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v2 backwards compat: specTypeSchema exported - synchronous StandardSchemaV1 (#2047)

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Konstantin Konstantinov 2026-05-15 16:51:48 +03:00 • committed by GitHub
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docs/migration-SKILL.md
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@ -99,7 +99,7 @@ Notes:
| `WebSocketClientTransport` | REMOVED (use `StreamableHTTPClientTransport` or `StdioClientTransport`) |
All other **type** symbols from `@modelcontextprotocol/sdk/types.js` retain their original names. **Zod schemas** (e.g., `CallToolResultSchema`, `ListToolsResultSchema`) are no longer part of the public API — they are internal to the SDK. For runtime validation, use
`isSpecType.TypeName(value)` (e.g., `isSpecType.CallToolResult(v)`) or `specTypeSchemas.TypeName` for the `StandardSchemaV1` validator object. The keys are typed as `SpecTypeName`, a literal union of all spec type names.
`isSpecType.TypeName(value)` (e.g., `isSpecType.CallToolResult(v)`) or `specTypeSchemas.TypeName` for the `StandardSchemaV1Sync` validator object. The keys are typed as `SpecTypeName`, a literal union of all spec type names.
### Error class changes
@ -468,8 +468,8 @@ If a `*Schema` constant was used for **runtime validation** (not just as a `requ
| -------------------------------------------------- | -------------------------------------------------------------------------------------- |
| `CallToolResultSchema.safeParse(value).success` | `isSpecType.CallToolResult(value)` |
| `<TypeName>Schema.safeParse(value).success` | `isSpecType.<TypeName>(value)` |
| `<TypeName>Schema.parse(value)` | `await specTypeSchemas.<TypeName>['~standard'].validate(value)` (returns a `Result`, not the value) |
| Passing `<TypeName>Schema` as a validator argument | `specTypeSchemas.<TypeName>` (a `StandardSchemaV1<In, Out>`) |
| `<TypeName>Schema.parse(value)` | `specTypeSchemas.<TypeName>['~standard'].validate(value)` (returns a `Result` synchronously, not the value) |
| Passing `<TypeName>Schema` as a validator argument | `specTypeSchemas.<TypeName>` (a `StandardSchemaV1Sync<In, Out>`) |
`isCallToolResult(value)` still works, but `isSpecType` covers every spec type by name.