opentui: fatal: undefined is not an object (evaluating 'local.agent.current().name') #9332

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1. jiurang

   added

   bugSomething isn't workingSomething isn't working

   on Jan 19, 2026
2. github-actions

   assigned

   rekram1-node

   on Jan 19, 2026
3. 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 Jan 19, 2026
4. github-actions commented on Jan 19, 2026

   

   github-actionsBot

   on Jan 19, 2026 – with GitHub Actions

   Contributor

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

   • opentui: fatal: undefined is not an object (evaluating 'local.agent.current().name') #9244: Same error - 'local.agent.current().name' undefined (OPEN)
   • opentui: fatal: undefined is not an object (evaluating 'local.agent.current().name') #9266: Same error - 'local.agent.current().name' undefined (CLOSED)
   • opentui: fatal: undefined is not an object (evaluating 'local.agent.current().name') #9159: Same error - 'local.agent.current().name' undefined (OPEN)
   • opentui: fatal: undefined is not an object (evaluating 'local.agent.current().name') #8018: Same error - 'local.agent.current().name' undefined (CLOSED)

   Feel free to ignore if none of these address your specific case.
5. aliyten commented on Jan 19, 2026

   

   aliyten

   on Jan 19, 2026

   More actions

   I also encountered this problem and reported the error as follows:

   Please report an issue. Copy issue URL (exception info pre-filled) Successfully copied

   A fatal error occurred! Reset TUI Exit

   TypeError: undefined is not an object (evaluating 'local.agent.current().name')
   at (src/cli/cmd/tui/component/prompt/index.tsx:841:75)
   at (../../node_modules/.bun/@OpenTui+solid@0.1.74+897ebc1644d3edd0/node_modules/@opentui/solid/index.js:148:62)
   at runComputation (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/dist/dev.js:742:22)
   at updateComputation (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/dist/dev.js:724:3)
   at runTop (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/dist/dev.js:833:7)
   at runUserEffects (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/dist/dev.js:928:18)
   at runUpdates (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/dist/dev.js:849:17)
   at completeUpdates (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/dist/dev.js:900:17)
   at runUpdates (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/dist/dev.js:850:5)
   at setStore (../../node_modules/.bun/solid-js@1.9.10/node_modules/solid-js/store/dist/dev.js:221:5)
   at processTicksAndRejections (native:7:39)
6. rekram1-node commented on Jan 21, 2026

   

   rekram1-node

   on Jan 21, 2026

   Contributor

   More actions

   Duplicate of #7918
7. rekram1-node

   marked this as a duplicate of Crash when local.agent.current() returns undefined during startup/auth #7918 on Jan 21, 2026
8. rekram1-node

   closed this as completedon Jan 21, 2026
9. Skeptomenos commented on Jan 26, 2026

   

   Skeptomenos

   on Jan 26, 2026

   More actions

   Additional data point: oh-my-opencode plugin with disabled agents

   Environment:

   • OpenCode: 1.1.36
   • OS: macOS (darwin)
   • Plugin: oh-my-opencode@latest

   Trigger:

   • Occurs intermittently during regular prompts (not startup)
   • Happens in both new sessions and existing sessions
   • No specific action reproduces it consistently - appears random

   Stack trace:

   TypeError: undefined is not an object (evaluating 'agent.name')
       at createUserMessage (src/session/prompt.ts:832:14)
   

   Relevant config pattern:
   I have oh-my-opencode installed but with all custom agents disabled:

   {
     "agents": {
       "sisyphus": { "disable": true },
       "prometheus": { "disable": true },
       "oracle": { "disable": true },
       "librarian": { "disable": true },
       "explore": { "disable": true },
       "frontend-ui-ux-engineer": { "disable": true },
       "document-writer": { "disable": true },
       "multimodal-looker": { "disable": true },
       "metis": { "disable": true },
       "momus": { "disable": true },
       "atlas": { "disable": true }
     },
     "sisyphus_agent": { "disabled": true }
   }

   Hypothesis:
   The plugin may be registering agent names that get referenced somewhere (session state? internal delegate_task calls?) but since the agents are disabled, Agent.get() returns undefined.

   Missing guard location:
   Looking at the code, src/session/prompt.ts:828 lacks a guard:

   const agent = await Agent.get(input.agent ?? (await Agent.defaultAgent()))
   // No check for undefined before accessing agent.name on line 837

   Compare to other locations that DO have guards:

   • src/tool/task.ts:58 - throws helpful error
   • src/cli/cmd/run.ts:235 - has guard
   • src/cli/cmd/debug/agent.ts:37 - has guard