Context Architecture System™ is a free, open standard for portable AI context — structured files you own that work with any model, any tool, any time.
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Context Architecture System™ is to Context Arcana™ what WordPress is to Automattic — the open methodology that defines how the implementation practice works. The framework is free to adopt. The documentation is yours to use. Only Context Arcana™ operates under the brand.
Your structured knowledge as the foundation. Everything the system knows lives in files you own, control, and can move anywhere.
The capability layer — models, prompts, agents, workflows. Valuable only when built on a context foundation that outlives any single tool.
The outcome: an AI system that keeps working a year from now. Operational Continuity is the goal the entire framework is designed to deliver.
No vendor owns your context. No platform holds your knowledge hostage. Every file produced under this framework is portable by design.
The methodology outlives any single tool. Swap the model, the host, the workflow engine — the context layer stays intact. This is the design constraint, not a feature.
The framework makes no bets on which model wins. It makes one bet: whoever is using AI in two years will wish they had structured their context from the start.
The complete folder structure, CONTEXT.md template, SETUP_PROMPT.md, secret-scanning git hooks, and a worked example. Clone it, fill it in, activate it with any AI.
Get the Template →cas validate checks your shell against the spec. cas export claude|gpt|gemini|cursor compiles your context into a ready-to-paste prompt for any AI tool. One command to switch models.
Formal specs for the Shell/Body model, manifest schema, required files, and commercial shell format. Export guide and portability guide. All on GitHub under CC BY 4.0.
Packaged expertise as context — AI Marketing Engine, Small Business OS, AI Consultant, and more. Pre-built shell/ layers with methodology, knowledge, and prompts ready to activate.
The CAS Shell Template is free, Apache 2.0 licensed, and the recommended starting point — whether or not you use a commercial shell.
Click "Use this template" on GitHub to create a private copy of the CAS Shell Template. Run the setup script and you have a working shell.
Use the Template →GitHub is how CAS versions and stores your context files — CAS Principle 3. The setup guide covers account creation, cloning the template, and running the install script on Windows or Mac.
Setup Guide →Context Arcana™ is the selective implementation practice that builds the system with you — bespoke partnerships for operators ready to move past experimentation and into durable AI infrastructure.
Visit Context Arcana™ →