SecondThought: Command Confirmation Guard

Prevent an accidental /clear, /kill, /stop, /ban, or other command from being sent with a single press of Enter.

SecondThought is a lightweight client-side command confirmation mod. When a command requires confirmation, its first submission is blocked locally. Send the exact same command again within the configured time window to confirm it.

It works in singleplayer and on multiplayer servers without requiring the server to install the mod.

Features

• Protect manually typed commands before they reach the server
• Require the exact same command and arguments for confirmation
• Choose which commands are direct and which require confirmation
• Change the active mode instantly with a local in-game command
• Save mode changes automatically to the JSON configuration
• Show only the command root in warnings, not potentially sensitive arguments
• Fall back to safe defaults if the configuration is invalid
• No telemetry, network service, Fabric API, or server-side dependency

Command modes

Change modes without restarting:

/secondthought mode all
/secondthought mode listed
/secondthought mode none
/secondthought mode protected
/secondthought status
/secondthought help

These control commands are handled locally and are never sent to the server.

Default protection

The default configuration protects these command roots:

ban, ban-ip, clear, deop, kill, op, stop, whitelist, worldborder

Edit config/secondthought.json to change the protected or direct command lists and the confirmation window. Existing configuration files from earlier 0.1.0 test builds remain compatible.

Requirements

• Minecraft Java Edition 1.21.11
• Fabric Loader 0.19.3 or a compatible later 0.19.x release
• Java 21
• Client-side installation only

Fabric API is not required.

Scope and compatibility

SecondThought guards normal commands manually submitted through the Minecraft client. It does not grant permissions, replace a server permission plugin, classify every modded command automatically, or undo a command that has already run. Commands triggered by clickable text or sent unattended by another mod are outside version 0.1.0's scope.