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Sweep 28 Aug 2026 ยท 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.

One change

Gateway protocol reference

llm-gateway-protocol

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llm-gateway-protocol Changed · +0 / -2 lines

from line 98
 * Keep the block in its own array entry: the endpoint treats a merged block that starts with the attribution header as attribution in its entirety and drops everything merged into it, including the rest of the system prompt.
 * If your gateway must reshape system content, set [`CLAUDE_CODE_ATTRIBUTION_HEADER=0`](/docs/en/env-vars) so Claude Code omits the block. Anthropic and the cloud providers' Claude endpoints read the block for attribution, so omit it at the client rather than stripping or moving it in the gateway.
 
-Requests that reach the endpoint unmodified are unaffected.
-
 The variable exists for gateway and third-party caching compatibility, not as a privacy control: on a direct connection the full request already goes to the Anthropic API either way. When both of these hold, Claude Code keeps the block on [auto mode](/docs/en/permission-modes#eliminate-prompts-with-auto-mode) classifier requests even when you set the variable to `0`:
 
 * The requests go to `api.anthropic.com`, with `ANTHROPIC_BASE_URL` unset or naming that host and no third-party provider selected.