Before opening, please confirm:

• I have searched for duplicate or closed issues

Operating System

macOS 26.2

Kiro Version

Kiro CLI 1.26.0

Bug Description

I have a custom agent called reviewer. In the previous stable version (Kiro CLI 1.25.1), I was able to ask my main agent to use the subagent tool to spawn reviewer to get feedback on changes. However, in the latest release I'm seeing this error:

unable to find agent with name: reviewer

That's quite strange because I'm able to spawn the agent directly:

kiro-cli chat --agent reviewer

Steps to Reproduce

1. Create a custom agent in e.g. ~/.kiro/agents/reviewer.json
2. Ask an agent to invoke that agent with the subagent tool

Expected Behavior

Custom subagents should work as documented.

Conversation ID

No response

Additional Context

No response