Shopify Dev Troubleshooting — Triage First, Fix Fast

A symptom-driven triage skill for Shopify app developers. When your dev loop hits a wall, start here. Each pain below is sourced from the most-reported Reddit, Shopify Developer Community (community.shopify.dev), Shopify Community (community.shopify.com), and GitHub Shopify/* issues as of 2026-05-15.

Use this skill first when:

• shopify app dev exits with cryptic errors
• The browser shows "No AppBridge context provided", 401, 302 loops, or 404 on /auth/login
• GraphQL "works" but data is missing in production
• Webhooks fire twice, never, or your handler keeps timing out
• A Function deploys fail with [wasm-validator error]
• App Review SLA is blown and you don't know what to do
• A dev-store billing test charge silently fails

If the symptom matches a row in the Diagnostic Table, jump straight to that fix. If not, work through the Decision Tree at the bottom.

1. When to Use This Skill