fix: enable colored loguru output for terminal display#189
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loguru's default handler does not emit ANSI color codes in non-TTY or certain terminal environments. Explicitly configure a stderr sink with colorize=True so that log output is colored regardless of the runtime context. When logfire is available, the colorized stderr sink is added alongside the logfire handler so both destinations receive output. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
frostming
reviewed
Apr 27, 2026
Per review feedback, logger.remove() and logger.add(sys.stderr, colorize=True) are always executed regardless of logfire availability, so move them before the try block for cleaner control flow. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
colorize=Truestderr sink for loguru so that log output is colored when displayed in a terminalProblem
loguru's default handler does not emit ANSI color codes in certain terminal environments (e.g., when running through subprocess wrappers or non-TTY stdin contexts). This causes log output to lose color formatting.
Fix
In
_instrument_bub(), explicitly configure loguru with:logger.remove()to clear default handlerslogger.add(sys.stderr, colorize=True)to ensure colored output in terminal displaylogfire.loguru_handler()alongside the colorized sinkThis ensures terminal display always has colored output while preserving logfire integration when available.
Test plan
uv run bub gatewayand verify log output has ANSI colors in terminal🤖 Generated with Claude Code