Short notes on tech 49/2025

Advent

Advent of Code
“Advent of Code is an Advent calendar of small programming puzzles for a variety of skill levels that can be solved in any programming language you like.”

Advent of Sysadmin
“The Advent of Sysadmin is a 12-day Advent calendar of Linux and DevOps challenges of different difficulties that runs from December 1st to December 12th.”

AI tools

What data do coding agents send, and where to?
“Researchers analyzed network traffic from seven popular coding agents to determine data transmission, telemetry patterns, and privacy implications.” (from CloudSecList 313)

Writing a good CLAUDE.md
“Lots of interesting insights in this post by Kyle Mistele, starting with”:

Regardless of which model you’re using, you may notice that Claude frequently ignores your CLAUDE.md file’s contents….

The more information you have in the file that’s not universally applicable to the tasks you have it working on, the more likely it is that Claude will ignore your instructions in the file.

Infosec

NPM Security Best Practices
“Consolidated a list of information you might find useful in securing yourself against compromises, supply-chain attacks, malware, spam, phishing and incidents”

Software

Loop
“Window management made elegant. Loop is a macOS app that simplifies window management for you. You can effortlessly choose your window direction using a radial menu triggered by a simple key press”

POSSE Pary
“Justin Searls’ (anti-)social app for crossposting your site’s content “wherever your audience still hangs out” is now free (for non-commercial use) and self-hostable.” (from Changelog)


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