HN Hall of Fame Weekly email

Show HN: ChangeDetection, monitor any website change

github.com Software & code Software projects Software engineering Candidate
Screenshot of github.com captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 3 calendar years, with breakout response in 2 of them.

submissions
4
submitters
2
observed span
2021–2023
peak thread · 56 comments
253 pts
latest 20+ return · 2023-09-01
253 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

A few years ago when I was a Junior engineer, I worked for a company which would provide us with free tickets to any sports team in our city. I'm not a sports fan, but my stepdad loves hockey. When the tickets went up, they got reserved pretty fast. I noticed that the site we used to reserve the tickets had a predictable slug like: `{company}-hockey-tickets-2016-season`, and `{company}-hockey-tickets-2015-season`. The sites also didn't change between each refresh. So, when it was…

There seem to be a lot of these services ("scrape X in order to generate an RSS/webhook/etc. change feed for X"), but I feel that I can't rely on any of them. For anything that I would need this particular service for, my highest-concern requirement is that I'm able able to "set and forget" the service for literal years at a time. But almost always, services like this just drop dead eventually; or they tweak their scraping algorithms in ways…

derefr·147-point thread·

A way to live your 'data-life' proactively, avoid the noise and just monitor what you need to know about.

biggunz·1-point thread·

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
402

reference only — not used in Hall rules or ranking

Total comments
86

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2021-02-01Show HN: Self-hosted web page change detection/monitoringbiggunz10
2022-01-03Show HN: Changedetection.io detect changes in websites and JSON feedsFirst breakoutbiggunz14729
2023-05-21Changedetection.io “turns websites into news” releases 0.42biggunz11
2023-09-01Show HN: ChangeDetection, monitor any website changeBest thread · Latest 20+ point returnserhack_25356