fix(gemini-cli-auth): use valid Linux platform enum (#32382) (thanks @riftzen-bit)

Address review feedback: since resolvePlatform() no longer returns
"LINUX", remove it from the union type to prevent future confusion.

CHANGELOG.md

@@ -49,6 +49,7 @@ Docs: https://docs.openclaw.ai
 - Feishu/default account resolution: always honor explicit `channels.feishu.defaultAccount` during outbound account selection (including top-level-credential setups where the preferred id is not present in `accounts`), instead of silently falling back to another account id. (#32253) Thanks @bmendonca3.
 - Gemini schema sanitization: coerce malformed JSON Schema `properties` values (`null`, arrays, primitives) to `{}` before provider validation, preventing downstream strict-validator crashes on invalid plugin/tool schemas. (#32332) Thanks @webdevtodayjason.
 - Models/openai-completions developer-role compatibility: force `supportsDeveloperRole=false` for non-native endpoints, treat unparseable `baseUrl` values as non-native, and add regression coverage for empty/malformed baseUrl plus explicit-true override behavior. (#29479) thanks @akramcodez.
+- Gemini CLI OAuth/Linux compatibility: send `PLATFORM_UNSPECIFIED` (instead of invalid `LINUX`) in `loadCodeAssist` metadata so Linux OAuth flows no longer fail with provider 400 enum errors. (#32382) Thanks @riftzen-bit.
 - OpenAI/Responses WebSocket tool-call id hygiene: normalize blank/whitespace streamed tool-call ids before persistence, and block empty `function_call_output.call_id` payloads in the WS conversion path to avoid OpenAI 400 errors (`Invalid 'input[n].call_id': empty string`), with regression coverage for both inbound stream normalization and outbound payload guards.
 - Gateway/Control UI basePath webhook passthrough: let non-read methods under configured `controlUiBasePath` fall through to plugin routes (instead of returning Control UI 405), restoring webhook handlers behind basePath mounts. (#32311) Thanks @ademczuk.
 - CLI/Config validation and routing hardening: dedupe `openclaw config validate` failures to a single authoritative report, expose allowed-values metadata/hints across core Zod and plugin AJV validation (including `--json` fields), sanitize terminal-rendered validation text, and make command-path parsing root-option-aware across preaction/route/lazy registration (including routed `config get/unset` with split root options). Thanks @gumadeiras.

extensions/google-gemini-cli-auth/oauth.test.ts

@@ -239,14 +239,15 @@ describe("loginGeminiCliOAuth", () => {
     "GOOGLE_CLOUD_PROJECT_ID",
   ] as const;
 
-  function getExpectedPlatform(): "WINDOWS" | "MACOS" | "LINUX" {
+  function getExpectedPlatform(): "WINDOWS" | "MACOS" | "PLATFORM_UNSPECIFIED" {
     if (process.platform === "win32") {
       return "WINDOWS";
     }
-    if (process.platform === "linux") {
-      return "LINUX";
+    if (process.platform === "darwin") {
+      return "MACOS";
     }
-    return "MACOS";
+    // Matches updated resolvePlatform() which uses PLATFORM_UNSPECIFIED for Linux
+    return "PLATFORM_UNSPECIFIED";
   }
 
   function getRequestUrl(input: string | URL | Request): string {

extensions/google-gemini-cli-auth/oauth.ts

@@ -224,14 +224,16 @@ function generatePkce(): { verifier: string; challenge: string } {
   return { verifier, challenge };
 }
 
-function resolvePlatform(): "WINDOWS" | "MACOS" | "LINUX" {
+function resolvePlatform(): "WINDOWS" | "MACOS" | "PLATFORM_UNSPECIFIED" {
   if (process.platform === "win32") {
     return "WINDOWS";
   }
-  if (process.platform === "linux") {
-    return "LINUX";
+  if (process.platform === "darwin") {
+    return "MACOS";
   }
-  return "MACOS";
+  // Google's loadCodeAssist API rejects "LINUX" as an invalid Platform enum value.
+  // Use "PLATFORM_UNSPECIFIED" for Linux and other platforms to match the pi-ai runtime.
+  return "PLATFORM_UNSPECIFIED";
 }
 
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