# Claude Code v2.1.257: system prompt

> 1 of 14 tool descriptions changed. Compared against v2.1.252.

Web version: https://changelogs.core-directive.com/prompts/2.1.257?surface=subagent-explore

## What this version holds
- model strings captured: 1
- tool descriptions: 14
- compared against: v2.1.252
- system prompt edits: 0
- widest system prompt edit: +0/-0 lines
- tool descriptions changed: 1

## What moved

### Tool: WebSearch (+1/-1 lines)

This edit reached all 1 arms.

```diff
@@ from line 1 @@
 Search the web. Returns result blocks with titles and URLs. US-only.
 
-- The current month is August 2026 — use this when searching for recent information.
+- The current month is September 2026 — use this when searching for recent information.
 - `allowed_domains` / `blocked_domains` filter results.
 - After answering from results, end with a "Sources:" list of the URLs you used as markdown links.
```

## Tool descriptions
- Bash: https://changelogs.core-directive.com/prompts/2.1.257/tools/Bash.txt?surface=subagent-explore
- CronCreate: https://changelogs.core-directive.com/prompts/2.1.257/tools/CronCreate.txt?surface=subagent-explore
- CronDelete: https://changelogs.core-directive.com/prompts/2.1.257/tools/CronDelete.txt?surface=subagent-explore
- CronList: https://changelogs.core-directive.com/prompts/2.1.257/tools/CronList.txt?surface=subagent-explore
- EnterWorktree: https://changelogs.core-directive.com/prompts/2.1.257/tools/EnterWorktree.txt?surface=subagent-explore
- ExitWorktree: https://changelogs.core-directive.com/prompts/2.1.257/tools/ExitWorktree.txt?surface=subagent-explore
- ListAgents: https://changelogs.core-directive.com/prompts/2.1.257/tools/ListAgents.txt?surface=subagent-explore
- Read: https://changelogs.core-directive.com/prompts/2.1.257/tools/Read.txt?surface=subagent-explore
- ReportFindings: https://changelogs.core-directive.com/prompts/2.1.257/tools/ReportFindings.txt?surface=subagent-explore
- SendMessage: https://changelogs.core-directive.com/prompts/2.1.257/tools/SendMessage.txt?surface=subagent-explore
- Skill: https://changelogs.core-directive.com/prompts/2.1.257/tools/Skill.txt?surface=subagent-explore
- TaskStop: https://changelogs.core-directive.com/prompts/2.1.257/tools/TaskStop.txt?surface=subagent-explore
- WebFetch: https://changelogs.core-directive.com/prompts/2.1.257/tools/WebFetch.txt?surface=subagent-explore
- WebSearch (changed in this version): https://changelogs.core-directive.com/prompts/2.1.257/tools/WebSearch.txt?surface=subagent-explore

## Full text
- system prompt: https://changelogs.core-directive.com/prompts/2.1.257/system.txt?surface=subagent-explore