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Commerce Fieldbook

Commerce Fieldbook / Projects and references

The wider ecosystem behind better commerce operations.

49 reviewed resources across 8 operational categories. Every entry names its maintainer, license or usage boundary, maturity, and practical reason for inclusion.

Beseam curates the index; it does not repackage external work as its own. Emerging and experimental material is labeled so it is not mistaken for a settled standard.

Catalog review date · 2026-07-25

Showing 49 of 49 reviewed resources

Agent skills and protocols

Emerging

Anthropic Agent Skills

Maintained by Anthropic and contributors

Open-source project · Mixed: Apache-2.0 examples and source-available document skills

Public examples, templates, and the reference structure for reusable SKILL.md-based agent capabilities.

  • Designing versioned commerce skills
  • Reviewing skill packaging and boundaries
Agent skillsClaudeSKILL.md

Reviewed 2026-07-25

Agent skills and protocols

Emerging

Agent Skills specification

Maintained by Agent Skills maintainers

Primary reference · Published specification; see repository terms

The published structure and metadata model for portable folders of agent instructions, scripts, and resources.

  • Validating public skill packages
  • Keeping skills portable across compatible agents
SpecificationAgent skillsPortability

Reviewed 2026-07-25

Agent skills and protocols

Emerging

Shopify AI Toolkit

Maintained by Shopify

Open-source project · MIT

Shopify-aware agent plugins, skills, documentation lookup, schema validation, and CLI-assisted store workflows.

  • Shopify development with current platform context
  • GraphQL, Liquid, and extension validation
ShopifyAgent skillsValidation

Reviewed 2026-07-25

Agent skills and protocols

Emerging

Model Context Protocol

Maintained by Model Context Protocol project

Open standard · MIT

An open protocol and schema for connecting AI applications to tools, data sources, and contextual services.

  • Connecting commerce agents to approved systems
  • Separating tool contracts from model prompts
MCPAgentsIntegrations

Reviewed 2026-07-25

Agent skills and protocols

Stable

Promptfoo

Maintained by Promptfoo and contributors

Open-source project · MIT

A framework for evaluating prompts, agents, and model behavior with repeatable test cases and assertions.

  • AI answer regression checks
  • Commerce-agent workflow evaluation
AI evaluationGEOAgents

Reviewed 2026-07-25

Agent skills and protocols

Experimental

Saleor MCP

Maintained by Saleor

Open-source project · AGPL-3.0

An ecommerce-specific MCP server for exploring how agents can interact with a composable commerce platform.

  • Agent-to-commerce experiments
  • Studying scoped commerce tools
SaleorMCPAgentic commerce

Reviewed 2026-07-25

Agent skills and protocols

Emerging

Shopify Universal Commerce Protocol quickstart

Maintained by Shopify

Primary reference · Official developer documentation

Shopify's current walkthrough for agent-driven product discovery, cart creation, checkout conversion, and order tracking.

  • Tracking agentic-commerce capabilities
  • Separating preview workflows from stable storefront behavior
ShopifyUCPAgentic commerce

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Medusa

Maintained by Medusa and contributors

Open-source project · MIT

Composable commerce modules for product, cart, order, inventory, fulfillment, and integration workflows.

  • Headless commerce references
  • Catalog and order integration experiments
Commerce platformHeadlessCatalog

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Vendure

Maintained by Vendure and contributors

Open-source project · GPL-3.0

A TypeScript and GraphQL headless commerce framework with channel, catalog, order, and localization primitives.

  • Channel-aware catalog patterns
  • TypeScript commerce integrations
Commerce platformGraphQLTypeScript

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Saleor Core

Maintained by Saleor and contributors

Open-source project · BSD-3-Clause

A composable GraphQL commerce API for products, channels, checkout, orders, apps, and multi-market operations.

  • Composable commerce architecture
  • GraphQL catalog and checkout references
Commerce platformGraphQLComposable

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

WooCommerce

Maintained by Automattic and contributors

Open-source project · GPL-3.0-or-later

The open-source WordPress commerce platform and a major reference for plugin-driven storefront operations.

  • WordPress commerce investigations
  • Plugin and theme interaction patterns
Commerce platformWordPressPlugins

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Sylius

Maintained by Sylius and contributors

Open-source project · MIT

A Symfony-based headless ecommerce framework for highly customized commerce applications and integrations.

