Lints, tests, simulates, and formats Fastly VCL code using the falco tool. Also serves as the authoritative VCL reference via the falco Go source, which implements Fastly's full VCL dialect. Use when validating VCL syntax, running VCL linting, testing VCL locally, simulating VCL request handling, formatting VCL files, writing VCL unit tests with assertions, debugging VCL logic errors, looking up…
Install
npx skills add fastly/fastly-agent-toolkit --skill falconpx skills add fastly/fastly-agent-toolkit --skill falco -a claude-code -gnpx skills add fastly/fastly-agent-toolkit --skill falco -a codex -ggemini skills install https://github.com/fastly/fastly-agent-toolkit.git --path skills/falcogh skill install fastly/fastly-agent-toolkit falcogit clone --depth 1 https://github.com/fastly/fastly-agent-toolkit /tmp/fastly__fastly-agent-toolkit
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/fastly__fastly-agent-toolkit/skills/falco ~/.claude/skills/falco # Claude Code
cp -R /tmp/fastly__fastly-agent-toolkit/skills/falco ~/.agents/skills/falco # Codex, Cursor, Gemini CLI, Copilot, OpenCode