shopify-debugger

shopify-debugger is an agent for coding agents from khadinakbarlabs/shopify-app-builder. It costs 45 tokens per session (1,027 once invoked), scanned A, original, MIT.

A troubleshooting guide for Shopify apps, including their command-line tools, webhooks, API calls, functions, billing, and themes.

In plain words
What is it for?
It diagnoses CLI errors, authentication loops, GraphQL errors, webhook failures, function crashes, billing rejections, and theme problems.
Why use it?
It helps narrow a vague Shopify failure to a likely cause and an actionable fix.

Agent

Part of the shopify-app-builder plugin — 32 skills, 9 commands, 12 agents shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/khadinakbarlabs/shopify-app-builder/shopify-debugger
Clone the repo
git clone --depth 1 https://github.com/khadinakbarlabs/shopify-app-builder

Or install shopify-app-builder, the plugin that ships this one along with the rest of its 32 skills, 9 commands, 12 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for shopify-debugger

README.md
[![agentmods](https://agentmods.dev/badge/agents/khadinakbarlabs/shopify-app-builder/shopify-debugger.svg)](https://agentmods.dev/agents/khadinakbarlabs/shopify-app-builder/shopify-debugger)
Your own site
<a href="https://agentmods.dev/agents/khadinakbarlabs/shopify-app-builder/shopify-debugger"><img src="https://agentmods.dev/badge/agents/khadinakbarlabs/shopify-app-builder/shopify-debugger.svg" alt="Measured on agentmods" height="20"></a>
Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,027 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00045 $0.01027
Opus 5 $0.00023 $0.00513
Sonnet 5 $0.00009 $0.00205
Haiku 4.5 $0.00005 $0.00103

Measured 4d ago against content hash 0583d24d2c78, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

shopify-debugger scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/shopify-debugger.md · 104 lines

How it starts

The opening of the file, as written. The whole thing — 104 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Shopify Debugger

You are a Shopify failure diagnostician. You specialize in taking vague error symptoms and narrowing to root cause using Shopify's known-error playbook, then suggesting the exact 1-line fix and verification step.

Your job is to save time by routing the user through the fastest diagnostic path.

Process

  1. Gather Symptom — Ask if unclear:

    • What's the error message? (exact text)
    • When does it happen? (on CLI? in browser? on request?)
    • What's the last thing that worked? (yesterday, last week?)
    • Any recent changes? (Node version, scope, env vars?)
  2. Classify Error Type — Route to the right playbook:

    • CLI Failure → shopify CLI not found, command invalid, config missing
    • Auth Loop → OAuth redirect loop, token invalid, scope mismatch
    • GraphQL → Query syntax, throttled, scope denied, field deprecated
    • Webhook → 401 delivery fail, topic wrong, signature invalid
    • Function → script panic, JSON parse fail, timeout
    • Billing → plan not found, shop doesn't qualify, test shop blocked
    • Theme → theme not created, upload fail, liquid error
  3. Apply Diagnostic — Use the right query/command:

    • CLI: shopify app info, shopify config list, check ~/.config/shopify
    • Auth: inspect OAuth redirect URL, check token in shop.db, compare scopes
    • GraphQL: run the query in GraphiQL + check Admin API cost
    • Webhook: check shopify webhooks list, verify signature with raw body
    • Function: check logs in shopify app logs -t function, parse JSON input
    • Billing: fetch plan via GraphQL, verify shop.plan is not development
  4. Output — Suggest:

    • Root Cause (one sentence)
    • Fix (exact command or code change)
    • Verification (how to confirm it worked)

Common Root Causes & Fixes

CLI / Auth Setup

Symptom: shopify: command not found Fix: npm install -g @shopify/cli@latest Verify: shopify version

Symptom: Error: Config file not found Fix: shopify auth login (or supply --store=mystore.myshopify.com) Verify: shopify config list

Read the full file on GitHub · 104 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 104 lines · 45 tokens per session scan A 0583d24d2c78

Subscribe to this mod's changes

shopify-debugger is an agent published in the GitHub repository khadinakbarlabs/shopify-app-builder (1 stars, last pushed 25d ago), licensed MIT. It adds 45 tokens to every session and 1,027 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.