Durable context for AI-assisted work
KOS organizes your projects, knowledge, decisions, and workflows into durable context you can use with supported AI tools. You keep the files. Each tool you use reads from the same maintained source.
What KOS is, and what it isn't
- A structured set of Markdown files for projects, knowledge, decisions, and handoffs
- Built on KOS Core, a shared foundation that editions and extensions rely on
- Context you can bring to supported AI tools
- Compatible with Obsidian as an interface for reading and editing
- An operating system for your computer
- A chatbot or an AI model
- A prompt library or a folder template on its own
- An official Obsidian product or partnership
What KOS keeps
Projects
A brief, scope, and current state for each piece of work, so a new session starts from what is true now.
Maintained knowledge
Reference material you curate and keep current, separate from one-off chat output.
Decisions
What was decided, why, and what it replaced. Decisions stay findable after the conversation ends.
Memory and handoffs
Short records of where work stopped and what comes next, written for the next person or session.
Workflows
Repeatable procedures your AI tools can follow against the same files.
Review
Changes an AI proposes are reviewed by you before they become maintained context.
One foundation, several products
KOS Core is the shared technical foundation and compatibility contract. It is not an edition and is not sold separately.
The Starter Kit is the open-source way to start with KOS Community Edition. KOS Pro is the professional commercial edition. Power-Ups are independently versioned extensions with their own compatibility and rights.
Compare editionsSee the workflow end to end
Follow one synthetic project from maintained context to a useful handoff.