Advanced sed Command Security

What: Complete replacement of sed command validation with sophisticated parsing that blocks dangerous operations How to use:

# Safe sed commands work normally
claude "Use sed to replace text in file.txt"

# Dangerous operations are now blocked:
# - File writes (s///w, w command)
# - Command execution (s///e, e command)
# - Multiple expression exploits

Details:

• Prevents sed commands from writing to files or executing shell commands
• Parses actual sed expressions instead of using regex patterns
• Detects and blocks write operations (w), execute operations (e), and dangerous flags
• Evidence: P1B() at line 379595, mS6() at line 379676, hS6() at line 379611, gS6() at line 379638