giles b3804ce712 host: relations-as-posts slice 1 — declaration-driven candidate pools ...

Types declare which relation they anchor (type declares is-a/subtype-of, tag
declares tagged) via a 'declares' edge; the picker's candidate set is the
down-closure of a relation's anchors through is-a ∪ subtype-of. So is-a/subtype-of
now offer the WHOLE type closure — the roots (type/tag/article) AND instances —
fixing the wrinkle where only instances showed and you could never pick 'tag' or
'article' as a type. 'related' has no anchor → every post.

Replaces the hardcoded :candidates "types"/"tags"/"all" with graph queries
(host/blog--reach-down + the declares edges). Design + roadmap (relations as
first-class posts, typed relations, type algebra, constraints) in
plans/relations-as-posts.md.

host conformance 283/283 (+5: is-a pool includes type roots, excludes plain posts,
tagged anchored by tag, related = all, is-a relate-options offers Article).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-29 21:40:27 +00:00

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