packages/extensions
September 6, 2026 · View on GitHub
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Summary
The extensions group lets a running agent modify the runtime it runs inside: the model can inspect the plugins and services loaded in the current DSH process, define a dynamic Cordis package (with a host half, a browser half, or both), run it, stop it, and remove it, and a browser panel operates every definition. Packages evolve by plugin: a plugin holds immutable package versions and can run or update between them. Definitions live only in process memory, so a DSH restart clears them and nothing here writes repository files or configuration. Four packages form the subsystem: the model-facing tools plus the host runner, and the browser runner plus the browser UI.
Table of Contents
Packages
| Package | Role | ctx key |
|---|---|---|
tool-cordis | Seven model-facing tools: inspect the live runtime, define, run, stop, and remove dynamic packages | registers on ctx.tools |
cordis-host-runner | Host half: definition registry, sandboxed host-half lifecycle, and the inspect registry browser queries answer | provides ctx.dynamicCordisRunner and ctx.cordisInspect |
cordis-client-runner | Browser half: evaluates a browser-half source into a live plugin and answers run requests | client face; provides browser ctx.dynamicCordisRunner |
ui-cordis | Browser surfaces: the frame-wide panel, lifecycle tool cards, and the @pluginId input source | client face; registers slots |
Related documentation
- Extensions subsystem — the generated
ctx.cordisInspectandctx.dynamicCordisRunnerservice API. - Generated tool catalog — the seven model-facing tool schemas.
- Generated configuration catalog — the runner's accepted config fields.
- Self-referential Cordis toolset Agent Note — design home for sandbox semantics, lifecycle, and composition.
- Client shells and dynamic packages Agent Note — package placement and build faces for the client halves.
Dev Note
Working context for maintainers — click to expand
The two browser-half packages live in this group rather than under packages/client/ because they are halves of this subsystem's dual-half packages; the client face compiles them through the client program, while the host program references only the host runner.