Content
77%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a strong, highly actionable skill that teaches a novel transpiler syntax not in Claude's training data. Its greatest strength is the concrete, executable examples throughout and the practical gotchas sections that prevent common errors. The main weakness is that the body contains too much inline directive documentation that should be deferred to the referenced xvcl-directives.md, making the SKILL.md longer than necessary for an overview document.
Suggestions
Move the detailed directive syntax examples (constants, loops, functions, macros, conditionals, includes) to the referenced xvcl-directives.md and keep only a brief cheat-sheet table or 1-2 line summaries in SKILL.md to improve conciseness and progressive disclosure.
Remove the duplicate advice about preferring tables over if-chains — it appears both in the Tables section and in Common Mistakes. Keep it in one place only.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is mostly efficient and covers a lot of ground, but there's some redundancy — the table pattern advice is stated twice (in the Tables section and again in Common Mistakes), and some explanations like 'Constants are compile-time only' could be tighter. The VCL Gotchas section adds valuable non-obvious knowledge, but the overall document is quite long for a SKILL.md that should be an overview pointing to references. | 2 / 3 |
Actionability | Excellent actionability throughout — executable bash commands for compilation and testing, complete working XVCL examples with proper syntax, concrete code for every directive, and specific patterns like the table-based redirects. The minimal working example is copy-paste ready and the Common Mistakes section provides exact wrong/right patterns. | 3 / 3 |
Workflow Clarity | The Quick Start section provides a clear compile → lint → simulate → test workflow. The instruction 'When the user asks to run locally, always compile and run falco simulate' is an explicit checkpoint. Common Mistakes and VCL Gotchas serve as validation guidance. The workflow is simple enough that the linear sequence with explicit tool commands is sufficient. | 3 / 3 |
Progressive Disclosure | The references table at the bottom is well-organized with clear 'Use when...' guidance, and the xvcl-directives.md reference is properly signaled. However, the SKILL.md itself contains extensive inline directive documentation (constants, loops, functions, macros, conditionals, includes) that largely duplicates what should be in the referenced xvcl-directives.md file. The main body could be significantly shorter by keeping only the most essential syntax and deferring details to references. | 2 / 3 |
Total | 10 / 12 Passed |