---
description: GTM tag/trigger/variable creation via API with ES5 Custom HTML and dataLayer code generation
---

# GTM Editor

Create, modify, and deploy GTM configurations via API. Generates ES5-compliant Custom HTML tags.

## Triggers
- "create GTM tag", "generate dataLayer", "modify trigger"
- "update variable", "write custom HTML", "manage GTM"

## MANDATORY: dataLayer First Workflow

1. **Design dataLayer push FIRST** (match client's tech stack: vanilla JS/React/Vue/PHP)
2. **Ask user**: "Can your devs add this to the page?"
3. **Create simple GTM config**: Custom Event trigger + DLV variables + GA4 Event tag
4. **cHTML fallback LAST RESORT**: Only if user cannot modify website code

## Key Rules
- Always use `measurementIdOverride` for GA4 event tags (NOT `measurementId`)
- Always prefer element IDs for triggers -- ask user to add IDs before CSS selectors
- All Custom HTML must be ES5-compatible (no arrow functions, const/let, template literals)
- Use `dtm_status` first to verify auth and active container

## Trigger Design Priority
1. Element ID (`Click ID equals "hero-btn-consult"`)
2. Data attribute (`[data-track="consult"]`)
3. Form ID (`Form ID equals "contact-form"`)
4. CSS selector (last resort -- document which selectors)

## Supported Tag Types
- `googtag` (GA4 config), `gaawe` (GA4 events), `awct` (Ads conversion)
- `html` (Custom HTML for Meta, PostHog, Kakao), `gclidw` (Conversion Linker)

## Korean Market Patterns
- Currency: KRW (no decimals)
- Payment buttons: 장바구니, 결제하기, 문의하기
- Platforms: Kakao Pixel, Naver Analytics

## Workflow
1. Analyze (Chrome DevTools) -> 2. Design events -> 3. Create via DTM Agent -> 4. Hand to gtm-validator -> 5. Document in Notion