TUI freezes on blank screen at startup, no error, requires force-kill

Bug: TUI freezes on blank screen at startup, no error, requires force-kill

Environment

• OpenCode version: 1.18.14 (also reproduced on 1.18.15)
• OS: macOS (Apple Silicon, M1 Max, 32GB)
• Terminal: Terminal.app (default macOS terminal)
• Install method: official install script (curl -fsSL https://opencode.ai/install | bash)

Description

Launching opencode in a normal project directory results in a completely blank screen. The process starts successfully, loads all config files without any error, then hangs silently before rendering the TUI. No error, no panic, no output — it simply never proceeds past initialization. The process must be force-killed (Cmd+Q / killall -9); Ctrl+C does not respond.

Confirmed not caused by:

• Project or global config content (reproduced with config file removed/restored, and with a autoupdate: false key added — no change in behavior)
• Local plugins (reproduced with ~/.config/opencode/plugin and ~/.opencode/plugin moved out of the way)
• Version — same freeze occurs on both 1.18.14 and 1.18.15
• Terminal state — reproduced after a full reset, after quitting and reopening Terminal.app in a fresh, larger window, and after clearing ~/.cache/opencode and ~/.local/share/opencode

Log output (--print-logs)

timestamp=2026-08-08T14:39:07.233Z level=INFO run=d9dbd7f1 message="creating instance" directory=/Users/vevertluisant
timestamp=2026-08-08T14:39:07.234Z level=INFO run=d9dbd7f1 message=fromDirectory directory=/Users/vevertluisant
timestamp=2026-08-08T14:39:07.334Z level=INFO run=d9dbd7f1 message=bootstrapping directory=/Users/vevertluisant
timestamp=2026-08-08T14:39:07.338Z level=INFO run=d9dbd7f1 message=loading path=/Users/vevertluisant/.config/opencode/config.json
timestamp=2026-08-08T14:39:07.339Z level=INFO run=d9dbd7f1 message=loading path=/Users/vevertluisant/.config/opencode/opencode.json
timestamp=2026-08-08T14:39:07.339Z level=INFO run=d9dbd7f1 message=loading path=/Users/vevertluisant/.config/opencode/opencode.jsonc
timestamp=2026-08-08T14:39:07.362Z level=INFO run=d9dbd7f1 message=loading path=/Users/vevertluisant/.opencode/opencode.json
timestamp=2026-08-08T14:39:07.362Z level=INFO run=d9dbd7f1 message=loading path=/Users/vevertluisant/.opencode/opencode.jsonc
[--- nothing logged for 2m33s ---]
timestamp=2026-08-08T14:41:40.980Z level=INFO run=d9dbd7f1 message="disposing all instances"

The last log line before the freeze is the final config-file load (.opencode/opencode.jsonc). Nothing is logged between that line and the forced shutdown 2 minutes 33 seconds later — the hang happens after config loading completes and before any TUI/render-related log line appears.

Steps to reproduce

1. Open Terminal.app on macOS (Apple Silicon)
2. cd ~ (or any project directory)
3. Run opencode
4. Screen stays blank indefinitely; Ctrl+C does nothing; process must be force-killed

Expected behavior

TUI renders normally after config loading, as it has in prior sessions on this same machine/config.

Additional context

• After a forced kill, the terminal is sometimes left emitting raw ANSI mouse-tracking codes (;NNMNN sequences) until printf '\e[?1000l\e[?1002l\e[?1003l\e[?1006l\e[?1049l\e[0m' + reset is run — consistent with known mouse-reporting cleanup issues on force-exit.
• opencode --version and opencode --help work fine, confirming this is isolated to TUI initialization, not the binary itself.