Source Intelligence
Sweep 28 Aug 2026 · 00:00Z Build v2.1.250 478 read Stable v2.1.236 Latest v2.1.250 Next v2.1.250 Feeds RSS JSON llms.txt

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

Prompt capture

v2.1.199 system prompt

1 of 24 tool descriptions changed. Compared against v2.1.198.

Agent SDK, print mode 27 model strings 24 tools released captured Markdown

SendMessage +1 −1 of 14 lines

This edit reached all 27 arms

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 resume a completed background agent, use the `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 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.

The full text

The whole documents, one page each, exactly as they were sent.