v2.1.274 system prompt / Claude Code source intelligence

Claude Code, interactive mode Agent SDK, print mode Claude Code, interactive mode, seeded with flags-account Claude Code, interactive mode, seeded with flags-anon Agent SDK, print mode, seeded with flags-account Agent SDK, print mode, seeded with flags-anon

6 capture arms for this release, one page each, never diffed against each other

What changed since the previous capture

1 One line per document that moved, the system prompt and the tool descriptions in the same table.

PromptReachMovedThe first line that changed

SendMessage 33 ln all 27 arms +1−1 A listed peer is alive and will receive your message; messages enqueue and drain at the receiver's next tool round (its `ListAgents` row says whether...

The families in this capture

4 A family is one prompt and every model-interpolated copy of it, ranked by the model strings it reaches.

#FamilyHeadReachCopiesOpens with

1 Haiku family, 12 model strings 214 ln · 26.9k 17 of 27 3 copies You are an interactive agent that helps users with software engineering tasks.

2 claude-fable-5 74 ln · 9.6k 2 of 27 2 copies You are an interactive agent that helps users with software engineering tasks.

3 Opus family, 6 model strings 65 ln · 8.7k 6 of 27 1 copy You are an interactive agent that helps users with software engineering tasks.

4 default 51 ln · 5.3k 2 of 27 2 copies You are an interactive agent that helps users with software engineering tasks.

Tool descriptions

27 The text the model is given for each tool, on this arm.

All 27 tool descriptions →

ToolDescriptionCopiesMoved

Agent 1,668 chars 2 ○same

Bash 1,315 chars 2 ○same

CronCreate 2,595 chars 1 ○same

CronDelete 100 chars 1 ○same

CronList 60 chars 1 ○same

Edit 360 chars 2 ○same

EnterWorktree 3,220 chars 1 ○same

ExitWorktree 1,923 chars 1 ○same

ListAgents 777 chars 1 ○same

Monitor 6,354 chars 1 ○same

NotebookEdit 619 chars 1 ○same

PushNotification 1,362 chars 1 ○same

Read 790 chars 2 ○same

ReportFindings 574 chars 1 ○same

ScheduleWakeup 3,396 chars 1 ○same

SendMessage 4,259 chars 1 ◆moved

Skill 1,417 chars 1 ○same

TaskCreate 2,146 chars 1 ○same

TaskGet 732 chars 1 ○same

TaskList 998 chars 1 ○same

TaskOutput 1,049 chars 1 ○same

TaskStop 378 chars 1 ○same

TaskUpdate 2,243 chars 1 ○same

WebFetch 469 chars 2 ○same

WebSearch 312 chars 2 ○same

Workflow 3,480 chars 1 ○same

Write 240 chars 2 ○same

Read the whole system prompt →

v2.1.274, what moved

What changed since the previous capture

The families in this capture

Tool descriptions