diff --git a/packages/cli/src/index.ts b/packages/cli/src/index.ts
index ed0db805c7..5140909cc2 100755
--- a/packages/cli/src/index.ts
+++ b/packages/cli/src/index.ts
@@ -1,10 +1,11 @@
 #!/usr/bin/env bun
 
 import { NodeRuntime, NodeServices } from "@effect/platform-node"
-import { Effect } from "effect"
+import { Effect, Layer } from "effect"
 import { Commands } from "./commands/commands"
 import { Runtime } from "./framework/runtime"
 import { Observability } from "@opencode-ai/util/observability"
+import { Client } from "@opencode-ai/util/client"
 import { Updater } from "./services/updater"
 import { InstallationChannel, InstallationVersion, InstallationLocal } from "@opencode-ai/util/installation/version"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
@@ -73,8 +74,7 @@ Effect.logInfo("cli starting", {
     Observability.layer({
       endpoint: process.env.OTEL_EXPORTER_OTLP_ENDPOINT,
       headers: process.env.OTEL_EXPORTER_OTLP_HEADERS,
-      client: process.env.OPENCODE_CLIENT ?? "cli",
-    }),
+    }).pipe(Layer.provide(Client.layer(process.env.OPENCODE_CLIENT))),
   ),
   Effect.provide(NodeServices.layer),
   Effect.scoped,
diff --git a/packages/core/src/models-dev.ts b/packages/core/src/models-dev.ts
index 15541cc307..3bc763882e 100644
--- a/packages/core/src/models-dev.ts
+++ b/packages/core/src/models-dev.ts
@@ -3,6 +3,7 @@ import { Context, Duration, Effect, Layer, Option, Schedule, Schema } from "effe
 import { HttpClient, HttpClientRequest } from "effect/unstable/http"
 import { ModelsDev } from "@opencode-ai/schema/models-dev"
 import { Money } from "@opencode-ai/schema/money"
+import { Client } from "@opencode-ai/util/client"
 import { Global } from "@opencode-ai/util/global"
 import { Flock } from "@opencode-ai/util/flock"
 import { Hash } from "@opencode-ai/util/hash"
@@ -531,17 +532,18 @@ export const Options = Schema.Struct({
   url: Schema.optional(Schema.String),
   file: Schema.optional(Schema.String),
   fetch: Schema.optional(Schema.Boolean),
-  client: Schema.optional(Schema.String),
 })
 export type Options = typeof Options.Type
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/ModelsDev") {}
 
-export const layer = (options?: Options) => Layer.effect(
+export const layer = (options?: Options) =>
+  Layer.effect(
   Service,
   Effect.gen(function* () {
     const fs = yield* FSUtil.Service
     const events = yield* EventV2.Service
+      const client = yield* Client.Name
     const http = HttpClient.filterStatusOk(
       (yield* HttpClient.HttpClient).pipe(
         HttpClient.retryTransient({
@@ -554,7 +556,7 @@ export const layer = (options?: Options) => Layer.effect(
 
     const source = options?.url || "https://models.dev"
     const fetch = options?.fetch ?? true
-    const userAgent = `opencode/${InstallationChannel}/${InstallationVersion}/${options?.client ?? "cli"}`
+      const userAgent = `opencode/${InstallationChannel}/${InstallationVersion}/${client}`
     const filepath = path.join(
       Global.Path.cache,
       source === "https://models.dev" ? "models.json" : `models-${Hash.fast(source)}.json`,
@@ -581,11 +583,7 @@ export const layer = (options?: Options) => Layer.effect(
     const loadFromDisk = fs.readJson(options?.file ?? filepath).pipe(
       Effect.map((input) => input as Record<string, SourceProvider>),
       Effect.catch((error) => {
-        if (
-          options?.file === undefined &&
-          error._tag === "FileSystemError" &&
-          error.method === "readJson"
-        ) {
+          if (options?.file === undefined && error._tag === "FileSystemError" && error.method === "readJson") {
           return fs.remove(filepath, { force: true }).pipe(Effect.ignore, Effect.as(undefined))
         }
         return Effect.succeed(undefined)
@@ -659,7 +657,11 @@ export const layer = (options?: Options) => Layer.effect(
 )
 
