Overview

Cloudflare Computer provides a revolutionary virtual filesystem that lives inside a Durable Object. This system leverages SQLite for authoritative state management and offers a pluggable execution surface (workspace.runtime) for running code in various sandboxed environments. It's designed to bring a "computer" experience to the Cloudflare Workers platform, enabling sophisticated agent-like capabilities and flexible execution models.

Key Features

• Durable Object-backed Filesystem: A robust virtual filesystem hosted within a Durable Object, ensuring data persistence and state management with SQLite.
• Pluggable Runtimes: Supports multiple execution backends:
  • Container: Projects the SQLite state into a Linux sandbox as a FUSE mount, offering a full userland, real binaries, and network access.
  • Isolate Shell: Runs just-bash within a Dynamic Worker, directly interacting with the Workspace via Workers RPC for seamless execution.
  • Isolate JavaScript: Executes ECMAScript modules in a fresh Dynamic Worker, providing structured input/results, durable imports, configured libraries, and trusted node:fs/promises, ws:git, and ws:artifacts modules.
• Unified Execution Entrypoint: A single workspace.runtime.exec(source, { backend }) function to execute code, abstracting away the complexities of the chosen backend.
• Flexible Workspace Construction: Workspaces can be initialized with or without a backend, allowing for filesystem-only access when needed.
• Performance Optimized: Benchmarks indicate that the computerd FUSE mount excels in metadata-heavy operations and offers competitive performance for large I/O tasks.

Typical Use Cases

• Building Sophisticated Agents: Develop AI agents that can read, write, and execute code within a persistent, sandboxed environment.
• Code Execution and Sandboxing: Safely run untrusted or complex code snippets in isolated environments, from shell commands to JavaScript modules.
• CI/CD and Build Pipelines: Automate build processes, code artifact generation, and deployments directly on the edge.
• Data Processing and Transformation: Process large datasets or perform complex data transformations using the virtual filesystem and its execution capabilities.
• Prototyping and Experimentation: Quickly spin up and test new application ideas and backend services in a realistic computing environment.
• Edge-Native Applications: Develop applications that require local file system access and execution capabilities directly within the Cloudflare Workers ecosystem.