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Pi (harness)¶
Pi (pi.dev) is an agentic-loop harness — the middle layer of the three-layer agent platform stack. It manages the core agent loop: calling tools, reading results, managing context, and continuing until the task completes.
Role in the stack¶
| Layer | Example |
|---|---|
| Framework | Flue |
| Harness | Pi, Project Think |
| Runtime/Platform | Agents SDK |
Pi powers both Flue (1.0 Beta) and OpenClaw.
Seen in¶
- sources/2026-06-17-cloudflare-bringing-more-agent-harnesses-and-frameworks-to-cloudflare — identified as the harness layer underneath Flue and OpenClaw
Related¶
- systems/flue — framework built on Pi
- systems/project-think — Cloudflare's first-party harness (peer at the same layer)
- systems/cloudflare-agents-sdk — runtime layer Pi targets