Shellclear is a command-line security tool designed to manage and protect shell command history across multiple shell environments including Bash, Zsh, PowerShell, and Fish. The tool provides functionality to display a summary of sensitive commands when opening a new terminal session, allowing users to review potentially exposed information. It can automatically clear sensitive commands from shell history to prevent unauthorized access to confidential data or credentials that may have been entered in previous sessions. Shellclear includes a stash feature that temporarily hides command history during presentations or screen sharing sessions, helping prevent accidental exposure of sensitive information to audiences or participants. The tool integrates with shell environments through initialization scripts that can be added to shell configuration files. Once configured, it operates transparently within the user's normal workflow while providing ongoing protection for command history data. Installation requires adding an evaluation command to the appropriate shell configuration file, after which the tool becomes available through the shellclear command with various options and help documentation.