Summary

• Skip the global opencode.json model (uiSelectedModel) when the user explicitly configures a Prometheus-specific model override
• Separate category model into its correct pipeline slot (categoryDefaultModel) instead of folding into userModel

Problem

When opencode.json sets a global model to Gemini (e.g., "model": "google/gemini-3.1-pro-preview") and the user explicitly configures agents.prometheus.model to a Claude model in oh-my-opencode.json, Prometheus still uses the Gemini model and its Gemini-specific prompt.

Root cause: buildPrometheusAgentConfig() passes params.currentModel (the global model) as uiSelectedModel unconditionally. Since uiSelectedModel is Step 1 (highest priority) in resolveModelPipeline(), it short-circuits before ever reaching Step 2 where the user's Prometheus-specific model override lives.

All other agents guard against this:

• Sisyphus (sisyphus-agent.ts): uiSelectedModel: sisyphusOverride?.model ? undefined : uiSelectedModel
• Atlas (atlas-agent.ts): uiSelectedModel: orchestratorOverride?.model ? undefined : uiSelectedModel
• General agents (general-agents.ts): uiSelectedModel: (isPrimaryAgent && !override?.model) ? uiSelectedModel : undefined

Prometheus lacked this guard.

Fix

Applied the same guard pattern used by all other agents:

const configuredPrometheusModel =
  params.pluginPrometheusOverride?.model ?? categoryConfig?.model;

resolveModelPipeline({
  intent: {
    uiSelectedModel: configuredPrometheusModel ? undefined : params.currentModel,
    userModel: params.pluginPrometheusOverride?.model,
    categoryDefaultModel: categoryConfig?.model,
  },
  ...
});

When the user explicitly configures a Prometheus model (via agents.prometheus.model or category config), uiSelectedModel is set to undefined, allowing the user's override to take priority. Additionally, categoryConfig?.model is now correctly placed in categoryDefaultModel instead of being folded into userModel.

Changes

Fixes #2693

Summary by cubic

Fix Prometheus to honor its agent-specific model override instead of the global opencode.json model, and put the category model in the correct pipeline slot. Fixes #2693.

• Bug Fixes
  • Ignore uiSelectedModel when a Prometheus-specific or category model is set, so the override wins in resolveModelPipeline().
  • Use categoryDefaultModel for the category model instead of userModel.

^{Written for commit 11f1d71. Summary will update on new commits.}