 export function configured(options?: Options) {
-  return makeGlobalNode({ service: Service, layer: layer(options), deps: [FSUtil.node, EventV2.node, httpClient] })
+  return makeGlobalNode({
+    service: Service,
+    layer: layer(options),
+    deps: [FSUtil.node, EventV2.node, Client.node, httpClient],
+  })
 }
 
 export const node = configured()
diff --git a/packages/core/src/session/compaction.ts b/packages/core/src/session/compaction.ts
index 8a897e350b..7a18f55f38 100644
--- a/packages/core/src/session/compaction.ts
+++ b/packages/core/src/session/compaction.ts
@@ -10,6 +10,7 @@ import { llmClient } from "../effect/app-node-platform"
 import { SessionEvent } from "./event"
 import type { SessionMessage } from "./message"
 import { SessionModelHeaders } from "./model-headers"
+import { Client } from "@opencode-ai/util/client"
 import { SessionRunnerModel } from "./runner/model"
 import { SessionSchema } from "./schema"
 import { toSessionError } from "./to-session-error"
@@ -60,7 +61,7 @@ type Settings = {
 }
 
 type Dependencies = {
-  readonly headers?: SessionModelHeaders.Options
+  readonly client: string
   readonly events: EventV2.Interface
   readonly llm: {
     readonly stream: (request: LLMRequest) => Stream.Stream<LLMEvent, LLMError>
@@ -259,7 +260,7 @@ const make = (dependencies: Dependencies) => {
       .stream(
         LLM.request({
           model: plan.model,
-          http: { headers: SessionModelHeaders.make(plan.session, dependencies.headers) },
+          http: { headers: SessionModelHeaders.make(plan.session, dependencies.client) },
           messages: [Message.user(plan.prompt)],
           tools: [],
         }),
@@ -391,23 +392,20 @@ const make = (dependencies: Dependencies) => {
   })
 }
 
-export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
+export const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const events = yield* EventV2.Service
     const llm = yield* LLMClient.Service
     const config = yield* Config.Service
     const models = yield* SessionRunnerModel.Service
-    return make({ events, llm, models, config: settings(yield* config.entries()), headers: options })
+    const client = yield* Client.Name
+    return make({ events, llm, models, config: settings(yield* config.entries()), client })
   }),
 )
 
-export function configured(options?: SessionModelHeaders.Options) {
-  return makeLocationNode({
-    service: Service,
-    layer: layer(options),
-    deps: [EventV2.node, llmClient, Config.node, SessionRunnerModel.node],
-  })
-}
-
-export const node = configured()
+export const node = makeLocationNode({
+  service: Service,
+  layer,
+  deps: [EventV2.node, llmClient, Config.node, SessionRunnerModel.node, Client.node],
+})
diff --git a/packages/core/src/session/generate-node.ts b/packages/core/src/session/generate-node.ts
index 4e3074640e..24be6f835c 100644
--- a/packages/core/src/session/generate-node.ts
+++ b/packages/core/src/session/generate-node.ts
@@ -4,6 +4,7 @@ import { LLM, LLMClient, Message, SystemPart } from "@opencode-ai/ai"
 import { Effect, Layer } from "effect"
 import { Database } from "../database/database"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
+import { Client } from "@opencode-ai/util/client"
 import { llmClient } from "../effect/app-node-platform"
 import { PluginHooks } from "../plugin/hooks"
 import { SessionContext } from "./context"
@@ -14,7 +15,7 @@ import { SessionRunnerModel } from "./runner/model"
 import PROMPT_DEFAULT from "./runner/prompt/base.txt"
 import { toLLMMessages } from "./runner/to-llm-message"
 
-export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
+export const layer = Layer.effect(
   SessionGenerate.Service,
   Effect.gen(function* () {
     const context = yield* SessionContext.Service
@@ -22,6 +23,7 @@ export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
     const hooks = yield* PluginHooks.Service
     const llm = yield* LLMClient.Service
     const models = yield* SessionRunnerModel.Service
+    const client = yield* Client.Name
 
     return SessionGenerate.Service.of({
       generate: Effect.fn("SessionGenerate.generate")(function* (input) {
@@ -49,7 +51,7 @@ export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
         return (yield* llm.generate(
           LLM.request({
             model: model.model,
-            http: { headers: SessionModelHeaders.make(selection.session, options) },
+            http: { headers: SessionModelHeaders.make(selection.session, client) },
             providerOptions: { openai: { promptCacheKey } },
             system: contextEvent.system,
             messages: contextEvent.messages,
@@ -62,12 +64,8 @@ export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
   }),
 )
 
