[BUG] Standalone TUI bash tool doesn't stream live output (only shows command + spinner until completion) #34966

Description

When running long-running scripts (e.g. pytest, custom Python test scripts) via the bash tool in opencode's standalone terminal/TUI the interface shows only the command being run and a loading spinner. No live stdout is displayed until the process completes, at which point full output appears at once.

###Expected behavior
Live streaming of stdout/stderr as the command executes, similar to running it directly in a terminal.

Plugins

No response

OpenCode version

1.17.13

Steps to reproduce

• In a plain terminal, run opencode (not embedded in an ACP client)
• Ask it to run a long-running command, e.g. pytest tests/ -v or a custom script like python3 tests/test_walk_forward_final.py
  Observe: only the command line + spinner is shown while it runs; no incremental stdout

Screenshot and/or share link

No response

Operating System

Linux (WSL version)

Terminal

No response

###Additional context:

• Confirmed this isn't a config issue. no stream_output or equivalent setting exists in opencode.json/tui.json
• Found related closed issue [FEATURE]: ACP - enable terminal streaming by including bash outputs in tool updates #13338 and PR feat: ACP - stream bash output and synthetic pending events #14079/fix: ACP both live and load share synthetic pending status preceeding… #14916 ("ACP - stream bash output") . but that work appears scoped to ACP (editor-embedded) sessions specifically, not the standalone CLI/TUI bash tool
• 1 week ago this issue doesn't happen. I've forget what version it is but it should be around v1.17.10 - v1.17.11.