opentui: fatal: undefined is not an object (evaluating 'session().parentID')

[pablonification]

Description

TypeError: undefined is not an object (evaluating 'session().parentID')
    at <anonymous> (src/cli/cmd/tui/routes/session/index.tsx:82:17)
    at runComputation (../../node_modules/.bun/[email protected]/node_modules/solid-js/dist/dev.js:742:22)
    at updateComputation (../../node_modules/.bun/[email protected]/node_modules/solid-js/dist/dev.js:724:3)
    at runTop (../../node_modules/.bun/[email protected]/node_modules/solid-js/dist/dev.js:833:7)
    at runQueue (../../node_modules/.bun/[email protected]/node_modules/solid-js/dist/dev.js:904:42)
    at completeUpdates (../../node_modules/.bun/[email protected]/node_modules/solid-js/dist/dev.js:860:84)
    at runUpdates (../../node_modules/.bun/[email protected]/node_modules/solid-js/dist/dev.js:850:5)
    at setStore (../../node_modules/.bun/[email protected]/node_modules/solid-js/store/dist/dev.js:221:5)
    at navigate (src/cli/cmd/tui/context/route.tsx:18:9)
    at <anonymous> (src/cli/cmd/tui/routes/session/dialog-message.tsx:83:15)...

Plugins

oh my opencode

OpenCode version

1.1.1

Steps to reproduce

1. forking a message
2. suddenly boom

Screenshot and/or share link

No response

Operating System

macOS 26

Terminal

ghostty

[github-actions[bot]]

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

• #6874: opencode attach crashes with 'session().parentID' error in v1.1.1 (regression from #6319)
• #6964: opentui: fatal: undefined is not an object (evaluating 'session().parentID')
• #6867: opentui: fatal: undefined is not an object (evaluating 'session().parentID')

All three issues describe the same error with identical stack traces. Issue #6874 includes root cause analysis and a suggested fix (using optional chaining on 'session()?.parentID').

Feel free to ignore if this addresses a different specific case.