-export function configured(options?: SessionModelHeaders.Options) {
-  return makeLocationNode({
-    service: SessionGenerate.Service,
-    layer: layer(options),
-    deps: [SessionContext.node, Database.node, PluginHooks.node, SessionRunnerModel.node, llmClient],
-  })
-}
-
-export const node = configured()
+export const node = makeLocationNode({
+  service: SessionGenerate.Service,
+  layer,
+  deps: [SessionContext.node, Database.node, PluginHooks.node, SessionRunnerModel.node, Client.node, llmClient],
+})
diff --git a/packages/core/src/session/model-headers.ts b/packages/core/src/session/model-headers.ts
index 5e9f75821c..cbe9d78f2b 100644
--- a/packages/core/src/session/model-headers.ts
+++ b/packages/core/src/session/model-headers.ts
@@ -2,22 +2,13 @@ export * as SessionModelHeaders from "./model-headers"
 
 import { InstallationVersion } from "@opencode-ai/util/installation/version"
 import { SessionSchema } from "./schema"
-import { Schema } from "effect"
 
-export const Options = Schema.Struct({
-  client: Schema.optional(Schema.String),
-})
-export type Options = typeof Options.Type
-
-export const make = (
-  session: Pick<SessionSchema.Info, "id" | "parentID" | "projectID">,
-  options?: Options,
-) => ({
+export const make = (session: Pick<SessionSchema.Info, "id" | "parentID" | "projectID">, client: string) => ({
   "x-session-affinity": session.id,
   "X-Session-Id": session.id,
   ...(session.parentID ? { "x-parent-session-id": session.parentID } : {}),
   "User-Agent": `opencode/${InstallationVersion}`,
   "x-opencode-project": session.projectID,
   "x-opencode-session": session.id,
-  "x-opencode-client": options?.client ?? "cli",
+  "x-opencode-client": client,
 })
diff --git a/packages/core/src/session/model-request.ts b/packages/core/src/session/model-request.ts
index 5b460433b8..73fef668e0 100644
--- a/packages/core/src/session/model-request.ts
+++ b/packages/core/src/session/model-request.ts
@@ -4,6 +4,7 @@ import { LLM, Message, SystemPart, type LLMRequest } from "@opencode-ai/ai"
 import { SessionError } from "@opencode-ai/schema/session-error"
 import { Context, Effect, Layer } from "effect"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
+import { Client } from "@opencode-ai/util/client"
 import { PluginHooks } from "../plugin/hooks"
 import { ToolRegistry } from "../tool/registry"
 import { SessionContext } from "./context"
@@ -39,11 +40,12 @@ export interface Interface {
 /** Location-scoped outbound model-request preparation. */
 export class Service extends Context.Service<Service, Interface>()("@opencode/v2/SessionModelRequest") {}
 
-export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
+export const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const hooks = yield* PluginHooks.Service
     const registry = yield* ToolRegistry.Service
+    const client = yield* Client.Name
 
     const prepare = Effect.fn("SessionModelRequest.prepare")(function* (input: PrepareInput) {
       const session = input.context.session
@@ -81,7 +83,7 @@ export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
       const request = LLM.request({
         model,
         http: {
-          headers: SessionModelHeaders.make(session, options),
+          headers: SessionModelHeaders.make(session, client),
         },
         providerOptions: { openai: { promptCacheKey } },
         system: contextEvent.system,
@@ -112,8 +114,8 @@ export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
   }),
 )
 
