When overriding an agent's model to a different provider, the agent
now automatically gets provider-appropriate reasoning options:
- GPT models: `reasoningEffort`, `textVerbosity`
- Anthropic models: `thinking` with `budgetTokens`
## Why utils.ts changes are required
The original flow merges overrides onto pre-built agent configs:
mergeAgentConfig(sisyphusAgent, { model: "gpt-5.2" })
// Result: { model: "gpt-5.2", thinking: {...} }
The `thinking` config persists because it exists in the pre-built
`sisyphusAgent`. GPT models ignore `thinking` and need `reasoningEffort`.
The fix: call the agent factory with the resolved model, so the factory
can return the correct provider-specific config:
buildAgent(createSisyphusAgent, "gpt-5.2")
// Result: { model: "gpt-5.2", reasoningEffort: "medium" }
Closes#144🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
