What: Shell environment can now be customized per session through hook scripts that persist throughout the session lifecycle.
How to use:
# SessionStart hooks can create environment files:
# Hook creates: ~/.claude/session-env/hook-1.sh
# Environment is automatically sourced before each Bash command
# Access the env file path via: $CLAUDE_ENV_FILEDetails:
- Hook scripts stored in
~/.claude/session-env/hook-{N}.shdirectories - Multiple hooks are concatenated and sourced in numerical order
- SessionStart hooks receive
CLAUDE_ENV_FILEenvironment variable pointing to persistent env file - Environment modifications persist for entire session across all Bash tool executions
- Automatic cleanup of old session environment directories
- Cache invalidation supported for dynamic updates
- Evidence:
bNA()at line 72216,Vh1()at line 247855,ia0()at line 454456