feat(ql3): establish 3.0 incubation baseline

back/runtime/ports/localExecutionContextMaterializer.ts

@@ -0,0 +1,21 @@
+import type { ExecutionContext } from '../domain/execution';
+import type { RunDispatchCandidate } from '../domain/runDispatchCandidate';
+
+export interface LocalExecutionContextRequest {
+  candidate: Readonly<RunDispatchCandidate>;
+  contextRef: string;
+}
+
+export interface MaterializedLocalExecutionContext {
+  context: ExecutionContext;
+  /** Opaque bounded reference persisted on the Attempt before spawn. */
+  logArtifactId?: string;
+  /** Optional non-blocking cleanup; plaintext capability values must not leak. */
+  dispose?: () => void | Promise<void>;
+}
+
+export interface LocalExecutionContextMaterializer {
+  prepare(
+    request: Readonly<LocalExecutionContextRequest>,
+  ): Promise<MaterializedLocalExecutionContext | null>;
+}