The block editor now edits the object's ONE root composition (:body) as three block kinds —
CARD (a ref leaf, the "and"/content), CONDITIONAL (alt+when, the "or": render the first
branch whose live-context condition holds), and REPEATER (each: render a template per graph
query). The render-fold already interprets seq/alt/when/each/ref, so authored compositions
render for free; this adds the editing model + UI.
ADDRESSING (per the design discussion — refs are IPNS-like, not frozen CIDs): refs are
RELATIVE-STORED + RESOLVE-IN-CONTEXT. A :body stores (ref "body__b0") (field-relative); the
render context carries the CONTAINER (the object being rendered) and the resolver combines
them -> the card's storage slug <container>__<field>__<name>. So a body is portable (doesn't
pin the container's name), and editing a card updates everything that refs it for free (no
cascade). A cross-domain ref is absolute with an authority ("market:…"); the resolver
dispatches on the prefix (local today, fetch_data/AP later). A compat shim resolves an older
absolute ref directly. (Snapshot-to-absolute-CID stays a future on-demand op; the CID —
hash(record incl :body) — is the immutable layer over this naming layer.)
MODEL: host/blog--{card-slug,resolve-ref,slug->ref,new-card!,node-kind,node-refs,node-pred,
node-each-type,cond->pred,pred->ckey}; block-add!/add-cond!/add-each!; index-addressed
block-move-idx!/remove-idx!/set-cond! (alt/each aren't single refs). UI: host/blog--block-row
renders by kind (card / "if <cond> → … else → …" / "for each <type> → …") with a condition
<select> + ✎ links to each card's own /<cslug>/edit (external object, CID-neutral). Routes:
POST /:slug/blocks/{add, add-cond, add-each, :idx/{move,remove,cond}}.
Types-define-structure is the next layer (a type declares its composition field(s) + block
grammar). Full host conformance 399/399 (blog 170, incl. 5 new and/or/each tests: add-cond/
add-each/set-cond, a conditional rendering the context-chosen branch, the 3-form editor).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
giles
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