-export function configured(options?: SessionModelHeaders.Options) {
-  return makeLocationNode({ service: Service, layer: layer(options), deps: [PluginHooks.node, ToolRegistry.node] })
-}
-
-export const node = configured()
+export const node = makeLocationNode({
+  service: Service,
+  layer,
+  deps: [PluginHooks.node, ToolRegistry.node, Client.node],
+})
diff --git a/packages/core/src/session/title.ts b/packages/core/src/session/title.ts
index fd58a7c87d..a506cb1cc1 100644
--- a/packages/core/src/session/title.ts
+++ b/packages/core/src/session/title.ts
@@ -6,6 +6,7 @@ import { AgentV2 } from "../agent"
 import { Database } from "../database/database"
 import { EventV2 } from "../event"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
+import { Client } from "@opencode-ai/util/client"
 import { llmClient } from "../effect/app-node-platform"
 import { SessionEvent } from "./event"
 import { SessionHistory } from "./history"
@@ -17,7 +18,7 @@ import { SessionUsage } from "./usage"
 const MAX_LENGTH = 100
 
 type Dependencies = {
-  readonly headers?: SessionModelHeaders.Options
+  readonly client: string
   readonly events: EventV2.Interface
   readonly llm: {
     readonly stream: (request: LLMRequest) => Stream.Stream<LLMEvent, LLMError>
@@ -67,7 +68,7 @@ const make = (dependencies: Dependencies) => {
       .stream(
         LLM.request({
           model: resolved.model,
-          http: { headers: SessionModelHeaders.make(session, dependencies.headers) },
+          http: { headers: SessionModelHeaders.make(session, dependencies.client) },
           system: agent.system,
           messages: [Message.user(firstUser.text)],
           tools: [],
@@ -103,7 +104,7 @@ const make = (dependencies: Dependencies) => {
   return { generateForFirstPrompt }
 }
 
-export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
+export const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
     const events = yield* EventV2.Service
@@ -111,19 +112,16 @@ export const layer = (options?: SessionModelHeaders.Options) => Layer.effect(
     const agents = yield* AgentV2.Service
     const models = yield* SessionRunnerModel.Service
     const database = yield* Database.Service
-    const title = make({ events, llm, agents, models, headers: options })
+    const client = yield* Client.Name
+    const title = make({ events, llm, agents, models, client })
     return Service.of({
       generateForFirstPrompt: (session) => title.generateForFirstPrompt(database.db, session),
     })
   }),
 )
 
