For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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Product GuidesEnforcer GuidesMobile SDKAPI ReferenceCustomer support
Product GuidesEnforcer GuidesMobile SDKAPI ReferenceCustomer support
  • General
    • About Enforcers
    • Support first-party HUMAN calls
    • Troubleshoot Enforcer configurations
  • Enforcer frameworks
    • Akamai ESI
    • Apache - C Module
    • ASP.NET
    • Callout Enforcer
    • Envoy Proxy
    • F5 BIGIP
    • Fastly JavaScript Compute@Edge
      • Fastly VCL changelog
    • Google Cloud Platform (GCP) Callout Enforcer
    • Kong Plugin
    • NGINX - C Module
    • NGINX - LUA Module
    • PHP
    • Python
    • Ruby
    • Salesforce Commerce Cloud Cartridge
Enforcer frameworksFastly VCL

Fastly VCL changelog

April 27, 2026
April 27, 2026

Version 12.4.2

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