# Claude Code v2.1.243: system prompt

> 1 added and 0 removed, of 223 lines, in the prompt 17 of 27 arms receive. 3 other prompts also changed. Compared against v2.1.242.

The two arm counts on this page measure different things: 17 arms receive the prompt the headline is about, and the widest edit below reached 27, because the same changed lines sit in more than one prompt.

Web version: https://changelogs.core-directive.com/prompts/2.1.243?arm=sdk-cli&config=flags-account

## What this version holds
- model strings captured: 27
- tool descriptions: 27
- compared against: v2.1.242
- system prompt edits: 1
- widest system prompt edit: +2/-0 lines
- tool descriptions changed: 0

## What moved

### System prompt (+2/-0 lines)

This edit reached all 27 arms.

The same edit landed in 2 other copies of this prompt, which differ from this one only in text interpolated per model.

```diff
@@ from line 219 @@
 
 # Context management
 When the conversation grows long, some or all of the current context is summarized; the summary, along with any remaining unsummarized context, is provided in the next context window so work can continue — you don't need to wrap up early or hand off mid-task.
+
+<total_tokens>15000000 tokens left</total_tokens>
```

## Tool descriptions
- Agent: https://changelogs.core-directive.com/prompts/2.1.243/tools/Agent.txt?arm=sdk-cli&config=flags-account
- Bash: https://changelogs.core-directive.com/prompts/2.1.243/tools/Bash.txt?arm=sdk-cli&config=flags-account
- CronCreate: https://changelogs.core-directive.com/prompts/2.1.243/tools/CronCreate.txt?arm=sdk-cli&config=flags-account
- CronDelete: https://changelogs.core-directive.com/prompts/2.1.243/tools/CronDelete.txt?arm=sdk-cli&config=flags-account
- CronList: https://changelogs.core-directive.com/prompts/2.1.243/tools/CronList.txt?arm=sdk-cli&config=flags-account
- Edit: https://changelogs.core-directive.com/prompts/2.1.243/tools/Edit.txt?arm=sdk-cli&config=flags-account
- EnterWorktree: https://changelogs.core-directive.com/prompts/2.1.243/tools/EnterWorktree.txt?arm=sdk-cli&config=flags-account
- ExitWorktree: https://changelogs.core-directive.com/prompts/2.1.243/tools/ExitWorktree.txt?arm=sdk-cli&config=flags-account
- ListAgents: https://changelogs.core-directive.com/prompts/2.1.243/tools/ListAgents.txt?arm=sdk-cli&config=flags-account
- Monitor: https://changelogs.core-directive.com/prompts/2.1.243/tools/Monitor.txt?arm=sdk-cli&config=flags-account
- NotebookEdit: https://changelogs.core-directive.com/prompts/2.1.243/tools/NotebookEdit.txt?arm=sdk-cli&config=flags-account
- PushNotification: https://changelogs.core-directive.com/prompts/2.1.243/tools/PushNotification.txt?arm=sdk-cli&config=flags-account
- Read: https://changelogs.core-directive.com/prompts/2.1.243/tools/Read.txt?arm=sdk-cli&config=flags-account
- ReportFindings: https://changelogs.core-directive.com/prompts/2.1.243/tools/ReportFindings.txt?arm=sdk-cli&config=flags-account
- ScheduleWakeup: https://changelogs.core-directive.com/prompts/2.1.243/tools/ScheduleWakeup.txt?arm=sdk-cli&config=flags-account
- SendMessage: https://changelogs.core-directive.com/prompts/2.1.243/tools/SendMessage.txt?arm=sdk-cli&config=flags-account
- Skill: https://changelogs.core-directive.com/prompts/2.1.243/tools/Skill.txt?arm=sdk-cli&config=flags-account
- TaskCreate: https://changelogs.core-directive.com/prompts/2.1.243/tools/TaskCreate.txt?arm=sdk-cli&config=flags-account
- TaskGet: https://changelogs.core-directive.com/prompts/2.1.243/tools/TaskGet.txt?arm=sdk-cli&config=flags-account
- TaskList: https://changelogs.core-directive.com/prompts/2.1.243/tools/TaskList.txt?arm=sdk-cli&config=flags-account
- TaskOutput: https://changelogs.core-directive.com/prompts/2.1.243/tools/TaskOutput.txt?arm=sdk-cli&config=flags-account
- TaskStop: https://changelogs.core-directive.com/prompts/2.1.243/tools/TaskStop.txt?arm=sdk-cli&config=flags-account
- TaskUpdate: https://changelogs.core-directive.com/prompts/2.1.243/tools/TaskUpdate.txt?arm=sdk-cli&config=flags-account
- WebFetch: https://changelogs.core-directive.com/prompts/2.1.243/tools/WebFetch.txt?arm=sdk-cli&config=flags-account
- WebSearch: https://changelogs.core-directive.com/prompts/2.1.243/tools/WebSearch.txt?arm=sdk-cli&config=flags-account
- Workflow: https://changelogs.core-directive.com/prompts/2.1.243/tools/Workflow.txt?arm=sdk-cli&config=flags-account
- Write: https://changelogs.core-directive.com/prompts/2.1.243/tools/Write.txt?arm=sdk-cli&config=flags-account

## Full text
- system prompt: https://changelogs.core-directive.com/prompts/2.1.243/system.txt?arm=sdk-cli&config=flags-account