Move cloud feature flags to MCP session

Author: RhysSullivan

apps/cloud/src/api/core-shared-services.ts

@@ -15,16 +15,11 @@ import { Layer } from "effect";
 
 import { WorkOSAuth } from "../auth/workos";
 import { AutumnService } from "../services/autumn";
-import { PostHogFeatureFlags } from "../services/feature-flags";
 
 /**
  * Services that are independent of how the DB or tracer is provisioned —
  * both the stateless HTTP path (per-request DB via Hyperdrive) and the MCP
  * session DO (long-lived DB + isolate-local tracer SDK) merge this with
  * their own `DbLive` + `UserStoreLive` + telemetry layer.
  */
-export const CoreSharedServices = Layer.mergeAll(
-  WorkOSAuth.Default,
-  AutumnService.Default,
-  PostHogFeatureFlags,
-);
+export const CoreSharedServices = Layer.mergeAll(WorkOSAuth.Default, AutumnService.Default);

apps/cloud/src/mcp-session.ts

@@ -31,6 +31,7 @@ import { UserStoreService } from "./auth/context";
 import { resolveOrganization } from "./auth/resolve-organization";
 import { DbService, combinedSchema, resolveConnectionString } from "./services/db";
 import { makeExecutionStack } from "./services/execution-stack";
+import { PostHogFeatureFlags } from "./services/feature-flags";
 import { makeMcpWorkerTransport, type McpWorkerTransport } from "./services/mcp-worker-transport";
 import { DoTelemetryLive } from "./services/telemetry";
 import { captureCause } from "./observability";
@@ -230,7 +231,8 @@ const makeResolveOrganizationServices = (dbHandle: DbHandle) => {
 // child span from the outer `McpSessionDO.init` / `McpSessionDO.handleRequest`
 // trace. Tracer comes from the outermost `Effect.provide(DoTelemetryLive)`
 // at the DO method boundary.
-const makeSessionServices = (dbHandle: DbHandle) => makeResolveOrganizationServices(dbHandle);
+const makeSessionServices = (dbHandle: DbHandle) =>
+  Layer.mergeAll(makeResolveOrganizationServices(dbHandle), PostHogFeatureFlags);
 
 const resolveSessionMeta = Effect.fn("McpSessionDO.resolveSessionMeta")(function* (
   organizationId: string,