Cassidy Williams
Wrapping up Blogvent 2025
Blogvent 2025 has concluded. Check out all the December posts from this year's series!
Daily Digest
Why TDD and AI coding tools exploit the same psychological flaws
Drew DeVault draws a provocative parallel between Test-Driven Development cults and GenAI adoption, arguing both exploit developers' psychological need to feel competent while potentially undermining actual code quality.
- TDD's hidden influence on architecture: While ensuring test coverage, TDD shapes codebases to be "testable" rather than well-designed, and provides no guarantee that passing tests verify the right behavior for actual user needs.
- The dopamine trap of development metrics: Both TDD's green test suites and AI's rapid output create addictive feedback loops through coverage percentages, CI badges, and productivity metrics that make developers feel competent regardless of actual code quality.
- AI coding agents as the new performance theater: GenAI tools let mediocre programmers experience the rush of 10x developer productivity, building "cathedrals" quickly that have beautiful test coverage but rotten foundations underneath.
- The psychological cost of shortcuts: Developers chase these tools despite knowing the externalities (environmental costs, job displacement) because the feeling of finally being "great" at programming overrides long-term concerns.
#tdd-psychology#ai-code-generation#developer-productivity-metrics#software-testing-culture#programming-dopamine-loops
View all daily digests →Latest Articles - Page 32
Chris Wellons (null program)
Unix "find" expressions compiled to bytecode
Author developed a bytecode compiler for Unix find expressions, which surprisingly performs better than the tree-walk interpreters used in real implementations.
Armin Ronacher
Advent of Slop: A Guest Post by Claude
Claude AI autonomously solved Advent of Code 2025 puzzles using a web browser skill, working independently to read prompts and submit solutions.
Alex Kladov (matklad)
Newtype Index Pattern In Zig
Using 32-bit indexes instead of pointers saves memory, improves CPU cache efficiency, and boosts performance by reducing memory bandwidth bottlenecks.
Cassidy Williams
Making the "End of Year Developer" nature documentary
A behind-the-scenes look at creating a nature documentary-style film about developers "working" during the holiday season.
Charity Majors
2025 was for AI what 2010 was for cloud
AI has become mainstream foundational technology in 2025, similar to how cloud computing transitioned from experimental to essential in 2010.
Armin Ronacher
A Year Of Vibes
The author reflects on 2025 as a transformative year, leaving Sentry to start a company and shifting from hands-on coding to AI-assisted programming.
Cassidy Williams
CSS for markdown blockquote attribution
Markdown-generated HTML blockquotes need proper CSS styling to look good.
Ned Batchelder
Generating data shapes with Hypothesis
Hypothesis can randomly generate schemas (not just data) to test a Hasher class, avoiding false positives from type mismatches like [0] vs [False].
Cassidy Williams
I like when apps are "finished"
Apps don't always need updates—sometimes software is just good enough as is.
antirez (Salvatore Sanfilippo)
Reflections on AI at the end of 2025
AI researchers now accept LLMs aren't just "stochastic parrots." Chain-of-thought reasoning improves outputs through internal search and RL.
Cassidy Williams
I have become more of a writing utensil snob
Writer admits to being a pen/pencil snob with too many writing utensils, but insists they have it under control.
Filippo Valsorda
Building a Transparent Keyserver
A guide to building a transparent keyserver in under 500 lines of code, featuring privacy protections, anti-poisoning measures, and witness cosigning.
Charity Majors
Hello World
A reflection on choosing which platforms to use and which professional fights are worth engaging in.
Dan Abramov (overreacted)
Introducing RSC Explorer
New hobby project called RSC Explorer has been launched.
Cassidy Williams
Configure your repositories with .github
The .github folder lets you customize and configure your GitHub repositories with special settings and files.
Tim Bray
Humanist Plumbing
A dripping faucet led to finding a plumber through a neighborhood chat group instead of struggling with unhelpful local stores or corporate solutions.
Gergely Orosz (Pragmatic Engineer)
The Pulse: Cloudflare’s latest outage proves dangers of global configuration changes (again)
Cloudflare suffered another major outage from a global config change, just two weeks after a similar incident, highlighting risks of instant worldwide deployments.
Ned Batchelder
A testing conundrum
Author creates a fingerprinting class for nested data structures but struggles to write comprehensive tests for all possible data shapes.
Eli Bendersky
Plugins case study: mdBook preprocessors
mdBook's preprocessor plugin system lets external programs modify book content before rendering, supporting any language to transform Markdown files.