Enforce resolved execution context for deterministic actor policy

src/agents/manifest.ts

@@ -11,6 +11,7 @@ export type ManifestPersona = {
   id: string;
   displayName: string;
   systemPromptTemplate: string;
+  modelConstraint?: string;
   toolClearance: ToolClearancePolicy;
 };
 
@@ -147,10 +148,21 @@ function parsePersona(value: unknown): ManifestPersona {
     throw new Error("Manifest persona entry must be an object.");
   }
 
+  const modelConstraintRaw = value.modelConstraint;
+  if (
+    modelConstraintRaw !== undefined &&
+    (typeof modelConstraintRaw !== "string" || modelConstraintRaw.trim().length === 0)
+  ) {
+    throw new Error('Manifest persona field "modelConstraint" must be a non-empty string when provided.');
+  }
+
   return {
     id: readString(value, "id"),
     displayName: readString(value, "displayName"),
     systemPromptTemplate: readString(value, "systemPromptTemplate"),
+    ...(typeof modelConstraintRaw === "string"
+      ? { modelConstraint: modelConstraintRaw.trim() }
+      : {}),
     toolClearance: parseToolClearance(value.toolClearance),
   };
 }