wtf is pgmemento?

pgMemento is a tool that keeps a detailed history of every change made to data in a PostgreSQL database. Instead of just storing the current state of your information, it records who changed what, when, and what the data looked like before and after. This means if someone accidentally deletes an important record or makes a bad update, you can trace back through the history, see exactly what happened, and even restore the data to a previous version. When you turn it on for a specific part of your database, it quietly watches every table. Instead of copying the entire record every time a single field changes, it only records the specific pieces of information that were actually updated. It saves these small changes in a central log. It also keeps track of structural changes, so if you rename a column or change a data type, it notes that too. This means it keeps a version history of both your data and the actual shape of your database tables over time. This is useful for teams building applications where data accountability matters. For example, a fintech startup could use it to see a complete timeline of a user's account balance changes for compliance purposes. An e-commerce company could track exactly when an order's shipping status was updated and by whom. It is designed for anyone who needs a reliable, built-in way to answer "what happened to this record, and when?" Notably, it records changes as they happen at the database level, rather than relying on your application code to remember to log things. This ensures no changes slip through the cracks, even if someone edits the database directly. It also logs only the specific fields that changed rather than saving full copies of rows every time, which keeps the storage footprint much smaller than a naive approach.