SmartClip hooks into your shell's paste widget (zsh, bash, fish) and silently fixes multi-line commands before the shell sees them. You paste with Cmd+V as usual — no new keybindings, no daemon, no background process.

It uses score-based heuristics to detect shell commands (so it won't mangle your JSON or prose), joins lines intelligently (backslash continuations, pipes, `&&`), strips prompt characters, and validates everything with `bash -n` before inserting. If it's not confident or the fix has invalid syntax, it passes through unchanged.

~150 lines of bash. Zero dependencies.

`brew install akshaydeshraj/smartclip` or `npm install -g smartclip-cli`