Opencode freezes when pressing option + left arrow key on MacBook with high CPU usage #2688

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1. rekram1-node

   assigned

   adamdotdevin

   on Sep 19, 2025
2. rekram1-node commented on Sep 19, 2025

   

   rekram1-node

   on Sep 19, 2025

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   That's weird I can replicate, this may be fixed once opentui migration is complete
3. aemr3 commented on Sep 19, 2025

   

   aemr3

   on Sep 19, 2025

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   When I'm in opencode, and I press option + left arrow key, opencode freezes and I notice this process that spikes:

   yes I have experienced it as well, I'm using shift + arrow keys without any problems.

   {
     "keybinds": {
       "session_child_cycle": "shift+right",
       "session_child_cycle_reverse": "shift+left"
     }
   }
   
4. lloydrichards commented on Sep 29, 2025

   

   lloydrichards

   on Sep 29, 2025

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   Just ran into the same issue since v0.13.4 (see #2854) but also noticed that it only had this issue with Ghostty (1.2.0). Will close my other issue and follow this one for a solution 🤞
5. lloydrichards commented on Oct 1, 2025

   

   lloydrichards

   on Oct 1, 2025

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   in v0.13.7, I'm no longer having this issue

   😕React with 😕1Reacted by Towry Wang

   ❤️React with ❤️1Reacted by Hani
6. towry commented on Oct 24, 2025

   

   towry

   on Oct 24, 2025 · Hidden as outdated

   Last edited by towry

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7. pedropombeiro commented on Feb 7, 2026

   

   pedropombeiro

   on Feb 7, 2026

   Last edited by pedropombeiro

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   I've traced the root cause of this issue to the @opentui/core package's stdin buffer handling.

   Root Cause

   In packages/core/src/lib/stdin-buffer.ts, the isCompleteSequence function doesn't handle double-escape sequences (like \x1b\x1b[D for Option+Left). When the terminal sends this sequence:

   1. The function sees it starts with ESC (\x1b)
   2. afterEsc = \x1b[D (starts with ESC, not [)
   3. None of the pattern checks match
   4. Falls through to return "complete" - treating \x1b\x1b as complete
   5. The remaining [D is emitted as literal text

   This is why users see [D or [C printed instead of cursor movement.

   Filed Upstream

   I've filed an issue with a proposed fix in the opentui repo:
   anomalyco/opentui#644
8. github-actions commented on Apr 9, 2026

   

   github-actionsBot

   on Apr 9, 2026 – with GitHub Actions

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   To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.
9. github-actions

   closed this as completedon Apr 9, 2026