Blog
Sharing insights on web development, security, and tools
2026
05/27
AI13 min read
What Is Harness Engineering: From Prompts to a Full Agent Wrapper
OpenAI introduced Harness Engineering in 2026 as a name for everything that wraps a large language model. This guide walks the path from prompt engineering to context engineering to the full four-layer harness, with Claude Code as a concrete reference for how it lands in practice.
New05/25
Network13 min read
Cloudflare Tunnel in Practice: Expose Your Home Lab Without a Public IP
No public IP, no VPS, no router port forwarding — Cloudflare Tunnel lets you publish your NAS, blog, or HomeAssistant to the internet through a single outbound connection. This guide takes you from concepts to a working deployment.
05/24
Tutorial15 min read
The Complete Guide to Building a Telegram Bot: From Creation to Deployment
A step-by-step guide to building your own Telegram bot — from registering with BotFather, choosing a framework (Python or Node.js), writing your first handler, to deploying in production.
05/21
SSH10 min read
SSH Key Authentication Guide: Ditch Passwords, Secure Your VPS
A complete walkthrough of SSH key authentication from concepts to hands-on setup. Covers key generation, VPS passwordless login, Windows configuration, and common troubleshooting.
05/15
AI15 min read
The Complete MCP Protocol Guide: Internals, Implementation, and 7 Production Pitfalls
What exactly is the MCP that Claude Code, Cursor, and ChatGPT Desktop all use? This guide walks the protocol design, server implementation (Python and TypeScript), three transport modes, the Tool/Resource/Prompt triplet, and 7 pitfalls that hit production teams.
05/04
VPS12 min read
HostDare vs BandwagonHost: Routes, Bandwidth, and Pricing Compared
A factual comparison of HostDare and BandwagonHost for proxy deployments — covering CN2 GIA route quality, peak-hour stability, IP blocking policies, and protocol compatibility.
04/27
Network14 min read
Modern Domains in Practice: Registrar Choice, DNS, and Full SPF/DKIM/DMARC Setup
Buying a domain is only the beginning — picking the wrong registrar costs hundreds extra per year, missing one DNS record breaks the whole site, and skipping SPF means your emails go straight to spam. This guide covers registrar comparison, DNS records, the email anti-spam trinity, and domain security.
2025
12/08
DevOps11 min read
Cron Expressions from Basics to Mastery: The Logic Behind 5 Fields and the Traps to Avoid
Five fields look simple — get one wrong and your daily backup might run once a year. This guide systematically covers cron syntax, dialect differences, common mistakes, and real-world examples.
11/17
Self-Hosted14 min read
The Self-Hosted Stack: Run Your Own Cloud with Docker Compose
Move Google Drive, password manager, photos, notes, and monitoring onto your own server. This guide strings 10 worth-it self-hosted apps together with Docker Compose, adds a reverse proxy and backup strategy, and gives you a private cloud that's 100% yours.
10/27
Security12 min read
Hash Algorithms Compared: How to Choose Between MD5, SHA-1, SHA-256, and bcrypt
Can MD5 still be used? Should passwords use SHA-256? bcrypt or Argon2? This guide uses real breach incidents to map every hash algorithm to its right scenarios — and which mistakes you absolutely must avoid.
10/13
Security14 min read
Modern Cryptography Cheat Sheet: Symmetric, Asymmetric, Hashing, Signatures — Which to Use?
AES or ChaCha20? RSA or Ed25519? When do you reach for digital signatures versus HMAC? This guide draws a single decision tree across the four core primitives of modern cryptography, with five mistakes every developer eventually makes.
09/22
Development13 min read
Regex from Zero to Mastery: 5 Real-World Patterns and the Catastrophic Backtracking Trap
Regex is the developer's daily bread — and a frequent source of bugs and outages. This guide covers core syntax, five real-world patterns (email, URL, IP, log parsing), and the catastrophic backtracking that took Cloudflare down globally in 2019.
09/08
Security14 min read
The Complete JWT Guide: Internals, 5 Security Pitfalls, and Production Best Practices
JWT solves stateless authentication in a single string — and brings a whole catalogue of security pitfalls with it. This guide walks the three-part structure, alg=none attacks, key leakage, refresh token design, and everything you actually need to know to use JWT in production.
