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midday-ai/ai-sdk-tools
Essential utilities for building production-ready AI applications with Vercel AI SDK. State management, debugging, structured streaming, intelligent agents, and caching.
A monorepo of add-ons for the Vercel AI SDK: chat state management, devtools, typed artifact streaming, multi-agent orchestration, caching, and persistent memory. Built by the Midday team from their own production app, so it's solving real problems rather than invented ones. Squarely aimed at Next.js/React developers already bought into the Vercel AI SDK.
The artifacts package is the most interesting piece — streaming structured, typed data from tool calls to React components sidesteps the usual JSON-parsing-in-markdown hack. The store package solving prop-drilling in chat UIs is a genuinely annoying problem with no clean answer in the base SDK. The example app is dense with real use cases (invoices, cash flow, time tracking) rather than a toy chatbot, which makes it much easier to evaluate fitness. Changeset-based versioning with per-package changelogs suggests the maintainers actually care about upgrade paths.
The active-development warning on the README is doing a lot of work — breaking changes between versions on a utility library is a real adoption risk if you're not pinning obsessively. The agents package reinvents multi-agent orchestration that overlaps heavily with what the AI SDK's own tool calling and the OpenAI Agents SDK already provide, without a clear statement of what's different. Memory backends are limited to in-memory, Upstash Redis, and Drizzle — no direct Postgres support despite that being the obvious choice for most self-hosted setups. The whole thing is tightly coupled to the Vercel AI SDK; if Vercel changes the streaming protocol (which they do), every package here breaks simultaneously.