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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

v2.1.128 system prompt

1 of 24 tool descriptions changed. Compared against v2.1.126.

Claude Code, interactive mode 27 model strings 24 tools released captured Markdown

Read +1 −0 of 15 lines

This edit reached all 27 arms

from line 12 
 - This tool can only read files, not directories. To list files in a directory, use the registered shell tool.
 - You will regularly be asked to read screenshots. If the user provides a path to a screenshot, ALWAYS use this tool to view the file at the path. This tool will work with all temporary file paths.
 - If you read a file that exists but has empty contents you will receive a system reminder warning in place of file contents.
+- Do NOT re-read a file you just edited to verify — Edit/Write would have errored if the change failed, and the harness tracks file state for you.

The full text

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

Read the whole system prompt → All 24 tool descriptions →