Building Claude Code: How We Use Skills (4 minute read)

Anthropic's internal framework treats AI "skills" as functional folders containing scripts and assets rather than static text, using the file system for context engineering. Nine core categories emerged, with product verification and "Gotchas" sections identified as the highest-leverage components for improving output reliability. This shift toward progressive disclosure allows agents to fetch specific data and runbooks only when needed, reducing context noise and error rates.