Tutorials
Practical, opinionated guides built from real client work and shipped products. No filler — just what actually works.
// series
// individual guides
Claude Code: The Complete Mastery Guide (2026)
Master Claude Code CLI — Anthropic's AI coding agent. Setup, MCP servers, custom personas, memory, hooks, team workflows, and real-world benchmarks.
OpenClaw 2026: Self-Hosted AI Gateway Setup from Scratch
Install and harden OpenClaw 2026 — the self-hosted gateway connecting Claude to WhatsApp, Telegram, Discord, and 50+ channels with persistent memory.
How I Built a Context Manager for Multi-Agent LLM Systems
I built a context manager that solved collapse in 30+ turn multi-agent sessions. The 4-tier architecture tested on Claude, GPT-4o, and Gemini 1.5 Pro in 2026.
I Built a Spreadsheet That Emails Me Every Morning — for $47
48% of proposals get no buyer engagement in 2026. I built a 291-formula pipeline tracker — here's the build story.
I Packaged a Local SEO Agency's Workflow Into a Claude OS
How I built the Local SEO Dominance OS: 12 Claude skills, 3 automated workflows, and 6 schema templates that replace $400/month in fragmented tools as of 2026.
The Developer Behind DevDiary
I'm Rachid — solo dev building AI tools, ERPs, and 7 Gumroad products from a Termux phone and Contabo VPS. I've shipped 12 client projects since 2025.
Building AI Agent Systems in 2026: Multi-Agent Orchestration, Memory, and Tool Calling
Build AI agent systems in 2026. Multi-agent orchestration, SQLite vector memory, tool calling, and state management for production agent architectures.
What I Use: Dev Hardware, Software, and Stack in 2026
The exact hardware, languages, and tools that power DevDiary.uk — Termux on Android, Contabo VPS, Node.js/TypeScript, Python, and SQLite — current as of 2026.
Freelance Rate Calculator — Stop Guessing What to Charge
A single-file HTML tool that turns your income goals and work style into hourly rates, day rates, and project quotes. Sliders update live. No signup needed.
SEO Audit Pro — Run a Complete SEO Audit in 15 Minutes
A guided HTML toolkit that walks you through a professional-grade SEO audit across 10 modules with auto-scored reports and priority action items.
I Stopped Prompting Claude and Started Operating It
The shift from chatbot user to agent operator — a Personal Claude OS built from config files, shell hooks, and Markdown.
Claude Code Personal OS: 10-Minute Quick Start Setup
Get a minimal Personal OS running with Claude Code in 10 minutes — CLAUDE.md, MCP servers, and one custom skill.
Welcome to DevDiary
A new developer diary — building authority through real builds, integrations, and insights into AI development and Claude Code.
Replacing NLP Pipelines with LLM Agents: The MIS v2 Architecture
Why I scrapped spaCy and Hugging Face for a Batch-and-Specialize pattern using Gemini's 1M context window — and how the MIS got 40% faster with half the code.
Personal Claude OS: How I Turned ~/.claude/ Into a Portable Productivity System
A complete guide to building your own Claude Code configuration — slash commands, agent personas, SOUL.md philosophy, and lifecycle hooks — as a deployable package.