comparing-database-schemas

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name: comparing-database-schemas description: | Use when you need to work with schema comparison. This skill provides database schema diff and sync with comprehensive guidance and automation. Trigger with phrases like "compare schemas", "diff databases", or "sync database schemas". allowed-tools:

• Read
• Write
• Edit
• Grep
• Glob
• Bash(psql:, mysql:, mongosh:*) version: 1.0.0 license: MIT

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Prerequisites

Before using this skill, ensure:

• Required credentials and permissions for the operations
• Understanding of the system architecture and dependencies
• Backup of critical data before making structural changes
• Access to relevant documentation and configuration files
• Monitoring tools configured for observability
• Development or staging environment available for testing

Instructions

Step 1: Assess Current State

1. Review current configuration, setup, and baseline metrics
2. Identify specific requirements, goals, and constraints
3. Document existing patterns, issues, and pain points
4. Analyze dependencies and integration points
5. Validate all prerequisites are met before proceeding

Step 2: Design Solution

1. Define optimal approach based on best practices
2. Create detailed implementation plan with clear steps
3. Identify potential risks and mitigation strategies
4. Document expected outcomes and success criteria
5. Review plan with team or stakeholders if needed

Step 3: Implement Changes

1. Execute implementation in non-production environment first
2. Verify changes work as expected with thorough testing
3. Monitor for any issues, errors, or performance impacts
4. Document all changes, decisions, and configurations
5. Prepare rollback plan and recovery procedures

Step 4: Validate Implementation

1. Run comprehensive tests to verify all functionality
2. Compare performance metrics against baseline
3. Confirm no unintended side effects or regressions
4. Update all relevant documentation
5. Obtain approval before production deployment

Step 5: Deploy to Production

1. Schedule deployment during appropriate maintenance window
2. Execute implementation with real-time monitoring
3. Watch closely for any issues or anomalies
4. Verify successful deployment and functionality
5. Document completion, metrics, and lessons learned

Output

This skill produces:

Implementation Artifacts: Scripts, configuration files, code, and automation tools

Documentation: Comprehensive documentation of changes, procedures, and architecture

Test Results: Validation reports, test coverage, and quality metrics

Monitoring Configuration: Dashboards, alerts, metrics, and observability setup

Runbooks: Operational procedures for maintenance, troubleshooting, and incident response

Error Handling

Permission and Access Issues:

• Verify credentials and permissions for all operations
• Request elevated access if required for specific tasks
• Document all permission requirements for automation
• Use separate service accounts for privileged operations
• Implement least-privilege access principles

Connection and Network Failures:

• Check network connectivity, firewalls, and security groups
• Verify service endpoints, DNS resolution, and routing
• Test connections using diagnostic and troubleshooting tools
• Review network policies, ACLs, and security configurations
• Implement retry logic with exponential backoff

Resource Constraints:

• Monitor resource usage (CPU, memory, disk, network)
• Implement throttling, rate limiting, or queue mechanisms
• Schedule resource-intensive tasks during low-traffic periods
• Scale infrastructure resources if consistently hitting limits
• Optimize queries, code, or configurations for efficiency

Configuration and Syntax Errors:

• Validate all configuration syntax before applying changes
• Test configurations thoroughly in non-production first
• Implement automated configuration validation checks
• Maintain version control for all configuration files
• Keep previous working configuration for quick rollback

Resources

Configuration Templates: {baseDir}/templates/database-diff-tool/

Documentation and Guides: {baseDir}/docs/database-diff-tool/

Example Scripts and Code: {baseDir}/examples/database-diff-tool/

Troubleshooting Guide: {baseDir}/docs/database-diff-tool-troubleshooting.md

Best Practices: {baseDir}/docs/database-diff-tool-best-practices.md

Monitoring Setup: {baseDir}/monitoring/database-diff-tool-dashboard.json