Plandex - AI Coding Assistants Tool

Overview

Plandex is an open-source, terminal-based AI coding agent for planning and executing complex, multi-step workflows across large projects. It supports a 2M-token context (about 100K tokens per file), uses tree-sitter for fast project mapping and syntax validation, and offers configurable autonomy from fully automated execution to fine-grained diff review.

Key Features

• Open-source, terminal-based AI coding agent
• Plans and executes complex multi-step coding workflows
• Supports up to a 2M-token context (~100K tokens per file)
• Uses tree-sitter for fast project mapping and syntax validation
• Configurable autonomy from full automation to manual control
• Cumulative diff review sandbox for safe iteration
• Automated debugging of terminal commands
• Designed for multi-file, large-project operations

Ideal Use Cases

• Large-scale refactors affecting dozens of files
• Implementing multi-step features across many modules
• Automated debugging and terminal-command-driven fixes
• Scripted code maintenance and CI-adjacent workflows
• Prototyping architecture changes in very large codebases

Getting Started

• Clone the Plandex GitHub repository
• Install dependencies following the repository instructions
• Point Plandex at your project directory
• Set desired autonomy level (automated or review sandbox)
• Run the planner to generate a workflow plan
• Review cumulative diffs in the sandbox before applying
• Execute planned changes and monitor automated debugging output

Pricing

Pricing not disclosed. Project repository is open source; consult the GitHub page for license, hosting, or commercial offerings.

Limitations

• Terminal-only interface; no native graphical UI
• Assumes familiarity with command-line development workflows
• Large 2M-token context could require substantial compute resources

Key Information

• Category: Coding Assistants
• Type: AI Coding Assistants Tool