Error resolving schema reference '$ref' in Canva MCP tool when using custom API provider

[treizelife13]

Description

OpenCode v1.15.10 — Fireworks API provider

Error:
Error resolving schema reference '#/properties/operations/items/anyOf/2/properties/asset_id': AttributeError("'NoneType' object has no attribute 'lookup'")

Repro:

1. Ajouter une clé API Fireworks (provider custom)
2. Configurer le MCP Canva dans opencode.json
3. Lancer opencode avec un modèle Fireworks (e.g. deepseek-v4-flash)
4. L'erreur apparaît à l'initialisation

Cause probable : le schéma de l'outil perform-editing-operations du MCP Canva
contient des $ref auto-référents que le résolveur JSON Schema ne gère pas
avec les providers API custom.

Workaround : désactiver le MCP Canva (enabled: false) quand on utilise
un provider custom.

Plugins

MCP Canva

OpenCode version

Latest

Steps to reproduce

No response

Screenshot and/or share link

No response

Operating System

No response

Terminal

No response

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• MCP tool schema resolution: RecursionError on circular schema references #16899: MCP tool schema resolution: RecursionError on circular schema references — same root cause ($ref resolution failing on self-referential/circular JSON Schema in MCP tool definitions, error at initialization)