Fix dependency injection error when starting AgentAlpha

[Copilot]

Fixes a dependency injection error that prevented AgentAlpha from starting. The error occurred when trying to resolve IOpenAIResponsesService for the ToolSelector service:

❌ Agent failed with error: Unable to resolve service for type 'OpenAIIntegration.IOpenAIResponsesService' while attempting to activate 'AgentAlpha.Services.ToolSelector'.

Root Cause

The ToolSelector service requires IOpenAIResponsesService in its constructor, but the DI container only had OpenAIResponsesService registered as a concrete type, not as the interface.

Solution

Changed the service registration in ServiceCollectionExtensions.cs from:

services.AddSingleton(provider => new OpenAIResponsesService(configuration.OpenAiApiKey));

to:

services.AddSingleton<IOpenAIResponsesService>(provider => new OpenAIResponsesService(configuration.OpenAiApiKey));

This registers the service as the interface type, allowing the DI container to resolve it properly for dependent services.

Verification

• ✅ AgentAlpha now starts successfully without dependency injection errors
• ✅ All existing tests continue to pass (141 passed, 2 skipped)
• ✅ The fix is minimal and surgical - only one line changed

Fixes #75.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.openai.com
  • Triggering command: /home/REDACTED/work/agents/agents/src/Agent/AgentAlpha/bin/Debug/net8.0/AgentAlpha test task (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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