fix: infer API protocol from base-url and add codex auth.json

- OpenCode/OpenClaw/Hermes: dynamically choose API protocol based on
  whether the base-url is an anthropic endpoint or openai-compatible
- Codex: write ~/.codex/auth.json alongside config.toml so users
  don't need to manually export OPENAI_API_KEY
- Add shared isAnthropicEndpoint() helper in writers/utils.ts

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: lishengzxc

packages/cli/src/commands/agent/writers/codex.ts

@@ -1,7 +1,7 @@
 import { homedir } from "os";
 import { join } from "path";
 import { mkdirSync, writeFileSync, renameSync } from "fs";
-import { backup, type AgentDef } from "./utils.ts";
+import { backup, readJson, writeJsonAtomic, type AgentDef } from "./utils.ts";
 
 export default {
   label: "Codex",
@@ -27,16 +27,16 @@ export default {
     writeFileSync(tmp, toml, { mode: 0o600 });
     renameSync(tmp, configPath);
 
-    // Also hint about OPENAI_API_KEY env var
-    const shell = process.platform === "win32" ? "powershell" : "shell";
-    const envHint =
-      shell === "powershell"
-        ? `Set env: [Environment]::SetEnvironmentVariable("OPENAI_API_KEY", "${apiKey}", "User")`
-        : `Set env: export OPENAI_API_KEY="${apiKey}"`;
+    // auth.json — store API key for Codex to read
+    const authPath = join(homedir(), ".codex", "auth.json");
+    backup(authPath);
+    const auth = readJson(authPath);
+    auth.OPENAI_API_KEY = apiKey;
+    writeJsonAtomic(authPath, auth);
 
     return {
-      paths: [configPath],
-      nextStep: `${envHint}\n  Then run \`codex\` to start using Codex with DashScope.`,
+      paths: [configPath, authPath],
+      nextStep: "Run `codex` to start using Codex with DashScope.",
     };
   },
 } satisfies AgentDef;

packages/cli/src/commands/agent/writers/hermes.ts

@@ -2,7 +2,7 @@ import { homedir } from "os";
 import { join } from "path";
 import { existsSync, readFileSync, writeFileSync, mkdirSync, renameSync } from "fs";
 import yaml from "yaml";
-import { backup, type AgentDef } from "./utils.ts";
+import { backup, isAnthropicEndpoint, type AgentDef } from "./utils.ts";
 
 export default {
   label: "Hermes Agent",
@@ -20,11 +20,12 @@ export default {
       }
     }
 
+    const apiMode = isAnthropicEndpoint(baseUrl) ? "anthropic_messages" : "chat_completions";
     config.model = {
       default: model,
       provider: "custom",
       base_url: baseUrl,
-      api_mode: "anthropic_messages",
+      api_mode: apiMode,
       api_key: apiKey,
     };
 

packages/cli/src/commands/agent/writers/openclaw.ts

@@ -1,6 +1,6 @@
 import { homedir } from "os";
 import { join } from "path";
-import { backup, readJson, writeJsonAtomic, type AgentDef } from "./utils.ts";
+import { backup, readJson, writeJsonAtomic, isAnthropicEndpoint, type AgentDef } from "./utils.ts";
 
 export default {
   label: "OpenClaw",
@@ -14,10 +14,11 @@ export default {
     const models = (config.models ?? {}) as Record<string, unknown>;
     models.mode = "merge";
     const providers = (models.providers ?? {}) as Record<string, unknown>;
+    const api = isAnthropicEndpoint(baseUrl) ? "anthropic-messages" : "openai-completions";
     providers.bailian = {
       baseUrl,
       apiKey,
-      api: "anthropic-messages",
+      api,
       models: [
         {
           id: model,

packages/cli/src/commands/agent/writers/opencode.ts

@@ -1,6 +1,6 @@
 import { homedir } from "os";
 import { join } from "path";
-import { backup, readJson, writeJsonAtomic, type AgentDef } from "./utils.ts";
+import { backup, readJson, writeJsonAtomic, isAnthropicEndpoint, type AgentDef } from "./utils.ts";
 
 export default {
   label: "OpenCode",
@@ -13,8 +13,9 @@ export default {
     if (!config.$schema) config.$schema = "https://opencode.ai/config.json";
 
     const provider = (config.provider ?? {}) as Record<string, unknown>;
+    const npm = isAnthropicEndpoint(baseUrl) ? "@ai-sdk/anthropic" : "@ai-sdk/openai-compatible";
     provider.bailian = {
-      npm: "@ai-sdk/anthropic",
+      npm,
       name: "Alibaba Cloud Model Studio",
       options: { baseURL: baseUrl, apiKey },
       models: { [model]: { name: model } },

packages/cli/src/commands/agent/writers/utils.ts

@@ -38,3 +38,7 @@ export function backup(path: string): void {
   const ts = Math.floor(Date.now() / 1000);
   copyFileSync(path, `${path}.bak.${ts}`);
 }
+
+export function isAnthropicEndpoint(baseUrl: string): boolean {
+  return baseUrl.includes("/apps/anthropic");
+}