Help me connect OpenCode to MandAPI. First inspect opencode --version. If it is v1, preserve my existing settings and add a provider with ID mandapi, npm @ai-sdk/openai-compatible and options.baseURL=https://api.mandapi.com/v1. Ask me for the exact MandAPI MODEL_ID if it is missing, and use it consistently in the models map and local mandapi/MODEL_ID reference. Store the key through OpenCode's /connect credential prompt, never in a committed JSON file or chat output. If the installed tool is v2, read its official v2 provider documentation and use that version's schema instead of copying v1 fields. Validate the config, select the model with /models and run one brief read-only README summary when credentials are available. Preserve normal permission checks and report how to restore the previous provider.