ByAstroHubDownload Saros
New Saros is out for Mac

Native tools for the
parallel-agent era

ByAstroHub is an independent software studio. We build the apps, agent skills and plugins we use to ship real projects with AI coding agents, and share them with you.

Explore the appsExplore agent skills
An independent studio · Your work stays on your computer · Light, fast apps
The apps

One port, many voyages.

Two apps for working with AI coding assistants. Saros keeps watch while they work. Astrolabe brings their work home.

Saros app icon

Saros

Agent watch for the Mac notchA ByAstroHub app
While agents run

See what each coding agent is doing, approve its requests, and keep your usage limits in view, right from your MacBook's notch.

Free · for MacVisit Saros ↗
Astrolabe app icon

Astrolabe

Git client for macOS and WindowsA ByAstroHub app
When agents finish

Everyone helps you launch the ships. Astrolabe brings them home: merge the branches your agents left behind and see who wrote each side.

Beta · for Mac and WindowsVisit Astrolabe ↗
Agent skills

A skill set that works as one.

Each skill covers one step of shipping with coding agents, and hands off to the next. It is the same skill set we use to build Saros and Astrolabe.

  1. Plan
    Spec & backlogProject SetupA classified plan, a risk-ordered backlog with checkable done criteria, and a verifier that fails loudly.
  2. Build & review
    Parallel agentsMulti Agent Story FlowEach story in its own worktree. An exit code decides when it is done, and a second model reviews read-only.Build + reviewDual Session Story FlowOne session builds, a separate one reviews read-only. The verifier, not the agent, says when it is done.
  3. Land & clean up
    Git hygieneMerged Worktree CleanupRemoves a story’s worktree and branch only after its pull request is confirmed merged. Never force-deletes.
Explore the full collectionMore skills plug into the same chain. See every skill on Agensi, and which ones pair best.Open on Agensi ↗

MCP servers and plugins are on the way.

The studio

Focused team. Careful tools.

We build the tools we need on real projects, then share them. Every tool we ship solves a problem we hit ourselves.

Questions, bugs or ideas? Talk to us

  • Private by default

    No sign-up and no setup keys. Your code and your work stay on your computer.

  • Never in the way

    If one of our apps closes, or you step away, your AI assistants keep working.

  • Light and fast

    Small apps that open in a moment and barely touch your battery. Every detail is made with care.

  • Fair pricing

    Free where we can, pay once where we can't. No subscriptions.

Support

Talk to the team.

Send us a message and we reply by email.

We only use your email to reply to you. How we handle your message

Using one of our apps?

Each app has its own help, release notes and feedback on its website.

Saros helpSetup, questions and feedbackAstrolabe helpSetup, questions and feedback

Keep your agents in sight.

Download Saros for free, or follow the Astrolabe beta.

Download SarosFollow Astrolabe