Org lead's correction, and it changes what this phase ships.
TEAMS.md §3.1 and §3.5 put four public pages and three nav rows in core. They
should never have been core's. **Teams is the platform primitive that the API
contract exposes; the module builds the pages on top of it.** module-uo builds
guilds; the Rust module that comes next builds clans. Core does not own the word
for a Team, so a core page under a noun core invented would have sat beside
module-uo's existing /uo/guilds saying the same thing in the wrong vocabulary.
Removed: /teams, /teams/:slug, /teams/:slug/roster, /player/teams, the public
and portal nav rows, the `teams` feature flag and the core feature provider that
answered it. /admin/teams stays — an operator inspecting the primitive is
looking at the primitive.
Kept, and unchanged: the tables, the reconciler, the access resolver, the
activity feed, the retention prune, the whole public/player/admin API,
optionalAuth and the roster projection. That is the contract, and it is what
this phase was actually for.
**So the extension slots invert, which is a new direction in MODULE_API §3.7.**
`team.overview` and `team.member.row` assumed core rendered the page. In their
place `registry.declareModuleSlot(id, name)` lets a MODULE declare a place on
its own page and core fill it. Core fills `uo.guild.detail` with the Team
activity feed — the one part of that page core cannot hand over, because only
core can resolve whether the viewer is inside the Team and the public/members
split is a security boundary.
Three things about the inverted direction are load-bearing:
- the name is namespaced under the declaring module and that is enforced, not
conventional: it is the only thing keeping two modules off one name;
- core's fills are applied at MOUNT rather than eagerly. Core's bundle
evaluates before every module chunk, so when core registers a fill the slot
does not exist yet — filling eagerly would silently do nothing;
- a fill for a slot nobody declared is a no-op, never an error. The declaring
module is simply not installed, which is the ordinary case. That is the
opposite of §3.7, where an unknown slot throws, and the asymmetry is real:
there, core declares first, so an unknown name is always a typo.
`Slot` becomes the eighth member of the shared UI kit, so a module renders the
place with core's own error boundary. It matters more here than anywhere else in
the kit: the thing being contained is core's content failing inside the module's
page.
`GET /public/teams/by-external/:moduleId/:externalId` is added because a module
names a Team in its own vocabulary and core keys the feed by slug. The module id
is matched rather than trusted — an external id is unique only within a module.
Co-Authored-By: Claude <noreply@anthropic.com>
The client twin of the server's declareSlot/registerExtension, and the same rule
in both halves: core declares a slot, only core declares one, and at most one
module fills it. Core renders <Slot name> and gets nothing back when the slot is
unfilled, so an instance with no module installed renders exactly what it
rendered before -- the same untouched-path guarantee withModuleNav makes.
A slot is named for a PLACE, never for a meaning. Core supplies the position and
the styling; the label, the target, the data and whether anything renders at all
are the module's. The moment core types a slot by its content it has re-acquired
the game semantics phase 3 exists to remove.
This is the one place the client registry is not fail-open. An unknown slot, a
non-component and a second fill all throw, matching checkExtensionShape
server-side, because a dropped nav row costs a link the viewer can reach another
way while a silently dropped extension is invisible to everyone including its
author. A throw is always a programming error and never a race: core declares in
its own bundle and every module chunk is a deferred script injected after it.
Reading stays fail-safe -- undeclared and unfilled both read null -- and a
filling component renders inside an error boundary. That asymmetry is where the
client differs from the server: a module route that throws costs the module's own
page, but an extension throws inside CORE's, and the whole reason core keeps
ownership of that page is that it stays usable.
Core decorates a slot through <Slot wrap>, not by asking whether it is filled.
The obvious alternative is right about the unfilled case and wrong about the
failed one -- the extension is filled, so the separator renders, and then the
component throws into the boundary and leaves the separator behind on its own.
wrap puts core's decoration inside the boundary where it shares the extension's
fate. Found in a browser, with the footer's separator, which is the only place
either could have been found.
MODULE_API_VERSION 1.1.0 -> 1.2.0, both halves: the two state ONE version.
Contract: docs/website/MODULE_API.md 3.7.
Co-Authored-By: Claude <noreply@anthropic.com>
