diff --git a/apps/server/src/orchestration-v2/Adapters/AntigravityAdapterV2.ts b/apps/server/src/orchestration-v2/Adapters/AntigravityAdapterV2.ts
index 1490140c1e6e2..d419679d5f64d 100644
--- a/apps/server/src/orchestration-v2/Adapters/AntigravityAdapterV2.ts
+++ b/apps/server/src/orchestration-v2/Adapters/AntigravityAdapterV2.ts
@@ -70,11 +70,17 @@ const AntigravityProviderCapabilitiesV2 = {
   },
 } satisfies OrchestrationV2ProviderCapabilities;
 
+export type AntigravityRuntimeInput = Omit<
+  AntigravityAcpRuntimeInput,
+  "spawn" | "childProcessSpawner"
+> &
+  Pick<AcpAdapterV2RuntimeInput, "processEnvironment">;
+
 export interface AntigravityAdapterV2Options {
   readonly instanceId: ProviderInstanceId;
   readonly selfInvocation: SelfInvocation;
   readonly makeRuntime: (
-    input: Omit<AntigravityAcpRuntimeInput, "spawn" | "childProcessSpawner">,
+    input: AntigravityRuntimeInput,
   ) => Effect.Effect<
     AcpSessionRuntime.AcpSessionRuntime["Service"],
     EffectAcpErrors.AcpError | ProviderSetupError,
diff --git a/apps/server/src/orchestration-v2/Adapters/GrokAdapterV2.test.ts b/apps/server/src/orchestration-v2/Adapters/GrokAdapterV2.test.ts
index dec55480af300..f709653384399 100644
--- a/apps/server/src/orchestration-v2/Adapters/GrokAdapterV2.test.ts
+++ b/apps/server/src/orchestration-v2/Adapters/GrokAdapterV2.test.ts
@@ -1,6 +1,7 @@
 import * as NodeCrypto from "@effect/platform-node/NodeCrypto";
 import * as NodeServices from "@effect/platform-node/NodeServices";
 import {
+  EnvironmentId,
   ProjectId,
   MessageId,
   NodeId,
@@ -246,11 +247,16 @@ describe("Grok launch permission mode", () => {
     layerHost,
   );
 
-  const launchArgs = (runtimePolicy: ProviderAdapter.ProviderAdapterV2RuntimePolicy) =>
+  const launches = (runtimePolicy: ProviderAdapter.ProviderAdapterV2RuntimePolicy) =>
     Effect.gen(function* () {
-      const launches: Array<ReadonlyArray<string>> = [];
+      const launches: Array<{
+        readonly args: ReadonlyArray<string>;
+        readonly env: Record<string, unknown> | undefined;
+      }> = [];
       const childProcessSpawner = ChildProcessSpawner.make((command) => {
-        if (command._tag === "StandardCommand") launches.push(command.args.map(String));
+        if (command._tag === "StandardCommand") {
+          launches.push({ args: command.args.map(String), env: command.options.env });
+        }
         return Effect.fail(
           PlatformError.systemError({
             _tag: "NotFound",
@@ -260,6 +266,16 @@ describe("Grok launch permission mode", () => {
         );
       });
       const instanceId = ProviderInstanceId.make("grok-launch-test");
+      const threadId = ThreadId.make("grok-launch-test");
+      yield* (yield* McpProviderSessions.McpProviderSessions).set({
+        environmentId: EnvironmentId.make("grok-launch-test"),
+        threadId,
+        providerSessionId: "grok-launch-test",
+        providerInstanceId: instanceId,
+        endpoint: "http://127.0.0.1:43123/mcp",
+        authorizationHeader: "Bearer grok-launch-test",
+        browserToolsAvailable: false,
+      });
       const adapter = yield* makeGrokAdapterV2({
         instanceId,
         settings: LAUNCH_TEST_GROK_SETTINGS,
@@ -269,7 +285,7 @@ describe("Grok launch permission mode", () => {
       }).pipe(Effect.provideService(ChildProcessSpawner.ChildProcessSpawner, childProcessSpawner));
       yield* adapter
         .openSession({
-          threadId: ThreadId.make("grok-launch-test"),
+          threadId,
           providerSessionId: ProviderSessionId.make("grok-launch-test"),
           modelSelection: { instanceId, model: "grok-build" },
           runtimePolicy,
@@ -277,6 +293,8 @@ describe("Grok launch permission mode", () => {
         .pipe(Effect.scoped, Effect.ignore);
       return launches;
     }).pipe(Effect.provideService(HostProcess.Platform, "darwin"), Effect.provide(layerTest));
+  const launchArgs = (runtimePolicy: ProviderAdapter.ProviderAdapterV2RuntimePolicy) =>
+    launches(runtimePolicy).pipe(Effect.map((all) => all.map(({ args }) => args)));
 
   const policy = (
     runtimeMode: RuntimeMode,
@@ -303,6 +321,13 @@ describe("Grok launch permission mode", () => {
     }),
   );
 
