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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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Claude Code v2.1.224 ·

Two warnings when a Bedrock region prefix cannot be confirmed

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

You'll notice New Features
JSON All of v2.1.224
You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
BedrockArea: what it touches
New FeaturesKind: in v2.1.224,
New FeaturesSection of the release
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.

Read from
Names in the bundleANTHROPIC_BEDROCK_REGION_PREFIX
How sure we are
Two sources agreeTwo things we can check say the same as this entry.
Anthropic's release notes agreeAdded ANTHROPIC_BEDROCK_REGION_PREFIX env var for Bedrock to prefer a specific cross-region inference profile over the AWS_REGION-derived…
The name it cites is new in this buildNew in this build: ANTHROPIC_BEDROCK_REGION_PREFIX

See this entry in the whole of v2.1.224 →

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