# Rotating hero headlines — dev spec
Site: yahoo.com · Priority 5 · High · Effort: Low (0.5-2 days)

## Problem
The article page displays multiple H1s, creating a rotating hero effect that confuses the primary topic and dilutes the article's focus, undermining the visitor's expectation of a single clear story.

## Evidence (from the live site)
> H1s: ['J.J. McCarthy to miss Broncos game, reportedly ‘not comfortable’ after injury', 'Raiders still not ready to name starting quarterback after final preseason game', 'NFL Preseason Blitz: Falcons QB Tua Tagovailoa booed in Miami return, but shows a little improvement']
> The page shows three H1s, likely from a carousel or related stories, which can confuse users about the main article.

## Current state
h1: Multiple H1s (three headlines); cta: Sign in / Watch / Schedule / Get Fantasy Plus / Watch on X; notes: The page shows three H1s, likely from a carousel or related stories, which can confuse users about the main article.

## Required change
h1: J.J. McCarthy to miss Broncos game, reportedly ‘not comfortable’ after injury; cta: Read the full story; notes: Ensure only one H1 is present, matching the article's title, and remove or demote other headlines to H2s to maintain clarity and focus.

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Ensure only one H1 is present, matching the article's title, and remove or demote other headlines to H2s to maintain clarity and focus.
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_rotating_hero_headlines` on interaction with the changed element
- Verify the event fires in BOTH variants before opening traffic

## Test plan
- Two-proportion z-test, 95% significance, 80% power
- 315,206 visitors per variant to detect a 5.0% relative lift
- Run at least one full business cycle; duration depends on traffic

## Rollback
Feature-flag the change; revert if the primary metric drops for 3 consecutive days.