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TOTP From First Principles: Building an RFC 4226 / 6238 CLI in Rust

SEN LLC5d ago • 9 min read

TOTP From First Principles: Building an RFC 4226 / 6238 CLI in Rust

A small Rust CLI that generates TOTP / HOTP codes, parses otpauth:// URIs, and verifies...

#rust#cli#security#tutorial

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What's actually in a modern favicon set (and why everyone gets it wrong)

SEN LLC5d ago • 10 min read

What's actually in a modern favicon set (and why everyone gets it wrong)

What's actually in a modern favicon set (and why everyone gets it wrong) A tiny Python...

#python#cli#favicon#tutorial

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Shipping a Go CLI to Every Ecosystem: GitHub Releases, Homebrew, and npm

Kazu6d ago • 5 min read

Shipping a Go CLI to Every Ecosystem: GitHub Releases, Homebrew, and npm

The Problem: Great Tools Die in Obscurity You can build the fastest, most useful CLI tool...

#cli#github#go#npm

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Building a MIME Type Lookup CLI in TypeScript — 800+ Types, Magic Bytes, and Zero Dependencies

SEN LLC4d ago • 8 min read

Building a MIME Type Lookup CLI in TypeScript — 800+ Types, Magic Bytes, and Zero Dependencies

Building a MIME Type Lookup CLI in TypeScript — 800+ Types, Magic Bytes, and Zero...

#typescript#cli#mime#fileformat

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I built a CLI snippet manager in Rust because I was tired of googling the same things

OmarApr 13, 2026 • 2 min read

I built a CLI snippet manager in Rust because I was tired of googling the same things

I have a habit. Every time I sit down to code I end up googling the same thing, how to center a div,...

#rust#cli#opensource#productivity

1 1

Building an XPath Query Tool in PHP — Slice XML Like a Pro

SEN LLC4d ago • 8 min read

Building an XPath Query Tool in PHP — Slice XML Like a Pro

Building an XPath Query Tool in PHP — Slice XML Like a Pro A zero-dependency PHP CLI that...

#php#cli#xml#xpath

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Built a CLI that tells me what I'm spending on AI APIs before the invoice does

Joe Davies3d ago • 1 min read

Built a CLI that tells me what I'm spending on AI APIs before the invoice does

I kept finishing coding sessions with a small idea what I'd just spent on API calls :'D. The...

#opensource#ai#cli#showdev

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SQLite's PRAGMAs You Never Remember — I Put Them in a CLI

SEN LLC5d ago • 8 min read

SQLite's PRAGMAs You Never Remember — I Put Them in a CLI

SQLite's PRAGMAs You Never Remember — I Put Them in a CLI When you're handed an unknown...

#rust#sqlite#cli#tutorial

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How I built a progress bar library in 300 lines of Python

k38f4d ago • 6 min read

How I built a progress bar library in 300 lines of Python

I wanted a pretty progress bar for my scripts without pulling in a big library. So I built one from....

#python#tutorial#cli#opensource

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Designing a CLI for Both Humans and Agents

Julien Vallini5d ago • 5 min read

Designing a CLI for Both Humans and Agents

Learn how Alpic designed its CLI for both human developers and AI agents — covering tradeoffs like p...

#cli#ai#devtools#opensource

27 2

Your terminal is mass, here are 280+ tools to fix it

GDS K S5d ago • 5 min read

Your terminal is mass, here are 280+ tools to fix it

I replaced every classic Unix tool I use daily. Here's what I found.

#showdev#cli#terminal#opensource

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GDS K S5d ago • 4 min read

I stopped memorizing openssl flags

Every few weeks I need to do something with a certificate. Check when it expires. Look at what SANs....

#rust#cli#security#productivity

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Claude Code forgot my architecture 3 times last week. I fixed it with one SQLite file.

thestack_ai3d ago • 7 min read

Claude Code forgot my architecture 3 times last week. I fixed it with one SQLite file.

A local-first CLI + MCP server that gives coding agents persistent memory. One SQLite file. Four ker...

#ai#cli#typescript#mcp

6 1

I built a remote control for Cortex Code in Slack so I can step away from my laptop

DashApr 13, 2026 • 9 min read

I built a remote control for Cortex Code in Slack so I can step away from my laptop

Snowflake Cortex Code CLI Meets Slack Cortex Code CLI is Snowflake's AI coding agent that...

#agents#ai#cli#showdev

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I built a CLI that roasts HTTP status codes instead of just logging them

Bhabishya Bhatt2d ago • 5 min read

I built a CLI that roasts HTTP status codes instead of just logging them

Terminal output during local dev is boring. A 500 error scrolls by as a single dim line and you...

