Custom agent with model: haiku fails with thinking error

Bug Description

A custom agent configured with model: haiku failed with an API error related to thinking.

Error Message

API Error: 400 'claude-3-5-haiku-20241022' does not support thinking.

Agent Configuration

---
name: memory-updater
model: haiku
permissionMode: bypassPermissions
tools: Read, Write, Edit, Bash, Glob, Skill
---

Context

• Agent was spawned via Task tool
• User reported having extended thinking enabled
• Error occurred when the agent attempted to run

Expected Behavior

Agent should run without error when configured with model: haiku.

Workaround

Changing model: haiku to model: sonnet resolves the issue (but increases cost).