@tanstack/ai/dist/esm/activities/chat/middleware/validate.js

Type-safe TypeScript AI SDK for streaming chat, tool calling, agents, structured outputs, and multimodal generation.

function validateCapabilities(middlewares, adapter) {
  const provided = /* @__PURE__ */ new Set();
  for (const mw of middlewares) {
    for (const handle of mw.provides ?? []) provided.add(handle);
  }
  const providedNames = () => {
    const names = [...provided].map((h) => h.capabilityName);
    return names.length ? names.join(", ") : "none";
  };
  for (const handle of adapter.requires ?? []) {
    if (!provided.has(handle)) {
      throw new Error(
        `Adapter "${adapter.name}" requires capability "${handle.capabilityName}". Provided capabilities: ${providedNames()}. Add a middleware that provides "${handle.capabilityName}".`
      );
    }
  }
  for (const mw of middlewares) {
    for (const handle of mw.requires ?? []) {
      if (!provided.has(handle)) {
        throw new Error(
          `Middleware "${mw.name ?? "unnamed"}" requires capability "${handle.capabilityName}". Provided capabilities: ${providedNames()}. Add a middleware that provides "${handle.capabilityName}".`
        );
      }
    }
  }
}
export {
  validateCapabilities
};
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