Every skillbook is either a reference (what you know) or a guide (what you do). Pair them and your agent gains real domain expertise — with citations, micropayments, and structured navigation. No retraining required.
Browse the Catalog →Every piece of expert knowledge is either what you know or what you do. The magic happens when your agent can draw on both.
Source material, regulations, encyclopedias, complete works. The authoritative facts. A reference doesn’t tell you what to do — it is the knowledge.
Examples: EPA 608, FDA Food Code, Tax Codes, Building Standards
Methodologies, frameworks, checklists, processes. The structured approach to applying knowledge. A guide doesn’t contain the facts — it tells you how to use them.
Examples: Onboarding Checklist, Exam Prep Method, Compliance Audit, Code Review Checklist
EU AI Act (reference) + Compliance Audit (guide) = an agent that can assess your AI system against the actual regulation, citing specific articles. Neither skillbook alone could do that.
Every skillbook starts with a SKILL.md file — a free, public storefront. It declares the type (reference or guide), the table of contents, and navigation instructions.
The skillbook-type field in SKILL.md frontmatter and skillbook.type in package.json must both be present and match — either "reference" or "guide".
Agents interact with skillbooks over plain HTTP. No special protocol. The type field tells the agent exactly what kind of brain module it's reading.
Read the type, scope, and TOC. Free. No API key needed. Agent knows if this is a reference or guide.
Pick the relevant branch. For references: navigate to the right section. For guides: follow the methodology steps.
Each page costs microdollars. Agent reads only what it needs from either type.
Apply guide methodology to reference material. Return answers citing both sources.
Every skillbook is one type. Not both. This keeps content focused and makes composition powerful.
Is your knowledge source material (facts, regulations, works) or methodology (processes, frameworks, checklists)? Pick one.
Organize into atomic pages. Run creator tools to validate type field, links, and formatting.
Push to the catalog. Your skillbook composes with others of the opposite type to create capabilities.
Skillbooks use semantic versioning. Both references and guides follow the same versioning model.
Typo fixes, clarifications, source updates. Free for anyone who already purchased the page.
New pages, expanded coverage, restructured sections. May adjust per-page pricing.
Significant rewrites or new editions. Treated as a new book with independent pricing.
Your agent fetches exactly what it needs. You pay for what you load. References and guides use the same clean micropayment model.
1 credit = 1 microdollar = $0.001 USD
Derived from full book price ÷ total pages. Same for references and guides.
80% goes to the author.
20% goes to the platform.
Same split for both references and guides. Platform absorbs Stripe fees.