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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 v2.1.248

Truncated prompts say so inline

You'll notice
Useful3 Signal2
Agents

An over-limit prompt now shows a truncation banner with the size instead of quietly shortening.

What

A prompt that exceeds the size limit now carries a banner reading "[prompt truncated: exceeded ..." with the size in KB filled in at runtime, so you can tell truncation happened rather than seeing silently shortened input.

Evidence

[prompt truncated: exceeded

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 v2.1.248 →