# Claude Code v2.1.203: system prompt > 2 of 27 tool descriptions changed. The appended system-reminder blocks moved: 3 lines added, 1 line removed. Compared against v2.1.202. Web version: https://changelogs.core-directive.com/prompts/2.1.203?arm=cli ## What this version holds - model strings captured: 27 - tool descriptions: 27 - compared against: v2.1.202 - system prompt edits: 0 - widest system prompt edit: +0/-0 lines - tool descriptions changed: 2 ## What moved ### Tool: EnterWorktree (+2/-2 lines) This edit reached all 27 arms. ```diff @@ from line 25 @@ ## Entering an existing worktree -Pass `path` instead of `name` to switch the session into a worktree that already exists (e.g., one you just created with `git worktree add`). The path must appear in `git worktree list` for the current repository — paths that are not registered worktrees of this repo are rejected. ExitWorktree will not remove a worktree entered this way; use `action: "keep"` to return to the original directory. +Pass `path` instead of `name` to switch the session into a worktree that already exists (e.g., one you just created with `git worktree add`). On first entry from the launch directory, the path must appear in `git worktree list` for the repository that owns it — the current repository or, in a multi-repo workspace, a repository nested inside it; paths registered by neither are rejected. ExitWorktree will not remove a worktree entered this way; use `action: "keep"` to return to the original directory. Switching with `path` also works when the session is already in a worktree (the previous worktree is left on disk, untouched, and only the new one is tracked for exit-time cleanup), and from agents whose working directory was pinned at launch (subagent isolation or explicit cwd). In both cases the target must be a worktree under `.claude/worktrees/` of the same repository, and from a pinned agent the switch only affects this agent, not the parent session. After a further switch, previously-visited worktrees are no longer writable — re-issue EnterWorktree with `path` to return to one. ``` ```diff @@ from line 32 @@ ## Parameters - `name` (optional): A name for a new worktree. If neither `name` nor `path` is provided, a random name is generated. -- `path` (optional): Path to an existing worktree of the current repository to enter instead of creating one. Mutually exclusive with `name`. +- `path` (optional): Path to an existing worktree to enter instead of creating one — of the current repository, or (on first entry from the launch directory) of a repository nested inside it. Mutually exclusive with `name`. ``` ### Tool: SendMessage (+1/-1 lines) This edit reached all 27 arms. ```diff @@ from line 11 @@ | `"researcher"` | Teammate by name | | `"main"` | The main conversation (background subagents only) | -Your plain text output is NOT visible to other agents — to communicate, you MUST call this tool. Messages from teammates are delivered automatically; you don't check an inbox. Refer to active teammates by name; to address a background agent that has no name (or whose name a teammate holds) — or to resume a completed one — use its `agentId` (format `a...-...`) from its spawn result. When relaying, don't quote the original — it's already rendered to the user. +Your plain text output is NOT visible to other agents — to communicate, you MUST call this tool. Messages from teammates are delivered automatically; you don't check an inbox. Refer to agents by name — names keep working after an agent completes (a send resumes it from its transcript). Use the raw `agentId` (format `a...-...`) from its spawn result only when the agent has no name, or when a newer agent took the name (latest wins). When relaying, don't quote the original — it's already rendered to the user. ``` ## Tool descriptions - Agent: https://changelogs.core-directive.com/prompts/2.1.203/tools/Agent.txt?arm=cli - AskUserQuestion: https://changelogs.core-directive.com/prompts/2.1.203/tools/AskUserQuestion.txt?arm=cli - Bash: https://changelogs.core-directive.com/prompts/2.1.203/tools/Bash.txt?arm=cli - CronCreate: https://changelogs.core-directive.com/prompts/2.1.203/tools/CronCreate.txt?arm=cli - CronDelete: https://changelogs.core-directive.com/prompts/2.1.203/tools/CronDelete.txt?arm=cli - CronList: https://changelogs.core-directive.com/prompts/2.1.203/tools/CronList.txt?arm=cli - Edit: https://changelogs.core-directive.com/prompts/2.1.203/tools/Edit.txt?arm=cli - EnterPlanMode: https://changelogs.core-directive.com/prompts/2.1.203/tools/EnterPlanMode.txt?arm=cli - EnterWorktree (changed in this version): https://changelogs.core-directive.com/prompts/2.1.203/tools/EnterWorktree.txt?arm=cli - ExitPlanMode: https://changelogs.core-directive.com/prompts/2.1.203/tools/ExitPlanMode.txt?arm=cli - ExitWorktree: https://changelogs.core-directive.com/prompts/2.1.203/tools/ExitWorktree.txt?arm=cli - NotebookEdit: https://changelogs.core-directive.com/prompts/2.1.203/tools/NotebookEdit.txt?arm=cli - Read: https://changelogs.core-directive.com/prompts/2.1.203/tools/Read.txt?arm=cli - ReportFindings: https://changelogs.core-directive.com/prompts/2.1.203/tools/ReportFindings.txt?arm=cli - ScheduleWakeup: https://changelogs.core-directive.com/prompts/2.1.203/tools/ScheduleWakeup.txt?arm=cli - SendMessage (changed in this version): https://changelogs.core-directive.com/prompts/2.1.203/tools/SendMessage.txt?arm=cli - Skill: https://changelogs.core-directive.com/prompts/2.1.203/tools/Skill.txt?arm=cli - TaskCreate: https://changelogs.core-directive.com/prompts/2.1.203/tools/TaskCreate.txt?arm=cli - TaskGet: https://changelogs.core-directive.com/prompts/2.1.203/tools/TaskGet.txt?arm=cli - TaskList: https://changelogs.core-directive.com/prompts/2.1.203/tools/TaskList.txt?arm=cli - TaskOutput: https://changelogs.core-directive.com/prompts/2.1.203/tools/TaskOutput.txt?arm=cli - TaskStop: https://changelogs.core-directive.com/prompts/2.1.203/tools/TaskStop.txt?arm=cli - TaskUpdate: https://changelogs.core-directive.com/prompts/2.1.203/tools/TaskUpdate.txt?arm=cli - WebFetch: https://changelogs.core-directive.com/prompts/2.1.203/tools/WebFetch.txt?arm=cli - WebSearch: https://changelogs.core-directive.com/prompts/2.1.203/tools/WebSearch.txt?arm=cli - Workflow: https://changelogs.core-directive.com/prompts/2.1.203/tools/Workflow.txt?arm=cli - Write: https://changelogs.core-directive.com/prompts/2.1.203/tools/Write.txt?arm=cli ## Full text - system prompt: https://changelogs.core-directive.com/prompts/2.1.203/system.txt?arm=cli