#node#typescript#cli#opensource

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Writing Cron Semantics in ~100 Lines of TypeScript

SEN LLC4d ago • 8 min read

Writing Cron Semantics in ~100 Lines of TypeScript

Writing Cron Semantics in ~100 Lines of TypeScript A tiny in-process cron-style scheduler...

#typescript#cron#cli#tutorial

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green-linter: Your Project's Carbon Footprint in One Command

CARLOS ENRIQUE CASTRO LAZARO1d ago • 6 min read

green-linter: Your Project's Carbon Footprint in One Command

This is a submission for Weekend Challenge: Earth Day Edition What I Built green-linter....

#devchallenge#weekendchallenge#rust#cli

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Generate Terminal Recordings for Your CLI Docs Without Touching asciinema

Bala Paranj6d ago • 3 min read

Generate Terminal Recordings for Your CLI Docs Without Touching asciinema

CLI documentation has a trust problem. Users read your examples, try to reproduce them, and get...

#go#cli#documentation#devops

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The Self-Evolving AI Agent: How to Stop Correcting Your LLM Twice

Onur Cinar22h ago • 3 min read

The Self-Evolving AI Agent: How to Stop Correcting Your LLM Twice

We’ve all been there. You’re working on a lightweight Go microservice. You ask your AI agent to add ...

#ai#productivity#agents#cli

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Implementing semver 2.0.0 from scratch in TypeScript — no semver package allowed

SEN LLC4d ago • 9 min read

Implementing semver 2.0.0 from scratch in TypeScript — no semver package allowed

Implementing semver 2.0.0 from scratch in TypeScript — no semver package...

#typescript#cli#semver#devtools

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Slugifying Japanese URLs Is Harder Than You Think — I Built a Focused CLI

SEN LLC5d ago • 10 min read

Slugifying Japanese URLs Is Harder Than You Think — I Built a Focused CLI

Slugifying Japanese URLs Is Harder Than You Think — I Built a Focused CLI Most slug...

#python#japanese#cli#tutorial

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Writing dig in 500 Lines of Rust (with hickory-resolver, the trust-dns successor)

SEN LLC4d ago • 10 min read

Writing dig in 500 Lines of Rust (with hickory-resolver, the trust-dns successor)

Writing dig in 500 Lines of Rust (with hickory-resolver, the trust-dns successor) dig is...

#rust#dns#cli#tutorial

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My numpy rewrite was 300x faster in isolation. End-to-end it was slower.

Yuvraj Angad Singh9h ago • 5 min read

My numpy rewrite was 300x faster in isolation. End-to-end it was slower.

my CLI search took 4.3 seconds for 5000 files. i swapped the python cosine loop for a numpy matmul.....

#embeddings#python#performance#cli

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Generating a Valid RSS Feed From Scratch in Stdlib Python

SEN LLC5d ago • 10 min read

Generating a Valid RSS Feed From Scratch in Stdlib Python

Generating a Valid RSS Feed From Scratch in Stdlib Python Every static site generator...

#python#cli#rss#tutorial

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Tech Articles

TOTP From First Principles: Building an RFC 4226 / 6238 CLI in Rust

What's actually in a modern favicon set (and why everyone gets it wrong)

Shipping a Go CLI to Every Ecosystem: GitHub Releases, Homebrew, and npm

Building a MIME Type Lookup CLI in TypeScript — 800+ Types, Magic Bytes, and Zero Dependencies

I built a CLI snippet manager in Rust because I was tired of googling the same things

Building an XPath Query Tool in PHP — Slice XML Like a Pro

Built a CLI that tells me what I'm spending on AI APIs before the invoice does

SQLite's PRAGMAs You Never Remember — I Put Them in a CLI

How I built a progress bar library in 300 lines of Python

Designing a CLI for Both Humans and Agents

Your terminal is mass, here are 280+ tools to fix it

I stopped memorizing openssl flags

Claude Code forgot my architecture 3 times last week. I fixed it with one SQLite file.

I built a remote control for Cortex Code in Slack so I can step away from my laptop

I built a CLI that roasts HTTP status codes instead of just logging them

Writing Cron Semantics in ~100 Lines of TypeScript

green-linter: Your Project's Carbon Footprint in One Command

Generate Terminal Recordings for Your CLI Docs Without Touching asciinema

The Self-Evolving AI Agent: How to Stop Correcting Your LLM Twice

Implementing semver 2.0.0 from scratch in TypeScript — no semver package allowed

Slugifying Japanese URLs Is Harder Than You Think — I Built a Focused CLI

Writing dig in 500 Lines of Rust (with hickory-resolver, the trust-dns successor)

My numpy rewrite was 300x faster in isolation. End-to-end it was slower.

Generating a Valid RSS Feed From Scratch in Stdlib Python