  • Custom commerce-domain modeling
  • PHP and API-led storefront references
Commerce platformSymfonyHeadless

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Spree Commerce

Maintained by Spree Commerce and contributors

Open-source project · BSD-3-Clause

A headless ecommerce platform with REST APIs, a TypeScript SDK, and a Next.js storefront.

  • Cross-border and B2B patterns
  • Storefront and backend reference implementations
Commerce platformREST APINext.js

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Bagisto

Maintained by Webkul and contributors

Open-source project · MIT

A Laravel ecommerce platform with marketplace, multi-tenant, mobile, and headless extension patterns.

  • Laravel commerce references
  • Marketplace and multi-tenant experiments
Commerce platformLaravelMarketplace

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

PrestaShop

Maintained by PrestaShop and contributors

Open-source project · OSL-3.0

An established open-source ecommerce platform with modules, themes, product, order, and internationalization workflows.

  • Module-driven commerce investigations
  • International catalog references
Commerce platformPHPModules

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Magento Open Source

Maintained by Adobe, Magento community, and contributors

Open-source project · OSL-3.0; repository also includes other license files

A large modular ecommerce codebase for catalog, pricing, inventory, checkout, indexing, and extension workflows.

  • Enterprise commerce architecture references
  • Indexing and extension investigations
Commerce platformPHPEnterprise

Reviewed 2026-07-25

Commerce platforms and storefronts

Stable

Shopify Hydrogen

Maintained by Shopify and contributors

Open-source project · MIT

Shopify's open-source stack and libraries for building dynamic headless storefronts with React Router.

  • Shopify headless storefronts
  • Storefront API and performance patterns
ShopifyHeadlessReact

Reviewed 2026-07-25

Catalog, feeds and structured data

Reference

Schema.org

Maintained by Schema.org community

Open standard · Vocabulary and supporting software published for reuse; see terms

The shared structured-data vocabulary used to describe products, offers, organizations, reviews, and web entities.

  • Product and Offer markup
  • Merchant and organization identity
Structured dataSEOCatalog

Reviewed 2026-07-25

Catalog, feeds and structured data

Reference

Google Product structured-data documentation

Maintained by Google Search Central

Primary reference · Official documentation

Google's requirements and guidance for Product snippets and merchant-listing structured data in Search.

  • Merchant-listing eligibility
  • Product and Offer validation
Structured dataGoogle SearchProduct

Reviewed 2026-07-25

Catalog, feeds and structured data

Reference

Google Merchant Center product data specification

Maintained by Google Merchant Center

Primary reference · Official documentation

The attribute, formatting, identifier, availability, price, and landing-page requirements for Merchant Center data.

  • Feed validation
  • Feed-to-landing-page parity
Merchant feedsGoogle ShoppingCatalog

Reviewed 2026-07-25

Catalog, feeds and structured data

Reference

GS1 Digital Link standard

Maintained by GS1

Open standard · GS1 standard; usage subject to GS1 terms

A standard for expressing GS1 identifiers in web-addressable links that connect physical products to digital information.

  • Product identity resolution
  • Connecting GTINs to web resources
GS1Product identityStandards

Reviewed 2026-07-25

Catalog, feeds and structured data

Reference

JSON-LD 1.1

Maintained by W3C

Open standard · W3C Recommendation

The W3C recommendation for expressing linked data in JSON, commonly used to publish product structured data.

  • Structured-data serialization
  • Validating context and graph behavior
JSON-LDW3CStructured data

Reviewed 2026-07-25

Catalog, feeds and structured data

Reference

Shopify Storefront API

Maintained by Shopify

Primary reference · Official API documentation

The official Shopify API surface for public products, collections, carts, customer accounts, and storefront experiences.

  • Catalog source-of-truth checks
  • Headless storefront integration review
ShopifyGraphQLStorefront API

Reviewed 2026-07-25

Catalog, feeds and structured data

Reference

Google Merchant API

Maintained by Google

Primary reference · Official API documentation

Google's current API documentation for programmatic merchant accounts, products, data sources, and diagnostics.

  • Merchant diagnostics integrations
  • Programmatic product-data workflows
Merchant CenterAPICatalog

Reviewed 2026-07-25

Discovery, SEO and GEO

Reference

Robots Exclusion Protocol — RFC 9309

Maintained by Internet Engineering Task Force

Open standard · Internet Standards Track

The standards-track definition of robots.txt retrieval, matching, errors, and caching for automated clients.

