Bug: Kanban "Delegate to Agent" Dialog Does Not Populate Model and Effort for Non-Claude Providers (ex:codex)

[malys]

Summary

In the Kanban Delegate to Agent dialog, the Model and Effort dropdowns remain empty for all providers except Claude.

As a result, delegation to providers such as Codex cannot be configured properly.

Current Behavior

1. Open a Kanban task.
2. Click Delegate to Agent.
3. Select a non-Claude provider/agent.
4. Observe that:

Model:  Empty
Effort: Empty

while Claude-related agents populate correctly.

Expected Behavior

When selecting a provider or agent, the dialog should dynamically load:

Provider
    ↓
Available Models
    ↓
Available Effort Levels

Example:

Codex
 ├─ Sol
 ├─ Terra
 └─ ...

Effort
 ├─ Low
 ├─ Medium
 ├─ High
 └─ ...

Impact

• Delegation to non-Claude providers is difficult or impossible.
• Users cannot choose the execution model.
• Users cannot configure reasoning effort.
• Multi-provider workflows are effectively blocked.

Possible Cause

The model/effort list may only be populated for Claude providers while other providers are not exposing or loading their capabilities correctly.

Potential issues:

• Provider discovery failure
• Missing API call
• UI binding problem
• Incorrect capability mapping

Suggested Improvement

Instead of hardcoding values:

Provider → Models → Effort Levels

should be loaded dynamically from each configured provider.

If a provider does not support effort levels, display:

Effort: Not Supported

instead of an empty dropdown.

Additional UX Improvement

Display an informative message when no values are available:

No models available for this provider.
Check provider configuration.

rather than showing empty fields.

Priority

High

Expected Result

All supported providers should expose their available:

• Models
• Effort levels (when supported)

in the Kanban delegation dialog, just as Claude providers currently do.