Notes on where your AI history goes.
Mostly things I found out the hard way while building an index over six different AI coding tools. Every claim about another tool is either quoted from its own documentation or measured on a real machine, and says which.
- 11 September 2026
99.81% of what I paid Claude Code for was reading, not writing
60,163 requests and 24.08 billion input tokens later, output turned out to be a rounding error. What the ratio means for what is worth optimising, and how to check your own in one command.
- 9 August 2026
Every AI memory tool assumes you have not started yet
Every memory MCP server I looked at starts empty on install day. Your Claude Code and Cursor history did not start today. What it means to read the transcripts instead of asking anyone to take notes.
- 8 August 2026
What we learned shipping agent memory
The correct answer scored 0.505. Random gibberish scored 0.525. What that taught me about retrieval precision, false-positive injection, and why most of the work in agent memory is deciding when to say nothing.
- 7 August 2026
How to search your Claude Code and Codex history without another subscription
You do not need to pay anyone anything to search a conversation you already had. The files are on disk. Here is where, and the grep and jq that actually pull text out of them.
- 7 August 2026
Claude Code deletes your chat history after 30 days
It is a default, not a bug, and almost nobody has read the setting. What cleanupPeriodDays actually does, and how to check yours before you need the file that is already gone.