Complete prepared presentation build and runtime integration

src/capability-language/assembly.ts

@@ -46,7 +46,7 @@ export type CapabilityRepositoryResolver = (
 /** An explicitly selected build frontend supplies ordinary query sources. The
  * assembler never chooses a frontend by inspecting an interface/contract ID.
  * Generated sources go through the same query and imported-fragment checks. */
-export type PackageQueryGenerator = (input: {
+export type PackageQueryGenerator = ((input: {
   readonly package: Readonly<PackageRevision>;
   readonly interfaces: readonly InterfaceRevision[];
   readonly readSource: (name: string) => Promise<string>;
@@ -54,7 +54,12 @@ export type PackageQueryGenerator = (input: {
   readonly queries: readonly QueryDeclaration[];
   readonly documents: ReadonlyMap<string, string>;
   readonly compositions?: readonly QueryComposition[];
-}>;
+  readonly artifacts?: Readonly<Record<string, unknown>>;
+}>) & {
+  /** Optional explicit frontend stage after workspace binding resolution.
+   * Its output still passes normal workspace/query validation. */
+  completeWorkspace?: (workspace: WorkspaceRevision) => Promise<void>;
+};
 
 export type ResolvedCapabilityResource = {
   key: string;
@@ -297,6 +302,7 @@ const createResourceGraphResolver = (
             readSource: (name) => readRepositorySource(snapshot.directory, name),
           });
           if (generated) {
+            if (generated.artifacts) compiled.resource.revision.buildArtifacts = structuredClone(generated.artifacts);
             const queries = [...(compiled.resource.revision.queries ?? [])];
             for (const query of generated.queries) {
               if (queries.some((entry) => entry.id === query.id || entry.displayName === query.displayName))
@@ -534,6 +540,7 @@ export const compileWorkspaceRepository = async (options: {
         : {}),
     ...(options.sourceRootCommit ? { sourceRootCommit: options.sourceRootCommit } : {}),
   };
+  await options.generateQueries?.completeWorkspace?.(workspace);
   const checked = compileWorkspaceRevision(workspace);
   if (!checked.ok) {
     throw new Error(