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Sweep 01 Oct 2026 · 17:27Z Build v2.1.287 508 read Stable v2.1.285 Latest v2.1.287 Next v2.1.287 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.286 ·

A settings request to Anthropic now says it comes from Claude Code

One request Claude Code makes to Anthropic's API now includes a User-Agent header naming the program that sent it

Under the hood Internal Changes
JSON All of v2.1.286
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
3Signal: worth watching, 1 to 5
API RequestsArea: what it touches
Internal ChangesKind: in v2.1.286,
Internal ChangesSection of the release
What

Claude Code makes a request to /api/claude_code_penguin_mode on Anthropic's API. That request now includes a User-Agent header, a line that names the program making the request. It previously carried only the login and API headers.

Why

This is a small change, but anything that inspects Claude Code's outgoing traffic, such as a corporate proxy, will now see this request identified.

See this entry in the whole of v2.1.286 →

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