Introduction to the Official DeepSeek Harness Companion Plugin dsh-companion-dev

dsh-companion-dev is the developer version of the official DeepSeek Harness companion plugin, built on the Cordis framework. It aims to address engineering challenges in agent development through the "everything is a plugin" philosophy. It integrates nine independent modules: intelligent dialogue export, context handoff summaries, API cost optimization, global dialogue retrieval, execution trace analysis, Prompt engineering workbench, multi-model arena, task orchestration, and security auditing. The plugin supports exporting conversations in multiple formats, generating handoff summaries to continue long-running tasks, providing encrypted API key hosting, cost monitoring, and model routing, and features trace Diff, Prompt A/B testing, and multi-model comparison capabilities. It is developed in TypeScript and requires Node.js 22.19+ or 24+.