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42 lines
2.2 KiB
Markdown
42 lines
2.2 KiB
Markdown
# Scoped Registration
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The [scope package](../../packages/core/scope) supplies the identity and carrier vocabulary that makes one registration context mean both per-agent visibility and shared lifetime ownership. It is a library primitive rather than a Cordis service; the [agent-scope runtime-design Agent Note](../../.agents/notes/implemented/architecture/2026-07-12-agent-scope-runtime-design.md#scope-routing-one-opaque-key-selects-one-layer) owns the implementation rationale, while the package [README](../../packages/core/scope/README.md) owns the callable API and filtering semantics.
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Source: [`packages/core/scope/src/index.ts`](../../packages/core/scope/src/index.ts).
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## Identity and dispatch carrier
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`ScopeKey` is an opaque object identity. The shipped loop uses the live `Agent` object as its own key, but the primitive never inspects the object.
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```ts type-equiv
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/** An opaque, identity-compared scope key. */
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type ScopeKey = object
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```
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`Scoped<T>` is the compile-time brand on the opaque routing receiver returned by `scopeTarget(base, key)`. Scope-filtered event declarations require this carrier as their `this` type, while the real event subject remains an explicit argument.
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```ts type-equiv
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/**
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* A routing-only event receiver built by {@link scopeTarget}. The type
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* parameter records the subject type for dispatch checking; the carrier does
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* not expose the subject's properties. Event payloads carry the real subject.
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*/
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type Scoped<T extends object> = object & { readonly [ScopedBrand]: T }
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```
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## Owned registration context
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`Scope` pairs the tagged registration context with two teardown surfaces. `rawDispose` preserves the exact Cordis disposer identity needed by an ordered composite effect; `dispose()` is the public shared quiescence boundary for direct and racing callers.
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```ts type-equiv
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/** A minted registration scope and its quiescent disposal boundaries. */
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interface Scope {
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/** Context through which scope-owned registrations are made. */
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ctx: Context
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/** Exact Cordis disposer, used when nesting this scope in an ordered composite effect. */
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rawDispose: () => Promise<void> | void
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/** Dispose every scope-owned registration; racing calls await the same completion. */
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dispose(): Promise<void>
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}
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```
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