+  it.effect("launches Grok with the thread id its tools inherit", () =>
+    Effect.gen(function* () {
+      const [launch] = yield* launches(policy("full-access"));
+      assert.equal(launch?.env?.T3CODE_THREAD_ID, "grok-launch-test");
+    }),
+  );
+
   it.effect("launches a thread stored as Auto-accept edits asking", () =>
     Effect.gen(function* () {
       const snapshot = yield* buildInitialGrokProviderSnapshot(LAUNCH_TEST_GROK_SETTINGS);
diff --git a/apps/server/src/provider/Drivers/AntigravityDriver.test.ts b/apps/server/src/provider/Drivers/AntigravityDriver.test.ts
index c4486916c7d3c..19bbab796ff99 100644
--- a/apps/server/src/provider/Drivers/AntigravityDriver.test.ts
+++ b/apps/server/src/provider/Drivers/AntigravityDriver.test.ts
@@ -3,7 +3,10 @@ import * as NodeServices from "@effect/platform-node/NodeServices";
 import { expect, it } from "@effect/vitest";
 import {
   ANTIGRAVITY_DEFAULT_MODEL,
+  EnvironmentId,
   ProviderInstanceId,
+  ProviderSessionId,
+  ThreadId,
   type AntigravitySettings,
 } from "@t3tools/contracts";
 import * as HostProcess from "@t3tools/shared/HostProcess";
@@ -28,6 +31,7 @@ import * as ProviderEventLoggers from "@t3tools/provider-core/server/ProviderEve
 import * as McpProviderSessions from "@t3tools/provider-core/server/McpProviderSessions";
 import * as ModelManifest from "../ModelManifest.ts";
 import * as IdAllocator from "@t3tools/provider-core/server/IdAllocator";
+import * as ProviderAdapter from "@t3tools/provider-core/server/ProviderAdapter";
 import { AntigravityDriver } from "./AntigravityDriver.ts";
 import * as ProviderHostLive from "../ProviderHostLive.ts";
 import * as ServerSecretStore from "../../auth/ServerSecretStore.ts";
@@ -124,6 +128,7 @@ const makeHarness = Effect.fn("makeAntigravityDriverHarness")(function* (
     tempDirectory: string | undefined;
     handle: ChildProcessSpawner.ChildProcessHandle;
   }> = [];
+  const agentThreadIds: Array<string | undefined> = [];
 
   const layerInstallation = Layer.mock(AntigravityInstallation.AntigravityInstallation)({
     managedDirectory: root,
@@ -160,12 +165,15 @@ const makeHarness = Effect.fn("makeAntigravityDriverHarness")(function* (
     Effect.gen(function* () {
       if (command._tag !== "StandardCommand")
         return yield* Effect.die("Unexpected process pipeline.");
-      const handle = yield* spawner.spawn(command);
       const environment = command.options.env ?? {};
       const env = (name: string) => {
         const value = environment[name];
         return Redacted.isRedacted(value) ? Redacted.value(value) : value;
       };
+      if (environment.ANTIGRAVITY_HARNESS_PATH !== undefined) {
+        agentThreadIds.push(env("T3CODE_THREAD_ID"));
+      }
+      const handle = yield* spawner.spawn(command);
       launches.push({
         command: command.command,
         args: command.args.map(String),
@@ -224,6 +232,7 @@ const makeHarness = Effect.fn("makeAntigravityDriverHarness")(function* (
     }
   });
   return {
+    instanceId,
     instance,
     refresh,
     fs,
@@ -238,6 +247,7 @@ const makeHarness = Effect.fn("makeAntigravityDriverHarness")(function* (
     acquisitions,
     releases,
     launches,
+    agentThreadIds,
     readRequests,
     assertClosed,
   };
@@ -359,6 +369,35 @@ it.layer(layerTest)("AntigravityDriver", (it) => {
       }).pipe(Effect.scoped),
   );
 
