fix(sdk): set app identity explicitly

packages/sdk/src/internal/host.ts

@@ -11,6 +11,7 @@ import type { LayerNode } from "@opencode/util/effect/layer-node"
 import { Context, Effect, Layer, ManagedRuntime, Scope } from "effect"
 import { HttpEffect, HttpRouter, HttpServer, HttpServerRequest } from "effect/unstable/http"
 import { context, layer, type LogOptions } from "../logging"
+import pkg from "../../package.json"
 import { OwnedFetch } from "./fetch"
 import { SdkInstances } from "./instances"
 
@@ -35,7 +36,11 @@ export const create = Effect.fn("EmbeddedHost.create")(function* <R = never>(
     createEmbeddedRoutes(
       {
         ...server,
-        app: { ...server.app, name: server.app?.name ?? "sdk" },
+        app: {
+          name: server.app?.name ?? "sdk",
+          version: server.app?.version ?? pkg.version,
+          channel: server.app?.channel ?? "latest",
+        },
         database: { path: ":memory:", ...server.database },
       },
       workspaceProviders

packages/sdk/test/embedded.test.ts

@@ -12,6 +12,7 @@ import { Deferred, Effect, Fiber, Latch, Layer, Option, Schedule, Stream } from
 import { testEffect } from "../../core/test/lib/effect"
 import { tmpdir } from "../../core/test/fixture/tmpdir"
 import type { OpenCodeEvent } from "../src/effect"
+import pkg from "../package.json"
 
 const it = testEffect(Layer.empty)
 type Sdk = typeof import("../src/effect")
@@ -89,6 +90,21 @@ for (const selection of ["explicit", "default"] as const) {
         const requests = yield* llm.requests()
         expect(requests).toHaveLength(1)
         expect(requests[0]?.model).toMatchObject({ provider: "custom", id: "fictional-chat" })
+
+        const session = yield* opencode.sessions.create({ location: location(fixture) })
+        yield* opencode.sessions.switchModel({
+          sessionID: session.id,
+          model: fixture.sdk.Model.Ref.make({
+            providerID: fixture.sdk.Provider.ID.make("custom"),
+            id: fixture.sdk.Model.ID.make("fictional-chat"),
+          }),
+        })
+        yield* opencode.sessions.prompt({ sessionID: session.id, text: "Say ready" })
+        yield* llm.wait(2)
+        yield* opencode.sessions.interrupt({ sessionID: session.id })
+        expect((yield* llm.requests())[1]?.http?.headers?.["User-Agent"]).toBe(
+          `opencode/latest/${pkg.version}/sdk`,
+        )
       }),
     ),
   )