# Mindset 4 docs > An agent framework with optimization at its core. Docs, demos, skills and the platform deck for Mindset 4: an agent framework with optimization at its core. Every link below is the markdown mirror of a page on this site; drop the `.md` for the HTML page. ## Guide - [Mindset 4 docs: An agent framework with optimization at its core](https://docs4.mindset.ai/index.md): Docs, demos, skills and the platform deck for Mindset 4: an agent framework with optimization at its core. ## Docs ### Start - [Overview](https://docs4.mindset.ai/docs/overview.md): What Mindset 4 is, who it is for, and how to build on it. ### Build - [Embed an agent](https://docs4.mindset.ai/docs/embed.md): Put an agent in your web app with one script and one tag. ### Connect - [For coding agents](https://docs4.mindset.ai/docs/for-coding-agents.md): llms.txt, Markdown pages, skills and the docs MCP. ## Demos - [Demos](https://docs4.mindset.ai/demos.md): Working Mindset 4 agents you can try, read the source of, and see explained. - [Help widget demo](https://docs4.mindset.ai/demos/widget.md): The classic support bubble, with conversations that pick up where the customer left off. - [Help widget demo: source](https://docs4.mindset.ai/demos/widget/source.md): The source files of the Help widget demo. - [How the Help widget demo works](https://docs4.mindset.ai/demos/widget/how.md): How the Help widget demo is built, step by step. - [Store assistant demo](https://docs4.mindset.ai/demos/store.md): The assistant filters products, points at the right one and adds it to the basket. - [Store assistant demo: source](https://docs4.mindset.ai/demos/store/source.md): The source files of the Store assistant demo. - [How the Store assistant demo works](https://docs4.mindset.ai/demos/store/how.md): How the Store assistant demo is built, step by step. ## Skills - [Skills](https://docs4.mindset.ai/skills.md): Build a SKILL.md that teaches your coding agent to work with Mindset 4, or install a published one. - [Embed an agent skill](https://docs4.mindset.ai/skills/mindset-embed.md): Session handshake, the element and page tools, for any web stack. ## Deck ### Mindset 4 platform - [An agent framework with optimization at its core · Mindset 4 platform](https://docs4.mindset.ai/deck/platform/title.md): Build agents in configuration. Then measure, test and improve them on cost, outcome and security. - [Stop paying a language model to do sorting · Mindset 4 platform](https://docs4.mindset.ai/deck/platform/cost.md): - classify_ticket as an LLM step: $412 a month - The same step as a pure function: $38 a month - [Where does it run? · Mindset 4 platform](https://docs4.mindset.ai/deck/platform/objection-hosting.md): On our cloud, or in yours. The same release runs in both. ## Legacy - [Mindset v3 documentation](https://docs4.mindset.ai/v3.md): Mindset v3 documentation (legacy, no longer sold): every v3 page, each with its own .md mirror - [MOS Handbook](https://docs4.mindset.ai/mos/README.md): Mindset Operating System: the company handbook ## Optional - [Full text](https://docs4.mindset.ai/llms-full.txt): every page above in one file