fredshell

An opinionated, batteries-included Rust shell. The goal is a daily-driver replacement for zsh with a baked-in starship-style prompt, fzf-powered history and completion, lsd semantics for ls, and optional AI helpers.

Status: very early. The REPL currently shells out to /bin/sh -c for everything it can't yet handle natively.

Quick start

With Nix + direnv:

direnv allow
cargo run -p fredshell

Without Nix:

cargo run -p fredshell

Layout

• crates/fredshell — binary entrypoint, CLI, reedline glue.
• crates/fredshell-core — builtins, exec, REPL state.
• crates/fredshell-prompt — starship-style prompt renderer.
• xtask — project automation (cargo xtask check, coverage, ...).
• nix/ — overlay + home-manager module.
• flake.nix — dev shell + package + checks.

Roadmap

See the conversation that bootstrapped this repo. MVP target:

1. Reedline REPL with starship-subset prompt.
2. Builtins (cd, exit, export, alias, history).
3. Native fork/exec for simple pipelines, /bin/sh -c fallback otherwise.
4. fzf-style history (Ctrl-R) backed by nucleo.
5. lsd built in as the default ls.
6. Nix flake + home-manager module (already present in skeleton form).
7. Optional AI helpers (natural-language → command, error explanation).

License

MIT — see LICENSE.