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When the user wants to plan, evaluate, or build a free tool for marketing purposes — lead generation, SEO value, or brand awareness. Also use when the user mentions "engineering as marketing," "free tool," "marketing tool," "calculator," "generator," "interactive tool," "lead gen tool," "build a tool for leads," "free resource," "ROI calculator," "grader tool," "audit tool," "should I build a free tool," or "tools for lead gen." Use this whenever someone wants to build something useful and give
Passed 15 of 22 test cases with the skill, and 10 of 22 without it.
and 8 more in the full report
6 fixed9 passed either way6 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.
A developer tool company curated a searchable database of 500 open-source SVG icons and UI code snippets for frontend engineers. Which tool classification describes this resource, and what primary purpose does it serve?
| Checked | Without skill | With skill |
|---|---|---|
| Classifies the curated code snippet and icon collection under Libraries. | Passed | Passed |
| Identifies providing reference material as the primary user purpose. | Missed | Passed |
The instructions your model reads when the skill loads.
| Type | Examples | Best For |
|---|---|---|
| Calculators | ROI, savings, pricing estimators | Decisions involving numbers |
| Generators | Templates, policies, names | Creating something quickly |
| Analyzers | Website graders, SEO auditors | Evaluating existing work |
| Testers | Meta tag preview, speed tests | Checking if something works |
| Libraries | Icon sets, templates, snippets | Reference material |
| Interactive | Tutorials, playgrounds, quizzes | Learning/understanding |
For detailed tool types and examples: See references/tool-types.md
What problems does your audience Google? - Search query research, common questions
What manual processes are tedious? - Spreadsheet tasks, repetitive calculations
What do they need before buying your product? - Assessments, planning, comparisons
What information do they wish they had? - Data they can't easily access, benchmarks
test cases passed, vs 10 / 22 without
Published skills whose descriptions closely match this one, with their headline benchmark lift.
More skills from the same source and nearby in the registry, with their headline benchmark lift.