# Proposal

## Why

The developers who run the app need their own tools: a lab for testing tools, and a view of what the AI costs (PRD 4.20).

## What Changes

- An empty lab page for testing and development tools.
- An AI usage page: calls and estimated cost by day, class and kind.

## Capabilities

### New Capabilities
- `developer-tools`: the lab and the AI usage page (PRD DEV-3, DEV-4). The prompter (DEV-2) is its own change, `add-prompter`.

### Modified Capabilities

## Impact

- Reads the cost records of `ai-help`.