feat(config): add user reviews to docs and improve Antigravity provider config

- Add user reviews section to READMEs (EN, KO, JA, ZH-CN)
- Update Antigravity request.ts: change default model from gemini-3-pro-preview to gemini-3-pro-high
- Enhance config-manager.ts: add full model specs (name, limit, modalities) to provider config
- Add comprehensive test suite for config-manager (config-manager.test.ts)

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

src/auth/antigravity/request.ts

@@ -5,10 +5,10 @@
  */
 
 import {
-  ANTIGRAVITY_HEADERS,
-  ANTIGRAVITY_ENDPOINT_FALLBACKS,
-  ANTIGRAVITY_API_VERSION,
-  SKIP_THOUGHT_SIGNATURE_VALIDATOR,
+    ANTIGRAVITY_API_VERSION,
+    ANTIGRAVITY_ENDPOINT_FALLBACKS,
+    ANTIGRAVITY_HEADERS,
+    SKIP_THOUGHT_SIGNATURE_VALIDATOR,
 } from "./constants"
 import type { AntigravityRequestBody } from "./types"
 
@@ -262,7 +262,7 @@ export function transformRequest(options: TransformRequestOptions): TransformedR
   } = options
 
   const effectiveModel =
-    modelName || extractModelFromBody(body) || extractModelFromUrl(url) || "gemini-3-pro-preview"
+    modelName || extractModelFromBody(body) || extractModelFromUrl(url) || "gemini-3-pro-high"
 
   const streaming = isStreamingRequest(url, body)
   const action = streaming ? "streamGenerateContent" : "generateContent"

src/cli/config-manager.test.ts

@@ -0,0 +1,36 @@
+import { describe, expect, test } from "bun:test"
+
+import { ANTIGRAVITY_PROVIDER_CONFIG } from "./config-manager"
+
+describe("config-manager ANTIGRAVITY_PROVIDER_CONFIG", () => {
+  test("Gemini models include full spec (limit + modalities)", () => {
+    const google = (ANTIGRAVITY_PROVIDER_CONFIG as any).google
+    expect(google).toBeTruthy()
+
+    const models = google.models as Record<string, any>
+    expect(models).toBeTruthy()
+
+    const required = [
+      "gemini-3-pro-high",
+      "gemini-3-pro-medium",
+      "gemini-3-pro-low",
+      "gemini-3-flash",
+      "gemini-3-flash-lite",
+    ]
+
+    for (const key of required) {
+      const model = models[key]
+      expect(model).toBeTruthy()
+      expect(typeof model.name).toBe("string")
+      expect(model.name.includes("(Antigravity)")).toBe(true)
+
+      expect(model.limit).toBeTruthy()
+      expect(typeof model.limit.context).toBe("number")
+      expect(typeof model.limit.output).toBe("number")
+
+      expect(model.modalities).toBeTruthy()
+      expect(Array.isArray(model.modalities.input)).toBe(true)
+      expect(Array.isArray(model.modalities.output)).toBe(true)
+    }
+  })
+})

src/cli/config-manager.ts

@@ -1,7 +1,7 @@
-import { existsSync, readFileSync, writeFileSync, mkdirSync } from "node:fs"
-import { join } from "node:path"
+import { existsSync, mkdirSync, readFileSync, writeFileSync } from "node:fs"
 import { homedir } from "node:os"
-import type { ConfigMergeResult, InstallConfig, DetectedConfig } from "./types"
+import { join } from "node:path"
+import type { ConfigMergeResult, DetectedConfig, InstallConfig } from "./types"
 
 const OPENCODE_CONFIG_DIR = join(homedir(), ".config", "opencode")
 const OPENCODE_JSON = join(OPENCODE_CONFIG_DIR, "opencode.json")
@@ -359,16 +359,46 @@ export async function runBunInstall(): Promise<boolean> {
   }
 }
 
-const ANTIGRAVITY_PROVIDER_CONFIG = {
+export const ANTIGRAVITY_PROVIDER_CONFIG = {
   google: {
     name: "Google",
     api: "antigravity",
+    // NOTE: opencode-antigravity-auth expects full model specs (name/limit/modalities).
+    // If these are incomplete, models may appear but fail at runtime (e.g. 404).
     models: {
-      "gemini-3-pro-high": { name: "Gemini 3 Pro (High)", thinking: true, attachment: true },
-      "gemini-3-pro-medium": { name: "Gemini 3 Pro (Medium)", thinking: true, attachment: true },
-      "gemini-3-pro-low": { name: "Gemini 3 Pro (Low)", thinking: true, attachment: true },
-      "gemini-3-flash": { name: "Gemini 3 Flash", attachment: true },
-      "gemini-3-flash-lite": { name: "Gemini 3 Flash Lite", attachment: true },
+      "gemini-3-pro-high": {
+        name: "Gemini 3 Pro High (Antigravity)",
+        thinking: true,
+        attachment: true,
+        limit: { context: 1048576, output: 65535 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+      },
+      "gemini-3-pro-medium": {
+        name: "Gemini 3 Pro Medium (Antigravity)",
+        thinking: true,
+        attachment: true,
+        limit: { context: 1048576, output: 65535 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+      },
+      "gemini-3-pro-low": {
+        name: "Gemini 3 Pro Low (Antigravity)",
+        thinking: true,
+        attachment: true,
+        limit: { context: 1048576, output: 65535 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+      },
+      "gemini-3-flash": {
+        name: "Gemini 3 Flash (Antigravity)",
+        attachment: true,
+        limit: { context: 1048576, output: 65536 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+      },
+      "gemini-3-flash-lite": {
+        name: "Gemini 3 Flash Lite (Antigravity)",
+        attachment: true,
+        limit: { context: 1048576, output: 65536 },
+        modalities: { input: ["text", "image", "pdf"], output: ["text"] },
+      },
     },
   },
 }