dsh-plugin-omoslim

DeepSeek Harness (dsh) bundle that installs an Orchestrator agent preset in the style of oh-my-opencode-slim: the main agent plans and dispatches, and model-pinned specialist subagents do the work.

What you get

One agent preset, orchestrator:

• Main agent = Orchestrator — a workflow manager persona (plan → dispatch → reconcile → verify), delegating instead of implementing.
• 11 subagent tools, each with its own persona and a model slot in a named model profile under models.d/ (provider defaults to null, i.e. inherit the main agent's provider):

Tool	Role	Model
subagent	generic worker (background, continuable)	inherit
subagent_fork	forks parent context	inherit
subagent_explorer	fast codebase navigation (read-only)	deepseek-v4-flash
subagent_oracle	architecture / review advisor (read-only)	glm-5.2
subagent_librarian	docs / external research	minimax-m2.7
subagent_designer	frontend UI/UX	kimi-k2.6
subagent_fixer	bounded implementation	deepseek-v4-flash
subagent_councillor_alpha/beta/gamma	independent multi-model reviews	glm-5.2 / kimi-k2.7-code / qwen3.7-max
subagent_council	multi-model consensus synthesis	kimi-k3

The models above mirror the OMO opencode preset found in ~/.config/opencode/oh-my-opencode-slim.json. The OMO council model gpt-5.6-luna is not in the opencode-go catalog, so kimi-k3 is used.

All model and provider names are examples from the OMO author's environment. The factory profiles seed provider: null (the subagent inherits the main agent's provider); set provider in models.d/<name>.json to pin one (e.g. "opencode-go"), and make sure each model name exists in that provider's catalog.

How it works

A dsh bundle is an npm package declaring "dsh": { "bundle": { "patch": "./cordis.patch.yml" } }. This bundle's patch layer inserts one row: the preset-installer plugin. On boot the plugin installs/updates config/presets/* in the harness-home user preset root (~/.dsh/.agent-presets), which the agent-presets roster always scans.

Why install into the user root instead of registering a new root? The dsh launcher's composeProfile forcibly overwrites agent-presets.config.roots with the shipped root, so a bundle cannot contribute its own root. The user root is the supported extension path.

Model definitions are separated from the composition

Each subagent's model and persona live in different files on purpose — you are far more likely to tweak a model than a persona, and plugin updates should not clobber your model choices. On top of that, you can keep many named model profiles and switch the active one at any time:

File (in the bundle)	File (in ~/.dsh/.agent-presets/orchestrator/)	What you edit
config/models.d/*.json	models.d/*.json	factory profiles (seeded on install; user-editable afterwards)
—	models.d/default.json	the default profile (user-owned)
config/presets/orchestrator/agent.cordis.yml.tmpl	agent.cordis.yml (rendered)	personas / tool wiring (generated from template)
—	.generated	render stamp { active, sourceHash, renderedHash } (managed)

The active profile is stored in ~/.dsh/settings.yaml under omoslim.active (defaults to default). Every boot the plugin re-renders agent.cordis.yml from the current template + the active profile. Rules:

• Switch the active profile → omoslim switch <name> re-renders in place; the next session created picks up the new models (no process restart needed).
• Model / provider change → edit models.d/<name>.json (provider: null = inherit the main agent's provider), then switch to it.
• Plugin update (new personas/wiring) → re-render happens on next boot; your models.d/*.json profiles are never overwritten.
• Hand-editing the composition → if you edit agent.cordis.yml directly, the plugin detects it (hash differs from the stamp) and leaves your file alone. You own it then; delete the preset directory to take plugin updates.

A profile must name every slot the template references (explorer, oracle, librarian, designer, fixer, councillor_alpha, councillor_beta, councillor_gamma, council). A missing slot fails closed rather than rendering a half-populated composition.

Install

# from the profile directory (web is the default profile)
dsh plugin --profile web add dsh-plugin-omoslim

dsh plugin forwards to pnpm and reconciles dsh.profile.bundles, so the package is both installed and activated as a bundle layer. Then restart the web app:

systemctl --user restart dsh-web
# or: restart your `dsh web` process

For local development instead of a published package:

# in ~/.dsh/profiles/web/
pnpm add file:/home/<you>/Coding/dsh-plugin-omoslim
# then add the package name to the "dsh.profile.bundles" array in package.json

Use

Open the web UI, start a new session and pick the orchestrator preset in Settings → General (it becomes the default only if you set it, or if ~/.dsh/settings.yaml has agent-presets.default: orchestrator). The main agent will plan and dispatch; the subagent tools appear in its tool catalog.

