Sixb: a Bun-native framework for operational software shared by people and AI agents

[demattosanthony]

Maintainer disclosure: this is a first-party project post, prepared with AI assistance and reviewed against the implementation.

We have been building Sixb, an MIT-licensed TypeScript framework for operational software on Bun.

Sixb turns data from existing systems into typed objects, relationships, telemetry, and actions. Custom apps, the built-in Atlas UI, workflows, and model-backed agents all use that same model. The aim is a shared operational layer: people can review and intervene, while agents can inspect live data and request only authorized actions.

What is Bun-native about it?

• Bun 1.3+ is the supported runtime and toolchain, not an optional compatibility target.
• One bun run dev starts the Elysia HTTP/WebSocket API, event orchestration, background workers, Atlas, and the custom React app.
• The starter uses SQLite plus local blob and lake storage, so local development needs no external services.
• Production roles can run separately with PostgreSQL, Redis or NATS, BullMQ, S3-compatible storage, DuckLake, and sandbox providers.

The framework model

• Model: declare an ontology of typed objects, properties, links, and telemetry.
• Data: sync connectors into datasets, transform them through pipelines, and project them into operational objects.
• Control: define typed actions, rules, schedules, and workflows with human intervention steps.
• Agents: give model-backed assistants explicitly selected tools, sandboxed Bash, and authorization-scoped access to the same objects and actions.
• Inspection: Atlas shows the ontology, data lineage, objects, action runs, workflow state, and agent threads.

The local start is:

bun create sixb my-app
cd my-app
bun install
bun run dev

That opens the starter app, Atlas, and generated API documentation.

Links

• Repository: https://github.com/sixb-ai/sixb
• Documentation: https://docs.sixb.ai
• Live Northline reference app: https://northline.sixb.ai
• Live Atlas workspace: https://atlas.northline.sixb.ai
• Live API documentation: https://northline.sixb.ai/docs

The project is pre-1.0 and the current packages are at 0.1.1, so feedback on the ontology authoring API, Bun packaging, provider boundaries, and local development experience is especially useful.