Migrations & upgrades: 6 real cases

Migrate two websites from WordPress to Wagtail with Claude Code

Over a weekend Claude Code moved two sites from WordPress to Wagtail, including server setup and testing; the poster says nothing broke.

Port a backend to Convex in four hours with Factory's Droid

The poster reports Factory Droid ported a tRPC/Drizzle backend to Convex in about 4 hours, with some bugs left to fix.

Migrate a 50-screen app from Firebase to Supabase with Claude Code

Going feature by feature with Claude Code, the poster moved about 85% of a 50-screen app from Firebase to Supabase in 10–20 days.

Poster says:~85% migrated in 10–20 days

Migrate 180 microservices to a new framework version with Cursor agents

Brex reports its self-hosted Cursor agents let one engineer migrate 180 microservices from Micronaut 3 to 4 in a month.

According to Brex:180 microservices migrated in one month

Port an HTML5 parser from Python to JavaScript with Codex CLI

Codex CLI ran largely unattended for about 4.5 hours and produced 9,000 lines of JavaScript passing 9,200 html5lib tests.

Poster says:Passes 9,200 html5lib tests

Upgrade a plugin to a new framework alpha with Codex CLI

A one-line Codex CLI loop read the Datasette 1.0a20 upgrade docs, fixed the failing tests and got a plugin passing again.