deepseek-harness/packages/extensions

extensions/ — the agent modifies its own runtime

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Model-facing tools over the live cordis runtime the agent itself runs inside: inspect the loaded plugins and service API, define and run model-written dynamic packages, and retract them again — plus the restricted repository Plugin runtime. Both browser-half packages live here rather than under packages/client/ because they are halves of this subsystem's dual-half packages; the host aggregate excludes them so each face keeps its own compiler program. Design home: the toolset Agent Note.

Package	Role	ctx key
tool-cordis/	Model-facing runtime inspection and dynamic-package tools	registers on ctx.tools
cordis-host-runner/	Definition registry, the node:vm sandbox for host halves, and the request-run round trip	provides ctx.dynamicCordisRunner
cordis-client-runner/	Browser half of a dual-half package: evaluates the definition into a live browser plugin and answers the run request	client face; provides the browser ctx.dynamicCordisRunner
ui-cordis/	Browser surfaces: the frame-wide panel that operates every definition, and the read-only define card	client face; registers slots

See Extensions for package lifecycle, sandbox behavior, and the generated Cordis API.