Laravel v12 Migration Guide — Lessons Learned

This document is a consolidated reference compiled from individual AI-assisted migration sessions. Its purpose is to give any future AI (or human) a head start by documenting what went wrong, why, and how it was resolved.

How to Use This Document

For AI assistants: Read this before attempting any Laravel v12 or related package upgrades. The issues listed here are real, observed problems — not hypothetical.
For humans: Use the table of contents to jump to relevant sections.

Package Upgrade Issues

Breaking Changes in Laravel v12

Breaking Changes in Third-Party Packages

Configuration & Environment Issues

Database & Migration Issues

Testing Issues

Miscellaneous Gotchas

Source Logs

Individual session logs are stored in the Logs/ subdirectory. Each log represents one AI session's raw notes. This combined guide extracts and organizes the actionable content from those logs.

Last updated: 2026-02-11

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