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Custom Context Compaction #13142

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Custom Context Compaction#13142
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contextIssues related to context management (including compaction)enhancementNew feature or request

Description

@saulrichardson
saulrichardson
opened on Feb 28, 2026

What variant of Codex are you using?

Codex App

What feature would you like to see?

You should allow for customizable compaction routines. This could help solve the context window issues people run into when using MCPs. I want my agent to read and have access to all that information but only for while I'm using the MCP. When I'm done it doesn't need to be in the window at all. People should have more control of what gets compacted and how, not to mention when. Context compaction is important for better controllability when it comes to agents. I should be able to see everything that is in the window, specify what parts should be more compacted versus others or make sure that certain tool calls remain the in window, etc.

Additional information

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Activity

  1. saulrichardson
    added
    enhancementNew feature or request
    on Feb 28, 2026

  2. github-actions commented on Feb 28, 2026

    @github-actions
    github-actionsbot
    on Feb 28, 2026 – with GitHub Actions
    Contributor

    Potential duplicates detected. Please review them and close your issue if it is a duplicate.

    Powered by Codex Action

  3. saulrichardson commented on Feb 28, 2026

    @saulrichardson
    saulrichardson
    on Feb 28, 2026
    Author

    duplicate

  4. saulrichardson
    closed this as completedon Feb 28, 2026

  5. saulrichardson commented on Feb 28, 2026

    @saulrichardson
    saulrichardson
    on Feb 28, 2026
    Author

    reopening as this request is specific to codex app while other issues are for cli

  6. saulrichardson
    reopened this on Feb 28, 2026

  7. joshua-bone commented on Mar 23, 2026

    @joshua-bone
    joshua-bone
    on Mar 23, 2026

    +1 PLEASE give us better compaction options

    I routinely run into compaction error loops where I have to discard my whole thread.

  8. etraut-openai
    added
    contextIssues related to context management (including compaction)
    on Apr 2, 2026

  9. mahdikayvan commented on May 10, 2026

    @mahdikayvan
    mahdikayvan
    on May 10, 2026

    @saulrichardson Hey — I felt this issue immediately, and it is very close to the exact pain I’m trying to solve.

    I’m building AgaveCore, and I’d like to let a few early people use it for free while I shape it into something stronger.

    It helps when a coding agent starts to drift, loses important context, or gives you an output you do not fully trust.

    In practice, it works through two habits:

    • tell the agent to remember-progress or remember-this when something important should not be lost
    • use consult-brain when the current task needs more grounded feedback on what to do next

    Over time, as useful journals, decisions, and failures pile up, the product should help the agent make sharper decisions and take better actions with less drift.

    If this sounds relevant, reply here and I’ll send the exact steps. You can also use the email or Telegram on my profile.

    Cheers,
    Mads.

  10. tommedema commented on Sep 13, 2026

    @tommedema
    tommedema
    on Sep 13, 2026

    https://learn.chatgpt.com/docs/config-file/config-reference specifies compact_prompt

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