+  it.effect("launches a thread's agent with the thread id its tools inherit", () =>
+    Effect.gen(function* () {
+      const h = yield* makeHarness();
+      const threadId = ThreadId.make("antigravity-thread-env");
+      yield* (yield* McpProviderSessions.McpProviderSessions).set({
+        environmentId: EnvironmentId.make("antigravity-thread-env"),
+        threadId,
+        providerSessionId: "antigravity-thread-env",
+        providerInstanceId: h.instanceId,
+        endpoint: "http://127.0.0.1:43123/mcp",
+        authorizationHeader: "Bearer antigravity-thread-env",
+        browserToolsAvailable: false,
+      });
+      yield* h.instance.orchestrationAdapter
+        .openSession({
+          threadId,
+          providerSessionId: ProviderSessionId.make("antigravity-thread-env"),
+          modelSelection: { instanceId: h.instanceId, model: ANTIGRAVITY_DEFAULT_MODEL },
+          runtimePolicy: ProviderAdapter.ProviderAdapterV2RuntimePolicy.make({
+            runtimeMode: "full-access",
+            interactionMode: "default",
+            cwd: process.cwd(),
+          }),
+        })
+        .pipe(Effect.scoped, Effect.exit);
+      expect(h.agentThreadIds).toEqual([threadId]);
+    }).pipe(Effect.scoped),
+  );
+
   it.effect.skipIf(windowsHost)("keeps the previous catalog when executable resolution fails", () =>
     Effect.gen(function* () {
       const h = yield* makeHarness();
diff --git a/apps/server/src/provider/Drivers/AntigravityDriver.ts b/apps/server/src/provider/Drivers/AntigravityDriver.ts
index cad62882e6813..00ad39e50566e 100644
--- a/apps/server/src/provider/Drivers/AntigravityDriver.ts
+++ b/apps/server/src/provider/Drivers/AntigravityDriver.ts
@@ -57,7 +57,10 @@ import {
 } from "../acp/AntigravitySessionFiles.ts";
 import * as IdAllocator from "@t3tools/provider-core/server/IdAllocator";
 import * as ProviderContinuationRequests from "@t3tools/provider-core/server/ProviderContinuationRequests";
-import { makeAntigravityAdapterV2 } from "../../orchestration-v2/Adapters/AntigravityAdapterV2.ts";
+import {
+  makeAntigravityAdapterV2,
+  type AntigravityRuntimeInput,
+} from "../../orchestration-v2/Adapters/AntigravityAdapterV2.ts";
 import { makeAcpNativeLoggerFactory } from "@t3tools/provider-acp/server/nativeLogging";
 import { ProviderDriverError } from "../Errors.ts";
 import { makeAntigravityProvider } from "../AntigravityProvider.ts";
@@ -182,7 +185,7 @@ export const AntigravityDriver: ProviderDriver<
       );
 
     const makeRuntime = Effect.fn("AntigravityDriver.makeRuntime")(function* (
-      input: Omit<AntigravityAcpRuntimeInput, "spawn" | "childProcessSpawner">,
+      input: AntigravityRuntimeInput,
     ): Effect.fn.Return<
       AcpSessionRuntime.AcpSessionRuntime["Service"],
       AcpError | ProviderSetupError,
@@ -260,7 +263,7 @@ export const AntigravityDriver: ProviderDriver<
           installation: executable,
           profile,
           cwd: input.cwd,
-          baseEnv: processEnvironment,
+          baseEnv: { ...processEnvironment, ...input.processEnvironment },
           auth,
           runtimeTempDirectory,
         }),
diff --git a/packages/provider-grok/src/server/adapter.ts b/packages/provider-grok/src/server/adapter.ts
index 9ed1368f16984..5ab250dee56ed 100644
--- a/packages/provider-grok/src/server/adapter.ts
+++ b/packages/provider-grok/src/server/adapter.ts
@@ -291,12 +291,12 @@ export function makeGrokAcpAdapterFlavor(
     }),
     makeRuntime:
       options.makeRuntime ??
-      (({ runtimePolicy, ...input }) =>
+      (({ runtimePolicy, processEnvironment, ...input }) =>
         makeGrokAcpRuntime({
           ...input,
           interruptPromptOnCancel: input.interruptPromptOnCancel ?? false,
           grokSettings: options.settings,
-          environment: options.environment,
+          environment: { ...options.environment, ...processEnvironment },
           runtimeMode: grokLaunchRuntimeMode(runtimePolicy),
         })),
     // Auto prompts represent classifier refusals and must reach the user.