Add interface-oriented client sessions and headless capability access (WI-07)

src/execution-world/installation.ts

@@ -9,6 +9,7 @@ import {
   type PublicOperationContract,
   type PublicQueryContract,
 } from "./client-contracts.js";
+import { resultInterfaces } from "./projections.js";
 
 /** Activation is assigned by graph authority, never by a package artifact. */
 export interface ActiveExecutionIdentity {
@@ -23,6 +24,7 @@ export interface ExecutionGroupIdentity {
   readonly executionDigest: string;
 }
 export interface ClientContractCatalog {
+  readonly resultInterfaces: Readonly<Record<string, readonly string[]>>;
   readonly operations: readonly PublicOperationContract[];
   readonly queries: readonly PublicQueryContract[];
   readonly components: readonly InstalledComponent[];
@@ -58,6 +60,9 @@ export function clientContractCatalog(
       ),
     );
   return {
+    resultInterfaces: Object.fromEntries(
+      plan.definition.operations.map((operation) => [operation.key, resultInterfaces(plan, operation.key)]),
+    ),
     operations,
     queries: packages.flatMap((pkg) =>
       (pkg.checkedQueries ?? []).map((q) => publicQueryContract(pkg, q.declaration.id)),