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fix(amazon-bedrock): extract region from inference profile ARNs

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Application inference profile ARNs encode the region
(arn:aws:bedrock:<region>:<account>:...) but the provider ignored it,
falling through to AWS_REGION which may point to a different region.
Extract the region from the ARN when present, taking priority over
environment variables.

Fixes #4860
This commit is contained in:
ajm_ensighten
2026-06-08 17:01:51 -05:00
parent 20b78eafb4
commit 8cef3c8d7f
2 changed files with 33 additions and 4 deletions
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11
packages/ai/src/providers/amazon-bedrock.ts
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@@ -143,10 +143,13 @@ export const streamBedrock: StreamFunction<"bedrock-converse-stream", BedrockOpt
// in Node.js/Bun environment only
if (typeof process !== "undefined" && (process.versions?.node || process.versions?.bun)) {
// Region resolution: explicit option > env vars > SDK default chain.
// When AWS_PROFILE is set, we leave region undefined so the SDK can
// resovle it from aws profile configs. Otherwise fall back to us-east-1.
if (configuredRegion) {
// Region resolution: ARN-embedded > explicit option > env vars > SDK default chain.
// When the model ID is an inference profile ARN, extract the region from it.
// This avoids conflicts with AWS_REGION set for other services.
const arnRegionMatch = model.id.match(/^arn:aws(?:-[a-z0-9-]+)?:bedrock:([a-z0-9-]+):/);
if (arnRegionMatch) {
config.region = arnRegionMatch[1];
} else if (configuredRegion) {
config.region = configuredRegion;
} else if (endpointRegion && useExplicitEndpoint) {
config.region = endpointRegion;