OpenCode v2 plugin — install and configure

@omniroute/opencode-plugin-v2 puts your whole OmniRoute catalog — models, combos and auto-combos — into OpenCode v2’s model picker, with display names, pricing and free-tier budgets.

It is a separate package from @omniroute/opencode-plugin because OpenCode v1 and v2 load plugins through different contracts. Pick the one matching your OpenCode major; nothing is shared between them, so upgrading one never forces the other.

Requirements

• OpenCode v2.
• A reachable OmniRoute gateway (http://localhost:20128 by default).
• Node.js 22 or 24.

Install

Add the plugin to opencode.json:

{
  "plugins": [
    {
      "package": "@omniroute/opencode-plugin-v2",
      "options": {
        "providerId": "omniroute",
        "baseURL": "http://localhost:20128"
      }
    }
  ]
}

Models then appear as omniroute/<provider>/<model>; providerId decides that prefix and the id of the integration OpenCode stores the credential under.

Credentials

The plugin looks for a gateway key in three places, in this order:

1. The credential you connected in OpenCode. The plugin registers an integration, so OpenCode’s own auth flow can store the key. Nothing lands in opencode.json — prefer this.
2. apiKey in the plugin options, for a per-project override. It puts the key in a file you may be committing.
3. OMNIROUTE_API_KEY in the environment.

With none of the three, the catalog is empty and the plugin says so once at startup instead of leaving you with a silent empty picker.

The management token is a different key

Combos, provider health and enrichment (display names, pricing, free-tier budgets) come from the gateway’s /api/* endpoints, which most deployments gate behind a management token rather than the inference key:

"options": {
  "baseURL": "http://localhost:20128",
  "managementReadToken": "<management read token>"
}

Left unset, managementReadToken falls back to apiKey. When a gateway rejects that fallback the catalog still publishes, but with raw model ids instead of display names, no canonical alias dedupe, no pricing and no combos. The plugin warns once per endpoint when that happens, naming the endpoint and what was lost — so a degraded picker is never a mystery.

Options

Key	Default	Notes
providerId	"omniroute"	Provider id, integration id, and the prefix models appear under
baseURL	required	Gateway root, http(s) only; the /v1 suffix is added where needed
apiKey	connected credential, then OMNIROUTE_API_KEY	Chat key for /v1/*
managementReadToken	falls back to apiKey	Key for /api/* — usually not the same one
displayName	"OmniRoute"	Provider name in the picker
timeoutMs	10000	Per-endpoint fetch timeout (auto-combos use 5s)
modelCacheTtlMs	300000	Catalog cache TTL; a disk snapshot warms cold starts
timeouts	falls back to timeoutMs	Per-endpoint budgets in ms: models, combos, autoCombos, enrichment
enrichment	true	Fetch names, pricing and free-tier budgets
providerTag	true	Prefix a display name with the upstream provider it routes to
usableOnly	false	Keep only providers the gateway reports as provisioned
visibleModels / hiddenModels	[]	Exact-or-suffix allowlists; deny wins
geminiSanitization	true	Strip the JSON-Schema keywords Gemini rejects from tool schemas ($ref tools are forwarded untouched)
apiFormat.allowAnthropic	false	Route allowlisted ids through the Anthropic API block
apiFormat.anthropicModels	[]	Full model ids routed to Anthropic
logLevel / startupDebug	warn / false	Logger verbosity

How the catalog stays fresh

The catalog is fetched lazily and cached for modelCacheTtlMs, and a disk snapshot keeps the last known catalog available when the gateway is unreachable — an outage costs you nothing but freshness. Models and combos are published as soon as they arrive; auto-combos, the provider list and the enrichment overlay fold in when they land, so one slow endpoint cannot hold the whole picker hostage.

Names carry what the gateway knows: the upstream provider a model routes to, a [Free] marker and the budget that comes with it — so two connections selling the same model stay distinguishable. Turn the prefix off with "providerTag": false.

There is no manual refresh command: OpenCode v2 commands are prompt templates, not callbacks, so a plugin cannot expose one. Refreshes follow the TTL; the host is asked to reload only when the catalog or the overlay actually changed, never once per refresh.

Tool calling on Gemini

Gemini rejects an entire request whose tool declarations carry $schema or additionalProperties, answering 400 INVALID_ARGUMENT. The plugin strips those keywords from tool schemas bound for a Gemini model of this provider and leaves every other request untouched. A tool carrying a $ref is forwarded untouched rather than stripped, since removing the reference would widen the schema to “accept anything”. Set "geminiSanitization": false to turn it off.

Troubleshooting

Symptom	Cause
Picker shows no OmniRoute model	No key resolved (check the startup warning), or the gateway is unreachable
Raw model ids, no combos, no pricing	The management endpoints refused the token — set managementReadToken
A session pinned to opencode-<id>/…	The v1 plugin published opencode-<id>; v2 publishes <id> bare, so re-select the model under <id>/…

See also

• CLI-INTEGRATIONS.md — every setup-* CLI integration, including the lightweight openai-compatible OpenCode setup.
• REMOTE-MODE.md — pointing a CLI at a remote gateway.

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OmniRoute source repository (a58000c7685f)