-export function configured(options?: SessionModelHeaders.Options) {
-  return makeLocationNode({
-    service: Service,
-    layer: layer(options),
-    deps: [EventV2.node, llmClient, AgentV2.node, SessionRunnerModel.node, Database.node],
-  })
-}
-
-export const node = configured()
+export const node = makeLocationNode({
+  service: Service,
+  layer,
+  deps: [EventV2.node, llmClient, AgentV2.node, SessionRunnerModel.node, Database.node, Client.node],
+})
diff --git a/packages/core/test/session-compact.test.ts b/packages/core/test/session-compact.test.ts
index 49b915abbe..479e0ec836 100644
--- a/packages/core/test/session-compact.test.ts
+++ b/packages/core/test/session-compact.test.ts
@@ -56,7 +56,7 @@ const locations = Layer.effect(
     () =>
       // The test only needs the compaction location service used by SessionV2.compact.
       // oxlint-disable-next-line typescript-eslint/no-unsafe-type-assertion
-      SessionCompaction.layer().pipe(
+      SessionCompaction.layer.pipe(
         Layer.provide(client),
         Layer.provide(config),
         Layer.provide(models),
diff --git a/packages/sdk-next/src/opencode.ts b/packages/sdk-next/src/opencode.ts
index bd6b9cc7c2..60adaec4bc 100644
--- a/packages/sdk-next/src/opencode.ts
+++ b/packages/sdk-next/src/opencode.ts
@@ -9,9 +9,11 @@ export const create = Effect.fn("OpenCode.create")(function* (options: ServerOpt
   const runtime = yield* Effect.acquireRelease(
     Effect.sync(() =>
       ManagedRuntime.make(
-        createEmbeddedRoutes({ ...options, database: { path: ":memory:", ...options.database } }).pipe(
-          Layer.provide(HttpServer.layerServices),
-        ),
+        createEmbeddedRoutes({
+          ...options,
+          client: options.client ?? "sdk",
+          database: { path: ":memory:", ...options.database },
+        }).pipe(Layer.provide(HttpServer.layerServices)),
       ),
     ),
     (runtime) => runtime.disposeEffect,
diff --git a/packages/server/src/routes.ts b/packages/server/src/routes.ts
index 4bf3a56a9b..f8985cc007 100644
--- a/packages/server/src/routes.ts
+++ b/packages/server/src/routes.ts
@@ -6,6 +6,7 @@ import { EventV2 } from "@opencode-ai/core/event"
 import { EventLogger } from "@opencode-ai/core/event-logger"
 import { FileSystemSearch } from "@opencode-ai/core/filesystem/search"
 import { Observability } from "@opencode-ai/util/observability"
+import { Client } from "@opencode-ai/util/client"
 import { Credential } from "@opencode-ai/core/credential"
 import { Config } from "@opencode-ai/core/config"
 import { CommandV2 } from "@opencode-ai/core/command"
@@ -87,7 +88,8 @@ function makeRoutes<AuthError, AuthServices>(
   const pluginRuntimeCell = PluginRuntime.makeCell()
   const replacements: LayerNode.Replacements = [
     [Database.node, Database.configured(options.database)],
-    [ModelsDev.node, ModelsDev.configured({ ...options.models, client: options.client })],
+    [Client.node, Client.configured(options.client)],
+    [ModelsDev.node, ModelsDev.configured(options.models)],
     [Watcher.node, Watcher.configured({ enabled: options.fs?.filewatcher })],
     [FileSystemSearch.node, FileSystemSearch.configured({ fff: options.fs?.fff })],
     [Global.node, Global.layerWith(options.config?.directory ? { config: options.config.directory } : {})],
@@ -103,10 +105,6 @@ function makeRoutes<AuthError, AuthServices>(
     [CommandV2.node, CommandV2.configured({ gitbash: options.windows?.gitbash })],
     [Pty.node, Pty.configured({ gitbash: options.windows?.gitbash })],
     [Shell.node, Shell.configured({ gitbash: options.windows?.gitbash })],
-    [SessionCompaction.node, SessionCompaction.configured({ client: options.client })],
-    [SessionGenerateNode.node, SessionGenerateNode.configured({ client: options.client })],
-    [SessionModelRequest.node, SessionModelRequest.configured({ client: options.client })],
-    [SessionTitle.node, SessionTitle.configured({ client: options.client })],
     [PluginRuntime.node, PluginRuntime.layerWithCell(pluginRuntimeCell)],
     [PluginRuntime.providerNode, PluginRuntime.providerNodeWithCell(pluginRuntimeCell)],
   ]
@@ -135,7 +133,7 @@ function makeRoutes<AuthError, AuthServices>(
         Layer.provide(authorizationLayer),
         Layer.provide(schemaErrorLayer),
         Layer.provide(auth),
-        Layer.provide(Observability.layer({ ...options.observability, client: options.client })),
+        Layer.provide(Observability.layer(options.observability).pipe(Layer.provide(Client.layer(options.client)))),
         HttpRouter.provideRequest(requestServices),
         Layer.provideMerge(services),
         Layer.provideMerge(HttpRouter.layer),
diff --git a/packages/util/src/client.ts b/packages/util/src/client.ts
new file mode 100644
index 0000000000..8375e23616
--- /dev/null
+++ b/packages/util/src/client.ts
@@ -0,0 +1,14 @@
+export * as Client from "./client.js"
+
+import { Context, Layer } from "effect"
+import { makeGlobalNode } from "./effect/app-node.js"
+
+export const Name = Context.Reference<string>("@opencode/Client/Name", {
+  defaultValue: () => "cli",
+})
+
+export const layer = (name = "cli") => Layer.succeed(Name, name)
+
+export const configured = (name?: string) => makeGlobalNode({ service: Name, layer: layer(name), deps: [] })
+
+export const node = configured()
diff --git a/packages/util/src/observability.ts b/packages/util/src/observability.ts
index ecc2363e40..f356aa03fb 100644
--- a/packages/util/src/observability.ts
+++ b/packages/util/src/observability.ts
@@ -7,11 +7,11 @@ import { FetchHttpClient } from "effect/unstable/http"
 import { OtlpSerialization } from "effect/unstable/observability"
 import { Logging } from "./observability/logging.js"
 import { Otlp } from "./observability/otlp.js"
+import { Client } from "./client.js"
 
 export const Options = Schema.Struct({
   endpoint: Schema.optional(Schema.String),
   headers: Schema.optional(Schema.String),
-  client: Schema.optional(Schema.String),
 })
 export type Options = typeof Options.Type
 
