Source Intelligence

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.

All of v2.1.224 Home All releases olderv2.1.223 v2.1.225newer

Two warnings when a Bedrock region prefix cannot be confirmed

You'll notice
Useful3 Signal2
Bedrock

Bedrock now warns when it can't confirm a region prefix, or when models resolve elsewhere.

ANTHROPIC_BEDROCK_REGION_PREFIX
What

If inference-profile discovery is unavailable, setting a region prefix now warns that it is being applied without an availability check. If discovery works but some models resolve to a different region, a second warning names how many and states that the prefix is a preference, not a residency guarantee.

Details
  • Warning text is assembled at runtime around the fixed fragment "is being applied without an availability check (inference-profile discovery is unavailable)."
  • Both warnings only appear when ANTHROPIC_BEDROCK_REGION_PREFIX is set.
Evidence

This is a preference, not a residency guarantee.

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 v2.1.224 →