X's code1 min read
What X's published code can and can't tell you
What reading X's published code can tell you, and where it stops.
X has published the code behind its For You feed on GitHub. That's rare: you can check advice against the source instead of guessing.
What it can tell you
The code shows how the feed is put together: the steps a post goes through, and the settings the code starts with. When a Postglow tip is based on it, you can see which part.
What it can't tell you
- What X runs today. The published code is a snapshot. X can change settings or run tests without publishing them.
- Anything about your account. The code doesn't know you, so Postglow never turns it into a score or a promise of reach.
How Postglow uses it
Today, one suggestion uses it: the variety check. It looks at the topics and formats you tag on your own posts and tells you when one of them takes over. Every other suggestion comes with its own reason.
Each fact is checked against one version of the code and carries a date. When X publishes a newer version, a fact changes only after it's checked again.
Want the details? Every fact, with the file it comes from, is on the facts page.
Postglow isn't open yet.
I'm Ömer. I pick the first group and reply myself.