Interests in ML and social aspects of tech. Building For You feed: https://foryou.club https://bsky.app/profile/spacecowboy17.bsky.social/feed/for-you Hobby project: linklonk.comhttps://bsky.app/profile/spacecowboy17.bsky.socialhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mvfv4bu4bk2rLast week I ran an A/B test in For You where the treatment arm had a higher penalty for popular items and items with more paths leading to them were boosted more. Statistically significant results: 0.6% more users liked at least something on a given day 4.7% more likes per user13 Sep 2026 15:14 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mvfv4bu4bk2rhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mve2a4cy722bI'm not nitpicking on @gruber.foo but clearly atproto needs more evangelizing, education, marketing if tech people like Gruber don't get things like this right: - uses "username@bsky.app" instead of "username.bsky.social" - refers to the domain name as the identity instead of just being a handle... [contains quote post or other embedded content]12 Sep 2026 21:40 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mve2a4cy722bhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3muugd5slds2lPSA: you can find out which of your likes caused For You to show any given post at foryou.club/explain Just enter the post URL and hit "Explain":06 Sep 2026 16:34 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3muugd5slds2lhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3muqeufzhac2sFor the last 6 months this drive was used exclusively for serving the For You feed Some stats: - 28% of wear - good thing I've set up daily backup to hdd - ~600TB written - 472TB read - weird that it is less than writes [contains quote post or other embedded content]05 Sep 2026 01:57 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3muqeufzhac2shttps://bsky.app/profile/spacecowboy17.bsky.social/post/3muq4zasvlc2sRandom fact: the number of people who enabled hideFromAlgorithmicRecommendations is 796704 Sep 2026 23:36 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3muq4zasvlc2shttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mul5iq37vs2sHmm, spelling it out actually makes it easy to test out the opposite - what if Bluesky was 2x smaller, how much worse would For You become? To do that I just need to make For You only pay attention to the posts authored by users and liked by users with even hash values of the DID. Thanos style.03 Sep 2026 00:02 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mul5iq37vs2shttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mub4slwh2s24I'm setting up backup for the For You database and I'm trying to do a restore from the backup on the hard-drive to the nvme. This eats up all disk IO and makes the feed super slow. I should get it back up in 20 minutes. [contains quote post or other embedded content]30 Aug 2026 00:23 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mub4slwh2s24https://bsky.app/profile/spacecowboy17.bsky.social/post/3mu6pg3e7vs2fFor You users are liking 1 million posts a day - crazy! There are ~20M likes per day, which makes For You account for 5% of it.29 Aug 2026 01:18 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mu6pg3e7vs2fhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mtvsrdzovk2fA common misconception about Bluesky is that it "has no algorithm". In fact it has many algorithms - custom feeds. You can choose which one to use. What does it look like? You can replace the built-in fyp called Discover with a custom For You that runs on my gaming pc in 23 seconds:25 Aug 2026 12:24 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mtvsrdzovk2fhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mtrmyh4y222hWhat do custom feeds like For You look like for permissioned spaces?23 Aug 2026 20:30 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mtrmyh4y222hhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mtokuq6k5224I finally looked into why the For You sqlite db file has been growing to be quite large - 589GB. To prevent the unlimited growth I regularly delete likes older than 90 days. The size of the "ratings" table should be stable (there are ~20M likeds per day). Turns out another source of growth is...22 Aug 2026 15:14 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mtokuq6k5224https://bsky.app/profile/spacecowboy17.bsky.social/post/3mtncvsutfc24When you complain about discourse you are participating in it. Wait...22 Aug 2026 03:19 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mtncvsutfc24https://bsky.app/profile/spacecowboy17.bsky.social/post/3mtn75xapsc2gAhh, For You is returning errors because Bluesky added another ip address from which to make requests (38.142.8.130) and I need to give it a higher QPS limit in nginx. I wonder why nobody mentioned this yet...22 Aug 2026 02:12 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mtn75xapsc2ghttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mtfoo4bvok2xI showed this survey post to For You users over the last 9 days. 1099 people submitted their response. Thanks everyone who participated and replied to the post with more details! I will spend some time analyzing the numbers and will publish the results on blog.foryou.club [contains quote post or other embedded content]19 Aug 2026 02:28 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mtfoo4bvok2xhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mta4oy6fvs2bIt looks like we are back for real this time. Curious to read the postmortem. Here is the shape of the outage from the perspective of the For You feed. There were a couple of recovery spikes. Jetstream was also down and recovered a bit after the app started working again.16 Aug 2026 21:23 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mta4oy6fvs2bhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mt7ie34mrs26It looks like the outage is slowly recovering?16 Aug 2026 15:19 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mt7ie34mrs26https://bsky.app/profile/spacecowboy17.bsky.social/post/3mt4pis6esc2aTrying out another idea to make For You more balanced with respect to your past likes. https://blog.foryou.club/3mt4pirfqpk2a?utm_source=bluesky&utm_medium=social&utm_campaign=publish&utm_content=did%3Aplc%3A3guzzweuqraryl3rdkimjamk%2F3mt4pis6esc2a15 Aug 2026 12:49 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mt4pis6esc2ahttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mswiumvefc2zFor You but cross-lexicon: find people who liked the same Bluesky posts as you and show you what they: - liked on standard.site - starred on tangled - rsvp'ed on atmo.rsvp - saved on semble.so - listened to on teal.fm - etc [contains quote post or other embedded content]13 Aug 2026 01:34 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mswiumvefc2zhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3msnuruy3g222Suppose there is a version or a mode of For You that works twice as hard to find good posts. 1. What would you name it? 2. What emoji would go well with it?09 Aug 2026 15:13 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3msnuruy3g222https://bsky.app/profile/spacecowboy17.bsky.social/post/3msjyn2hjys2uI want to do some user research. Is a "cup of coffee" the most universal measure of value? Or is there anything better?08 Aug 2026 02:12 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3msjyn2hjys2uhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mrdqgkoc722mThis is why we have "For You Rewind": https://bsky.app/profile/spacecowboy17.bsky.social/feed/for-you-rewind [contains quote post or other embedded content]23 Jul 2026 21:04 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mrdqgkoc722mhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mqeom2gls22iIf you in the same boat as @scoiattolo.mountainherder.xyz and wish you could stop seeing someone's posts in For You then now you can! Got to foryou.club/profile/mutes and add accounts that you don't want to see specifically in For You. [contains quote post or other embedded content]11 Jul 2026 12:38 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mqeom2gls22ihttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mq76yu2wmc2iFor You is down because the hosting provider (OVH) seems to have issues.09 Jul 2026 08:16 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mq76yu2wmc2ihttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mptmbrqsed2nFor You now onboards new users with a curated list of interest posts to like. It's an upgrade over: "go like some posts elsewhere and come back".04 Jul 2026 17:42 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mptmbrqsed2nhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mplhgwmpjk2vThe change is live! Thanks @samuel.fm for getting it in and fixing the unit test! @devingaffney.com @aendra.com [contains quote post or other embedded content]01 Jul 2026 11:54 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mplhgwmpjk2vhttps://bsky.app/profile/spacecowboy17.bsky.social/post/3mpivlhc4pc2cCustom feeds can mark some posts as pinned. For You uses it for system messages like "Welcome to the feed" and such. But AppView ignores that flag when it hydrates the feed and the client app does not know which posts should be displayed as pinned. This should fix it: https://github.com/bluesky-social/atproto/pull/516330 Jun 2026 11:29 +0000at://did:plc:3guzzweuqraryl3rdkimjamk/app.bsky.feed.post/3mpivlhc4pc2c