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A working library for people building, buying, and selling AI blocks. Practical writing, no fluff—read what's relevant, skip the rest.

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Everything in the library. More foundations and tutorials are on the way.
Foundations

What is an AI persona?

An AI persona is a voice and a worldview a model adopts — what it is, how it works, how it differs from an assistant or agent, and how personas work on Sigrix.

Sigrix Editorial 5 min read
Foundations

What is an AI Workforce?

An AI Workforce composes whole AI crews and agents into one runnable system that runs a complete function — what it is, how it orchestrates its teams, and how workforces work on Sigrix.

Sigrix Editorial 5 min read
For buyers

What can an AI sales agent actually do?

What AI sales agents reliably deliver today — research, qualification, outreach drafts, CRM upkeep — what they can't, and how to pick one.

Sigrix Editorial 6 min read
For buyers

How much does an AI agent cost? A pricing breakdown

The full cost stack of an AI agent: the one-time listing price, the token running cost, the extras — and how buying compares to building.

Sigrix Editorial 6 min read
Foundations

AI assistant vs AI agent: what's the difference?

An assistant works with you; an agent works for you. A side-by-side on how they differ, when to use each, and how they compose on Sigrix.

Sigrix Editorial 4 min read
Foundations

What is an AI agent?

An AI agent is an AI that completes a task for you autonomously — what it is, how it works, how it differs from an assistant, and how agents work on Sigrix.

Sigrix Editorial 5 min read
Foundations

What is an AI assistant?

An AI assistant is a conversational AI you work with turn by turn — what it is, how it works, how it differs from an agent, and how assistants work on Sigrix.

Sigrix Editorial 5 min read
For sellers

How to price an AI agent

A practical pricing guide for AI agents, prompts, and assistants — what buyers pay for and how to set a price that converts.

Sigrix Editorial 8 min read
Foundations

Where to Learn About AI Agents in 2026

A curated, no-fluff path to learning AI agents in 2026: the concepts to read first, the best free and paid courses, the frameworks to build with, and the cost mistake almost everyone makes.

Sigrix Editorial 7 min read
For sellers

How to earn from your AI expertise

If you can get AI to reliably do a job, that skill has value. The practical way to earn from it — package and sell the prompts, personas, skills, assistants, and agents buyers already want.

Sigrix Editorial 7 min read
For buyers

Is there a marketplace for AI agents?

Yes — and here is how an AI agent marketplace works: what you can buy, how buying an agent works, and why it beats building one from scratch.

Sigrix Editorial 6 min read
For sellers

How to sell AI agents and assistants

How to turn an AI agent or assistant into a premium listing — build something reliable, document the runbook, price for the job done, and publish it where buyers are looking.

Sigrix Editorial 7 min read
For sellers

How to sell AI prompts (and get paid for them)

A step-by-step guide to turning a tested prompt into a listing that sells — what makes a prompt worth paying for, how to price it, and where to list it.

Sigrix Editorial 6 min read
Foundations

How we count tokens

What a token is, how input and output costs add up, and where to read the estimate on any listing before you buy.

Sigrix Editorial 6 min read
Foundations

The 5 AI building blocks of Sigrix

The five building blocks — prompts, personas, skills, assistants, agents — plus the crews and products that compose them. The vocabulary for everything Sigrix sells.

Sigrix Editorial 9 min read

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