  • Crawler-access reviews
  • Separating crawl controls from authorization
CrawlingSEOWeb standards

Reviewed 2026-07-25

Discovery, SEO and GEO

Reference

Sitemaps protocol

Maintained by Sitemaps.org participants

Open standard · Protocol published for implementation

The XML sitemap format and submission rules used to communicate canonical URLs and update metadata to crawlers.

  • Catalog URL discovery
  • Sitemap completeness and freshness checks
SitemapsCrawlingSEO

Reviewed 2026-07-25

Discovery, SEO and GEO

Reference

Google Search Essentials

Maintained by Google Search Central

Primary reference · Official documentation

Google's technical requirements, spam policies, and core best practices for eligibility and performance in Search.

  • Technical SEO acceptance criteria
  • Checking third-party SEO recommendations
Google SearchSEOPolicies

Reviewed 2026-07-25

Discovery, SEO and GEO

Emerging

Google guide to generative AI features in Search

Maintained by Google Search Central

Primary reference · Official documentation

Google's current guidance on AI Overviews, AI Mode, SEO fundamentals, measurement, and claims around AEO and GEO tactics.

  • Grounding GEO recommendations
  • Avoiding unsupported AI-search shortcuts
Generative searchGEOGoogle Search

Reviewed 2026-07-25

Discovery, SEO and GEO

Stable

IndexNow

Maintained by IndexNow sponsors and participating search engines

Open standard · CC BY-SA 4.0 specification

A protocol for notifying participating search engines when URLs are added, updated, or deleted.

  • Faster change notification
  • Catalog URL update workflows
IndexingSearch enginesProtocol

Reviewed 2026-07-25

Discovery, SEO and GEO

Emerging

Shopify agents.md and llms.txt templates

Maintained by Shopify

Primary reference · Official developer documentation

Shopify's canonical agent-discovery document, template behavior, UCP metadata, and fallback relationship with llms.txt routes.

  • Shopify agent-discovery reviews
  • Avoiding stale hardcoded agent endpoints
Shopifyagents.mdAgent discovery

Reviewed 2026-07-25

Discovery, SEO and GEO

Experimental

llms.txt proposal

Maintained by Jeremy Howard and community contributors

Community specification · Community proposal; see site terms

A community proposal for serving a concise Markdown index intended to help language models use a website at inference time.

  • Tracking agent-discovery experiments
  • Comparing proposals with platform-native implementations
llms.txtGEOProposal

Reviewed 2026-07-25

Discovery, SEO and GEO

Emerging

Web Bot Auth

Maintained by IETF draft authors and implementers

Primary reference · IETF drafts and implementation documentation

A cryptographic request-signing approach for identifying automated bots and agents to participating web infrastructure.

  • Verified-agent access design
  • Separating authenticated agents from anonymous crawling
AgentsBot identityHTTP signatures

Reviewed 2026-07-25

Analytics and attribution

Reference

Google Analytics ecommerce measurement

Maintained by Google Analytics

Primary reference · Official developer documentation

The recommended GA4 ecommerce events, item model, currency handling, purchase identifiers, promotions, and refunds.

  • Event-contract reviews
  • Revenue and item-level measurement reconciliation
GA4Ecommerce eventsMeasurement

Reviewed 2026-07-25

Analytics and attribution

Reference

Shopify Web Pixels API

Maintained by Shopify

Primary reference · Official developer documentation

Shopify's controlled browser APIs and customer-event subscriptions for analytics and marketing measurement in sandboxed pixels.

  • Customer-event instrumentation
  • Consent-aware Shopify measurement
ShopifyMeasurementCustomer events

Reviewed 2026-07-25

Analytics and attribution

Stable

Snowplow JavaScript Tracker

Maintained by Snowplow and contributors

Open-source project · Apache-2.0

A browser event-tracking SDK for structured first-party behavioral data and custom ecommerce measurement designs.

  • First-party event pipelines
  • Comparing observed events with booked orders
AnalyticsFirst-party dataEvents

Reviewed 2026-07-25

Testing, crawling and performance

Stable

Lighthouse

Maintained by Google Chrome team and contributors

Open-source project · Apache-2.0

Automated audits for performance, accessibility, best practices, SEO, and evolving web-platform checks.

  • Storefront performance baselines
  • Repeatable page audits
PerformanceSEOAccessibility

Reviewed 2026-07-25

Testing, crawling and performance

Stable

Playwright

Maintained by Microsoft and contributors

Open-source project · Apache-2.0

Cross-browser automation for Chromium, Firefox, and WebKit, useful for repeatable storefront and purchase-path verification.

