Terminal Agent

Plandex

A terminal-based AI coding agent built for large, long-running tasks, with a project-wide diff review sandbox before anything touches your files.

Pricing

Open source, free (bring your own API key); hosted cloud plan available

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Plandex is a terminal AI coding agent aimed at tasks too large for a single chat exchange — refactors and features spanning dozens of files — with a sandboxed diff review step before changes are applied.

Why it stands out

Built for big tasks. Plandex is explicitly designed to hold context and make progress across long, multi-step jobs rather than short single-file edits.
Sandbox-first execution. Changes accumulate in a protected sandbox and are reviewed as a full diff before being applied to your actual files.
Open source with a hosted option, so you can self-host or use the managed cloud version.

Good for

Developers tackling large refactors or features who want to review a complete diff before anything is applied.