@@ -19,7 +19,6 @@ export function layer(
   options: Options = {
     endpoint: process.env.OTEL_EXPORTER_OTLP_ENDPOINT,
     headers: process.env.OTEL_EXPORTER_OTLP_HEADERS,
-    client: process.env.OPENCODE_CLIENT ?? "cli",
   },
 ) {
   const local = Logger.layer(Logging.loggers(), { mergeWithExisting: false }).pipe(
@@ -29,14 +28,17 @@ export function layer(
   )
   return Layer.unwrap(
     Effect.gen(function* () {
-      const logs = Logger.layer([...Logging.loggers(), ...Otlp.loggers(options)], { mergeWithExisting: false }).pipe(
+      const client = yield* Client.Name
+      const logs = Logger.layer([...Logging.loggers(), ...Otlp.loggers(options, client)], {
+        mergeWithExisting: false,
+      }).pipe(
         Layer.provide(NodeFileSystem.layer),
         Layer.provide(OtlpSerialization.layerJson),
         Layer.provide(FetchHttpClient.layer),
         Layer.orDie,
         Layer.merge(Layer.succeed(References.MinimumLogLevel, Logging.minimumLogLevel())),
       )
-      return Layer.merge(logs, yield* Effect.promise(() => Otlp.tracingLayer(options)))
+      return Layer.merge(logs, yield* Effect.promise(() => Otlp.tracingLayer(options, client)))
     }),
   ).pipe(Layer.catchCause(() => local))
 }
diff --git a/packages/util/src/observability/otlp.ts b/packages/util/src/observability/otlp.ts
index eb6771e54c..9ac4b7ce6d 100644
--- a/packages/util/src/observability/otlp.ts
+++ b/packages/util/src/observability/otlp.ts
@@ -6,19 +6,18 @@ import { runID } from "./shared.js"
 export interface Options {
   readonly endpoint?: string
   readonly headers?: string
-  readonly client?: string
 }
 
 function parseHeaders(value?: string) {
   return value
     ? value.split(",").reduce(
-      (acc, entry) => {
-        const [key, ...value] = entry.split("=")
-        acc[key] = value.join("=")
-        return acc
-      },
-      {} as Record<string, string>,
-    )
+        (acc, entry) => {
+          const [key, ...value] = entry.split("=")
+          acc[key] = value.join("=")
+          return acc
+        },
+        {} as Record<string, string>,
+      )
     : undefined
 }
 
@@ -38,7 +37,11 @@ function resourceAttributes() {
   }
 }
 
-export function resource(client = "cli"): { serviceName: string; serviceVersion: string; attributes: Record<string, string> } {
+export function resource(client = "cli"): {
+  serviceName: string
+  serviceVersion: string
+  attributes: Record<string, string>
+} {
   return {
     serviceName: "opencode",
     serviceVersion: InstallationVersion,
@@ -52,18 +55,18 @@ export function resource(client = "cli"): { serviceName: string; serviceVersion:
   }
 }
 
-export function loggers(options?: Options) {
+export function loggers(options: Options | undefined, client: string) {
   if (!options?.endpoint) return []
   return [
     OtlpLogger.make({
       url: `${options.endpoint}/v1/logs`,
-      resource: resource(options.client),
+      resource: resource(client),
       headers: parseHeaders(options.headers),
     }),
   ]
 }
 
-export async function tracingLayer(options?: Options) {
+export async function tracingLayer(options: Options | undefined, client: string) {
   if (!options?.endpoint) return Layer.empty
   const NodeSdk = await import("@effect/opentelemetry/NodeSdk")
   const OTLP = await import("@opentelemetry/exporter-trace-otlp-http")
@@ -77,7 +80,7 @@ export async function tracingLayer(options?: Options) {
   context.setGlobalContextManager(manager)
 
   return NodeSdk.layer(() => ({
-    resource: resource(options.client),
+    resource: resource(client),
     spanProcessor: new SdkBase.BatchSpanProcessor(
       new OTLP.OTLPTraceExporter({
         url: `${options.endpoint}/v1/traces`,