Codex Desktop 0.149 conversations import with an empty transcript

[sunrioa]

What happened

Maka detects a conversation produced by Codex Desktop 0.149 and reports a successful import. However, opening the newly created task displays the empty-conversation state instead of the imported transcript.

The source rollout contains the user prompt, reasoning, and final assistant answer.

Expected behavior:

• The imported task displays the user, reasoning, and assistant messages.
• Each message appears exactly once.
• The task title is derived from the first user message.

Root cause:

Codex Desktop 0.149 writes presentation messages as event_msg records whose payload.type is item_completed. The nested item.type can be UserMessage, Reasoning, or AgentMessage.

CodexSessionAdapter currently recognizes only the legacy user_message, agent_message, and agent_reasoning event shapes. It intentionally ignores presentation-message mirrors in response_item to prevent duplicate imports. Consequently, newer rollouts contribute terminal turn state but no visible transcript messages.

简体中文

Maka 可以检测到 Codex Desktop 0.149 创建的对话，并显示导入成功，但打开新创建的任务后，页面仍然显示空会话状态，没有展示导入的消息。

原始 rollout 文件中实际包含用户消息、推理过程以及最终回复。

预期行为：

• 导入后的任务可以显示用户消息、推理消息和助手回复。
• 每条消息只出现一次。
• 任务标题从第一条用户消息中生成。

问题原因：

Codex Desktop 0.149 使用 payload.type 为 item_completed 的 event_msg 记录保存展示消息，其内部 item.type 可能为 UserMessage、Reasoning 或 AgentMessage。

目前 CodexSessionAdapter 只识别旧版的 user_message、agent_message 和 agent_reasoning 事件。为了避免重复导入，它又会忽略 response_item 中的展示消息镜像，因此新格式的会话最终只导入了结束状态，没有导入可见消息。

How to reproduce

1. Use Codex Desktop 0.149 to create and complete a conversation containing at least one user message and one assistant response.
2. Build and run Maka from the current main branch.
3. Open Settings → Activity → Import tasks.
4. Select Codex and import the conversation.
5. Open the newly imported task.

Actual result:

The task is created, but its transcript is blank and the main panel displays the empty-conversation state.

Expected result:

The imported user, reasoning, and assistant messages are visible exactly once.

简体中文

1. 使用 Codex Desktop 0.149 创建并完成一个至少包含一条用户消息和一条助手回复的对话。
2. 从当前 main 分支构建并启动 Maka。
3. 打开 设置 → 活动 → 导入任务。
4. 选择 Codex 并导入该对话。
5. 打开刚导入的任务。

实际结果：

任务已经创建，但对话内容为空，主页面仍然显示空会话状态。

预期结果：

导入的用户消息、推理过程和助手回复均能正常显示，并且每条只显示一次。

Environment

• Maka screenshot commit: 9a661a1
• Confirmed affected current main commit: 4acfa2693
• Codex Desktop rollout version: 0.149.0-alpha.4.1
• Codex source: vscode
• OS: macOS 26.5.2 (25F84), arm64
• Surface: Desktop, source build
• Node.js: v22.23.1
• npm: 10.9.8

Logs, screenshots, or additional context

• The Codex session adapter was originally introduced in feat: add Codex session adapter #2502.
• This is a compatibility issue with a newer rollout format, rather than a duplicate of the general import architecture tracked in Support source-agnostic external agent session imports #2499.
• A sanitized 10-record rollout fixture reproduces the problem.
• The screenshot below was captured at 9a661a1; the same parsing gap remains on current main at 4acfa2693.