Persistent VM sessions
Grass runs agents on a persistent GrassVM so sessions can keep going even when your laptop sleeps or the app is closed.
Grass
ClaimGrass is an always-on VM for AI coding agents that keeps sessions running after your laptop sleeps or closes. Start tasks anywhere, approve requests on mobile, and return to diffs and results later.
What Grass is
Grass is an always-on VM for AI coding agents. It gives developers a persistent machine so a task can keep running after they close their laptop, leave the app, or lose connection.
The product is aimed at engineers who run agents rather than just write code. Its workflow centers on dispatching work from a phone, receiving permission prompts on mobile, and returning later to diffs and results without babysitting the terminal.
Core features
Remote approvals on mobile
Permission requests are sent to your phone as push notifications, letting you approve or reject work without staying at the terminal.
Mobile diff review
You can review added, modified, deleted, and renamed files from your phone, with repo-organized diffs rather than a terminal-style log.
Agent tool compatibility
The product is described as working with Claude Code and Opencode, so it fits common AI coding-agent workflows.
One place for multiple machines
Grass shows your machines in one place and lets you switch between GrassVM, a Mac, and a server without losing context.
Where Grass fits
Run tasks away from your laptop
Start an agent task from your phone, close the app, and return later when the work has finished on the persistent VM.
Handle approvals remotely
Approve or reject permission requests from a push notification instead of waiting at a desk for the next terminal prompt.
Check diffs from your phone
Review per-line file changes on mobile when an agent has added, modified, deleted, or renamed files during a run.
Avoid interrupted agent runs
Keep long-running sessions alive overnight or through interruptions such as meetings and Wi‑Fi drops.
Move between machines without losing context
Switch between GrassVM, a Mac, and a server in one place when you want to keep context across machines.
Pros and Cons
Pros
- Keeps agent sessions alive after the laptop sleeps or the app closes.
- Moves approval prompts to a phone, which reduces the need to watch the terminal.
- Lets users review file-level diffs on mobile instead of reading a terminal wall of text.
- Supports working from iPhone, with iOS and Android download paths shown on the site.
- Offers a free starting point with 10 hours included and no card required.
Cons
- The source does not document setup steps, team features, or admin controls in detail.
- Supported integrations beyond Claude Code and Opencode are not described on the provided pages.
- Pricing details beyond free-to-start access and 10 included hours are not shown in the source text.
FAQ
What is Grass?
Grass is presented as a persistent, always-on VM for running AI coding agents so work can continue after you close your laptop or leave the app.
Which agent tools does Grass support?
The source says Grass works with Claude Code and Opencode.
Is there a free way to try Grass?
The pricing page says Grass is free to start and includes 10 hours on us with no card needed.
How do approvals work when you are away from your desk?
Permission requests are surfaced as push notifications on your phone so you can approve or reject them remotely.
What platforms is Grass available on?
The source highlights iOS and Android downloads, plus a waitlist flow.
Quick Facts
- Category
- Developer Tool
- Product type
- Always-on VM for AI coding agents
- Primary users
- Engineers running AI coding agents
- Platforms mentioned
- iOS, Android, web
- Supported tools mentioned
- Claude Code, Opencode
- Pricing shape
- Free to start; 10 hours included; no card needed