After sending an image in a Codex CLI conversation, all subsequent requests fail with a JSON deserialization error, leaving the conversation completely stuck.

[GreatYao-Git]

复现步骤

1. 在对话中发送一张图片

2. 继续发送文字消息

3. 每次请求返回错误：Failed to deserialize the JSON body into the target type:
   messages[49]: unknown variant image_url, expected text
   at line 1 column 262721

4. 只能放弃当前对话，新建对话

期望

• 支持 image_url 消息类型，或
• 提供恢复机制（跳过/清理坏消息）

环境

• Codex CLI 桌面版 (Windows)
• 消息类型 image_url 被反序列化器拒绝

[github-actions]

English translation:

Steps to reproduce

1. Send an image in a conversation

2. Continue by sending a text message

3. Every request returns the following error: Failed to deserialize the JSON body into the target type:
   messages[49]: unknown variant image_url, expected text
   at line 1 column 262721

4. The only option is to abandon the current conversation and start a new one

Expected behavior

• Support the image_url message type, or
• Provide a recovery mechanism (skip/remove the invalid message)

Environment

• Codex CLI desktop version (Windows)
• The image_url message type is rejected by the deserializer

[baixingzhu6-tech]

Confirmed on macOS as well.

Environment

• ChatGPT Desktop v26.721.41059
• macOS 26.5.2 (Build 25F84)
• Node v24.14.0

Same error: messages[1]: content should be a string or a list
(column 77051 for user turn, column 21736 for thread title generation)

This confirms the bug is cross-platform (Windows + macOS).

[baixingzhu6-tech]

Confirmed on macOS as well.

Environment

• ChatGPT Desktop v26.721.41059
• macOS 26.5.2 (Build 25F84)
• Node v24.14.0

Same error: messages[1]: content should be a string or a list
(column 77051 for user turn, column 21736 for thread title generation)

This confirms the bug is cross-platform (Windows + macOS).