The personal agent that runs on your rules
$ curl -fsSL https://nu.rebuno.io/install.sh | shOpen source, MIT licensed
Try it, and decide what Nu is allowed to do.
- Press Run to start.
Allowed steps run on their own. The rest wait here for you.
Your rules
- read-inboxRead your email
- everything elseAsks you first
Your rules, enforced by Rebuno
Nu runs on Rebuno, which checks every tool call against your policy and records every step before it runs.
Rules are plain YAML
A rule matches a tool, and optionally its arguments. They live in one file you can read, edit, and keep in Git.
rules: - id: read-calendar when: targets: - calendar__list_events - calendar__get_event then: decision: allow - id: personal-events when: target: calendar__create_event arguments: calendar: { equals: personal } then: decision: allow # Anything no rule covers asks you first.Restarts don't redo work
Every step is logged before it runs, so after a restart Nu picks up where it left off instead of starting over.
- Searched your inboxrecorded
- Read the lease threadrecorded
- Drafted a replyrecorded
- server restarted
- Searched your inboxreplayed
- Read the lease threadreplayed
- Drafted a replyreplayed
- Sent the replyrecorded
Secrets stay out of reach
You send secrets with a command, so they never enter the conversation.
The agent
Asks for keys, and you send them with /secret
The sandbox
Gets only the secrets you share with it
Package tools
Get only the secrets they declare
Every part is yours to change
Packages add tools, skills, and rules, or replace parts of Nu, from the sandbox to chat apps.
Tools
Scripts that declare the secrets they need
Skills
Instructions for specific tasks
Policy
Suggested rules you can accept or skip
Chat apps
Talk to Nu from anywhere
Memory
Store memories where you choose
Sandbox
Run commands somewhere else
Browser
Choose the browser Nu drives
Hooks
React to messages and tool calls
Watchers
Wake Nu on events, like a new email
MCP
Connect any MCP server
Specialists
Focused agents with their own tools and rules
Schedules
Recurring tasks, like a Monday briefing
Install one, or have Nu write it
Install from npm, Git, or a local folder, or ask Nu to write one. Nu shows what it adds and which secrets it needs.
$ nu search calendar$ nu install npm:<package>Installed npm:<package> (namespace calendar).Tools: calendar__list_events.Set its CALENDAR_TOKEN secret with: printf %s '<value>' | nu secret set CALENDAR_TOKEN
tools/list-events/tool.yaml
name: calendar__list_eventsversion: 1description: List your events between two dates.args_schema: type: object required: [from, to] properties: from: { type: string, format: date } to: { type: string, format: date }idempotency: safe_to_retrysecrets: [CALENDAR_TOKEN]entry: index.ts