Desktop crashes with stale Show read during cross-project session navigation

[OpeOginni]

Description

OpenCode Desktop 1.18.10 crashes with Attempting to access a stale value from <Show> during cross-project session navigation. This occurs when opening an existing session from a project for the first time after the app started in another project. It also occurs when switching projects while a new-session tab is open.

An instrumented stack points to the prompt input's agent/model/variant controls in packages/session-ui/src/v2/components/prompt-input/index.tsx. A nested control reads the accessor from an outer non-keyed <Show> after project navigation removes that control.

Related to #39766 and #39704, but this has a distinct source from the titlebar session avatar addressed previously.

Plugins

Not provided

OpenCode version

1.18.10

Steps to reproduce

Existing session path:

1. Launch OpenCode Desktop with project A active.
2. Select project B, which has not been opened since launch.
3. Open an already existing session from project B.
4. The renderer intermittently crashes with Attempting to access a stale value from <Show>.

New-session path:

1. Open a new-session tab in project A.
2. Switch that new-session tab to project B.
3. The renderer intermittently crashes with the same error.

Screenshot and/or share link

Screen.Recording.2026-07-31.at.10.57.32.mov

Instrumented stack:

Error: Attempting to access a stale value from <Show> that could possibly be undefined.
    at narrowedError (.../chunk-YMY2YRT3.js:1490:31)
    at .../chunk-YMY2YRT3.js:1522:40
    at get when (.../packages/session-ui/src/v2/components/prompt-input/index.tsx:301:18)
    at Show.createMemo.name [as fn] (.../chunk-YMY2YRT3.js:1509:49)

Operating System

macOS

Terminal

OpenCode Desktop

[Astro-Han]

I'm hitting this too: OpenCode Desktop 1.18.10 on macOS. The renderer crashed with the same Stale read from <Show>. stack 4 times in ~12 hours, always shortly after app launch (a few seconds to ~7 minutes in), with no user actions logged in between:

• 2026-07-31 03:43 UTC (app started 03:36)
• 2026-07-31 05:56 UTC (~3s after launch)
• 2026-07-31 06:28 UTC (~17s after launch)
• 2026-07-31 16:19 UTC (~3.5 min after launch)

Each is a fatal renderer error in ~/Library/Application Support/ai.opencode.desktop/logs/*/renderer.log:

Error: Stale read from <Show>.
    at castError (oc://renderer/assets/main-DX5ErpZp.js:735:10)
    at handleError (oc://renderer/assets/main-DX5ErpZp.js:748:18)
    at runComputation (oc://renderer/assets/main-DX5ErpZp.js:501:12)
    at updateComputation (oc://renderer/assets/main-DX5ErpZp.js:470:3)
    at runTop (oc://renderer/assets/main-DX5ErpZp.js:566:7)
    at runQueue (oc://renderer/assets/main-DX5ErpZp.js:638:45)
    at completeUpdates (oc://renderer/assets/main-DX5ErpZp.js:594:5)
    at runUpdates (oc://renderer/assets/main-DX5ErpZp.js:584:5)
    at oc://renderer/assets/main-DX5ErpZp.js:473:7

Mine mostly fires right after launch rather than during cross-project navigation, so it may be the session-restore path (#16323 mentioned the same). Can share the full logs if useful.

[joshbla]

I just experienced this same error on the latest OpenCode desktop on macOS as well, switching between projects on the new session tab.