giles f5f4e93dcf host: Slice 8 — typed scalar fields on types + the generic, type-driven form ...

The keystone: a type declares :fields [{name, value-type, widget}], an instance carries
:field-values, and the SAME edit form is generated from the type definitions — no per-type
code. 'The editor maps onto the types.'

8a (field model): host/blog-value-types (String/Text/URL/Int/Date/Bool -> default widget),
host/blog--widget-for (explicit > value-type default > text), host/blog-fields-of +
--set-fields! (on the type-post, like schema), --fields-summary. Article seeded with
subtitle:String + hero:URL. /meta gains a Fields column. host/blog-type-defs (the subtype-of
hierarchy = type DEFINITIONS, vs instances-of = is-a instances).

8b (instance form): host/blog-field-values-of + --set-field-values!; host/blog--fields-for-post
(union of the post's transitive types' fields, deduped); host/blog--field-inputs (one labelled
input per field, widget per value-type, pre-filled). edit-form injects the Fields section
(durable reads pre-fetched); edit-submit reads field-* inputs via host/field and stores them.

Verified live-path (ephemeral, SX_SERVING_JIT=1): relate is-a article -> field inputs appear
-> save -> values persist. Blog suite 132/132.

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

2026-06-30 12:18:34 +00:00

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