Fun with Large Models

Oct 30, 2026 · Backend Development

DeepSeek Harness Plugin Architecture: Services for Shared Logic & Event Listeners for Flow Hooks

This article explains DeepSeek Harness's two core extension mechanisms: services for reusable logic shared across plugins, and event listeners (ctx.on) for observing, intercepting, and rewriting execution flows, with complete code examples for a summarization service and a guardrail plugin.