diff --git a/action.yml b/action.yml
index 79b490f..d4c2888 100644
--- a/action.yml
+++ b/action.yml
@@ -1,11 +1,10 @@
-name: 'Gitea Composite Template'
-description: 'Gitea Composite 範本'
+name: 'Codex CLI'
+description: '安裝 Codex CLI 工具'
 author: 'Jeffery'
 inputs:
-  message:
-    description: '輸入訊息'
-    required: false
-    default: 'Hello, World!'
+  oauth:
+    description: '透過 OAuth 登入 ChatGPT 產生驗證檔，經過 base64 編碼'
+    required: true
 outputs:
   message:
     description: '輸出訊息'
@@ -13,10 +12,12 @@ outputs:
 runs:
   using: 'composite'
   steps:
-  - name: Exchange
-    id: exchange
+  - name: Setup Codex
     env:
-      MESSAGE: ${{ inputs.message }}
-    run: |
-      echo "message=$MESSAGE" >> "$GITHUB_OUTPUT"
+      CODEX_NON_INTERACTIVE: 1
+    run: curl -fsSL https://chatgpt.com/codex/install.sh | sh
     shell: bash
+  - name: Login Codex with OAuth
+    env:
+      OAUTH: ${{ inputs.oauth }}
+    run: echo $OAUTH | base64 --decode > ~/.codex/auth.json
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