TUI crash: U.split is not a function. (In 'U.split("/")', 'U.split' is undefined)

Description

TUI crashes on startup with U.split is not a function. Happens intermittently when launching with -m <provider>/<model> pointed at a custom (non-catalog) @ai-sdk/openai-compatible provider defined in opencode.json — not on every launch, roughly 1 in a few tries. Restarting (r on the crash screen) usually gets a clean session.

opencode run -m <same provider>/<same model> (headless) never reproduces this — only the interactive TUI.

Config provider block in use:

{
  "provider": {
    "ollama": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "Ollama (local)",
      "options": { "baseURL": "http://localhost:11434/v1", "apiKey": "ollama" },
      "models": {
        "qwen2.5-coder:7b": { "name": "Qwen2.5 Coder 7B", "tools": true },
        "qwen3.5:9b": { "name": "Qwen3.5 9B", "tools": true }
      }
    }
  }
}

I traced this as far as I could in the source without shipped sourcemaps: the stack trace's provider → children → nested createMemo shape points at packages/tui/src/context/local.tsx's parseModel() / fallbackModel memo, but every call site I found there (args.model, sync.data.config.model) is already guarded with a truthy-string check before .split("/"), so I couldn't pin the exact unguarded call from source alone. Possibly related to the unguarded-split pattern already tracked in #43662 (that one's in the desktop packages/app, not packages/tui, so likely a distinct instance of the same class of bug).

Plugins

None (--pure not used, but no plugins configured)

OpenCode version

1.18.30

Steps to reproduce

1. Configure a custom @ai-sdk/openai-compatible provider in opencode.json (e.g. Ollama) with 2+ models.
2. Launch opencode -m <provider>/<model> repeatedly from a bash alias.
3. Crash occurs intermittently on startup, before the prompt renders.

Operating System

Linux 7.2.3-ogc4.1.fc44.x86_64 (x64)

Terminal

xterm-256color

Stack trace

TypeError: U.split is not a function. (In 'U.split("/")', 'U.split' is undefined)
    at _i (/$bunfs/root/chunk-wt1x2xyt.js:2:7922)
    at <anonymous> (/$bunfs/root/chunk-wt1x2xyt.js:2:9889)
    at mJ (/$bunfs/root/chunk-zwn33msg.js:2:9650)
    at p (/$bunfs/root/chunk-zwn33msg.js:2:9431)
    at sJ (/$bunfs/root/chunk-zwn33msg.js:2:8440)
    at b (/$bunfs/root/chunk-wt1x2xyt.js:2:8427)
    at <anonymous> (/$bunfs/root/chunk-wt1x2xyt.js:2:10336)
    at mJ (/$bunfs/root/chunk-zwn33msg.js:2:9650)
    at p (/$bunfs/root/chunk-zwn33msg.js:2:9431)
    at F (/$bunfs/root/chunk-zwn33msg.js:2:3993)
    at A (/$bunfs/root/chunk-wt1x2xyt.js:2:10304)
    at init (/$bunfs/root/chunk-wt1x2xyt.js:2:12771)
    at provider (/$bunfs/root/chunk-cvwha8nb.js:2:116982)
    at b (/$bunfs/root/chunk-zwn33msg.js:2:6673)
    at children (/$bunfs/root/chunk-cvwha8nb.js:2:117118)
    at <anonymous> (/$bunfs/root/chunk-zwn33msg.js:2:14138)
    at mJ (/$bunfs/root/chunk-zwn33msg.js:2:9650)
    at p (/$bunfs/root/chunk-zwn33msg.js:2:9431)
    at F (/$bunfs/root/chunk-zwn33msg.js:2:3993)
    at vJ (/$bunfs/root/chunk-zwn33msg.js:2:7957)
    at b (/$bunfs/root/chunk-zwn33msg.js:2:6673)
    at <anonymous> (/$bunfs/root/chunk-zwn33msg.js:2:14080)
    at mJ (/$bunfs/root/chunk-zwn33msg.js:2:9650)
    at p (/$bunfs/root/chunk-zwn33msg.js:2:9431)
    at dJ (/$bunfs/root/chunk-zwn33msg.js:2:3567)
    at <anonymous> (/$bunfs/root/chunk-zwn33msg.js:2:14072)
    at b (/$bunfs/root/chunk-zwn33msg.js:2:6673)
    at <anonymous> (/$bunfs/root/chunk-zwn33msg.js:2:19878)
    at mJ (/$bunfs/root/chunk-zwn33msg.js:2:9650)
    at p (/$bunfs/root/chunk-zwn33msg.js:2:9431)
    at ZJ (/$bunfs/root/chunk-zwn33msg.js:2:11057)
    at rJ (/$bunfs/root/chunk-zwn33msg.js:2:11931)
    at yZ (/$bunfs/root/chunk-zwn33msg.js:2:11333)
    at w (/$bunfs/root/chunk-zwn33msg.js:2:11238)
    at e (/$bunfs/root/chunk-cvwha8nb.js:2:113598)
    at <anonymous> (/$bunfs/root/chunk-cvwha8nb.js:2:120322)
    at processTicksAndRejections (native:7:39)