What is Plandex?

Plandex is an open‑source, terminal‑based AI coding agent that handles large projects, files, and tasks. It offers a diff review sandbox, full auto mode, and granular step‑by‑step control, allowing developers to stage and review changes across many files before execution.

The agent supports up to 2 million token context and uses tree‑sitter project maps for efficient navigation of complex codebases. Plandex can execute commands, roll back on failure, and automatically debug, streamlining the development workflow. It integrates models from Anthropic, OpenAI, Google, and other providers, enabling teams to choose the optimal model for each stage without lock‑in.

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Plandex's key features

Terminal AI coding agent
Handles large projects and files
Diff review sandbox
Full auto mode
Smart context up to 2M tokens
Configurable autonomy step-by-step control
Execute commands rollback auto debug

Plandex use cases

Review a multi‑file codebase with Plandex's diff‑sandbox, automatically flagging anti‑patterns, suggesting modular splits, and generating merge‑ready patches across Anthropic, OpenAI, and Google models
Debug a complex microservice stack by staging changes in Plandex's rollback sandbox, stepping through errors with tree‑sitter navigation, and receiving real‑time LLM‑driven diagnostics
Integrate Plandex into a CI pipeline to auto‑review pull requests, produce concise change summaries, and resolve conflicts before merge using multi‑model LLM automation