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This skill combines theoretical principles with practical tools to help architects and developers create scalable, performant, and maintainable database schemas.\n\n## Core Competencies\n\n### Schema Design & Analysis\n- **Normalization Analysis**: Automated detection of normalization levels (1NF through BCNF)\n- **Denormalization Strategy**: Smart recommendations for performance optimization\n- **Data Type Optimization**: Identification of inappropriate types and size issues\n- **Constraint Analysis**: Missing foreign keys, unique constraints, and null checks\n- **Naming Convention Validation**: Consistent table and column naming patterns\n- **ERD Generation**: Automatic Mermaid diagram creation from DDL\n\n### Index Optimization\n- **Index Gap Analysis**: Identification of missing indexes on foreign keys and query patterns\n- **Composite Index Strategy**: Optimal column ordering for multi-column indexes\n- **Index Redundancy Detection**: Elimination of overlapping and unused indexes\n- **Performance Impact Modeling**: Selectivity estimation and query cost analysis\n- **Index Type Selection**: B-tree, hash, partial, covering, and specialized indexes\n\n### Migration Management\n- **Zero-Downtime Migrations**: Expand-contract pattern implementation\n- **Schema Evolution**: Safe column additions, deletions, and type changes\n- **Data Migration Scripts**: Automated data transformation and validation\n- **Rollback Strategy**: Complete reversal capabilities with validation\n- **Execution Planning**: Ordered migration steps with dependency resolution\n\n## Database Design Principles\n→ See references\u002Fdatabase-design-reference.md for details\n\n## Best Practices\n\n### Schema Design\n1. **Use meaningful names**: Clear, consistent naming conventions\n2. **Choose appropriate data types**: Right-sized columns for storage efficiency\n3. **Define proper constraints**: Foreign keys, check constraints, unique indexes\n4. **Consider future growth**: Plan for scale from the beginning\n5. **Document relationships**: Clear foreign key relationships and business rules\n\n### Performance Optimization\n1. **Index strategically**: Cover common query patterns without over-indexing\n2. **Monitor query performance**: Regular analysis of slow queries\n3. **Partition large tables**: Improve query performance and maintenance\n4. **Use appropriate isolation levels**: Balance consistency with performance\n5. **Implement connection pooling**: Efficient resource utilization\n\n### Security Considerations\n1. **Principle of least privilege**: Grant minimal necessary permissions\n2. **Encrypt sensitive data**: At rest and in transit\n3. **Audit access patterns**: Monitor and log database access\n4. **Validate inputs**: Prevent SQL injection attacks\n5. **Regular security updates**: Keep database software current\n\n## Conclusion\n\nEffective database design requires balancing multiple competing concerns: performance, scalability, maintainability, and business requirements. This skill provides the tools and knowledge to make informed decisions throughout the database lifecycle, from initial schema design through production optimization and evolution.\n\nThe included tools automate common analysis and optimization tasks, while the comprehensive guides provide the theoretical foundation for making sound architectural decisions. Whether building a new system or optimizing an existing one, these resources provide expert-level guidance for creating robust, scalable database solutions.\n","# Database Designer - POWERFUL Tier Skill\n\n## Overview\n\nA comprehensive database design skill that provides expert-level analysis, optimization, and migration capabilities for modern database systems. This skill combines theoretical principles with practical tools to help architects and developers create scalable, performant, and maintainable database schemas.\n\n## Core Competencies\n\n### Schema Design & Analysis\n- **Normalization Analysis**: Automated detection of normalization levels (1NF through BCNF)\n- **Denormalization Strategy**: Smart recommendations for performance optimization\n- **Data Type Optimization**: Identification of inappropriate types and size issues\n- **Constraint Analysis**: Missing foreign keys, unique constraints, and null checks\n- **Naming Convention Validation**: Consistent table and column naming patterns\n- **ERD Generation**: Automatic Mermaid diagram creation from DDL\n\n### Index Optimization\n- **Index Gap Analysis**: Identification of missing indexes on foreign keys and query patterns\n- **Composite Index Strategy**: Optimal column ordering for multi-column indexes\n- **Index Redundancy Detection**: Elimination of overlapping and unused indexes\n- **Performance Impact Modeling**: Selectivity estimation and query cost analysis\n- **Index Type Selection**: