The Sigma Foundry blog
Practical guides for the business side: government contracting, selling online, AI that does real work, and tax and money.
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Answer Engine Optimization by Business Type: Three Architectures
How Sigma Foundry would build answer engine optimization for a local service business, an online seller and a B2B firm or government contractor.
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How the Claude Certified Architect – Professional (CCAR-P) exam is structured
CCAR-P exam structure explained: 63 items in 120 minutes, seven weighted domains, the anti-patterns behind wrong answers, and a study plan built on timed mocks.
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How the Claude Certified Architect – Foundations (CCAR-F) exam is structured
CCAR-F exam structure explained: 60 items in 120 minutes, 4 of 6 scenarios, five weighted domains, the anti-patterns it tests, and a practical study plan.
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How much does Etsy take per sale in 2026?
Etsy takes about 14% of a $10 US digital sale, or 29% with an Offsite Ad. Every 2026 fee, what it's charged on, and two worked examples.
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CMMC Phase II is suspended: what still applies to small defense contractors?
CMMC Phase II is on hold, but Phase I self-assessments still apply. What changed, how SPRS scoring works, a worked example, and what to do this month.
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Will my business still be small under SBA's proposed size standards?
SBA's Aug 2026 proposal raises many size standards and cuts none. See what changes, a worked example, and how to comment before the Nov 20 deadline.
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Context Engineering: Why Your AI Writes Bad Code (And How to Fix It)
Vibe coding offloads thinking. Context engineering keeps you in control. Learn the formula that separates working AI code from broken AI code.
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How to Write for AI Agents While Keeping Humans Engaged
You want humans to feel something. You want AI agents to understand something.
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What Is a Truth Layer — And Does Your Business Have One?
May 21, 2026 6 minutes truth layer marketing agent-legible content, AI-readable product pages, structured data marketing
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The Two Internets Strategy: How to Win on Both Human & AI Internet
two internets marketing strategy human-facing agent-facing content, dual-layer optimization