How to customize the compact command to use different model

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Hi, was wondering how to customize the /compact command so it uses lets say gemini instead of the default (claude or gpt) model.
Thought it would be possible to update using a custom /command/compact.md or a compact command in the config.json, but all that did was add a new command.

So asking for help, how to update system built-in commands to use a different model, without having to manually switch each time.

This issue might be a duplicate of existing issues. Please check:

[FEATURE]: /compact should be configurable to use OpenAI Responses API 'compaction' #5200: [FEATURE]: /compact should be configurable to use OpenAI Responses API 'compaction' - requests ability to configure compact to use different models
feat(compact): override compact default model and prompt #2465: feat(compact): override compact default model and prompt - addresses overriding compact model and prompt (CLOSED as completed)
[FEATURE]: Ability to specify different model to use for compaction #6976: [FEATURE]: Ability to specify different model to use for compaction - requests ability to use lighter models for compaction (CLOSED)

Feel free to ignore if none of these address your specific case.

Using this works:

  "agent": {
    "compaction": {
      "model": "..."
    }
  },

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How to customize the compact command to use different model #7980

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How to customize the compact command to use different model #7980

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github-actions commented on Jan 12, 2026

m10rten commented on Jan 12, 2026

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