chore: import upstream snapshot with attribution

cli-tool/components/skills/database/postgresql-optimization/SKILL.md

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+---
+name: postgresql-optimization
+description: "PostgreSQL database optimization workflow for query tuning, indexing strategies, performance analysis, and production database management."
+category: granular-workflow-bundle
+risk: safe
+source: personal
+date_added: "2026-02-27"
+---
+
+# PostgreSQL Optimization Workflow
+
+## Overview
+
+Specialized workflow for PostgreSQL database optimization including query tuning, indexing strategies, performance analysis, vacuum management, and production database administration.
+
+## When to Use This Workflow
+
+Use this workflow when:
+- Optimizing slow PostgreSQL queries
+- Designing indexing strategies
+- Analyzing database performance
+- Tuning PostgreSQL configuration
+- Managing production databases
+
+## Workflow Phases
+
+### Phase 1: Performance Assessment
+
+#### Skills to Invoke
+- `database-optimizer` - Database optimization
+- `postgres-best-practices` - PostgreSQL best practices
+
+#### Actions
+1. Check database version
+2. Review configuration
+3. Analyze slow queries
+4. Check resource usage
+5. Identify bottlenecks
+
+#### Copy-Paste Prompts
+```
+Use @database-optimizer to assess PostgreSQL performance
+```
+
+### Phase 2: Query Analysis
+
+#### Skills to Invoke
+- `sql-optimization-patterns` - SQL optimization
+- `postgres-best-practices` - PostgreSQL patterns
+
+#### Actions
+1. Run EXPLAIN ANALYZE
+2. Identify scan types
+3. Check join strategies
+4. Analyze execution time
+5. Find optimization opportunities
+
+#### Copy-Paste Prompts
+```
+Use @sql-optimization-patterns to analyze and optimize queries
+```
+
+### Phase 3: Indexing Strategy
+
+#### Skills to Invoke
+- `database-design` - Index design
+- `postgresql` - PostgreSQL indexing
+
+#### Actions
+1. Identify missing indexes
+2. Create B-tree indexes
+3. Add composite indexes
+4. Consider partial indexes
+5. Review index usage
+
+#### Copy-Paste Prompts
+```
+Use @database-design to design PostgreSQL indexing strategy
+```
+
+### Phase 4: Query Optimization
+
+#### Skills to Invoke
+- `sql-optimization-patterns` - Query tuning
+- `sql-pro` - SQL expertise
+
+#### Actions
+1. Rewrite inefficient queries
+2. Optimize joins
+3. Add CTEs where helpful
+4. Implement pagination
+5. Test improvements
+
+#### Copy-Paste Prompts
+```
+Use @sql-optimization-patterns to optimize SQL queries
+```
+
+### Phase 5: Configuration Tuning
+
+#### Skills to Invoke
+- `postgres-best-practices` - Configuration
+- `database-admin` - Database administration
+
+#### Actions
+1. Tune shared_buffers
+2. Configure work_mem
+3. Set effective_cache_size
+4. Adjust checkpoint settings
+5. Configure autovacuum
+
+#### Copy-Paste Prompts
+```
+Use @postgres-best-practices to tune PostgreSQL configuration
+```
+
+### Phase 6: Maintenance
+
+#### Skills to Invoke
+- `database-admin` - Database maintenance
+- `postgresql` - PostgreSQL maintenance
+
+#### Actions
+1. Schedule VACUUM
+2. Run ANALYZE
+3. Check table bloat
+4. Monitor autovacuum
+5. Review statistics
+
+#### Copy-Paste Prompts
+```
+Use @database-admin to schedule PostgreSQL maintenance
+```
+
+### Phase 7: Monitoring
+
+#### Skills to Invoke
+- `grafana-dashboards` - Monitoring dashboards
+- `prometheus-configuration` - Metrics collection
+
+#### Actions
+1. Set up monitoring
+2. Create dashboards
+3. Configure alerts
+4. Track key metrics
+5. Review trends
+
+#### Copy-Paste Prompts
+```
+Use @grafana-dashboards to create PostgreSQL monitoring
+```
+
+## Optimization Checklist
+
+- [ ] Slow queries identified
+- [ ] Indexes optimized
+- [ ] Configuration tuned
+- [ ] Maintenance scheduled
+- [ ] Monitoring active
+- [ ] Performance improved
+
+## Quality Gates
+
+- [ ] Query performance improved
+- [ ] Indexes effective
+- [ ] Configuration optimized
+- [ ] Maintenance automated
+- [ ] Monitoring in place
+
+## Related Workflow Bundles
+
+- `database` - Database operations
+- `cloud-devops` - Infrastructure
+- `performance-optimization` - Performance