zio Page Metadata
The field rules are provided verbatim in the backfilling agent's instructions (single source of
truth: references/rules.md). They carry the description length and register, the keywords count,
casing and block-list form, and the editing mechanics that keep an existing frontmatter block intact.
Nothing mounts this skill today: src/metadata.ts imports the reference directly, because a
single-purpose agent needs it on turn 1 of every run and progressive disclosure would only add a turn
and a way to skip it. The directory is a skill so that a consumer which needs it sometimes can
mount it without moving any content.
The full four-field frontmatter contract lives in src/subagents/drafter.md, which authors pages
from scratch. This skill deliberately restates only the two fields a backfill writes — the two
readers need different prose, and drafter.md is the named owner of anything they share.