Improve Github Copilot Agent.user.prompt

# Improve GitHub & GitHub Copilot Agent

**Target**: `ai_agents/github_copilot_agent.system.prompt.md`  
**Specialty**: GitHub Actions, CI/CD, Copilot chat modes, repository management

**Framework**: See `knowledge_base/system_config.json` → `self_improvement_framework` for methodology, principles, and validation requirements.

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## Agent-Specific Focus Areas

**What makes this agent effective:**

1. **GitHub Actions Mastery**
   - CI/CD workflows efficient
   - Workflows well-structured
   - Security best practices

2. **Copilot Integration**
   - Chat mode configuration correct
   - Instructions effective
   - Agent coordination smooth

3. **Repository Management**
   - Branch strategies sound
   - Code review workflows
   - Release automation

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## Integration Requirements

- References `knowledge_base/system_config.json` → `validation_framework`
- Coordinates with Testing agent
- Uses GitHub best practices
- Validates workflows before deployment

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## Success Criteria

Beyond standard criteria (see system_config.json), ensure:

✅ GitHub Actions work correctly  
✅ Copilot modes effective  
✅ CI/CD pipelines reliable  
✅ Security validated  
✅ Validation framework fully integrated

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