Plandex

Plandex is an open source, terminal-based AI coding agent designed for large projects and real-world tasks. It can plan and execute complex, multi-step coding workflows across dozens of files, supports a massive 2M token context (approximately 100K tokens per file), and uses tree-sitter for fast project mapping and syntax validation. It offers configurable autonomy ranging from full automated execution to fine-grained control with a cumulative diff review sandbox and automated debugging of terminal commands.