# Migration Twin Simulator

> Builds a SQL Server to PostgreSQL migration twin and rates query-family performance risk.

- Skill: `rweisssieker-xp/migration-twin-simulator` (Agent Skill)
- Install (CLI): `npx skillmds@latest add rweisssieker-xp/migration-twin-simulator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/rweisssieker-xp/migration-twin-simulator/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Data & Analytics
- Author: rweisssieker-xp (https://skillmd.com/u/rweisssieker-xp)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/rweisssieker-xp/migration-twin-simulator

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# Migration Twin Simulator

Run:

```bash
node runtime/runTool.js migration_twin_simulator '{"sourceEngine":"sqlserver","targetEngine":"postgres","queries":[{"queryId":"q1","sql":"SELECT TOP 100 * FROM events"}]}'
```

Returns query risks, overall risk, and migration next actions.