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f2370991ec
Enterprise AWS IAM Identity Center accounts whose IdC instance lives outside the two Amazon Q Developer profile regions (us-east-1 / eu-central-1) - e.g. eu-north-1 (Stockholm), start URL https://d-XXXX.awsapps.com/start - showed no limits and returned 502 on every request. Root cause: the backend used the IdC/OIDC token region (providerSpecificData.region, e.g. eu-north-1) for every CodeWhisperer runtime call, hitting q.eu-north-1.amazonaws.com - a host that does not exist as a Q Developer runtime endpoint. Per AWS docs ("Supported Regions for the Q Developer console and Q Developer profile"), the Q Developer *profile* (which produces the profileArn and hosts generateAssistantResponse / GetUsageLimits / ListAvailableModels / ListAvailableProfiles) is only hosted in us-east-1 and eu-central-1, regardless of the IdC region; "data is stored in the Region where you create the Amazon Q Developer profile." Fix (new open-sse/services/kiroRegion.ts) decouples the two regions: - providerSpecificData.region stays the IdC/OIDC region, used ONLY for oidc.{region}.amazonaws.com token mint/refresh. - The runtime region is derived from the profileArn (resolveKiroRuntimeRegion): profileArn region -> a valid stored profile region -> us-east-1. A stored IdC region that is not a Q profile region (eu-north-1) is ignored for runtime. - Profile discovery (discoverKiroProfileArnAcrossRegions) probes the Q profile regions (EU IdC -> eu-central-1 first) with the cross-region SSO token instead of q.{idcRegion}. Wired into: executors/kiro.ts (generateAssistantResponse targets the profile region), services/usage/kiro.ts (getKiroUsage multi-region discovery + profileArn runtime region so Limits resolves), services/kiroModels.ts (ListAvailableModels), and src/lib/oauth/providers/kiro.ts (login-time postExchange profile discovery). Adds tests/unit/kiro-idc-cross-region.test.ts (15 cases). All Kiro suites pass (60 tests).