[Feature] Optimize DSPy Agent Prompts via AgentGateway Proxy

[christso]

Problem

DSPy-based agents (e.g., ReAct for code gen) need prompt optimization while routing through AgentGateway for secure A2A/MCP comms, but current opt lacks protocol-aware tuning.

Proposed Solution

Add --mode dspy-agent to bbeval opt:

• Setup: Wrap DSPy module (e.g., ReAct) with Agenspy for MCP output; proxy via AgentGateway endpoint (--gateway-url http://localhost:8080).
• Optimization: Tune agent instructions/tools using bbeval metric; enforce guidelines (e.g., "use MCP for tool calls").
• Output: JSON config with optimized signatures + gateway routes.
• Example: Optimize coding agent on 10 tasks, evaluating end-to-end latency/accuracy.

Benefits: Production-ready tuning for scaled, observable agents; supports <10 LLM calls.

Resources

AgentGateway