The context monitor and statusline hooks wait for stdin 'end' event
before processing. On some platforms (Windows/Git Bash), the stdin pipe
may not close cleanly, causing the script to hang until Claude Code's
hook timeout kills it — surfacing as "PostToolUse:Read hook error" after
every tool call. Add a 3-second timeout that exits silently if stdin
doesn't complete, preventing the noisy error messages.
Closes#775
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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