fix(google-auth): integrate into main package via config option

Fixes #30. OpenCode's plugin loader treats subpath exports like
"oh-my-opencode/google-auth" as separate npm packages, causing
BunInstallFailedError.

Solution: Enable Google auth via `google_auth: true` in
oh-my-opencode.json instead of a separate subpath plugin.

🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)

Author: code-yeongyu

README.ko.md

@@ -43,7 +43,7 @@ OpenCode 가 낭만이 사라진것같은 오늘날의 시대에, 당신에게 
   - 이 플러그인은 [OpenCode Zen](https://opencode.ai/docs/zen/), Google, OpenAI, Anthropic 의 모델을 사용합니다.
     - Anthropic 모델들을 사용하기 위해 [OpenCode 의 내장 Claude Code Max Plan 로그인 기능](https://opencode.ai/docs/providers/#anthropic)을 사용하세요.
     - OpenAI 모델 (ChatGPT Plus/Pro)을 사용하기 위해 [OpenCode-OpenAI-Codex-Auth 플러그인](https://github.com/numman-ali/opencode-openai-codex-auth)을 설치하세요.
-    - Google Gemini 모델을 위해 `oh-my-opencode/google-auth` 플러그인을 추가하세요 (**내장 Antigravity OAuth**).
+    - Google Gemini 모델을 위해 `oh-my-opencode.json`에서 `google_auth: true`를 활성화하세요 (**내장 Antigravity OAuth**).
     - 다른 프로바이더를 위해 [VibeProxy (macOS Only)](https://github.com/automazeio/vibeproxy) 또는 [CLIProxyAPI](https://github.com/router-for-me/CLIProxyAPI)를 대안으로 사용할 수 있습니다.
 - **사실 밑의 내용은 읽지 않아도 됩니다. 그냥 설치하시면 됩니다. 모델 설정하고나면 추가로 공부하거나 알 필요가 없고, 설치하고 나면 그냥 더 좋아집니다.**
 - **이 문서도 그냥 Claude Code, OpenCode, Cursor에 붙여넣고, 설치하고, 사용자의 개입이 필요할 때 알려달라고 프롬프팅하세요. 그럼 그냥 깔립니다.**
@@ -123,14 +123,11 @@ opencode auth login
 
 #### 4.2 Google Gemini (내장 Antigravity OAuth)
 
-먼저 google-auth 플러그인을 추가:
+먼저 `~/.config/opencode/oh-my-opencode.json` (또는 프로젝트 레벨의 `.opencode/oh-my-opencode.json`)에서 Google auth를 활성화:
 
 ```json
 {
-  "plugin": [
-    "oh-my-opencode",
-    "oh-my-opencode/google-auth"
-  ]
+  "google_auth": true
 }
 ```
 

README.md

@@ -42,7 +42,7 @@ Even if you don't, invest a little time. Boost your skills and productivity by m
   - This plugin utilizes models from [OpenCode Zen](https://opencode.ai/docs/zen/), Google, OpenAI, and Anthropic.
     - For Anthropic models, use [OpenCode's built-in Claude Code Max Plan login](https://opencode.ai/docs/providers/#anthropic).
     - For OpenAI models (ChatGPT Plus/Pro), install the [OpenCode-OpenAI-Codex-Auth plugin](https://github.com/numman-ali/opencode-openai-codex-auth).
-    - For Google Gemini models, add `oh-my-opencode/google-auth` plugin for **built-in Antigravity OAuth**.
+    - For Google Gemini models, enable `google_auth: true` in `oh-my-opencode.json` for **built-in Antigravity OAuth**.
     - For other providers, [VibeProxy (macOS Only)](https://github.com/automazeio/vibeproxy) or [CLIProxyAPI](https://github.com/router-for-me/CLIProxyAPI) remain available as alternatives.
 - **Truth be told, the rest is optional. Just install it. Once set up, no further learning is required. It simply evolves.**
 - **Paste this document into Claude Code, OpenCode, or Cursor, instruct it to install, and ask for assistance if needed. It just installs.**
@@ -122,14 +122,11 @@ opencode auth login
 
 #### 4.2 Google Gemini (Built-in Antigravity OAuth)
 
-First, add the google-auth plugin:
+First, enable Google auth in `~/.config/opencode/oh-my-opencode.json` (or `.opencode/oh-my-opencode.json` for project-level):
 
 ```json
 {
-  "plugin": [
-    "oh-my-opencode",
-    "oh-my-opencode/google-auth"
-  ]
+  "google_auth": true
 }
 ```
 

src/config/schema.ts

@@ -64,6 +64,7 @@ export const OhMyOpenCodeConfigSchema = z.object({
   disabled_agents: z.array(AgentNameSchema).optional(),
   agents: AgentOverridesSchema.optional(),
   claude_code: ClaudeCodeConfigSchema.optional(),
+  google_auth: z.boolean().optional(),
 })
 
 export type OhMyOpenCodeConfig = z.infer<typeof OhMyOpenCodeConfigSchema>

src/index.ts

@@ -16,6 +16,7 @@ import {
   createBackgroundNotificationHook,
   createAutoUpdateCheckerHook,
 } from "./hooks";
+import { createGoogleAntigravityAuthPlugin } from "./auth/antigravity";
 import {
   loadUserCommands,
   loadProjectCommands,
@@ -173,7 +174,13 @@ const OhMyOpenCodePlugin: Plugin = async (ctx) => {
 
   const callOmoAgent = createCallOmoAgent(ctx, backgroundManager);
 
+  const googleAuthHooks = pluginConfig.google_auth
+    ? await createGoogleAntigravityAuthPlugin(ctx)
+    : null;
+
   return {
+    ...(googleAuthHooks ? { auth: googleAuthHooks.auth } : {}),
+
     tool: {
       ...builtinTools,
       ...backgroundTools,