ekklesiaandClaude Opus 5
8d651c427d
ADR 0021 established that a module may own UI and added a statically
validated, never-executed `entrypoints.ui` path, but deliberately left
five questions open: what the artifact exports, what a host provides,
how one artifact runs under both Ekklesia and a standalone host, what
the browser-side trust model is, and how module UI avoids being welded
to a Dashboard that does not exist. This answers them.
React and TypeScript are the supported module UI authoring model. The
repository already leaned this way: `packages/typescript-config` ships a
`browser.json` preset and a `react-native.json` preset with
`"jsx": "react-jsx"`, and ADR 0002 names browser and React Native
configurations. One framework is supported; every other stays rejected.
React is deliberately not part of the contract. A module's compiled
artifact default-exports `defineModuleUi({ id, version, mount })`, and
`mount(container, context)` takes a DOM element and returns an unmount
function. `id` and `version` are build-artifact identity markers a host
verifies against the manifest, mirroring `defineModuleRuntime` exactly.
A host needs an element and a context, never a matching rendering
library, so a module's framework, a host's framework, and the platform
boundary between them stay independent.
The contract lives in a new `@ekklesia/module-ui-sdk` rather than in
`@ekklesia/module-sdk`, for a concrete reason: that package re-exports
all of `@ekklesia/contracts`, so routing module UI through it would drag
Zod, Drizzle, and semver into every browser bundle. The new package has
no runtime dependencies, and its one dependency on contracts is
type-only — the emitted `host-context.js` is `export {};`, and a test
pins that so it cannot regress.
The host context is four members: `moduleId`, `api`, `principal`, and
`permissions`. Navigation, theme, module configuration, organization
context, and diagnostics are deliberately absent; each needs a design
that does not exist. Module UI reaches its backend through
`api.request(path)` with a path relative to its own API root and never
constructs `/api/v1/modules/<id>/...`, which is Ekklesia's private
deployment detail — a module that builds that URL is silently unhostable
anywhere else. One fixture artifact is mounted under two hosts with
different origins and URL shapes to prove it.
Client-side permission hints are presentation only, and both the docs
and a test say so plainly: a denied hint does not stop the module from
calling its API, because server-side `requirePermission` is the only
authority. Module UI is trusted code in the host's own browser realm —
no iframe, no sandbox — which matches the backend model rather than
overstating it, since a module's server half already holds the API's
database authority.
The boundary guard is narrowed precisely, not removed: `.tsx`, `react`,
and `react-dom` are un-denied and modules may depend on the new
`module-ui-sdk` role. `.jsx`, `.css`, every other framework,
`react-router-dom`, `react-native`, and `@vitejs/plugin-react` stay
denied, layer rules are untouched, and an unsupported framework aliased
behind an allowed name (`"react": "npm:vue@3"`) is resolved and rejected
by its real target. Fixtures prove each case, including that module UI
source still cannot import Core.
Core, apps/api, and the manifest contract are untouched. Discovery still
validates the `entrypoints.ui` path and never evaluates it; hosts
perform their own dynamic import and validate the result with
`parseModuleUiExport`. No Dashboard shell, UI runtime, navigation,
grouping, standalone host, build or styling pipeline, installer,
hot-loading, or feature module is added.
Co-Authored-By: Claude Opus 5 <[email protected]>
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Architecture decision records
ADRs capture durable choices that affect more than one package or phase.
- Filenames use a four-digit sequence followed by a short kebab-case title.
- Status is
Proposed,Accepted,Superseded, orRejected. - Accepted ADRs are immutable except for status and cross-reference corrections.
- A changed decision receives a new ADR that links to and supersedes the old one.
Index
- 0001: Four-layer platform boundary — Accepted
- 0002: pnpm workspace and strict TypeScript — Accepted
- 0003: Development infrastructure — Accepted
- 0004: Replace unmaintained MinIO baseline — Accepted
- 0005: Static module manifests and atomic discovery — Superseded
- 0006: Versioned capabilities and compiled module runtime — Accepted
- 0007: Module-owned Drizzle schemas and table isolation — Accepted
- 0008: Module-owned migration contracts and offline validation — Accepted
- 0009: Transactional module migration execution — Accepted
- 0010: Core identity architecture and Better Auth adoption — Accepted
- 0011: Identity HTTP transport and public enrollment policy — Accepted
- 0012: Production-equivalent identity origin/CSRF protection under test — Accepted
- 0013: Core authorization, permission registry, and platform-owner bootstrap — Accepted
- 0014: Module permission declarations and platform permission registry — Accepted
- 0015: Static module HTTP routing and production runtime lifecycle — Accepted
- 0016: Module database access — Accepted
- 0017: Public request perimeter hardening — client address, signup gating, body limits, timeouts — Accepted
- 0018: Identity session resolution, canonical public origins, and PostgreSQL transport policy — Accepted
- 0019: Durable authorization history and grant management — Accepted
- 0020: Module runtime and migration execution hardening — Accepted
- 0021: Modules as independently hostable products — Accepted
- 0022: Module UI authoring model and host contract — Accepted