Daily issue / 2026-10-05
Useful things that surfaced in Hacker News discussions on 2026-10-05. Open the context to see why each one caught our attention—or jump straight to the original thread.
What we found
Agent decision recorder that captures chosen paths and rejected alternatives after a session.
Source discussion: Agents don't need memory, they need documentation
“This just does a pass at the end, rather than consume context all the time. I've been using it for months and it works great.”
stavros · recommendation · author or maintainer
Direct HN comment
Versioned engineering principles for coding agents; the creator reports strong adherence in practice.
Source discussion: Agents don't need memory, they need documentation
“System still evolving, but the last two-ish months that I've used it has served me really, really well, And it's been even better with the latest models. I've had surprisingly good adherence from agents on this technique.”
bushido · recommendation · author or maintainer
Direct HN comment
Performance trace viewer recommended by a commenter as an excellent modern gpuvis alternative.
Source discussion: gpuvis: GPU Trace Visualizer
“I've found perfetto [1] to be a excellent modern alternative to gpuvis.”
shadeslayer · recommendation · first hand use
Direct HN comment
Apple's computer-vision framework; a commenter recommends its OCR over Tesseract on macOS.
Source discussion: Show HN: AI search for every photo and every frame of video on macOS
“Since this is for the mac you really should be using apple's vision framework for OCR. It smokes tesseract in both speed and accuracy.”
postalcoder · recommendation
Direct HN comment
Intuition-first mathematics explanations, strongly recommended in a discussion about how to teach maths.
Source discussion: Math's pedagogical curse – Grant Sanderson [video] (2023)
“Regarding intuition, I highly recommend https://betterexplained.com as a great example of an alternative approach that aligns with your ideas.”
chrisweekly · recommendation
Direct HN comment
Alsina and Nelsen's book on understanding mathematics through images and visual reasoning.
Source discussion: Math's pedagogical curse – Grant Sanderson [video] (2023)
“I recently came to know of the following which others might also find useful; 1) Math Made Visual: Creating Images for Understanding Mathematics by Claudi Alsina and Roger Nelsen”
rramadass · recommendation
Direct HN comment
Interactive mechanical-watch explainer by Bartosz Ciechanowski, praised alongside a hands-on clock build.
Source discussion: Show HN: Glashütte Trash Clock – A 30-minute pendulum clock made from trash
“(I love both, just opposite in the color vs dryness, jank vs precision, "build first, principles later" approach).”
geerlingguy · recommendation
Direct HN comment
Bob Cringely's aircraft-building documentary, praised as a fascinating failure and filmmaking salvage exercise.
Source discussion: Tell HN: Bob Cringely has died
“The documentary is a fascinating failure and a masterclass in attempting to salvage a show when the whole premise for the show completely collapses.”
JKCalhoun · recommendation · first hand use
Direct HN comment
British Museum video exploring unusual clocks and watches, including gravity-powered mechanisms.
Source discussion: Show HN: Glashütte Trash Clock – A 30-minute pendulum clock made from trash
“Some more cool clocks, including gravity based clocks (not hourglasses):”
Razengan · recommendation
Direct HN comment
Thirty-minute pendulum clock made from trash, praised for its build-first approach to mechanics.
Source discussion: Show HN: Glashütte Trash Clock – A 30-minute pendulum clock made from trash
“(I love both, just opposite in the color vs dryness, jank vs precision, "build first, principles later" approach).”
geerlingguy · recommendation
Direct HN comment