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Concepts
ADE (Agentic Development Environment)
An ADE is a workspace built around AI coding agents: you start them, keep their work separate, watch what they do, and review their changes, instead of writing every line yourself.
Agent Harness
An agent harness is the software around an AI model that lets it act: it runs the loop, gives the model tools, manages what it remembers, and decides what needs your approval.
API (Application Programming Interface)
An API is a contract that lets one piece of software request data or trigger actions in another, in a predictable way.
CAC (Customer Acquisition Cost)
CAC is how much you spend, on average, to win one new customer: all sales and marketing costs for a period divided by the new customers gained in that period.
IDE (Integrated Development Environment)
An IDE is the app developers write code in. It combines an editor, a way to run and debug the code, and tools that understand the project, in one window.
LTV (Customer Lifetime Value)
LTV is the total value one customer brings your business over the whole time they buy from you. Compared with CAC, it tells you whether acquiring customers actually pays.
Marketing Attribution
Marketing attribution is the set of rules that decides which ad, email or channel gets credit for a sale. Different tools use different rules, which is why Shopify, Meta and Google rarely agree.
OKR (Objectives and Key Results)
OKRs are a goal-setting method: one Objective says where you want to go, and two to five measurable Key Results say how you'll know you got there.
ROAS vs MER
ROAS is the revenue an ad platform credits to its own ads per dollar spent. MER is your total revenue divided by total marketing spend. ROAS tells you which ads look good; MER tells you whether marketing pays.
Supported PHP versions: security support, end of life and patching
A supported PHP branch can receive fixes; a patched installation has actually received the applicable update.
Website maintenance: who owns PHP, plugins and hosting updates?
Website maintenance needs explicit responsibility for application, runtime and operating-system updates, plus evidence that changes reached production.
What is a CMS? Content management systems explained
A CMS lets people publish and manage content without editing application code for every change.
What is a CVE? A vulnerability identifier, not a risk score
A CVE identifies a publicly disclosed vulnerability so researchers, vendors and operators can refer to the same issue.
What is Magento? Magento Open Source and Adobe Commerce explained
Magento usually refers to a PHP-based ecommerce platform; Magento Open Source and Adobe Commerce are related but distinct products.
What is PHP? The language behind a lot of the web
PHP is a server-side programming language used by WordPress, online stores and custom applications.
What is Ubuntu? The operating system underneath many websites
Ubuntu is a Linux operating system used on servers and desktops; its security updates are separate from application and PHP updates.
What is vibe coding? Fast software, with an ownership question
Vibe coding uses natural-language prompts to build software with AI, often without closely reviewing the generated code.
What is WooCommerce? Ecommerce built on WordPress
WooCommerce adds products, checkout and order management to WordPress, with hosting and maintenance still part of the job.
What is WordPress? A CMS, not your whole website stack
WordPress is an open-source content management system built on PHP, with themes and plugins for extending a website.
WSL (Windows Subsystem for Linux)
WSL lets you run a real Linux system inside Windows, so developers can use Linux tools without a second computer or dual boot.