fix: Windows hook execution for Claude Code 2.1.x #331
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Add .gitattributes to enforce LF line endings for shell scripts, preventing bash errors like "/usr/bin/bash: line 1: : command not found" when scripts are checked out on Windows with CRLF. Fixes #317 (SessionStart hook fails due to CRLF line endings) Files converted: - hooks/session-start.sh - lib/brainstorm-server/start-server.sh - lib/brainstorm-server/stop-server.sh - lib/brainstorm-server/wait-for-feedback.sh - skills/systematic-debugging/find-polluter.sh Co-Authored-By: Claude Opus 4.5 <[email protected]>
Claude Code 2.1.x changed the Windows execution model: it now auto-detects .sh files in hook commands and prepends "bash " automatically. This broke the polyglot wrapper because: Before: "run-hook.cmd" session-start.sh (wrapper executes) After: bash "run-hook.cmd" session-start.sh (bash can't run .cmd) Changes: - hooks.json now calls session-start.sh directly (Claude Code handles bash) - Added deprecation comment to run-hook.cmd explaining the change - Updated RELEASE-NOTES.md Fixes #317, #313, #275, #292 Co-Authored-By: Claude Opus 4.5 <[email protected]>
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This was referenced Jan 22, 2026
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obra
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Jan 23, 2026
* fix: convert shell scripts from CRLF to LF line endings Add .gitattributes to enforce LF line endings for shell scripts, preventing bash errors like "/usr/bin/bash: line 1: : command not found" when scripts are checked out on Windows with CRLF. Fixes #317 (SessionStart hook fails due to CRLF line endings) Files converted: - hooks/session-start.sh - lib/brainstorm-server/start-server.sh - lib/brainstorm-server/stop-server.sh - lib/brainstorm-server/wait-for-feedback.sh - skills/systematic-debugging/find-polluter.sh Co-Authored-By: Claude Opus 4.5 <[email protected]> * fix: update Windows hook execution for Claude Code 2.1.x Claude Code 2.1.x changed the Windows execution model: it now auto-detects .sh files in hook commands and prepends "bash " automatically. This broke the polyglot wrapper because: Before: "run-hook.cmd" session-start.sh (wrapper executes) After: bash "run-hook.cmd" session-start.sh (bash can't run .cmd) Changes: - hooks.json now calls session-start.sh directly (Claude Code handles bash) - Added deprecation comment to run-hook.cmd explaining the change - Updated RELEASE-NOTES.md Fixes #317, #313, #275, #292 Co-Authored-By: Claude Opus 4.5 <[email protected]> --------- Co-authored-by: Claude Opus 4.5 <[email protected]>
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obra
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Jan 25, 2026
* fix: convert shell scripts from CRLF to LF line endings Add .gitattributes to enforce LF line endings for shell scripts, preventing bash errors like "/usr/bin/bash: line 1: : command not found" when scripts are checked out on Windows with CRLF. Fixes #317 (SessionStart hook fails due to CRLF line endings) Files converted: - hooks/session-start.sh - lib/brainstorm-server/start-server.sh - lib/brainstorm-server/stop-server.sh - lib/brainstorm-server/wait-for-feedback.sh - skills/systematic-debugging/find-polluter.sh Co-Authored-By: Claude Opus 4.5 <[email protected]> * fix: update Windows hook execution for Claude Code 2.1.x Claude Code 2.1.x changed the Windows execution model: it now auto-detects .sh files in hook commands and prepends "bash " automatically. This broke the polyglot wrapper because: Before: "run-hook.cmd" session-start.sh (wrapper executes) After: bash "run-hook.cmd" session-start.sh (bash can't run .cmd) Changes: - hooks.json now calls session-start.sh directly (Claude Code handles bash) - Added deprecation comment to run-hook.cmd explaining the change - Updated RELEASE-NOTES.md Fixes #317, #313, #275, #292 Co-Authored-By: Claude Opus 4.5 <[email protected]> --------- Co-authored-by: Claude Opus 4.5 <[email protected]>
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Summary
.gitattributesto enforce LF line endings for shell scriptsRoot Cause
Claude Code 2.1.x changed the Windows execution model for hooks. It now auto-detects
.shfiles in hook commands and prependsbashon Windows. This broke the polyglot wrapper because:became:
...and bash cannot execute a .cmd file.
Changes
session-start.shdirectly instead of using the polyglot wrapperTest plan
bash "C:\Users\...\hooks/session-start.sh"works with mixed path separatorsCloses
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