Schema Comparator Skill

SkillDatabases & data

Compare database schemas between source and target environments for migration planning

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Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

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Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Schema Comparator SkillStart free

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/code-migration-modernization/skills/schema-comparator/SKILL.md and read by ahel’s review.

Compares database schemas between source and target environments to identify differences and generate migration scripts.

Purpose

Enable database migration planning for:

Schema diff generation
Data type mapping
Constraint comparison
Index analysis
Migration script generation

Capabilities

1. Schema Diff Generation

Compare table structures
Identify column differences
Detect missing objects
Generate change reports

2. Data Type Mapping

Map types across databases
Handle type conversions
Identify precision changes
Document compatibility

3. Constraint Comparison

Compare primary keys
Analyze foreign keys
Check unique constraints
Verify check constraints

4. Index Analysis

Compare index definitions
Identify missing indexes
Analyze index usage
Recommend optimizations

5. Stored Procedure Comparison

Compare procedure signatures
Identify logic differences
Detect parameter changes
Flag deprecated procedures

6. Migration Script Generation

Generate DDL scripts
Create rollback scripts
Handle dependencies
Order changes correctly

Tool Integrations

Tool	Databases	Integration Method
Flyway	Multi	CLI
Liquibase	Multi	CLI
Redgate SQL Compare	SQL Server	CLI
SchemaHero	Kubernetes	CLI
pgdiff	PostgreSQL	CLI
mysqldiff	MySQL	CLI

Output Schema

{
  "comparisonId": "string",
  "timestamp": "ISO8601",
  "source": {
    "type": "string",
    "connection": "string"
  },
  "target": {
    "type": "string",
    "connection": "string"
  },
  "differences": {
    "tables": {
      "added": [],
      "removed": [],
      "modified": []
    },
    "columns": [],
    "constraints": [],
    "indexes": [],
    "procedures": []
  },
  "migration": {
    "scripts": [],
    "order": [],
    "rollback": []
  }
}

Integration with Migration Processes

database-schema-migration: Primary comparison tool
data-format-migration: Schema analysis

Related Skills

data-migration-validator: Post-migration validation
query-translator: SQL conversion

Related Agents

database-migration-orchestrator: Uses for planning
data-architect-agent: Schema design review

Signals

GitHub stars: 2k
Forks: 112
Last commit: Sep 2026

Advanced

Item type: skill
Key: schema-comparator
Source: github.com/a5c-ai/babysitter

github.com/a5c-ai/babysitter