Plandex

A terminal agent built for large, multi-file tasks: plans changes across steps, accumulates them in a protected sandbox separate from the working tree, and applies them only when approved.

View source on GitHub

Key takeaways

• 01

  Accumulate changes in a staging sandbox; apply atomically on approval

• 02

  Long tasks need plans that survive across model calls

Flows built on this research

Agent Architecture

From CLI Harness to Product

Grow a working agent loop into a product: sessions, config, resumability, and the packaging polish the successful terminal agents share.

5 steps · 90-150 minutes

Agent Architecture

Add a Plan/Todo System to Your Agent

Give your agent the planning discipline of the leading harnesses: an explicit, model-visible todo list that survives long tasks.

4 steps · 60-90 minutes