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
v2.1.243 system prompt
No change to the system prompt since v2.1.242.
Agent SDK, print mode27 model strings24 toolsreleased captured Markdown
Nothing in the system prompt or in any of the 24 tool descriptions moved between v2.1.242 and v2.1.243.
The full text
The whole documents, one page each, exactly as they were sent.
