# memstead-schema
Schema types for [Memstead](https://github.com/memstead/memstead) — the
schema-agnostic graph engine that gives AI agents a durable, typed memory
stored as plain markdown in git.
> **Stability:** this crate is an internal library of the Memstead engine,
> consumed by the `memstead` / `memstead-mcp` binaries. Its Rust API is
> pre-1.0 and experimental — it changes without deprecation cycles. For a
> stable contract, consume the binaries or the MCP surface instead.
This crate defines what a schema *is*: entity type definitions (sections,
metadata fields, required/optional shape), the controlled relationship
vocabulary, validation rules, and the loading pipeline that resolves a
schema reference (`default@1.0.0`) from workspace-installed files or the
embedded built-ins. Every write the engine accepts is validated against
these types, so a mem never drifts away from its pinned schema.
It is the leaf crate of the Memstead workspace: everything else
(`memstead-base`, `memstead-engine`, `memstead-git-branch`, the CLI and
MCP server) depends on it.
## Use
Most users never depend on this crate directly — install the
[`memstead-cli`](../memstead-cli/) binary or the
[`memstead-mcp`](../memstead-mcp/) server instead.
Depend on `memstead-schema` when you are building your own engine
integration and need to parse, validate, or author schema files
programmatically.
## License
MIT OR Apache-2.0, at your option.