feat(server): add Antigravity provider

README.md

@@ -2,7 +2,7 @@
 
 T3 Code is an "agent harness control surface". It enables control of the agents on your machine with a best-in-class mobile app ([iOS](https://apps.apple.com/us/app/t3-code-remote-claude-more/id6787819824), [Android](https://play.google.com/store/apps/details?id=com.t3tools.t3code)), [web app](https://app.t3.codes) and [Electron-based desktop app](https://t3.codes).
 
-Works with your subscriptions on Claude Code, Codex, Cursor, Grok Build, and OpenCode. If they're set up on your computer, T3 Code can control them.
+Works with your subscriptions on Claude Code, Codex, Cursor, Grok Build, OpenCode, and Google Antigravity. If they're set up on your computer, T3 Code can control them.
 
 ## "Wait, what are you selling me?"
 
@@ -13,13 +13,14 @@ We wanted something performant, remote-ready, and truly open. If we ever go the
 ## Installation
 
 > [!WARNING]
-> T3 Code currently supports Codex, Claude, Cursor, Grok Build and OpenCode. Install and authenticate at least one provider before use:
+> T3 Code currently supports Codex, Claude, Cursor, Grok Build, OpenCode, and Google Antigravity. Install and authenticate at least one provider before use:
 >
 > - Codex: install [Codex CLI](https://developers.openai.com/codex/cli) and run `codex login`
 > - Claude: install [Claude Code](https://claude.com/product/claude-code) and run `claude auth login`
 > - Cursor: install [Cursor CLI](https://cursor.com/cli) and run `agent login`
 > - Grok Build: install [Grok Build CLI](https://x.ai/cli) and run `grok login`
 > - OpenCode: install [OpenCode](https://opencode.ai) and run `opencode auth login`
+> - Antigravity: install [Antigravity CLI](https://antigravity.google/docs/cli/install/) and run `agy` to sign in
 
 ### Try it out (install-free)
 
@@ -83,6 +84,7 @@ Full docs live in [docs/](./docs). There's no docs site yet.
 - [Keeping app and server in sync](./docs/user/updating.md)
 - [Source control integrations](./docs/user/source-control.md)
 - Multiple accounts: [Codex](./docs/user/providers-codex.md) · [Claude](./docs/user/providers-claude.md)
+- Provider setup: [Antigravity](./docs/user/providers-antigravity.md)
 - Linux: [run T3 Code as a background service](./docs/user/background-service.md)
 
 Building from source? Start at [docs/internals/overview.md](./docs/internals/overview.md).

apps/mobile/src/components/ProviderIcon.tsx

@@ -12,6 +12,17 @@ export function ProviderIcon(props: ProviderIconProps) {
   const size = props.size ?? 16;
   const mono = isDarkMode ? "#e5e5e5" : "#171717";
 
+  if (props.provider === "agy") {
+    return (
+      <Svg width={size} height={size} viewBox="-1 -1 18 17" fill="none">
+        <Path
+          fill={mono}
+          d="M14.0777 13.984C14.945 14.6345 16.2458 14.2008 15.0533 13.0084C11.476 9.53949 12.2349 0 7.79033 0C3.34579 0 4.10461 9.53949 0.527295 13.0084C-0.773543 14.3092 0.635692 14.6345 1.50293 13.984C4.86344 11.7076 4.64663 7.69664 7.79033 7.69664C10.934 7.69664 10.7172 11.7076 14.0777 13.984Z"
+        />
+      </Svg>
+    );
+  }
+
   if (props.provider === "claudeAgent") {
     return (
       <Svg width={size} height={size} viewBox="0 0 256 257" fill="none">

apps/server/src/provider/AgyModelSelection.ts

@@ -0,0 +1,11 @@
+const AGY_REASONING_EFFORT_SUFFIX = /^(.*)-(low|medium|high)$/;
+
+export function resolveAgyModelForEffort(
+  model: string | undefined,
+  effort: string | undefined,
+): string | undefined {
+  if (!model || !effort) return model;
+
+  const match = AGY_REASONING_EFFORT_SUFFIX.exec(model);
+  return match?.[1] ? `${match[1]}-${effort}` : model;
+}

