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Every Monday · One email

An applied measurement
case, every week

Analytics and measurement, developer tools, server-side tracking, AI & LLM integrations: weekly real case analyses.

Recent Emails
  • Turning Typography Rules into Prompts with Vibe Coding
  • Data Loss Analysis After GA4 Consent Mode v2
  • E-commerce Code Review Automation with Gemma 4
  • Shopify Flow: Auto Pricing Strategy on Low Stock
  • Server-side Tracking Setup with Cloudflare Workers
...and more
afaik

SaaS Payments from Turkey: Stripe Alternatives and Real Costs

Stripe and PayPal don't work in Turkey. Real cost breakdown of Paddle, iyzico, Polar.sh and PayTR for selling SaaS, MoR vs local virtual POS tradeoffs and tax advantages.

2/28/2026 Updated
ai

Multi-Layer Defense for LLM Production Systems: From Layer 0 to Human-in-the-Loop

Effective defense against LLM failure modes cannot be single-layered. Mode-by-mode matrix and implementation patterns for prompt, output validation, agent guardrails, observability, and human-in-the-loop layers.

4/20/2026 Updated
ai

LLM Agentic Failure Modes: Task Drift, Reward Hacking, Alignment Faking and More

Eight LLM failure modes that surface only in agent and tool-use systems. Mechanism and defense for task drift, incorrect tool invocation, reward hacking, positional bias, mode collapse, degeneration loops, alignment faking, and version drift.

4/19/2026 Updated
ai

LLM Foundational Failure Modes: Hallucination, Sycophancy, Context Rot, Instruction Attenuation

Four LLM failure modes that emerge even in a single prompt. Mechanism, academic evidence, and defense patterns for hallucination and confabulation, sycophancy, context rot, and instruction attenuation.

4/18/2026 Updated
afaik

ADR vs Spec-Driven Development: Why, What, and Using Both

Architecture Decision Records (ADR) and OpenSpec serve complementary roles: ADR answers 'why' a decision was made, spec defines 'what' gets built. How they work together in AI-assisted development.

1/7/2026 Updated
ai

LLM Behavioral Failure Modes: 12 Failure Patterns and the Defense Map

LLMs forget instructions in long sessions, fabricate information, and agree with you against their own answer. A pillar map of 12 systematic failure modes and the defense layers that address them.

2/1/2026 Updated
afaik

From OpenSpec to Brainstorm + Court: Spec-Driven Workflow with Worktree

Evolution from OpenSpec CLI to a brainstorm + court pipeline, multi-AI evaluation, and parallel spec-driven development with git worktree.

4/19/2026
afaik

Conversion Rate: Correct Calculation, Common Mistakes, and Optimization

Blended conversion rate is misleading. A CR calculated without segmenting by traffic source, device, and funnel stage does not reflect actual performance.

9/14/2025 Updated
afaik

Customer Journey: From Linear Funnel to Circular Model

The traditional funnel does not cover post-purchase behavior. The McKinsey CDJ model, loyalty loop concept, and journey mapping make it possible to map the entire customer experience.

9/14/2025 Updated
afaik

Customer Statuses: How CRM Definitions Impact Attribution and Forecasting

Lead, MQL, SQL, active, churned. When customer status definitions are misconfigured in your CRM, attribution breaks and forecasting misleads. A guide to getting it right.

9/14/2025 Updated
afaik

Why KISS Is More Relevant Than Ever in the Age of AI Agents

According to Gartner, over 40% of agentic AI projects will be canceled. Why? Unnecessary complexity. Kelly Johnson's KISS principle, defined in the 1960s, plays a more critical role in AI agent architecture than in classical software.

7/17/2019 Updated
afaik

Why SoC Is Critical in AI Agent Architecture

Separation of Concerns is not just a software principle but the fundamental design decision that determines whether an AI agent architecture collapses or stands. Context boundaries, defense layers, and protocol separation.

7/22/2019 Updated
afaik

AI Agent Protocol Guide: MCP, A2A, UCP, AP2, A2UI, and AG-UI

Six open protocols shaping the AI agent ecosystem in 2026. What each one does, how they relate to each other, and practical use-case scenarios.

3/13/2026
afaik

AI-Powered Codebase Audit: A Production-Grade Approach for Solo Entrepreneurs

Enterprise-quality codebase audit process using AI tools as a solo entrepreneur. Guardrail-driven AI-assisted coding, 6 audit tracks, and the Augmented CTO model.

3/11/2026
devops

Hetzner + Coolify Hardening Checklist: A Battle-Tested Guide

Security, networking, Docker, and operations best practices learned from deploying 4 projects on Hetzner VPS with Coolify. Every item comes from a real incident.

3/2/2026