Xvcl
fastly/fastly-agent-toolkit/skills/xvclby fastly6db70eaf54ba885d56091861224987d6cf06c429No license34 starsListed Oct 9, 2026Updated Oct 9, 2026Repository updated 2 days ago
Extends Fastly VCL with loops, functions, constants, macros, conditionals, and includes via XVCL — a VCL transpiler that compiles .xvcl files into standard VCL. Use when writing VCL for Fastly, working with .xvcl files, generating repetitive VCL (multiple backends, routing rules, headers) with loops, defining reusable VCL functions with return values, using compile-time constants instead of magic numbers, or writing any Fastly VCL configuration. XVCL syntax is not in training data so this skill is required. Also applies when writing and testing VCL locally (compile with `uvx xvcl`, test with falco), reducing VCL code duplication, splitting large VCL into modular includes, or doing any VCL development task for Fastly — even without explicitly mentioning XVCL.
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npx @sourceweft/cli skills install @fastly/xvclAdd --agent claude-code, codex, cursor or universal to choose which agent gets it (Claude Code by default).
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npx skills add https://github.com/fastly/fastly-agent-toolkit/tree/6db70eaf54ba885d56091861224987d6cf06c429/skills/xvclSource and attribution
Source:fastly/fastly-agent-toolkitinskills/xvclat commit6db70ea
License: No license
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