Developer Builds Open-Source LLM Tool 'Nudge' to Fix Failed Terminal Commands

A developer created 'nudge', an open-source command-line tool that suggests corrections when a terminal command fails, built during a Fable promotion period using an LLM coding agent in roughly an hour. The tool works across PowerShell, bash, zsh, and fish shells, addressing the common frustration of using wrong commands when switching between Windows and Unix environments. Simple typos are resolved locally without querying a model, while more complex errors — such as incorrect subcommands or plain-English intent — are handled by a cloud or local Ollama-compatible LLM. Users can review each suggestion before running it, and potentially destructive commands like 'rm -rf' require an explicit typed confirmation rather than a simple Enter press. The project was designed to do one thing narrowly: intercept failed commands, propose a fix, and execute only with user approval.