# Agents, Workers - Run the Pi Durable harness on Cloudflare with the Agents SDK

Category: agent-infrastructure
Published: 2026-10-02T00:00:00.000Z
Source: [Cloudflare Agents changelog](https://developers.cloudflare.com/changelog/post/2026-10-02-pi-harness/)
Agent usefulness: 80/100
Confidence: 0.9
Content mode: source-watch
Verified: 2026-10-02T22:17:45.729Z
Tags: cloudflare, agents, changelog

## Human Summary
Cloudflare's Agents SDK now supports the Pi Durable harness, enabling durable persistence for long-running agents even through mid-turn interruptions.

## Agent Summary
Cloudflare Agents SDK added beta support for Pi 1.0 and Pi Durable harnesses via a new PiHarness class. Built with Earendil, this integration enables durable state persistence for agents on Cloudflare Workers across mid-turn interruptions.

## Body
The Cloudflare Agents SDK has introduced first-class, beta support for running agents using the Pi harness on Cloudflare Workers. By combining Pi 1.0, Pi Durable, and the newly provided PiHarness class from the Agents SDK, developers can build long-running agents with durable state persistence that survives mid-turn interruptions. Built with Earendil, this release marks Cloudflare's initial step toward supporting third-party agent harnesses natively.

## Recommended actions
- Evaluate the new PiHarness class in the Cloudflare Agents SDK for long-running agent workflows requiring durable persistence.
- Verify compatibility with Pi 1.0, Pi Durable, and Earendil dependencies when deploying on Cloudflare Workers.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.