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Oliver Kieselbach
b005c20598
Re-home agents to a new API base URL through the agent/config response (backend move or per-tenant EU->US region move) - the lesson from the 2026-07-18 WEU->GWC cutover, where the compiled-in API hostname hard-cut every in-flight agent (no DNS indirection possible: mTLS breaks behind a proxy, Flex custom-domain TLS is broken). Backend (ConfigVersion 33): - AdminConfiguration.AgentMigrateApiBaseUrl (global) + AgentMigrateTenantOverridesJson (tenantId->URL; empty value pins a tenant against the global target; override wins) - GetAgentConfigFunction.ResolveMigrateTarget serves the validated target; AgentMigrateServed / AgentMigrateRejected warnings as delivery evidence - TableConfigRepository Store+Map; admin portal Global Settings round-trip Agent (kill-switch-mirrored hardening): - Shared AgentEndpointMigrationRules: https-only, *.azurewebsites.net on a label boundary, no path/port/userinfo - enforced on BOTH sides - Live fetch only: RemoteConfigService cache strips the field on write AND read; EndpointMigration.ResolveTarget re-checks the fetch outcome - AgentRuntimeConfig.Resolve returns before merge/integrity/bootstrap cleanup on a pending migration (no spurious IntegrityCheckFailed against a stale migration stub), Program.RunAgent rebuilds Phase 3+4 against the new URL - single hop, kill signal wins before and after the hop Tests: AgentEndpointMigrationTests (backend rules + resolution), EndpointMigrationTests + cache-hardening strip (agent). Full suites green (Functions 2992, Agent Core 1822, vitest 557, tsc silent). Doc: docs/agent/endpoint-migration.md Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>