B-tree, hash, partial, covering, and specialized indexes\n\n### Migration Management\n- **Zero-Downtime Migrations**: Expand-contract pattern implementation\n- **Schema Evolution**: Safe column additions, deletions, and type changes\n- **Data Migration Scripts**: Automated data transformation and validation\n- **Rollback Strategy**: Complete reversal capabilities with validation\n- **Execution Planning**: Ordered migration steps with dependency resolution\n\n## Database Design Principles\n→ See references\u002Fdatabase-design-reference.md for details\n\n## Best Practices\n\n### Schema Design\n1. **Use meaningful names**: Clear, consistent naming conventions\n2. **Choose appropriate data types**: Right-sized columns for storage efficiency\n3. **Define proper constraints**: Foreign keys, check constraints, unique indexes\n4. **Consider future growth**: Plan for scale from the beginning\n5. **Document relationships**: Clear foreign key relationships and business rules\n\n### Performance Optimization\n1. **Index strategically**: Cover common query patterns without over-indexing\n2. **Monitor query performance**: Regular analysis of slow queries\n3. **Partition large tables**: Improve query performance and maintenance\n4. **Use appropriate isolation levels**: Balance consistency with performance\n5. **Implement connection pooling**: Efficient resource utilization\n\n### Security Considerations\n1. **Principle of least privilege**: Grant minimal necessary permissions\n2. **Encrypt sensitive data**: At rest and in transit\n3. **Audit access patterns**: Monitor and log database access\n4. **Validate inputs**: Prevent SQL injection attacks\n5. **Regular security updates**: Keep database software current\n\n## Conclusion\n\nEffective database design requires balancing multiple competing concerns: performance, scalability, maintainability, and business requirements. This skill provides the tools and knowledge to make informed decisions throughout the database lifecycle, from initial schema design through production optimization and evolution.\n\nThe included tools automate common analysis and optimization tasks, while the comprehensive guides provide the theoretical foundation for making sound architectural decisions. Whether building a new system or optimizing an existing one, these resources provide expert-level guidance for creating robust, scalable database solutions.\n",{"name":5,"description":7},"main","dc799ac68cfdc454fc55edaf3f054651f645f738","engineering\u002Fdatabase-designer",10,"https:\u002F\u002Fgithub.com\u002FArogyaReddy\u002Falirezarezvani-claude-skills","https:\u002F\u002Fgithub.com\u002FArogyaReddy","2026-03-18 00:40:19",{"source":8,"skillName":5,"commands":39,"prompt":49,"zipAvailable":50},[40,43,46],{"tool":41,"command":42},"npx","npx skills add ArogyaReddy\u002Falirezarezvani-claude-skills --skill database-designer",{"tool":44,"command":45},"bunx","bunx skills add ArogyaReddy\u002Falirezarezvani-claude-skills --skill database-designer",{"tool":47,"command":48},"pnpm","pnpm dlx skills add ArogyaReddy\u002Falirezarezvani-claude-skills --skill 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device risk management specialist implementing ISO 14971 throughout product lifecycle. Provides risk analysis, risk evaluation, risk control, and post-production information analysis. Use when user mentions risk management, ISO 14971, risk analysis, FMEA, fault tree analysis, hazard identification, risk control, risk matrix, benefit-risk analysis, residual risk, risk acceptability, or post-market risk.","https:\u002F\u002Fgithub.com\u002FArogyaReddy\u002Falirezarezvani-claude-skills\u002Fblob\u002Fmain\u002Fra-qm-team\u002Frisk-management-specialist\u002FSKILL.md",[],[122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140,141],"risk","risk management specialist","management","risk management","risk analysis","risk evaluation","product","Evaluation","Production","lifecycle","analysis","use","risk matrix","Market","control","iso","medical","iso 14971","identification","post",{"skillNo":143,"name":144,"nameZh":6,"description":145,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":146,"categories":147,"keywords":148,"publishedAt":26},"01M6EKFDZ7KES3X3HH8KBHR9JF","regulatory-affairs-head","Senior Regulatory Affairs Manager for HealthTech and MedTech companies. Prepares FDA 510(k), De Novo, and PMA submission packages; analyzes regulatory pathways for new medical devices; drafts responses to FDA deficiency letters and Notified Body queries; develops CE marking technical documentation under EU MDR 2017\u002F745; coordinates multi-market approval strategies across FDA, EU, Health Canada, PMDA, and NMPA; and maintains regulatory intelligence on evolving standards. Use when users need to plan or execute FDA submissions, navigate 510(k) or PMA approval processes, achieve CE marking, prepare pre-submission