apps/server/src/provider/Drivers/AgyDriver.ts

@@ -0,0 +1,148 @@
+import { AgySettings, ProviderDriverKind, type ServerProvider } from "@t3tools/contracts";
+import * as Crypto from "effect/Crypto";
+import * as Effect from "effect/Effect";
+import * as FileSystem from "effect/FileSystem";
+import * as Path from "effect/Path";
+import * as Schema from "effect/Schema";
+import { HttpClient } from "effect/unstable/http";
+import { ChildProcessSpawner } from "effect/unstable/process";
+
+import * as BackgroundPolicy from "../../background/BackgroundPolicy.ts";
+import { ServerSettingsService } from "../../serverSettings.ts";
+import { makeAgyTextGeneration } from "../../textGeneration/AgyTextGeneration.ts";
+import { ProviderDriverError } from "../Errors.ts";
+import { makeAgyAdapter } from "../Layers/AgyAdapter.ts";
+import { buildInitialAgyProviderSnapshot, checkAgyProviderStatus } from "../Layers/AgyProvider.ts";
+import { ProviderEventLoggers } from "../Layers/ProviderEventLoggers.ts";
+import { makeManagedServerProvider } from "../makeManagedServerProvider.ts";
+import {
+  defaultProviderContinuationIdentity,
+  type ProviderDriver,
+  type ProviderInstance,
+} from "../ProviderDriver.ts";
+import type { ServerProviderDraft } from "../providerSnapshot.ts";
+import { mergeProviderInstanceEnvironment } from "../ProviderInstanceEnvironment.ts";
+import {
+  makeManualOnlyProviderMaintenanceCapabilities,
+  makeStaticProviderMaintenanceResolver,
+  resolveProviderMaintenanceCapabilitiesEffect,
+} from "../providerMaintenance.ts";
+import {
+  haveProviderSnapshotSettingsChanged,
+  makeProviderSnapshotSettingsSource,
+  type ProviderSnapshotSettings,
+} from "../providerUpdateSettings.ts";
+
+const decodeAgySettings = Schema.decodeSync(AgySettings);
+
+const DRIVER_KIND = ProviderDriverKind.make("agy");
+
+const UPDATE = makeStaticProviderMaintenanceResolver(
+  makeManualOnlyProviderMaintenanceCapabilities({
+    provider: DRIVER_KIND,
+    packageName: null,
+  }),
+);
+
+export type AgyDriverEnv =
+  | BackgroundPolicy.BackgroundPolicy
+  | ChildProcessSpawner.ChildProcessSpawner
+  | Crypto.Crypto
+  | FileSystem.FileSystem
+  | HttpClient.HttpClient
+  | Path.Path
+  | ProviderEventLoggers
+  | ServerSettingsService;
+
+const withInstanceIdentity =
+  (input: {
+    readonly instanceId: ProviderInstance["instanceId"];
+    readonly displayName: string | undefined;
+    readonly accentColor: string | undefined;
+    readonly continuationGroupKey: string;
+  }) =>
+  (snapshot: ServerProviderDraft): ServerProvider => ({
+    ...snapshot,
+    instanceId: input.instanceId,
+    driver: DRIVER_KIND,
+    ...(input.displayName ? { displayName: input.displayName } : {}),
+    ...(input.accentColor ? { accentColor: input.accentColor } : {}),
+    continuation: { groupKey: input.continuationGroupKey },
+  });
+
+export const AgyDriver: ProviderDriver<AgySettings, AgyDriverEnv> = {
+  driverKind: DRIVER_KIND,
+  metadata: {
+    displayName: "Antigravity",
+    supportsMultipleInstances: true,
+  },
+  configSchema: AgySettings,
+  defaultConfig: (): AgySettings => decodeAgySettings({}),
+  create: ({ instanceId, displayName, accentColor, environment, enabled, config }) =>
+    Effect.gen(function* () {
+      const spawner = yield* ChildProcessSpawner.ChildProcessSpawner;
+      const serverSettings = yield* ServerSettingsService;
+      const eventLoggers = yield* ProviderEventLoggers;
+      const processEnv = mergeProviderInstanceEnvironment(environment);
+      const continuationIdentity = defaultProviderContinuationIdentity({
+        driverKind: DRIVER_KIND,
+        instanceId,
+      });
+      const stampIdentity = withInstanceIdentity({
+        instanceId,
+        displayName,
+        accentColor,
+        continuationGroupKey: continuationIdentity.continuationKey,
+      });
+      const effectiveConfig = { ...config, enabled } satisfies AgySettings;
+      const maintenanceCapabilities = yield* resolveProviderMaintenanceCapabilitiesEffect(UPDATE, {
+        binaryPath: effectiveConfig.binaryPath,
+        env: processEnv,
+      });
+
+      const adapter = yield* makeAgyAdapter(effectiveConfig, {
+        environment: processEnv,
+        ...(eventLoggers.native ? { nativeEventLogger: eventLoggers.native } : {}),
+        instanceId,
+      });
+      const textGeneration = yield* makeAgyTextGeneration(effectiveConfig, processEnv);
+
+      const checkProvider = checkAgyProviderStatus(effectiveConfig, processEnv).pipe(
+        Effect.map(stampIdentity),
+        Effect.provideService(ChildProcessSpawner.ChildProcessSpawner, spawner),
+      );
+
+      const snapshotSettings = makeProviderSnapshotSettingsSource(effectiveConfig, serverSettings);
+      const snapshot = yield* makeManagedServerProvider<ProviderSnapshotSettings<AgySettings>>({
+        maintenanceCapabilities,
+        getSettings: snapshotSettings.getSettings,
+        streamSettings: snapshotSettings.streamSettings,
+        haveSettingsChanged: haveProviderSnapshotSettingsChanged,
+        initialSnapshot: (settings) =>
+          buildInitialAgyProviderSnapshot(settings.provider).pipe(Effect.map(stampIdentity)),
+        checkProvider,
+      }).pipe(
+        Effect.mapError(
+          (cause) =>
+            new ProviderDriverError({
+              driver: DRIVER_KIND,
+              instanceId,
+              detail: "Failed to build the Antigravity provider snapshot.",
+              cause,
+            }),
+        ),
+      );
+
+      return {
+        instanceId,
+        driverKind: DRIVER_KIND,
+        continuationIdentity,
+        displayName,
+        accentColor,
+        enabled,
+        snapshot,
+        adapter,
+        textGeneration,
+      } satisfies ProviderInstance;
+    }),
+};