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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.

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Claude Code v2.1.228

Gateway log lines escape control characters

Under the hood
Useful2 Signal2
Gateway

Gateway log lines escape control characters so request text cannot forge fake log entries.

What

Every [gateway] line written to stderr now passes through an escaper that converts newlines, carriage returns, tabs, C0 and C1 controls and line separators into \n, \r, \t or \uXXXX, so text coming from a request cannot forge extra log lines.

Evidence

lxH = { "\n": "\\n", "\r": "\\r", "\t": "\\t" };

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.228 →