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ANSI.getTerminalSize queries the terminal by writing escape codes and
reading the response from stdin. When stdin is unavailable or at EOF
(common in non-interactive contexts), this causes "hWaitForInput:
end of file" errors.
Additionally, Conduit.streamingProcess returns a stdin handle that
was never being closed, which could cause child processes to block
waiting for input.
Fixes: - Catch IOException in detectTerminal when getTerminalSize
fails - Close subprocess stdin handle immediately after spawn -
Fallback to default terminal size (80x24) when detection fails
This unblocks all bild commands that were failing with stdin errors.
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- Remove BILD_OUTPUT_MODE environment variable - Simplify to 2
modes: MultiLine (≥80 cols) and SingleLine (<80) - Use existing
--loud flag to disable concurrent UI entirely - When --loud: show
all compiler output line-by-line (for debugging) - When not --loud:
adaptive concurrent UI based on terminal width
This is simpler and uses the existing --loud flag instead of adding
new configuration. The --loud flag was already meant for debugging,
so it makes sense to use it to show all output.
Note: Omni/Bild.nix updated to include new Omni/Log/Terminal.hs module.
Blocked by: stdin bug (see _/llm/STDIN_BUG.md) - cannot test build yet.
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- Add Omni/Log/Terminal module to detect terminal capabilities -
Implement 3 output modes: RichMultiLine (≥80 cols), SingleLine
(40-79),
SimpleFallback (<40 or dumb terminals)
- Terminal width auto-detection via System.Console.ANSI.getTerminalSize
- Text truncation with ellipsis to prevent line wrapping - Manual
override via BILD_OUTPUT_MODE env var (simple|single|rich|auto)
Fixes UI corruption on small terminals (mobile SSH, narrow windows).
Wide terminals keep existing multi-line behavior but with truncation.
Design doc: _/llm/CONCURRENT_LOG_DESIGN.md
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