Deep dive into Foswiki focused on its deltas from TWiki (not the shared
lineage): the pluggable Foswiki::Store backend (RcsWrap/RcsLite/PlainFile)
behind a versioned interface via Foswiki::Meta, the OO/MVC core rewrite,
Foswiki::Func + registerTagHandler, DataForms + MetaDataPlugin multi-record,
and WysiwygPlugin TML<->HTML round-trip. The store abstraction is logged as
prior art for shard-wiki's own adapter contract (SHARD-WP-0002).
Catalog (now 43 UCs):
- UC-42 read/write a non-Markdown shard via lossless syntax translation
(Markdown-first for prose; Foswiki WysiwygPlugin is proof)
- UC-43 tolerate a shard's storage-backend swap (RCS<->PlainFile) under a
stable identity
- enrich UC-39 (multi-record metadata) and UC-40 (PlainFile direct-attach)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
