diff --git a/packages/core/src/session/runner/llm.ts b/packages/core/src/session/runner/llm.ts
index d18351b53e..6a15137c07 100644
--- a/packages/core/src/session/runner/llm.ts
+++ b/packages/core/src/session/runner/llm.ts
@@ -51,6 +51,7 @@ import { AgentNotFoundError, StepFailedError } from "../error"
 import { toSessionError } from "../to-session-error"
 import { SessionRunnerRetry } from "./retry"
 import { PluginSupervisor } from "../../plugin/supervisor"
+import { Flag } from "../../flag/flag"
 
 type StepTokens = {
   readonly input: number
@@ -197,6 +198,13 @@ const layer = Layer.effect(
       const promptCacheKey = /^ses_[0-9a-f]{64}$/.test(session.id) ? session.id.slice(4) : session.id
       const request = LLM.request({
         model,
+        http: {
+          headers: {
+            "x-opencode-project": session.projectID,
+            "x-opencode-session": session.id,
+            "x-opencode-client": Flag.OPENCODE_CLIENT,
+          },
+        },
         providerOptions: { openai: { promptCacheKey } },
         system: [agentInfo.system ? agentInfo.system : SessionRunnerSystemPrompt.provider(model), history.initial]
           .filter((part): part is string => part !== undefined && part.length > 0)
diff --git a/packages/core/test/session-runner.test.ts b/packages/core/test/session-runner.test.ts
index 0ff2a86e84..ed1c1b3e21 100644
--- a/packages/core/test/session-runner.test.ts
+++ b/packages/core/test/session-runner.test.ts
@@ -19,6 +19,7 @@ import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { LayerNodePlatform } from "@opencode-ai/core/effect/app-node-platform"
 import { LayerNode } from "@opencode-ai/core/effect/layer-node"
 import { EventV2 } from "@opencode-ai/core/event"
+import { Flag } from "@opencode-ai/core/flag/flag"
 import { PermissionV2 } from "@opencode-ai/core/permission"
 import { EventTable } from "@opencode-ai/core/event/sql"
 import { Project } from "@opencode-ai/core/project"
@@ -3043,6 +3044,21 @@ describe("SessionRunnerLLM", () => {
     }),
   )
 
+  it.effect("adds session correlation headers to model requests", () =>
+    Effect.gen(function* () {
+      const session = yield* setup
+      yield* admit(session, "Run correlated request")
+
+      yield* session.resume(sessionID)
+
+      expect(requests[0]?.http?.headers).toEqual({
+        "x-opencode-project": Project.ID.global,
+        "x-opencode-session": sessionID,
+        "x-opencode-client": Flag.OPENCODE_CLIENT,
+      })
+    }),
+  )
+
   it.effect("runs different sessions concurrently", () =>
     Effect.gen(function* () {
       const session = yield* setup
diff --git a/packages/tui/src/context/data.tsx b/packages/tui/src/context/data.tsx
index 66ca56fcc9..114da13a1f 100644
--- a/packages/tui/src/context/data.tsx
+++ b/packages/tui/src/context/data.tsx
@@ -27,7 +27,7 @@ import type {
   SkillInfo,
   OpenCodeEvent,
 } from "@opencode-ai/client"
-import type { Data } from "@opencode-ai/plugin/v2/tui/context"
+import type { Plugin } from "@opencode-ai/plugin/v2/tui"
 import { createStore, produce, reconcile } from "solid-js/store"
 import { createSimpleContext } from "./helper"
 import { useClient } from "./client"
@@ -1108,7 +1108,7 @@ export const { use: useData, provider: DataProvider } = createSimpleContext({
         },
       },
     }
-    result satisfies Data
+    result satisfies Plugin.Context["data"]
 
     async function bootstrap() {
       if (bootstrapping) return bootstrapping