---
title: "See what will change before a deployment: the while.sh docs"
url: https://while.sh/en/docs/building-blocks/plan/
updated: 2026-11-09
---

# Plan

Before a deployment, the plan shows what will change, building block by building block, and what it changes per month, without touching anything.

> You, to your agent: Show me what will change before you deploy.

## When to use it

Use it before a worrying change: see what will change, for each building block, without touching anything.

## How it works

The `plan_deploy` tool shows what will change, for each building block, and what it changes per month, before touching anything.

## What to know

The plan is priced: `per_month` says what each added or removed building block changes per month, for example "+ €5 per month: a new database 'main'".

## Your agent's MCP tools

Your agent handles it with the `plan_deploy` and `deploy_app` tools.