via “multi-phase plan execution with chat-tell-build-apply lifecycle”
Open source, terminal-based AI programming engine for complex tasks. [#opensource](https://github.com/plandex-ai/plandex)
Unique: Implements a formal 4-phase plan lifecycle with explicit state transitions (chat→tell→build→apply) stored server-side, enabling resumable execution and human review gates between AI reasoning and code application. Sandbox staging separates AI-generated changes from live project files until explicit approval.
vs others: Unlike Copilot's single-turn code completion or Cursor's inline editing, Plandex enforces structured planning with mandatory review checkpoints and staged application, making it safer for large-scale refactoring where preview-before-apply is non-negotiable.