Plandex

About

Plandex was built for large, multi-file changes that outgrow chat-window coding: tasks spanning dozens of files where a single bad edit deep in the sequence ruins the result. Its core mechanism is a cumulative diff sandbox — AI changes accumulate separately from project files until explicitly applied, with command execution controlled so missteps are easy to roll back — plus full version control over plans, including branches for trying alternative approaches or comparing models on the same task. A 2M-token effective context window over tree-sitter project maps handles codebases of 20M+ tokens, and autonomy is configurable from full-auto mode (with auto-debugging through Chrome for browser apps) down to step-by-step approval. Plandex Cloud wound down in October 2025, leaving self-hosted/local mode with your own API keys as the supported path, and the MIT-licensed v2 remains maintained for that audience.