Schema Diff

SkillAI & models

Compare two schema states and surface the risky changes. Use before applying migrations or after a model change.

Available today. Use it from your connected AI after setup.

No other account needed.

Connect ahel once, and every AI you use reads what you have installed.

Then ask your AI: use the Schema Diff skill

What this skill tells your AI

The instructions your AI receives, as published by archive228/loopkit in skills/schema-diff/SKILL.md and read by ahel’s review.

Diff old vs new schema. Flag by risk:

Destructive (high): dropped column/table, narrowed type, new NOT NULL on existing rows, dropped index a query relies on.
Locking (high at scale): index without CONCURRENTLY, type change that rewrites the table.
Safe: new nullable column, new table, new index CONCURRENTLY. For each destructive change: is data lost? is it reversible? is there a backfill? Output a risk-ranked list and a go/no-go with the safe rollout order.

Advanced