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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

API key verification is now a shared store with a generation counter

Under the hood
Useful2 Signal1
Auth

API key verification is shared and a slow check can no longer overwrite a newer result.

What

Key verification moved from a per-component hook to a single shared object, with a counter so a slow verification cannot overwrite a newer result. Telemetry is unchanged, still reporting helper failure, missing, invalid and network error outcomes.

Evidence

apikeyhelper_failed

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 →