Implement GPT-4 agent with multi-LLM fusion architecture

[Copilot]

Adds GPT-4 agent as the first component of a multi-LLM system that will orchestrate GPT-4, Claude, and Gemini in parallel, merging their outputs through a response fusion layer.

Architecture

Request → [GPT-4 | Claude | Gemini] → Fusion Layer → Response

Base Agent Framework (agents/base.py)

• BaseLLMAgent abstract class defining the interface for all LLM agents
• AgentRequest/AgentResponse data structures for standardized communication
• Future agents (Claude, Gemini) will extend this interface

GPT-4 Agent (agents/gpt4/agent.py)

• OpenAI API integration with async support
• Exponential backoff retry on rate limits and connection errors (max 3 attempts)
• Context and conversation history support
• Error isolation: failures return structured error responses

Response Fusion Layer (agents/fusion/layer.py)

• Four strategies: consensus (longest response), best (highest token count), weighted (configurable per-agent), concatenate (all responses)
• Filters failed responses automatically
• Returns confidence scores and metadata

Configuration (config.py)

• Environment-based (.env support)
• Per-agent settings: model, temperature, max_tokens

Usage

from agents.gpt4 import GPT4Agent
from agents.base import AgentRequest
from agents.fusion import ResponseFusionLayer

# Single agent
agent = GPT4Agent(name="gpt4")
request = AgentRequest(prompt="Explain quantum computing", temperature=0.7)
response = await agent.process_request(request)

# Multi-agent with fusion
fusion = ResponseFusionLayer(strategy="consensus")
responses = await asyncio.gather(
    gpt4_agent.process_request(request),
    claude_agent.process_request(request),  # To be implemented
    gemini_agent.process_request(request),  # To be implemented
)
fused = await fusion.fuse_responses(responses)

Test Coverage

• 32 tests covering initialization, request processing, error handling, retry logic, and all fusion strategies
• 95% code coverage
• 0 security alerts (CodeQL)

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

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

• api.openai.com
  • Triggering command: /usr/bin/python3 python3 examples.py (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
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Original prompt

---

This section details on the original issue you should resolve

<issue_title>Agent for GPT-4 Integration and Orchestration</issue_title>
<issue_description>Design and implement an AI agent that interfaces with OpenAI's GPT-4 API. The agent should:

• Accept prompts and data requests
• Forward them to GPT-4
• Return results to the fusion layer for response merging and validation
• Provide robust error handling and logging
• Be modular for easy upgrade/changes

This agent is a key component of a multi-LLM architecture that includes parallel agents for Claude and Gemini, all merging their outputs via a response fusion layer.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Agent for GPT-4 Integration and Orchestration #16

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