Harper

The citizen developer era is here, but the real question is whether AI-built apps can actually run inside the enterprise.

Stephen Goldberg explains why Harper’s unified runtime, built-in governance, and deployment flexibility make it the right foundation for what comes next.

https://www.harper.fast/resources/why-harper-is-the-definitive-platform-for-enterprise-citizen-developers

Blog | Why Harper is the Definitive Platform for Enterprise Citizen Developers Harper bridges the gap between business agility and IT security. Utilizing a unified runtime, Harper Fabric guarantees data sovereignty across any environment, from public clouds to air-gapped facilities. Empower users with secure, compliant AI application development and robust governance.

Everyone is building agents on Harper right now.

And the more people build, the more compelling the case gets.

Jeff Darnton’s latest article shows one strategy for turning coding agents into a real development system: dispatched agent teams that plan, build, QA, and review in parallel, with humans still owning direction.

The big unlock: Harper’s unified runtime gives agents fewer systems to understand and more room to build.

Tutorial | Production Quality at Vibe Code Velocity: Dispatched Agent Teams with Harper Harper enables production-grade agentic engineering by collapsing database, cache, runtime, and messaging into one process, reducing agent complexity and review burden. A multi-model dispatch workflow lets specialized agents plan, code, QA, and review in parallel while humans retain control over cri...

We’re going LIVE to build the ultimate river flow forecasting app. We're fusing live USGS stream gauges + snowpack data with an AI agent to predict flows based on historic records. We're also building a personal river log feature! 📝🤖

https://www.youtube.com/watch?v=RLT8w5udT04

New from Harper: rocksdb-js.
→ Full transaction support
→ Lazy range iteration
→ TypeScript API
→ Prebuilt binaries
→ Built-in transaction log

A ground-up open source RocksDB binding for Node.js. Huge thanks to Chris Barber.

Blog | New RocksDB Binding for Node.js rocksdb-js is a modern Node.js binding for RocksDB, offering full transaction support, lazy range queries, and a TypeScript API. Built for performance and scalability, it enables reliable write-heavy workloads, real-time replication, and high-concurrency applications in Harper 5.0 and beyond.

Harper 5.0 is open source.

Because we believe the future of software, especially with AI agents, is a unified runtime, not a fragmented stack.

Fewer layers. Smaller surface area. Better reasoning.

That’s how AI goes from prototype to production.

Full story ↓
https://www.harper.fast/resources/open-sourcing-harper

Blog | Open Sourcing Harper Harper is now open source, with its core platform released under Apache 2.0 and enterprise features source-available. This shift builds trust, enables community contributions, and positions Harper as a unified, transparent platform for developers and AI-driven applications.

Harper 5.0 is live.

Our core runtime is now fully open source (Apache 2.0), with Harper Pro source-available under ELv2. Now with RocksDB + LMDB support.

One platform for database, cache, messaging, and app logic—built for performance and scale.

Read more:

Harper Launches 5.0: Fully Open-Source Runtime for Building and Deploying Cost-Efficient Agents | HackerNoon Harper 5.0 launches with an open-source core, RocksDB support, and a unified runtime for AI agents—cutting latency and simplifying modern app development.

🚀 New podcast episode with Daniel Roe, lead of the Nuxt framework.

We discuss Nuxt 3, 4, the upcoming Nuxt 5, open-source leadership, and what teams should know before upgrading their apps.

If you're building with Vue or Nuxt, this is a must-watch.

🎧 Watch now https://www.harper.fast/resources/maintaining-momentum-versioning-stability-the-road-to-nuxt-5-with-daniel-roe

Podcast | Maintaining Momentum: Versioning, Stability & the Road to Nuxt 5 with Daniel Roe In this podcast episode, Daniel Roe, lead of the Nuxt framework, shares insights on Nuxt 3, 4, and the upcoming Nuxt 5 release. We discuss open-source development, upgrading Nuxt apps, Vue-powered full-stack web apps, version maintenance, and the future of modern web development.

Most AI agents spend more money talking to LLMs than they need to.

The fix isn't a smarter model. It's a smarter runtime.

We built an agent on Harper with semantic caching. Same question twice? Served from the vector index. Zero LLM cost. Sub-50ms. Savings compound over time.

One runtime. One process. One deploy command.

https://dev.to/harperfast/build-a-conversational-ai-agent-on-harper-in-5-minutes-4l4

From pro drummer to open source maintainer.

Trezy shares his path into software engineering, work on PixiJS, thoughts on AT Protocol + Bluesky, and why data sovereignty matters for devs.

Great insights for builders 👇
https://www.harper.fast/resources/inside-pixijs-at-protocol-and-modern-game-development-with-trezy-who

What if the toughest part of agentic engineering wasn’t the model, but deployment?

With Harper’s unified runtime and declarative design, AI goes from idea to live system without the human wiring. The last-mile problem is solved. 👇

The Last Mile Problem in AI Development Was Just Solved A 6-minute read for anyone building the future of AI-native software Every AI lab in the world is racing to build a better model. Smarter reasoning.