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https://github.com/deepseek-ai/deepseek-harness
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A composition is a file, but "edit it on the filesystem" is not a browser affordance. The roster gains `read`/`write`/`remove` beside `select`, and the browser gains a settings section over them: the presets as rows, one composition open in a YAML editor at a time, and per-row default, duplicate, and delete. All four authoring methods are loopback-pinned. A composition names the plugins a session runs, so reading one is reconnaissance, writing one is arbitrary capability, and selecting one can move a session onto a preset that edits the live runtime. `agentPreset.list` deliberately stays ordinary and now reports `authorable`, so a surface knows whether creating is possible at all rather than offering a button whose save always fails. Authoring starts by duplicating: a shipped preset opens read-only because the deployment's copy is what a broken local one is compared against. Ids are contained before they become directory names, and the text is parsed with the loader's own schema, so a save cannot leave a file no session could load. Fixes a defect the real-composition test found: a preset written under the user's home could never mount, because the loader resolves a row against the composition's own directory and Node's `node_modules` walk from there never reaches the installed harness. The mount now records the host base and sends bare specifiers there, leaving relative paths resolving from the preset. Also closes the coverage the earlier surfaces in this stack shipped without — the General row, the composer seat, and the plugin halves now have tests.
client/ — web-GUI browser half
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The browser side of the dsh web GUI: shell boot, browser-host communication, shared UI services, and feature plugins. Authoring rules live in AGENTS.md; the host half is host/. All except test-runtime are product packages named @deepseek-ai/dsh-client-<name>.
| Package | Purpose |
|---|---|
web/ |
Boots the browser shell from the client entry graph. |
modules/ |
Loads browser-side client modules. |
web-react/ |
Connects the shell runtime to React rendering. |
connection/ |
Maintains browser-host RPC communication and event delivery. |
runtime/ |
Provides shared client services for sessions, workspaces, and UI composition. |
hmr/ |
Refreshes client plugins during development. |
locale/ |
Provides localization preferences and message dictionaries. |
schema-form/ |
Provides schema-backed draft handling for settings editors. |
test-runtime/ |
Provides shared repository test support for client feature packages. |
ui-slots/ |
Defines how UI features register and compose extension slots. |
ui-theme/ |
Applies the selected color theme. |
ui-primitives/ |
Provides shared React controls, icons, and content renderers. |
ui-layout/ |
Arranges the main application regions. |
ui-sidebar/ |
Presents workspace and session navigation. |
ui-workspace/ |
Provides workspace selection and creation surfaces. |
ui-conversation/ |
Presents the active conversation and its input surface. |
ui-goal/ |
Presents and manages the current goal. |
ui-trajectory/ |
Presents alternate views of agent activity. |
ui-command/ |
Provides session-aware command discovery and dispatch. |
ui-slash/ |
Coordinates inline command and reference suggestions. |
ui-skill/ |
Adds skill references to inline suggestions. |
ui-subagent/ |
Provides subagent navigation, child transcript states, and inline references. |
ui-model/ |
Provides model selection in conversation surfaces. |
ui-permission/ |
Configures default permissions and switches the current session's access. |
ui-plan/ |
Presents active plan-mode status and its exit control. |
ui-question/ |
Presents interactive questions requested by the agent. |
ui-settings/ |
Hosts the settings interface and its extension areas. |
ui-settings-general/ |
Provides the general settings section. |
ui-models/ |
Provides model-provider configuration and DeepSeek onboarding. |
Each child reference owns its contract and detailed behavior. The slot system standard and web client architecture note own the cross-package composition and loading decisions.