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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 v2.1.251 Feeds RSS JSON llms.txt
Reading a new release v2.1.251 Analysing changes · 2/5 Writing the entries · 2/4 steps 470 findings $18.91 so far

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

WebSearch tool description

10 model strings share this prompt, byte for byte.

v2.1.205 5 lines 309 chars sha256 5af98c7491c0 Plain text Whole capture

1Search the web. Returns result blocks with titles and URLs. US-only.
3- The current month is August 2026 — use this when searching for recent information.
4- `allowed_domains` / `blocked_domains` filter results.
5- After answering from results, end with a "Sources:" list of the URLs you used as markdown links.