Isolated
environments
for AI agents.
A single native binary that provisions bare-metal servers and creates fully isolated development environments.
AI agents need to act
without asking.
They install packages, run builds, execute tests, and modify code autonomously. When you're running multiple projects with agents grinding overnight, you need more than Docker namespaces.
You need full system-level separation where one runaway agent
cannot touch
another project's code, database, or runtime. That's what sing provides.
System containers. Not application containers.
Each project gets a full Linux userspace with its own filesystem, network stack, and systemd — isolated by cgroups and managed by Incus.
System containers with full Linux userspace. Each one looks and feels like a dedicated machine.
Daemonless containers inside each sandbox. No privileged root process. Services invisible across projects.
Hard-capped CPU and memory per project. One agent burning cores doesn't affect the others.
Everything an agent needs.
Nothing it shouldn't have.
Snapshot & Rollback
Every autonomous run begins with a container snapshot. If an agent goes sideways overnight, you don't debug a corrupted environment — you roll back to the exact state before it started. Recovery is always ninety seconds, not ninety minutes.
Guardrails
Wall-clock time limits. Idle detection. Commit frequency monitoring. All enforced from the host, outside the agent's container — outside its reach. If something spirals, the watcher stops the session and rolls back automatically.
Spec-Driven
Work organizes around version-controlled specs with dependency tracking and assignee enforcement. Write the spec during the day. The agent executes it overnight. Review the results in the morning. A repeatable loop.
Context Generation
Generates CLAUDE.md,
AGENTS.md,
SECURITY.md from your
config. Agent-agnostic context files that commit alongside your code and persist
institutional knowledge across sessions.
Multi-Agent
Configure different agents for implementation and review. Claude Code builds, Codex reviews — or the other way around. Reviews trigger automatically when a spec completes. Cross-agent orchestration is built in.
Zero Dependencies
Built with Java 25 and compiled to a native binary with GraalVM.
Sub-millisecond startup. Installed with curl.
No runtime to manage. No containers to run the tool that manages your containers.
Install in one line.
curl -fsSL https://raw.githubusercontent.com/singlr-ai/sing/main/install.sh | bash