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cloudflare
[bugfix]: `createToolsFromOpenAPISpec` function needs to be updated in order to use it with `ai-sdk@^5`
Hey, I realized a problem while using @cloudflare/ai-utils . I know it's a seperate repo but this repo is more relative to the solution i think.
My example project's package.json (cloned from agents-starter and upgraded to ai-sdk v5 and agents@391 pr. ) :
{
"name": "cloudflare-agent-starter",
"version": "1.0.0",
"description": "",
"type": "module",
"private": true,
"scripts": {
"start": "vite dev",
"deploy": "vite build && wrangler deploy",
"test": "vitest",
"types": "wrangler types",
"format": "prettier --write .",
"check": "prettier . --check && biome lint && tsc"
},
"keywords": [
"cloudflare",
"ai",
"agents"
],
"author": "",
"license": "MIT",
"devDependencies": {
"@biomejs/biome": "^2.1.4",
"@cloudflare/vite-plugin": "1.11.4",
"@cloudflare/vitest-pool-workers": "^0.8.63",
"@cloudflare/workers-types": "^4.20250813.0",
"@tailwindcss/vite": "^4.1.11",
"@types/node": "^24.3.0",
"@types/react": "^19.1.10",
"@types/react-dom": "^19.1.7",
"@vitejs/plugin-react": "^5.0.0",
"prettier": "^3.6.2",
"tailwindcss": "^4.1.11",
"typescript": "^5.9.2",
"vite": "^7.1.2",
"vitest": "3.2.4",
"wrangler": "^4.33.0"
},
"dependencies": {
"@ai-sdk/openai": "^2.0.22",
"@ai-sdk/react": "^2.0.26",
"@ai-sdk/ui-utils": "^1.2.11",
"@cloudflare/ai-utils": "^1.0.1",
"@phosphor-icons/react": "^2.1.10",
"@radix-ui/react-avatar": "^1.1.10",
"@radix-ui/react-dropdown-menu": "^2.1.15",
"@radix-ui/react-slot": "^1.2.3",
"@radix-ui/react-switch": "^1.2.5",
"agents": "https://pkg.pr.new/cloudflare/agents@391",
"ai": "^5.0.26",
"class-variance-authority": "^0.7.1",
"clsx": "^2.1.1",
"marked": "^16.1.2",
"react": "^19.1.1",
"react-dom": "^19.1.1",
"react-markdown": "^10.1.0",
"remark-gfm": "^4.0.1",
"tailwind-merge": "^3.3.1",
"workers-ai-provider": "^0.7.3",
"zod": "^3.25.76"
}
}
Code
async onChatMessage(onFinish: StreamTextOnFinishCallback<any>) {
const stream = createUIMessageStream({
execute: async ({ writer }) => {
const convertedTools = await createToolsFromOpenAPISpec(
"https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml",
{
overrides: [
{
matcher: ({ url }) => url.hostname === "petstore.swagger.io",
values: {
headers: { "Content-Type": "application/json" }
}
}
]
}
).then((tools) => {
const t = tools.map((tool) => {
const inputSchema = tool.parameters;
// const inputSchema = z.object({
// data: z.string()
// });
const toolFunction = tool.function;
delete tool.parameters;
delete tool.function;
return {
inputSchema,
execute: toolFunction,
...tool
};
});
return Object.fromEntries(t.map((tool) => [tool.name, tool]));
});
const result = streamText({
messages: convertToModelMessages(this.messages),
model: openai("gpt-4o"),
tools: {
...convertedTools,
})
},
onFinish: async (args) => {
await onFinish({
finishReason: args.finishReason,
content: args.content,
text: args.text,
reasoning: args.reasoning,
reasoningText: args.reasoningText,
steps: args.steps,
totalUsage: args.totalUsage,
toolCalls: args.toolCalls,
dynamicToolCalls: args.dynamicToolCalls,
files: args.files,
sources: args.sources,
staticToolCalls: args.staticToolCalls,
usage: args.usage,
dynamicToolResults: args.dynamicToolResults,
staticToolResults: args.staticToolResults,
toolResults: args.toolResults,
warnings: args.warnings,
response: args.response,
providerMetadata: args.providerMetadata,
request: args.request
});
}
});
writer.merge(result.toUIMessageStream());
}
});
return createUIMessageStreamResponse({ stream });
}
if you replace the inputSchema with a zod object while mapping such as z.object({ data: z.string() }) , it will work.
right now, to unblock your work, it can be as simple as const inputSchema = jsonSchema(tool.parameters); this should work