Write or review the documentation for a Go package under internal/ to the kitsoki standard. Use when adding a new package, when a package's doc.go / exported-symbol comments / runnable examples need writing or auditing, or when the user asks "is this package documented well", "bring this up to the doc standard", or "review the docs for <pkg>". Covers the eight-point rubric (doc.go, sections, non-goals, per-symbol "why", contracts, named constants, Example tests, live references), the paragon to copy, and the verification commands.