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SystematicStructured Engineering Workflows for OpenCode

Migrating from source-owned model defaults

The plain npm plugin no longer chooses a provider/model pair for a bundled agent category. Bundled agents inherit the invoking model unless user-owned configuration supplies an explicit model overlay.

This is a removal for plain npm consumers, not a pure relocation. OCX/OMO installers may still provide curated category routing through their registry profile. Users of the plain npm package must opt in explicitly if they want category-aware routing.

Reconstructing the former mapping

Section titled “Reconstructing the former mapping”

The following table records the complete provider chain that the deleted runtime defaults used. Entries are listed in resolution order. A +variant suffix records the variant that was emitted with that model.

CategoryFormer provider chain
designgithub-copilot/gemini-3.1-pro-preview, openai/gpt-5.5+high, anthropic/claude-opus-4-7+max, vercel/v0-1.5-md
document-reviewanthropic/claude-opus-4-7+max, openai/gpt-5.5+high, github-copilot/gemini-3.1-pro-preview, opencode/claude-sonnet-4-6
researchopenai/gpt-5.4-mini, anthropic/claude-sonnet-4-6, github-copilot/gemini-3.1-pro-preview, opencode/claude-sonnet-4-6
reviewanthropic/claude-sonnet-4-6, openai/gpt-5.3-codex, github-copilot/gemini-3.1-pro-preview, opencode/claude-sonnet-4-6
workflowopenai/gpt-5.4-mini, anthropic/claude-sonnet-4-6, opencode/claude-haiku-4-5, opencode-go/claude-haiku-4-5

To reproduce a prior pin, copy the desired provider/model pair into the category’s model field. If the table includes +high or +max, set the matching variant field as well. The chain is historical guidance; explicit config should reflect the model you actually want to use.

For example:

{
  "categories": {
    "design": {
      "model": "openai/gpt-5.5",
      "variant": "high"
    },
    "document-review": {
      "model": "anthropic/claude-opus-4-7",
      "variant": "max"
    },
    "research": {
      "model": "openai/gpt-5.4-mini"
    },
    "review": {
      "model": "anthropic/claude-sonnet-4-6"
    },
    "workflow": {
      "model": "openai/gpt-5.4-mini"
    }
  }
}

Set an exact agents.<key> overlay when one agent needs a different choice from the rest of its category. Set model: null to clear an explicit model and restore inheritance.

What changes by installation type

Section titled “What changes by installation type”
  • Plain npm plugin: bundled agents inherit the invoking model. Category-aware routing is absent unless you add categories or agents overlays in user-owned config.
  • OCX/OMO installer: the installer may apply a curated registry profile with explicit category model policy. That policy is separate from the plain npm plugin and is not reconstructed automatically by this migration.

Bundled agent markdown remains model-free in both cases. The portable markdown contract did not change.

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