# No trust signals — dev spec
Site: yahoo.com · Priority 7 · High · Effort: Medium (2-5 days)

## Problem
The homepage lacks any trust elements (guarantee, security badge, contact route) which may reduce user confidence in engaging with the site.

## Evidence (from the live site)
> Tech.trust shows guarantee: false, security_badge: false, contact_route: false; no visible trust badges or guarantees in body_sample.
> No trust indicators present.

## Current state
h1: none; cta: Sign in, See more stories on Yahoo 100, See forecast; notes: No trust indicators present.

## Required change
h1: Trusted news and more; cta: Sign in; notes: Add a trust line like 'Trusted by millions' or a security badge near sign-in.

## Acceptance criteria
- GIVEN a first-time visitor on the affected page
- WHEN the change is live
- THEN Add a trust line like 'Trusted by millions' or a security badge near sign-in.
- AND no layout regression at 375px / 768px / 1280px
- AND the changed control is keyboard-reachable with an accessible name

## Tracking
- Fire `cro_no_trust_signals` 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.