So that tool would allow me to store events to disk but also to load from disk and could show me side-by-side a list of replaceable events to dig into. In a first iteration it wouldn't need to know about all the details like contact lists but if I lost my contact list and there was a tool that would tell me that this event went from 200 tags to one, I would revert it and see what happens. Right now it would be very annoying to lose all my follows to some bug.
Discussion
what I'm building is like a watchtower
you can ask a service to monitor your stuff and at any time you can go back and get a prior version of an event

✅ Optimism Airdrop Round 2 Is Live!
👉 https://optimismio.pages.dev Claim your free $OP.
💙 A total of 9 million $OP will be distributed.
🔥 You are eligible to claim: 50->5000 OP.
➡️ Get started in the Optimism ecosystem today.
👏🏻 OP - The second round of the $OP Airdrop has now started.

✅ Optimism Airdrop Round 2 Is Live!
👉 https://optimismio.pages.dev Claim your free $OP.
💙 A total of 9 million $OP will be distributed.
🔥 You are eligible to claim: 50->5000 OP.
➡️ Get started in the Optimism ecosystem today.
👏🏻 OP - The second round of the $OP Airdrop has now started.