METHODOLOGIE

Plan mode

An agent operating mode that separates planning from execution: the agent first proposes a step-by-step plan for a human to review and approve, and only then carries it out. It reduces wasted or unsafe actions on complex tasks by front-loading intent and human oversight before any change is made.

Origin

Popularized by agent coding tools that separate an approved plan from its execution.

activation: Shift+Tab in Claude Code
description: Keeps all tools + system message instead of swapping tools
definition: Non-execution mode for planning and codebase research
effect: Doubles or triples success rate on complex tasks
mechanism: Claude reads the repository without modifying it until the plan is accepted
usage: Upfront planning before complex implementation