1823aae891Co-authored-by: Matt <77928207+mattzcarey@users.noreply.github.com> Co-authored-by: Konstantin Konstantinov <KKonstantinov@users.noreply.github.com> Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
1.8 KiB
| @modelcontextprotocol/core-internal | @modelcontextprotocol/client | @modelcontextprotocol/server |
|---|---|---|
| minor | major | major |
SEP-1613 / SEP-2106 (JSON Schema 2020-12 posture): the Node default JSON Schema validator is now Ajv2020 (true draft 2020-12) instead of the draft-07 Ajv class — $defs/prefixItems/unevaluatedProperties/dependentRequired are now enforced where they were previously silently ignored; to opt back, construct the draft-07 instance with the v1 defaults — const ajv = new Ajv({ strict: false, validateFormats: true, validateSchema: false, allErrors: true }); addFormats(ajv); — and pass new AjvJsonSchemaValidator(ajv). Schemas declaring a $schema other than 2020-12 are rejected with a clear error rather than mis-validating. outputSchema may now have a non-object root and CallToolResult.structuredContent is widened to unknown (a deliberate source-level break for typed consumers — see the migration guide for the narrowing pattern). Toward 2025-era clients McpServer wraps a non-object outputSchema (and the matching structuredContent) in a {result: …} envelope so the tool stays callable, with same-document $ref/$dynamicRef pointers rewritten to keep resolving — low-level Server users (those bypassing McpServer and registering a tools/call handler directly) get the same wrap by routing the result through the new Server.projectCallToolResult(result, advertisedOutputSchema). Independently, on every era (the SEP's MUST applies regardless of client version), McpServer auto-appends a TextContent JSON serialisation when a handler returns non-object structuredContent without its own text block. The structuredContent presence check is !== undefined (not falsy) on both sides. Thanks @mattzcarey (#2249).