Claude Code Changelogs Recent Archive Source-level · unofficial Updates
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Claude Code · Source-level changelog

Version 2.1.54

This is a targeted patch release that fixes file handling on Windows. Three separate file-open operations now use portable string mode flags instead of POSIX numeric constants, resolving potential issues with command output logging and task output on Windows.

Package @anthropic-ai/claude-code Diff v2.1.53 → v2.1.54
0
Features & Changes
3
Bug Fixes
0
In Development
0
Env Vars / Flags

Bug Fixes

3 items
  • Fixed file open operations on Windows for bash command output: The bash command runner now opens its output log file using the portable string flag "w" (write) on Windows, instead of the bitwise POSIX flags O_WRONLY | O_CREAT | O_TRUNC, which may not behave correctly on Windows. Non-Windows platforms continue to use the POSIX flags with O_NOFOLLOW for symlink safety. (search for process.platform === "win32" in pj1 at line ~269290)
  • Fixed file open operations on Windows for task output appending: The task output writer class now opens files using the portable string flag "a" (append) on Windows, instead of the bitwise POSIX flags O_WRONLY | O_APPEND | O_CREAT. Previously, there was no Windows-specific handling in this code path. (search for process.platform === "win32" in class z31 at line ~130992)
  • Fixed file open operations on Windows for task output creation: The task output file creation function now uses the portable string flag "wx" (exclusive write) on Windows, instead of the bitwise POSIX flags O_WRONLY | O_CREAT | O_EXCL. This ensures exclusive-create semantics work correctly on Windows. (search for process.platform === "win32" in bq8 at line ~131075)