GitHub App installation PR description

System Prompts:

• Main system prompt
• Learning mode and learning mode insights
• Plan mode is active reminder

Tool Descriptions:

• Bash (with git commit and PR creation instructions)
• Edit
• ExitPlanMode
• Glob
• Grep
• NotebookEdit
• Read file
• SlashCommand
• Task (with async return note)
• TodoWrite
• WebFetch
• WebSearch
• Write