Show the agent type on subagent rows

[crisperity]

Before submitting

• I searched existing issues and did not find a duplicate.
• I am describing a concrete problem or use case, not just a vague idea.

Area

apps/web, apps/mobile

Problem or use case

Subagent rows show the title, status and model, but not which agent type is running (for example Explore or general-purpose). Claude Code, Codex and OpenCode all have named agent types. T3 Code does not show the type anywhere in the UI, including the child thread. The only way to find it is to ask the parent agent.

Model and effort were covered by #6938, closed as delivered in V2. The agent type is not shown.

Proposed solution

Displaying the agent type as a subtle badge and preserving it in the execution trace. ~ @emrehangorgec

Why this matters

• Shows what kind of agent the parent chose to delegate to
• Helps explain why a subagent is slow or shallow
• Helps spot a heavy agent running a trivial task

Smallest useful scope

The agent type is visible on a subagent row when the provider reports it, and absent when it doesn't.

Alternatives considered

Asking the parent agent. It costs tokens and may be wrong.

Risks or tradeoffs

Providers name agent types differently, and some don't report one.

Examples or references

• Show agent type and effort level when subagents are spawned #16174
• [Feature]: Always show each subagent's model in the Agents panel #6938
• Prototype PR (closed pending approval): feat(web): show the agent type on subagent rows #18697

Contribution

• I would be open to helping implement this.

[emrehangorgec]

I'd suggest displaying the agent type as a subtle badge and preserving it in the execution trace. That would make debugging agent delegation much easier without adding UI clutter.