Improvement: Goose provider/model hardcoded in recipe.yaml — should be parameterised

[Augustas11]

Problem

goose_provider and goose_model are hardcoded in recipe.yaml:

settings:
  goose_provider: "openrouter"
  goose_model: "minimax/minimax-m2.5"

Anyone wanting to swap to a different model (Claude, GPT-4o, Gemini) must edit the YAML directly. Environment variables set before running are silently overridden by recipe settings. This makes model comparison experiments unnecessarily manual.

Suggested Fix

Parameterise both values:

parameters:
  - key: model
    input_type: string
    requirement: optional
    default: "minimax/minimax-m2.5"
    description: "OpenRouter model ID to use"

Or at minimum document in the README that these values override env vars and must be edited directly for model swaps.

Impact

Low — usability issue, not a correctness bug. But blocks easy reproduction with other models.