Deep dive into TWiki as the file-based Perl counterpoint to XWiki: flat-file +
RCS store (data/<Web>/<Topic>.txt), Webs/Topics, TWiki Forms storing fields as
%META% in the topic text, TWikiML/variables, TWiki::Func API; the plugin handler
callback surface (initPlugin, commonTagsHandler, before/afterSaveHandler,
afterRenameHandler, REST handlers) and package types (Plugin/Skin/AddOn/Contrib);
per-topic ALLOW/DENY access control (origin of yawex's model); Foswiki fork.
Catalog (now 41 UCs):
- UC-40 attach a file-backed engine's on-disk store directly (dual-path attach)
- UC-41 import an engine's native file history (RCS .txt,v) into the journal
- enrich UC-06 (TWiki per-topic ACL lineage), UC-34 (file-embedded %META%),
UC-36 (RCS-import vs DB-supplement), UC-38 (TWiki handlers as adapter host)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