  • Product-page checks
  • Cart and checkout verification
TestingPurchase journeyAutomation

Reviewed 2026-07-25

Testing, crawling and performance

Stable

Crawlee

Maintained by Apify and contributors

Open-source project · Apache-2.0

A web crawling and browser-automation library for collecting repeatable evidence across catalogs and storefronts.

  • Catalog crawling
  • Rendered-page evidence at scale
CrawlingCatalogEvidence

Reviewed 2026-07-25

Testing, crawling and performance

Stable

axe-core

Maintained by Deque Systems and contributors

Open-source project · MPL-2.0

An accessibility testing engine that can be integrated into automated storefront and component tests.

  • Automated accessibility regression tests
  • Product-page usability evidence
AccessibilityTestingCompliance

Reviewed 2026-07-25

Testing, crawling and performance

Stable

web-vitals

Maintained by Google Chrome team and contributors

Open-source project · Apache-2.0

A small library for measuring Core Web Vitals and attribution data from real storefront sessions.

  • Real-user performance measurement
  • Diagnosing LCP, INP, and CLS regressions
Core Web VitalsRUMPerformance

Reviewed 2026-07-25

Testing, crawling and performance

Stable

Grafana k6

Maintained by Grafana Labs and contributors

Open-source project · AGPL-3.0

A scriptable load-testing tool for APIs, storefront services, and performance-sensitive commerce workflows.

  • Checkout-service load tests
  • Pre-release capacity verification
Load testingPerformanceReliability

Reviewed 2026-07-25

Accessibility, security and privacy

Reference

Web Content Accessibility Guidelines 2.2

Maintained by W3C Web Accessibility Initiative

Open standard · W3C Recommendation

The W3C recommendation for accessible content, navigation, input, authentication, and target sizing across purchase journeys.

  • Accessibility acceptance criteria
  • Human verification beyond automated checks
AccessibilityComplianceUX

Reviewed 2026-07-25

Accessibility, security and privacy

Reference

OWASP Web Security Testing Guide

Maintained by OWASP Foundation and contributors

Open standard · CC BY-SA 4.0

A structured guide for testing web applications, authentication, authorization, sessions, input handling, and client-side security.

  • Storefront and account security reviews
  • Defining authorized security-test coverage
SecurityTesting guideOWASP

Reviewed 2026-07-25

Accessibility, security and privacy

Reference

OWASP Application Security Verification Standard

Maintained by OWASP Foundation and contributors

Open standard · CC BY-SA 4.0

A verification standard for defining and assessing application security controls at explicit assurance levels.

  • Security acceptance criteria
  • Scoping commerce application controls
SecurityVerificationOWASP

Reviewed 2026-07-25

Observability and incident response

Stable

OpenTelemetry JavaScript

Maintained by OpenTelemetry community

Open-source project · Apache-2.0

Vendor-neutral instrumentation for traces, metrics, and logs across commerce applications and supporting services.

  • Checkout-service tracing
  • Incident and reliability evidence
ObservabilityReliabilityTracing

Reviewed 2026-07-25

Observability and incident response

Stable

Sentry JavaScript SDKs

Maintained by Sentry and contributors

Open-source project · MIT

Open-source browser and server SDKs for error capture, tracing, performance context, and debugging workflows.

  • Storefront error evidence
  • Release and transaction diagnostics
ErrorsTracingJavaScript

Reviewed 2026-07-25

Observability and incident response

Stable

Prometheus

Maintained by Prometheus community and CNCF

Open-source project · Apache-2.0

A monitoring and alerting system built around dimensional time-series metrics and a flexible query language.

  • Commerce-service health metrics
  • Alerting on operational regressions
MetricsMonitoringAlerts

Reviewed 2026-07-25

Observability and incident response

Reference

OpenTelemetry semantic conventions

Maintained by OpenTelemetry community

Open standard · Apache-2.0 specification repository

Shared naming and attribute conventions that make telemetry comparable across services, frameworks, and vendors.

  • Consistent commerce telemetry
  • Cross-service trace and metric review
TelemetryConventionsObservability

Reviewed 2026-07-25

Discovery, SEO and GEO

Emerging

Beseam AI Visibility Scan

Maintained by Beseam

Beseam project · Hosted tool; not presented as open source

A focused entry point for checking how configured AI surfaces describe a commerce brand at a point in time.

  • Initial AI visibility review
  • Starting evidence for a commerce investigation
AI visibilityGEOBeseam

Reviewed 2026-07-25