anomalyco / anomalyco/opencode

Legacy agent Markdown loses a separate model variant

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Dominant language
TypeScript
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Description

Description

A legacy agent Markdown definition with separate model and variant fields loses the requested variant. Adding another legacy field, such as temperature, makes the variant survive.

Plugins

Built-in agent configuration; no external plugins or model calls.

OpenCode version

V2 source checkout at 541937d12449e64d078c67e9013f1c288004b83f.

Steps to reproduce

Load this temporary agent file through the real config plugin and read its registered metadata with Agent.Service.get:

---
model: example/chat
variant: high
---
Review carefully.

example/chat is a fictional fixture reference; no model request is needed. Expected: the registered model retains variant: "high". Actual: only the provider and model ID remain. The native reference example/chat#high, or the legacy definition with temperature: 0.5 added, preserves the variant.

Operating System

macOS arm64, Bun 1.4.1.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the issue with the temporary legacy agent definition through the real config plugin, then inspect the metadata returned by Agent.Service.get. Trace how separate model and variant fields are registered, using the working native reference and the temperature variant as comparisons. Done means the registered metadata retains variant: "high" without requiring another legacy field or a model request.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
ai-infra-agents
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
68/100

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