refactor(architect): Use IPromptBuilder Interface for LLMValidator

packages/architect/src/architect.ts

@@ -9,7 +9,7 @@ export interface ProcessResult extends ValidationResult {
 }
 
 export class Architect {
-  private validator: LLMValidator;
+  public validator: LLMValidator;
   private timeDeltaGenerator: TimeDeltaGenerator;
 
   constructor(

packages/architect/src/index.ts

@@ -1,3 +1,4 @@
 export * from "./llm-validator.js";
+export * from "./llm-validator-prompt-builder.js";
 export * from "./architect.js";
 export * from "./delta.js";

packages/architect/src/llm-validator-prompt-builder.ts

@@ -0,0 +1,59 @@
+import { WorldState, serializeObjectiveWorldState } from "@omnia/core";
+import { Intent } from "@omnia/intent";
+import { hydrateObjective } from "@omnia/voice";
+import { PromptBreakdown, PromptComponent, IPromptBuilder } from "@omnia/llm";
+
+/**
+ * Prompt builder for the LLM Validator (World Architect).
+ * Separates prompt generation, structure, and component breakdowns.
+ */
+export class LLMValidatorPromptBuilder implements IPromptBuilder<
+  [WorldState, Intent]
+> {
+  build(worldState: WorldState, intent: Intent): PromptBreakdown {
+    const serializedWorld = serializeObjectiveWorldState(worldState);
+
+    const systemPrompt = `
+You are the World Architect, a deterministic and objective judge of reality, physics, and narration for a simulation game.
+Your task is to judge whether a proposed action (Intent) by an actor is physically and logically possible given the current objective state of the world.
+Exempt dialogue or speech actions from validation (consider them always valid).
+Enforce logical boundaries such as:
+- Spatial boundaries (an actor cannot grab an object in another location unless they are there).
+- Physical boundaries (an actor cannot open a locked drawer without a key or breaking it).
+- State Boundaries (an actor cannot perform a task if their state doesn't allow them to do so).
+- State/Attribute constraints.
+- An actor can perform actions on themselves as long as it follows the boundaries stated above.
+
+You must respond with a JSON object containing:
+- "isValid": boolean indicating if the action is possible/allowed.
+- "reason": a very short explanation of why the action is allowed or denied.
+`.trim();
+
+    const objectiveContent = hydrateObjective(intent.content, worldState);
+
+    const worldStateSection = `=== CURRENT WORLD STATE ===\nCurrent Time: ${worldState.clock.get().toISOString()}\nEntities & Attributes:\n${serializedWorld}`;
+    const proposedActionSection = `=== PROPOSED ACTION ===\nActor ID: ${intent.actorId}\nType: ${intent.type}\nContent: "${objectiveContent}"\nTarget IDs: ${intent.targetIds.join(", ") || "(None)"}`;
+
+    const userContext = `${worldStateSection}\n\n${proposedActionSection}\n\nDecide if the proposed action is logically valid and physically possible.`;
+
+    const components: PromptComponent[] = [
+      { label: "System Prompt", type: "system", content: systemPrompt },
+      {
+        label: "Current World State",
+        type: "world",
+        content: worldStateSection,
+      },
+      {
+        label: "Proposed Action",
+        type: "input",
+        content: proposedActionSection,
+      },
+    ];
+
+    return {
+      systemPrompt,
+      userContext,
+      components,
+    };
+  }
+}

packages/architect/src/llm-validator.ts

@@ -1,8 +1,8 @@
 import { z } from "zod";
-import { WorldState, serializeObjectiveWorldState } from "@omnia/core";
-import { ILLMProvider } from "@omnia/llm";
+import { WorldState } from "@omnia/core";
+import { ILLMProvider, PromptBreakdown } from "@omnia/llm";
 import { Intent } from "@omnia/intent";
-import { hydrateObjective } from "@omnia/voice";
+import { LLMValidatorPromptBuilder } from "./llm-validator-prompt-builder.js";
 
 export const ValidationResultSchema = z.object({
   isValid: z.boolean(),
@@ -12,7 +12,12 @@ export const ValidationResultSchema = z.object({
 export type ValidationResult = z.infer<typeof ValidationResultSchema>;
 
 export class LLMValidator {
-  constructor(private llmProvider: ILLMProvider) {}
+  public lastResult: PromptBreakdown | null = null;
+  private promptBuilder: LLMValidatorPromptBuilder;
+
+  constructor(private llmProvider: ILLMProvider) {
+    this.promptBuilder = new LLMValidatorPromptBuilder();
+  }
 
   /**
    * Validates an action intent against the objective world state.
@@ -25,6 +30,8 @@ export class LLMValidator {
     worldState: WorldState,
     intent: Intent,
   ): Promise<ValidationResult> {
+    this.lastResult = null;
+
     // Defensive guard: monologue and thought intents bypass validation.
     if (intent.type === "monologue" || intent.type === "thought") {
       return {
@@ -42,41 +49,16 @@ export class LLMValidator {
       };
     }
 
-    // 1. Serialize the objective world state for the LLM
-    const serializedWorld = serializeObjectiveWorldState(worldState);
+    const { systemPrompt, userContext, components } = this.promptBuilder.build(
+      worldState,
+      intent,
+    );
 
-    // 2. Build the prompts
-    const systemPrompt = `
-You are the World Architect, a deterministic and objective judge of reality, physics, and narration for a simulation game.
-Your task is to judge whether a proposed action (Intent) by an actor is physically and logically possible given the current objective state of the world.
-Exempt dialogue or speech actions from validation (consider them always valid).
-Enforce logical boundaries such as:
-- Spatial boundaries (an actor cannot grab an object in another location unless they are there).
-- Physical boundaries (an actor cannot open a locked drawer without a key or breaking it).
-- State Boundaries (an actor cannot perform a task if their state doesn't allow them to do so).
-- State/Attribute constraints.
-
-You must respond with a JSON object containing:
-- "isValid": boolean indicating if the action is possible/allowed.
-- "reason": a concise explanation of why the action is allowed or denied.
-`.trim();
-
-    const objectiveContent = hydrateObjective(intent.content, worldState);
-
-    const userContext = `
-=== CURRENT WORLD STATE ===
-Current Time: ${worldState.clock.get().toISOString()}
-Entities & Attributes:
-${serializedWorld}
-
-=== PROPOSED ACTION ===
-Actor ID: ${intent.actorId}
-Type: ${intent.type}
-Content: "${objectiveContent}"
-Target IDs: ${intent.targetIds.join(", ") || "(None)"}
-
-Decide if the proposed action is logically valid and physically possible.
-`.trim();
+    this.lastResult = {
+      systemPrompt,
+      userContext,
+      components,
+    };
 
     // structured call via the LLM provider
     const response = await this.llmProvider.generateStructuredResponse({