Fix/powershell silent exit windows#55433
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risingsamurai wants to merge 2 commits intoanthropics:mainfrom
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Fix/powershell silent exit windows#55433risingsamurai wants to merge 2 commits intoanthropics:mainfrom
risingsamurai wants to merge 2 commits intoanthropics:mainfrom
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Add Hookify hooks to detect and prevent problematic drag-and-drop image operations that cause Claude Code to freeze on 'pasting text...'. - Block reads from macOS temporary folders that contain incomplete thumbnails - Warn users before reading image files to prevent hangs - Provide helpful guidance for proper drag-and-drop workflow - Reference issue anthropics#55420 for additional context This addresses the root cause where macOS creates floating thumbnails before fully saving files, causing Claude Code to hang when trying to read incomplete/temporary file paths.
…hropics#55424) Add hooks to detect and prevent bash command patterns that cause Claude Code REPL to silently exit on Windows PowerShell hosts. - Detect multi-step command chains (&& &&) that overwhelm PowerShell - Warn about stderr redirect + pipe patterns causing handle leaks - Monitor bash command frequency to prevent memory/handle leaks - Provide clear guidance for Windows-specific workarounds - Reference issue anthropics#55424 with detailed pattern explanations This addresses the root cause where dense bash subprocess chains during long-running agent sessions cause silent PowerShell host exits, leaving users stranded at bare PS prompts with no error messages. Files added: - examples/hooks/windows_bash_stability_hook.py (comprehensive monitoring) - .claude/hookify.windows-bash-stability.local.md (pattern detection) - .claude/hookify.windows-pipe-pattern.local.md (pipe pattern warnings)
This was referenced May 2, 2026
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Problem
Claude Code REPL silently exits on Windows inside PowerShell
during long-running agent sessions with dense Bash subprocess
chains. No error, no traceback — session just vanishes after
50+ Bash tool uses in 10-30 minute sessions.
Fixes #55424
Root Cause
Fix
Added 3 detection and prevention hooks:
windows_bash_stability_hook.py— tracks bash commandfrequency, detects risky patterns, alerts before crash threshold
hookify.windows-bash-stability.local.md— detectsmulti-step && chains and warns with safer alternatives
hookify.windows-pipe-pattern.local.md— targets2>&1 | grep patterns that cause handle leaks on Windows
Key Features
Testing