Type Alias: KeySchema<TValue, K, TSchema>

KeySchema<TValue, K, TSchema> = object

Defined in: src/Mnemonic/types.ts:432

Schema definition for a single key at a specific version.

Each registered schema binds a storage key + version number to a JSON Schema that validates the payload. Schemas are fully serializable (no functions).

When the provider reads a value whose envelope version matches a registered schema, the payload is validated against the schema's JSON Schema definition.

Example

const userSchemaV1: KeySchema = {
  key: "user",
  version: 1,
  schema: {
    type: "object",
    properties: {
      name: { type: "string" },
    },
    required: ["name"],
  },
};

See

• SchemaRegistry - Where schemas are registered and looked up
• MigrationRule - How values migrate between schema versions
• JsonSchema - The JSON Schema subset used for validation

Type Parameters

Type Parameter	Default type
TValue	unknown
K extends string	string
TSchema extends JsonSchema	JsonSchema

Properties

[keySchemaValueBrand]?

readonly optional [keySchemaValueBrand]: TValue

Defined in: src/Mnemonic/types.ts:460

Phantom type linking this runtime schema to its decoded TypeScript value.

This field is never set at runtime. It exists only so helpers such as defineKeySchema(...), defineMnemonicKey(...), and defineMigration(...) can preserve a single source of truth between schema shape and value type.

---

key

key: K

Defined in: src/Mnemonic/types.ts:436

The unprefixed storage key this schema applies to.

---

schema

schema: TSchema

Defined in: src/Mnemonic/types.ts:451

JSON Schema that validates the payload at this version.

Only the subset of JSON Schema keywords defined in JsonSchema are supported. An empty schema {} accepts any value.

---

version

version: number

Defined in: src/Mnemonic/types.ts:443

The version number for this schema.

Must be a non-negative integer. Any version (including 0) is valid.