# SDI-Protocol

> Most AI produces answers that disappear when the session ends.

- **Website:** https://sdi-protocol.org
- **Pricing:** unknown
- **Categories:** Design, AI Agents
- **Tags:** design, ai-agents, writing-content
- **Platforms:** Web
- **Last verified:** 2026-08-26
- **Canonical page:** https://linkrena.com/tools/sdi-protocol

## About

SDI is a reasoning computer. The AI model runs inside it as a component. What the computer produces is reasoning itself, governed as it's made and kept permanently as the system's own state.

SDI defines a computer whose state is reasoning. A language the reasoning is written in, a protocol that governs what becomes state, and a machine that runs both. A system built to the full specification is a Reckoner.

SDI is built on one idea: reasoning is the computing primitive . AI has two traditions. Neural systems, the language models, reason in natural language but keep nothing checkable. Symbolic systems, the databases and ontologies, hold structured relationships but cannot generate. Combined, what they produce is data about reasoning: the model reads from the structure and writes conclusions back to it, while the reasoning itself happened inside the model and is gone.

SDI bridges the two with a grammar. ADS, an algebraic decision syntax, is written in natural language that resolves to symbols: the model reasons in prose, and each step lands on an expression a machine can evaluate. Every act takes the shape of a decision, an intent, a question broken into sub-questions, each weighed against evidence, a judgment composed from what they found, and each sub-question resolves like this:

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