Source Intelligence

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.

All of v2.1.169 Home All releases olderv2.1.168 v2.1.170newer

SendFile Tool Rejects URLs with a Clear Error

What

When the SendFile (file-delivery) tool receives a path that looks like a URL (https://..., ftp://..., etc.), it now returns an actionable error message instead of silently failing or producing a confusing "file not found" error.

Details
  • New error text: "looks like a URL, not a local file path. This tool can only send files that exist on the local filesystem — download or write the content to a local file first, then pass that path."
  • The tool description is also updated to clarify: "Files must already exist on the local filesystem — the tool sends files, it doesn't fetch URLs or render content."
Evidence

Validation logic (search for "looks like a URL, not a local file path") — file path validator at line ~28934

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.169 →