Uninstall / rollback

1. Remove the bundle: dsh plugin --profile web remove dsh-plugin-omoslim (or drop the dependency + dsh.profile.bundles entry manually), restart.
2. The preset files stay in ~/.dsh/.agent-presets/orchestrator/ — delete that directory to remove them, or keep it to keep using the preset without the plugin.

Multiple model profiles

Each profile is one JSON file under ~/.dsh/.agent-presets/orchestrator/models.d/, holding a slot → mapping table:

{
  "oracle": { "provider": null, "model": "glm-5.2" },
  "explorer": { "provider": "opencode-go", "model": "deepseek-v4-flash" }
}

• provider: null (or omitted) = inherit the main agent's provider.
• The legacy flat format "oracle": "glm-5.2" still works.
• Create a new profile by copying an existing file: cp models.d/default.json models.d/economy.json, then edit it.

Manage profiles with the CLI:

omoslim list                  # list profiles; the active one is marked *
omoslim current               # print the active profile name
omoslim switch economy        # switch + re-render now

omoslim ships as an npm bin (declared in package.json). Installing the plugin also links it into the profile's node_modules/.bin/, but that directory is not added to your shell $PATH automatically — npm/pnpm bins never modify your shell config. Make omoslim callable from anywhere with one of these:

Option A — add the profile's bin dir to your PATH (one line, persistent):

# zsh (default on macOS):
echo 'export PATH="$HOME/.dsh/profiles/web/node_modules/.bin:$PATH"' >> ~/.zshrc
source ~/.zshrc
# bash:
# echo 'export PATH="$HOME/.dsh/profiles/web/node_modules/.bin:$PATH"' >> ~/.bashrc
# source ~/.bashrc

Option B — install the package globally (bin lands on your global PATH):

npm install -g dsh-plugin-omoslim
# then `omoslim` works everywhere; note the global copy is separate from the
# profile's copy, so re-run this after upgrading the plugin.

Option C — one-off, no PATH changes:

~/.dsh/profiles/web/node_modules/.bin/omoslim list   # full path
# or, from inside the profile directory:
#   npx --no-install omoslim switch economy

omoslim switch <name> writes omoslim.active to ~/.dsh/settings.yaml and re-renders agent.cordis.yml in place — create a new session to use the new models; a running session keeps the models it was composed with, and the dsh process does not need to restart.

Customizing

• Change a subagent's model / provider → edit ~/.dsh/.agent-presets/orchestrator/models.d/<name>.json, then omoslim switch <name> (or let the next boot re-render it). Your profiles are never overwritten by plugin updates.

  {
    "oracle": { "provider": null, "model": "glm-5.2" },
    "explorer": { "provider": "opencode-go", "model": "deepseek-v4-flash" }
  }
  

  provider: null (or omitted) = the subagent inherits the main agent's provider. The legacy flat format "oracle": "glm-5.2" still works (provider is treated as inherited). Model names must exist in the chosen provider's catalog.

• Change personas / tool wiring → edit the template in the bundle (config/presets/orchestrator/agent.cordis.yml.tmpl) and bump the plugin, or hand-edit the rendered ~/.dsh/.agent-presets/orchestrator/agent.cordis.yml — hand edits are detected (stamp mismatch) and left alone. To take plugin updates again, delete the preset directory first.

• Reinstall the pristine preset → rm -rf ~/.dsh/.agent-presets/orchestrator and restart dsh.

Layout

dsh-plugin-omoslim/
├── package.json            # dsh.bundle.patch declaration + "omoslim" bin
├── cordis.patch.yml        # bundle patch layer (inserts the installer row)
├── config/
│   ├── models.d/            # factory model profiles (default.json, cheap.json, …)
│   └── presets/orchestrator/
│       ├── preset.yml
│       └── agent.cordis.yml.tmpl   # composition template (@@models.<key>@@ slots)
└── lib/
    ├── index.js            # Cordis plugin: installer + template renderer + profile helpers
    └── cli.js              # omoslim CLI: list / switch / current