docs: reserve seam for complete capabilities
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English | [中文](README.zh.md)
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Slot registry pure core, slot terminal design: SlotMap declaration merging, the single `register` composition API on SlotCore, the four-share component-props type family, the store-seat type family, and the renderer install-seam contract. React types only at runtime — the package is React-free and cordis-free.
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Slot registry pure core, slot terminal design: SlotMap declaration merging, the single `register` composition API on SlotCore, the four-share component-props type family, the store-seat type family, and the renderer installation contract. React types only at runtime — the package is React-free and cordis-free.
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One `register({ name, children?, store?, inject?, ...kind }, Component)` call contributes a component into a declared slot and, in the same breath, declares child slots (declaration = render authorization = runtime spec, one table), a store seat, and the registrant's business face. The component is checked at the call site against `ComposedProps` — the intersection of four shares, each derived from its single source of truth:
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@@ -17,9 +17,9 @@ Chain-kind slots invert keyed routing — entries self-nominate instead of the d
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The standard-kit interfaces (`SessionStandardProps`, `GlobalStandardProps`) are declared empty here and merged by the runtime package (same declare-merge pattern as SlotMap keys). The renderer binds the runtime's session and workspace observable sources into selector hooks. Inject factory parameters derive from the declaration (`InjectParams`): session slots get `sessionId`, a declared store appends baked `actions`, nothing else — data access lives in the apply closure's ctx.
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The store family (`defineStore` spec in / `StoreHandle<T, A>` out) types the store seat: `init` infers the state schema, `actions` is the complete draft-transform write set, `BakedActions` strips the draft parameter into the callbacks components and inject factories receive. The `defineStore` value implementation lives in the runtime package (the engine's home) and satisfies the `DefineStore` contract exported here. Engine products and the renderer host contract carry bare snapshot sources (`getSnapshot`/`subscribe`), never React hooks — hook binding is the render machinery's side of the seam; only the props-contract hook type (`SnapshotSelectorHook`) lives here.
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The store family (`defineStore` spec in / `StoreHandle<T, A>` out) types the store seat: `init` infers the state schema, `actions` is the complete draft-transform write set, `BakedActions` strips the draft parameter into the callbacks components and inject factories receive. The `defineStore` value implementation lives in the runtime package (the engine's home) and satisfies the `DefineStore` contract exported here. Engine products and the renderer host contract carry bare snapshot sources (`getSnapshot`/`subscribe`), never React hooks — hook binding belongs to the render machinery; only the props-contract hook type (`SnapshotSelectorHook`) lives here.
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`SlotCore` seeds the a-priori `'root'` slot at construction and enforces load-time validation (undeclared-slot registration, duplicate child declaration, one shared handle under two scopes, a chain registration without `select` — all throw at register). An entry's disposer collapses its declared child slots recursively: ledger rows, contributions, and store mounts die on one lifecycle axis. Each key also carries a declaration epoch that advances only on declaration and collapse; the runtime uses it for [`ctx.slots.inject`](../runtime/README.md#slot-declaration-injection), independently from ordinary entry versions. `renderer.ts` carries the install seam (`SlotRenderer`, `SlotRendererHost`) plus `StaleAuthorizationError`/`SlotOwnershipError`; the implementation lives in web-react, the installation in the shell boot.
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`SlotCore` seeds the a-priori `'root'` slot at construction and enforces load-time validation (undeclared-slot registration, duplicate child declaration, one shared handle under two scopes, a chain registration without `select` — all throw at register). An entry's disposer collapses its declared child slots recursively: ledger rows, contributions, and store mounts die on one lifecycle axis. Each key also carries a declaration epoch that advances only on declaration and collapse; the runtime uses it for [`ctx.slots.inject`](../runtime/README.md#slot-declaration-injection), independently from ordinary entry versions. `renderer.ts` carries the installation contract (`SlotRenderer`, `SlotRendererHost`) plus `StaleAuthorizationError`/`SlotOwnershipError`; the implementation lives in web-react, the installation in the shell boot.
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## Model Experience
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