dsh-custom-mode

The settings-page half of dsh-custom-mode — a Web UI for DeepSeek Harness (dsh) agent modes: choose a mode's base composition, toggle the plugin rows it mounts, and edit its system prompt, which is a plain file the agent loop re-reads before every model step — a save applies on the next step, with no restart and no new session. Several modes ("assistants") live side by side, each with its own prompt.

Searched for as: custom mode · custom prompt · system-prompt editor · multi-mode / several assistants · 自定义模式 · 自定义提示词 · 多助手／多模式.

Install

dsh plugin --profile web add dsh-custom-mode

That one command is the whole install. The package carries the agent preset, and the host half writes it into $DSH_HOME/.agent-presets/ on first activation — filling in only what is missing, so a prompt.md you wrote yourself is never overwritten.

To keep the source around as well, clone the repository and run ./install.sh instead; it does the same two things explicitly, and ./uninstall.sh undoes them (keeping your prompt unless you pass --purge).

The mode is web-profile only: agent-presets, the service that mounts presets at all, ships with dsh's web profile. In tui / headless this package activates but registers nothing.

Requirements

• dsh >=0.1.5-rc.2 <0.2.0-0（latest stable 0.1.5-rc.2 and latest preview 0.1.6-alpha.2）** — declared in engines.dsh and as an optional peer range. This package never imports @deepseek-ai/dsh; it only reads the host services dsh injects.
• No build step, no dependencies: the source is published as-is and uses only Node's standard library.
• The package version is its own line (1.0.0, 1.0.1, …). Which dsh it supports is declared in engines.dsh; see the repository README's "Versioning" section.

Documentation

The full documentation is bilingual in the repository:

• README (English) · 中文说明
• Troubleshooting — every failure that was actually reproduced, with symptoms, cause and a way out
• Measurements — the commands and raw output behind every claim
• Architecture — why this had to be two artifacts, and which host APIs it depends on

Security note

The route this package serves runs the platform's own browser-trust check (ctx.connection.requestRejection) before anything else and fails closed when that service is unavailable. Before that check existed, the route could be read and written unauthenticated — see SECURITY.md for the affected range and the mitigation.

License

MIT