meeting materials, write regulatory strategy documents, respond to agency queries, or manage compliance documentation for medical device market access.","https:\u002F\u002Fgithub.com\u002FArogyaReddy\u002Falirezarezvani-claude-skills\u002Fblob\u002Fmain\u002Fra-qm-team\u002Fregulatory-affairs-head\u002FSKILL.md",[],[149,150,151,152,153,154,155,156,157,158,159,160,161,162,138,163,164,165,166,167],"regulatory affairs head","regulatory","head","documentation","documents","packages","plan","access","write","evidence","standards","intelligence","across","strategies","clinical","pathway","de","respond","medical devices",{"skillNo":169,"name":170,"nameZh":6,"description":171,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":172,"categories":173,"keywords":182,"publishedAt":26},"01M6EKF980P5MQBEQQAKB2JE6V","quality-manager-qms-iso13485","ISO 13485 Quality Management System implementation and maintenance for medical device organizations. 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Useful for quality management, audit preparation, regulatory compliance, medical device documentation, and corrective action workflows.","https:\u002F\u002Fgithub.com\u002FArogyaReddy\u002Falirezarezvani-claude-skills\u002Fblob\u002Fmain\u002Fra-qm-team\u002Fquality-manager-qms-iso13485\u002FSKILL.md",[174,177],{"categoryNo":175,"categoryName":176,"taxonomyType":20,"taxonomyTypeDesc":21},"01JBSEEDCAT000000000000015","视觉设计",{"categoryNo":178,"categoryName":179,"taxonomyType":180,"taxonomyTypeDesc":181},"01JBSEEDCAT000000000000032","设计师","PROFESSION","适用职业",[183,184,185,186,187,188,152,189,190,191,192,133,193,194,195,136,137,138,196,197],"quality manager qms iso13485","quality","design","review","support","workflows","audit","actions","compliance","system","up","maintenance","document","records","ISO 13485",{"skillNo":199,"name":200,"nameZh":6,"description":201,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":202,"categories":203,"keywords":207,"publishedAt":26},"01M6EKF4ZN8ZJJP3K6FM1WEM85","quality-manager-qmr","Senior Quality Manager Responsible Person (QMR) for HealthTech and MedTech companies. Provides quality system governance, management review leadership, regulatory compliance oversight, and quality performance monitoring per ISO 13485 Clause 5.5.2.","https:\u002F\u002Fgithub.com\u002FArogyaReddy\u002Falirezarezvani-claude-skills\u002Fblob\u002Fmain\u002Fra-qm-team\u002Fquality-manager-qmr\u002FSKILL.md",[204],{"categoryNo":205,"categoryName":206,"taxonomyType":180,"taxonomyTypeDesc":181},"01JBSEEDCAT000000000000037","律师与法务",[208,184,186,209,210,211,212,191,213,192,124,214,150,215,216,217,137,197],"quality manager qmr","policy","performance","governance","monitoring","regulatory compliance","oversight","cost","culture","leadership",{"skillNo":219,"name":220,"nameZh":6,"description":221,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":222,"categories":223,"keywords":228,"publishedAt":26},"01M6EKF15YKH2AQB45MH4Y6S08","quality-documentation-manager","Document control system management for medical device QMS. Covers document numbering, version control, change management, and 21 CFR Part 11 compliance. Use for document control procedures, change control workflow, document numbering, version management, electronic signature compliance, or regulatory documentation review.","https:\u002F\u002Fgithub.com\u002FArogyaReddy\u002Falirezarezvani-claude-skills\u002Fblob\u002Fmain\u002Fra-qm-team\u002Fquality-documentation-manager\u002FSKILL.md",[224,227],{"categoryNo":225,"categoryName":226,"taxonomyType":20,"taxonomyTypeDesc":21},"01JBSEEDCAT000000000000002","文档处理",{"categoryNo":205,"categoryName":206,"taxonomyType":180,"taxonomyTypeDesc":181},[152,229,184,186,230,231,189,131,232,192,233,234,235,236,237,138,238,239,240,241],"quality documentation manager","workflow","change","document lifecycle","change management","list","master","system management","documentation review","cfr","21 cfr part 11","change control","retention",{"skillNo":243,"name":244,"nameZh":6,"description":245,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":6,"repositoryNo":12,"starsCount":13,"licenseSpdxId":14,"licenseFileUrl":6,"sourceHtmlUrl":246,"categories":247,"keywords":248,"publishedAt":26},"01M6EKEXQMCQC11A5WR9GEPC4S","qms-audit-expert","ISO 13485 internal audit expertise for medical device QMS. Covers audit planning, execution, nonconformity classification, and CAPA verification. Use for internal audit planning, audit execution, finding classification, external audit preparation, or audit program management.","https:\u002F\u002Fgithub.com\u002FArogyaReddy\u002Falirezarezvani-claude-skills\u002Fblob\u002Fmain\u002Fra-qm-team\u002Fqms-audit-expert\u002FSKILL.md",[],[189,249,250,251,252,253,254,255,124,133,256,257,137,138,197],"qms audit expert","expert","planning","verification","execution","classification","schedule","checklist","device"]