opentui: fatal: undefined is not an object (evaluating 'color.buffer') #4719

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1. shahshlok

   added

   bugSomething isn't workingSomething isn't working

   on Nov 25, 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 25, 2025
3. github-actions commented on Nov 25, 2025

   

   github-actionsBot

   on Nov 25, 2025 – with GitHub Actions

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   This issue is a duplicate of an existing issue. Please check:

   • opentui: fatal: undefined is not an object (evaluating 'color.buffer') #4648: opentui: fatal: undefined is not an object (evaluating 'color.buffer')

   Both issues report the identical error when pressing tab to switch agents, particularly with custom agent configurations. Your report even mentions issue #4648 explicitly. Consider consolidating discussion there to help the maintainers track the problem more effectively.
4. rekram1-node

   self-assigned this

   on Nov 25, 2025
5. rekram1-node commented on Nov 25, 2025

   

   rekram1-node

   on Nov 25, 2025

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   ahh okay
6. rekram1-node commented on Nov 25, 2025

   

   rekram1-node

   on Nov 25, 2025

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   @shahshlok can you show me opencode debug config
7. shahshlok commented on Nov 25, 2025

   

   shahshlok

   on Nov 25, 2025

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   @shahshlok can you show me opencode debug config

   Sure,

     ~ ❯ opencode debug config
   {
     "$schema": "https://opencode.ai/config.json",
     "tui": {
       "scroll_speed": 1
     },
     "agent": {
       "tutor": {
         "prompt": "You are a friendly and insightful coding tutor.  \nYour job is to **teach, ask, and guide**, not to code.  \nYou never modify files or run commands.  \nYou pause often to check the user’s familiarity before moving forward.\n\n### Core Loop\n1. **Teach** – Explain the concept simply with analogies and tiny pseudo code examples.  \n2. **Ask** – Pause and ask one conceptual question to gauge understanding.  \n   - Do not give a plan or coding checklist until the user shows clear comprehension.  \n3. **Plan** – Once they’re ready, outline a concise, actionable checklist for implementation.  \n4. **Task** – Assign one small, focused exercise. Provide hints only, never full code.  \n5. **Review** – Use a hybrid of checklist and short narrative feedback. Encourage, correct, and highlight improvements.\n\n### Behavior and Style\n- Tone: encouraging, clear, slightly creative — a buddy mentor, not a strict teacher.  \n- Always teach before suggesting a plan.  \n- Adapt difficulty dynamically: small → moderate → project-linked.  \n- Ask permission before web searches (keep citations minimal).  \n- Use `read`, `grep`, and `glob` to reference code context, never to edit.  \n- Show short snippets (5–10 lines max) and point to exact paths for deeper review.  \n- Never access sensitive files like `.env`, keys, or secrets.  \n- If the user struggles, reteach gently with new examples or analogies.\n\n### Progress Tracking\n- Use a global learning log at `~/.config/opencode/learning_log.md`.  \n- Read-only: you never write to it.  \n- At each session start, read and summarize the last 3 entries (if available).  \n- After every review, remind the user to append one line:\n  `YYYY-MM-DD | topic | what I learned | sticking point | next step`\n\n### Refusal Template\n> I can’t edit or write code for you, but here’s a plan you can follow and a small hint to guide your approach.",
         "tools": {
           "write": false,
           "edit": true,
           "patch": false,
           "bash": true,
           "read": true,
           "grep": true,
           "glob": true,
           "todoread": true,
           "webfetch": true
         },
         "description": "Global, read-only Tutor that teaches concepts, checks understanding, and helps you plan and build when ready.",
         "mode": "primary",
         "permission": {
           "edit": "ask",
           "bash": "ask",
           "webfetch": "ask"
         },
         "name": "tutor"
       }
     },
     "mode": {},
     "plugin": [],
     "command": {},
     "username": "shlokshah",
     "keybinds": {
       "leader": "ctrl+x",
       "app_exit": "ctrl+c,ctrl+d,<leader>q",
       "editor_open": "<leader>e",
       "theme_list": "<leader>t",
       "sidebar_toggle": "<leader>b",
       "status_view": "<leader>s",
       "session_export": "<leader>x",
       "session_new": "<leader>n",
       "session_list": "<leader>l",
       "session_timeline": "<leader>g",
       "session_share": "none",
       "session_unshare": "none",
       "session_interrupt": "escape",
       "session_compact": "<leader>c",
       "messages_page_up": "pageup",
       "messages_page_down": "pagedown",
       "messages_half_page_up": "ctrl+alt+u",
       "messages_half_page_down": "ctrl+alt+d",
       "messages_first": "ctrl+g,home",
       "messages_last": "ctrl+alt+g,end",
       "messages_copy": "<leader>y",
       "messages_undo": "<leader>u",
       "messages_redo": "<leader>r",
       "messages_toggle_conceal": "<leader>h",
       "model_list": "<leader>m",
       "model_cycle_recent": "f2",
       "model_cycle_recent_reverse": "shift+f2",
       "command_list": "ctrl+p",
       "agent_list": "<leader>a",
       "agent_cycle": "tab",
       "agent_cycle_reverse": "shift+tab",
       "input_clear": "ctrl+c",
       "input_forward_delete": "ctrl+d",
       "input_paste": "ctrl+v",
       "input_submit": "return",
       "input_newline": "shift+return,ctrl+j",
       "history_previous": "up",
       "history_next": "down",
       "session_child_cycle": "<leader>right",
       "session_child_cycle_reverse": "<leader>left",
       "terminal_suspend": "ctrl+z"
     }
   }
8. shahshlok commented on Nov 25, 2025

   

   shahshlok

   on Nov 25, 2025

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   @rekram1-node one more thing, tab allows me to switch from Build to Plan but then pressing tab after that does not switch, it gets frozen on Plan mode.

   I am happy to give you any data that you want to help you better understand the issue
9. shahshlok commented on Nov 25, 2025

   

   shahshlok

   on Nov 25, 2025

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   I hope this helps

   Screen.Recording.2025-11-24.at.10.47.48.PM.mp4
10. shahshlok commented on Nov 27, 2025

    

    shahshlok

    on Nov 27, 2025

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    @rekram1-node I think I found the issue, i had a custom theme file which mimicked the VSCode Modern Theme. Upon removing that custom theme, everything seems to be working fine
11. rekram1-node commented on Dec 3, 2025

    

    rekram1-node

    on Dec 3, 2025

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    @shahshlok any chance u can send the custom theme, want to make sure we handle this gracefully
12. thdxr

    closed this as completedon Mar 25, 2026