feat: add OpenAI Codex OAuth plugin (layer 1)

packages/opencode/src/plugin/index.ts

@@ -47,6 +47,21 @@ export namespace Plugin {
       }
     }
 
+    // Load OpenAI Codex auth plugin for ChatGPT Plus/Pro subscribers
+    if (!Flag.OPENCODE_DISABLE_DEFAULT_PLUGINS) {
+      try {
+        log.info("loading plugin", { name: "opencode-openai-codex-auth" })
+        const codexPlugin = await BunProc.install("opencode-openai-codex-auth", "latest")
+        const codexMod = await import(codexPlugin)
+        for (const [_name, fn] of Object.entries<PluginInstance>(codexMod)) {
+          const init = await fn(input)
+          hooks.push(init)
+        }
+      } catch (err) {
+        log.error("failed to load opencode-openai-codex-auth plugin", { error: err })
+      }
+    }
+
     return {
       hooks,
       input,