This is a special post for quick takes by Linch. Only they can create top-level comments. Comments here also appear on the Quick Takes page and All Posts page.
Claude Opus 4.7 can reliably truesight me on any unpublished blog post draft or internal memo (including on topics I've never written publicly before on).
It can also reliably know who I am in 3-5 excerpts of online comments (that I think *probably* is after the training cutoff), including from accounts that I don't publicly acknowledge a connection with (though I don't go out of my way to hide either).
It can't quite do it on excerpts of short fiction or private DMs yet (at least when I remove obvious clues like links to my substack), though I feel like this can't be long coming.
Maybe 75% my own Claude in incognito with memory and web search off, 25% asking friends to run different things. There was no dropoff when Adam Yedidia tested via the API, but apparently the most extreme example I've observed to date didn't work when papetoast tested it[1].
This is Opus 4.7 with Adaptive thinking, not incognito[1], didn't clear system prompt, web search disabled
"Instructions for Claude"
Having strong opinions is fine. In fields where you can confidently tell I am familiar with, try to reply more technically. Otherwise, model how familiar I am with the topic and adjust the verbalness and deepness of your response accordingly. Feel free to be informal. (Your have been consistently overestimating my knowledge level basically all the time before adding this comment, so try to take your guess and tune it down by half a level). Your baseline prior should be undergrad level except for computer science stuff.
In all cases, be direct and to the point, I can take it.
Prefer to quantify things and use explicit probabilities. use ranges when exact data lacking
1. ^
I couldn't bother exporting the information out without the one click share this time.