DeepSeek Harness Builds Entire Agent Framework as Cordis Plugins, Guide Explains

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DeepSeek Harness, currently in Developer Preview, treats every core component — including the model adapter, tool registry, session log, and agent loop — as a Cordis plugin rather than privileged core code. A technical guide published on DEV Community, pinned to commit 141eb6f on the master branch, explains how developers should choose between services, events, effects, profiles, and bundles when extending the framework. Services are recommended for callable capabilities with replaceable providers, while events handle passive observation and effects manage resources that must be cleaned up on unload. GitHub released the dsh-v0.1.0-rc.8 pre-release on August 19, though npm still showed version rc.7 as of August 20, meaning package availability may lag behind source releases. The guide is intended for agent-framework developers and emphasizes that plugin readiness is governed by dependency declarations, not YAML list order, with Cordis managing the full lifecycle from PENDING through ACTIVE to DISPOSED.

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