What Are Core Dependencies?

Pieces products, including the Pieces Desktop Application, are built on PiecesOS, which provides a local, secure, and efficient experience with built-in AI capabilities.

What Is PiecesOS?

To run any Pieces software, you will need PiecesOS, the backbone of the Pieces Suite. This lightweight application runs in the background of your device.

It powers the Long-Term Memory (LTM-2.7) Engine, Pieces Drive, and the Pieces Copilot.

PiecesOS: The backbone of the Pieces suite, managing local memory, AI-driven workflow enhancements, Pieces MCP, and other integrations within your development environment.

Local Models

Pieces includes built-in local models that run directly through PiecesOS—no external dependencies required.

These models power:

• Long-Term Memory (LTM-2.7) workflow processing
• Code enrichment and analysis
• Pieces Copilot with on-device LLMs
• Secret detection and security scanning

All local processing happens entirely on your device through PiecesOS, ensuring privacy and offline functionality.

What Does PiecesOS Do?

PiecesOS is a lightweight service that handles everything from local model management and context storage to advanced local inference for AI-assisted workflows.

PiecesOS is required for all Pieces products, including:

• Pieces Desktop App

• Plugins & Extensions for JetBrains, VS Code, Sublime Text, JupyterLab, Neovim, Raycast, Obsidian, the Pieces CLI, and more.

Why Do We Need PiecesOS?

Pieces is designed with speed and efficiency in mind, so PiecesOS acts as the central hub between different Pieces products to minimize client-side overhead and additional code while also being secure and highly configurable.

Our focus on security and flexibility is why we've built local models directly into PiecesOS—users can work entirely with on-device generative AI, and by offloading most operations locally, the user experience benefits from:

• Instant AI-powered assistance without cloud latency.

• 100% local memory storage with full control over data.

• Offline functionality, ensuring a seamless experience even when disconnected from the internet.

• Lightweight, background operation, consuming minimal system resources.

Local models are built into PiecesOS automatically, providing on-device AI capabilities without any additional setup or installation.

This is especially useful in enterprise settings where strong device security is important.