Cordis Powers DeepSeek’s Modular Agent Harness

Cordis looks less like another app framework and more like infrastructure for making agent runtimes replaceable, recoverable, and inspectable.

• –DeepSeek Harness demonstrates the architecture in practice: models, tools, sessions, orchestration, and interfaces can all be plugins.
• –Revertible effects could let systems remove failed components without discarding unrelated runtime state.
• –Reactive coeffects provide a principled way to propagate dependency changes through dynamic agent environments.
• –Hot module replacement and configuration reconciliation make Cordis relevant to self-evolving harnesses and MCP-heavy workflows.
• –The API remains unstable, so developers should treat it as an experimental foundation rather than production-stable middleware.