# ADR-0002 GAS Thin Adapter

## Context

GAS has accumulated business logic that belongs in Python validation and builders.

## Decision

Constrain GAS to collection, normalization, export, and display responsibilities.

## Consequence

Decision, sizing, stop-loss, take-profit, and risk calculations must live in deterministic Python builders.

## Rollback

If a GAS function becomes a business-logic dependency, move the logic into Python and keep only a thin adapter in GAS.

