feat(observability): refine span linkage and telemetry

packages/server/test/observability.test.ts

@@ -0,0 +1,32 @@
+import { expect, test } from "bun:test"
+import { NodeServices } from "@effect/platform-node"
+import { Context, Effect, Layer, References } from "effect"
+import { HttpMiddleware, HttpServer, HttpServerRequest } from "effect/unstable/http"
+
+test("route construction retains the server tracing policy", async () => {
+  const database = process.env.OPENCODE_DB
+  const endpoint = process.env.OTEL_EXPORTER_OTLP_ENDPOINT
+  delete process.env.OTEL_EXPORTER_OTLP_ENDPOINT
+  process.env.OPENCODE_DB = ":memory:"
+
+  try {
+    const { createEmbeddedRoutes } = await import("../src/routes")
+    await Effect.gen(function* () {
+      const context = yield* Layer.build(
+        createEmbeddedRoutes().pipe(
+          Layer.provide(HttpServer.layerServices),
+          Layer.provide(NodeServices.layer),
+        ),
+      )
+      const request = HttpServerRequest.fromWeb(new Request("http://opencode.local/api/session"))
+
+      expect(Context.get(context, References.TracerEnabled)).toBeFalse()
+      expect(Context.get(context, HttpMiddleware.TracerDisabledWhen)(request)).toBeTrue()
+    }).pipe(Effect.scoped, Effect.runPromise)
+  } finally {
+    if (database === undefined) delete process.env.OPENCODE_DB
+    else process.env.OPENCODE_DB = database
+    if (endpoint === undefined) delete process.env.OTEL_EXPORTER_OTLP_ENDPOINT
+    else process.env.OTEL_EXPORTER_OTLP_ENDPOINT = endpoint
+  }
+})