TL;DR

The issue of seeing "Context compacted" twice during auto compaction in Codex CLI version 0.120.0 may be related to a bug or unexpected behavior in the compaction process.

Guidance

• Verify if this issue persists across different models, such as trying with a different model version like gpt-5.3 or gpt-5.5, to isolate if the problem is model-specific.
• Check if there are any known issues or updates related to context compaction in the Codex CLI version 0.120.0 documentation or release notes.
• Attempt to manually compact the context to see if the issue is specific to auto compaction or if it occurs with manual compaction as well.
• Consider reporting this issue to the Codex CLI support or community forums for further assistance, as the provided information does not yield a straightforward solution.

Notes

The provided information does not specify the expected behavior during context compaction, making it challenging to determine the root cause or provide a definitive fix. The issue might be specific to the combination of the Codex CLI version, the gpt-5.4 model, and the macOS platform.

Recommendation

Apply workaround: Since the issue seems to be related to the auto compaction feature, a temporary workaround could be to disable auto compaction and compact the context manually when necessary, although this does not address the root cause and may not be ideal for all use cases.