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D1 Migration Guard

D1 Migration Guard

Catch D1 migration bugs before wrangler apply does

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d1-migration-guard is a free, zero-dependency CLI that catches common Cloudflare D1 migration problems before wrangler d1 migrations apply does. It checks numbering, database config, destructive SQL, and trigger definitions that break Wrangler's SQL splitter. It only reads local files—never Wrangler or your database. MIT licensed, no signup, telemetry, or paid tier. Built to catch real, still-open Wrangler bugs.

D1 Migration Guard makers

Here are the founders, developers, designers and product people who worked on D1 Migration Guard

Matt Bridges@mattbridges
D1 Migration GuardD1 Migration Guard