@createsomething/pi-three-tier-framework

The Three-Tier Framework (Database, Automation, Judgment) for agent systems — delivered as a Pi coding agent package.

Install

pi install npm:@createsomething/pi-three-tier-framework

Source price: $0 under the MIT License. Managed CREATE SOMETHING Control is a separate service, available from $900/month.

What You Get

Skills

• /skill:three-tier-framework — Load the full framework reference, tier definitions, debugging heuristic, and MCP mapping
• /skill:deep-module-design — Design modules for leverage, locality, testability, and clear tier ownership

Prompt Templates

• /classify — Classify any system component into framework tiers
• /debug-tier — Apply the three-tier causality heuristic to debug a failure
• /mcp-design — Design an MCP server using the framework

The Framework

Every agent system has three tiers, mapped to MCP's three primitives:

Tier	What	MCP Primitive	Control Model
Database	What exists (state, records)	Resources	Application-controlled
Automation	What happens (tools, skills)	Tools	Model-controlled
Judgment	What should happen (policy)	Prompts	User-controlled

Debug order: Always check tiers in sequence — Database → Automation → Judgment. Lower-tier failures cascade upward.

The recursive property: MCP's sampling mechanism allows Automation to request Judgment, creating a feedback loop that mirrors embodied cognition.

Policy as artifact: Constraints flow through all tiers as data — stored in Database, transformed by Automation, evaluated by Judgment.

Learn More

• Three-Tier Framework paper
• CREATE SOMETHING — Custom MCP development and Policy OS delivery
• MCP server version — The framework as an MCP server