System Theme no longer works after v1.0.0 #3688

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1. malhashemi

   added

   bugSomething isn't workingSomething isn't working

   on Nov 1, 2025
2. github-actions

   added

   opentuiThis relates to changes in v1.0, now that opencode uses opentuiThis relates to changes in v1.0, now that opencode uses opentui

   on Nov 1, 2025
3. github-actions

   assigned

   thdxr

   on Nov 1, 2025
4. paradise-runner commented on Nov 1, 2025

   

   paradise-runner

   on Nov 1, 2025

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   Also getting this issue, seeing some crazy rapid development so expect this to be fixed soon!
5. thdxr commented on Nov 1, 2025

   

   thdxr

   on Nov 1, 2025

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   we're working on it this week

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6. shuv1337

   marked Implement System Theme Support in OpenTUI #3731 as a duplicate of this issue on Nov 2, 2025
7. thdxr

   marked [FEATURE]: "system" theme to use existing terminal palette #3644 as a duplicate of this issue on Nov 2, 2025
8. rekram1-node

   marked system theme unavailable in v1.0.15 #3830 as a duplicate of this issue on Nov 3, 2025
9. ahokinson commented on Nov 4, 2025

   

   ahokinson

   on Nov 4, 2025

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   Not sure if this is related, but after upgrading to 1.0, my custom theme I had defined no longer shows up in the selectable themes either. I don't see any errors like I used to if the theme wasn't available. So it seems like it knows about the file but can't use it. Did theming change with the upgrade?

   https://github.com/ahokinson/dotfiles/blob/develop/common/opencode/themes/catppuccin-frappe.json

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10. ssoteloserrano commented on Nov 6, 2025

    

    ssoteloserrano

    on Nov 6, 2025

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    Same problem with my custom theme not being available after update to 1.0.34

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11. spacetime-labs commented on Nov 6, 2025

    

    spacetime-labs

    on Nov 6, 2025

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    Same here at version: 1.0.36

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12. thdxr commented on Nov 6, 2025

    

    thdxr

    on Nov 6, 2025 – with Linear

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    custom themes aren't loaded yet - will get to it tomorrow

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13. thdxr commented on Nov 6, 2025

    

    thdxr

    on Nov 6, 2025

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    SYSTEM THEME DONE

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14. thdxr

    closed this as completedon Nov 6, 2025
15. cwegener commented on Nov 6, 2025

    

    cwegener

    on Nov 6, 2025

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    Just upgraded .. am I doing something wrong. I can't see it show up in the list.

    

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17. rekram1-node commented on Nov 26, 2025

    

    rekram1-node

    on Nov 26, 2025

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    @danmondra we are waiting for the next tmux release and it will be fixed. The fix was already merged in but they didn't release it yet

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18. offlinehacker commented on Nov 28, 2025

    

    offlinehacker

    on Nov 28, 2025

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    Can confirm it's working with tmux 3.6 from homebrew 🚀

    

    When you change from dark/bright mode you still need to detach/attach to tmux session and restart opencode, but that's minor inconvenience.
19. noirbizarre commented on Nov 30, 2025

    

    noirbizarre

    on Nov 30, 2025

    Last edited by noirbizarre

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    For me it worked with tmux 3.6 on the 1.0.119 and then with the 1.0.120, the system theme disappeared again (I tried all versions from 1.0.122 to 1.0.119, system theme is only available in 1.0.119 on tmux 3.6).
    Between both, OpenTUI has been upgraded from 0.1.50 to 0.1.51 and contains anomalyco/opentui#354 which seem to be the cause (I did not had time to try reverting the commit to confirm).
20. rekram1-node commented on Nov 30, 2025

    

    rekram1-node

    on Nov 30, 2025

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    ^^ btw @kommander
21. kommander commented on Nov 30, 2025

    

    kommander

    on Nov 30, 2025 – with Linear

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    That's odd, that change seems to have fixed it for others. Maybe that worked for 3.5 but not 3.6 anymore. I'll check.
22. kommander

    assigned

    kommander

    and unassigned

    thdxr

    on Nov 30, 2025
23. seaweeduk commented on Nov 30, 2025

    

    seaweeduk

    on Nov 30, 2025

    Last edited by seaweeduk

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    I dont use tmux but background transparency in the system theme hasn't worked since this was reverted, is it still on the radar?

    ab07229
24. malhashemi commented on Nov 30, 2025

    

    malhashemi

    on Nov 30, 2025

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    I dont use tmux but background transparency in the system theme hasn't worked since this was reverted, is it still on the radar?

    ab07229

    Yeah man I hate that it is removed, system for sure should get transparent background, I tried to fix it with #4879 plus add hot reloading (I hate having to restart opencode every time my dynamic theme changes) but not sure if it ever going to be merged
25. noirbizarre commented on Dec 1, 2025

    

    noirbizarre

    on Dec 1, 2025

    Last edited by noirbizarre

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    Transparent background with system theme was working with 1.0.119 and tmux 3.6.
    My hypothesis is that OSC4 palette request was working fine with tmux 3.6 but the escaping added in OpenTUI if for tmux 3.5 and doesn't work with with 3.6 because it has now native support for it.
    I have submited a fix to submit to OpenTUI and I get system theme back in tmux 3.6: anomalyco/opentui#373

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26. kommander

    added a commit that references this issue on Dec 2, 2025

    fix(OSC4): tmux 3.6 has native support for OSC4 and should not be wra…

    ...

    This issue will close once commit b51f722 is merged into the 'main' branch.

    b51f722
27. arthur404dev commented on Dec 3, 2025

    

    arthur404dev

    on Dec 3, 2025

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    Should add here aswell but Zellij has an odd behavior on OSC0 and OSC1, clearing the zellij cache works but might be an incovenience for anyone using plugins. Just reporting to put under the radar
28. john-persson-polestar commented on Jan 7, 2026

    

    john-persson-polestar

    on Jan 7, 2026

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    Thanks to the comments above I was able to get the system theme back by updating tmux from next-3.6 to next-3.7.

    Any update on background transparency?

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29. msmps

    added a commit that references this issue on Jan 8, 2026

    fix(OSC4): tmux 3.6 has native support for OSC4 and should not be wra…

    ...

    This issue will close once commit c1f8ff4 is merged into the 'main' branch.

    c1f8ff4
30. bric3 commented on Sep 1, 2026

    

    bric3

    on Sep 1, 2026

    Last edited by bric3

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    I'm using opencode within the IntelliJ IDEA terminal, but the system doesn't show up.
    This terminal supports true color, but does export COLORTERM, but even forcing it. Opencode just doesn't reveal the system theme.

    After exploring the topic, it seems that opencode is using OSC 4, 10 and 11 to read colors from the emulator. And it happens that the IntelliJ terminal do not support OSC 4 (as of 2026.2.1).

    https://youtrack.jetbrains.com/issue/IJPL-254468/Support-for-Terminal-OSC-4

    There's by the way a PR on the old JediTerm for that JetBrains/jediterm#327, but given the folk at Jetbrains are migrating toward the reworked terminal that use a different rendering engine, a different PR should be done.