QuantmLayer sandboxes coding agents with a self-learning least-privilege policy
QuantmLayer is an open-source, kernel-level security runtime written in Rust that automatically learns a least-privilege containment policy by observing a coding agent's real behavior, then enforces it to block anything the agent never needed.
Score breakdown
QuantmLayer removes the manual rule-writing bottleneck from agent sandboxing by automatically deriving a least-privilege kernel policy from observed agent behavior, making containment of prompt-injected or compromised coding agents practical without per-agent human configuration.
- 01QuantmLayer is a kernel-level, least-privilege containment runtime for autonomous coding agents, written in Rust and targeting Linux.
- 02It automatically derives a security policy by observing an agent's real behavior via `ql learn --out agent.yaml`, removing the need for humans to write rules manually.
- 03The generated profile is then enforced with `ql run --profile agent.yaml`, blocking anything the agent never needed (e.g., SSH keys, ptrace, network).
QuantmLayer addresses a concrete threat model for autonomous coding agents: because such agents run with the shell's privileges, a compromised or prompt-injected agent could read `~/.ssh/id_rsa`, exfiltrate secrets, exhaust the host, `ptrace` other processes, or hit a cloud-metadata endpoint to steal credentials. The project wraps the agent in a kernel-enforced containment cell defined by a portable, declarative profile, so the agent cannot reach anything it was not explicitly granted.
The distinguishing feature is policy learning rather than static rule authoring.
The distinguishing feature is policy learning rather than static rule authoring. The `ql learn` command observes an agent's real execution and automatically derives a least-privilege YAML profile; `ql run` then enforces that profile on subsequent runs. The repository also references brokered egress, where the agent's only network route is a broker that allows only the domains specified in the profile. The project is written in Rust, targets Linux, is licensed under Apache-2.0, and includes benchmark, demo, and AppArmor packaging directories in its repository structure. The source text is truncated before full details of the brokered-egress feature are described.
Key facts
- 01QuantmLayer is a kernel-level, least-privilege containment runtime for autonomous coding agents, written in Rust and targeting Linux.
- 02It automatically derives a security policy by observing an agent's real behavior via `ql learn --out agent.yaml`, removing the need for humans to write rules manually.
- 03The generated profile is then enforced with `ql run --profile agent.yaml`, blocking anything the agent never needed (e.g., SSH keys, ptrace, network).
- 04The threat model includes SSH-key exfiltration, secret theft, host exhaustion, ptrace of other processes, and cloud-metadata credential theft.
- 05A brokered-egress mode routes the agent's network traffic exclusively through a broker that enforces the profile's allowed domains.
- 06The repository includes a demo that shows the full learn-then-block loop, including blocking an SSH-key theft the agent never performed.
- 07The project is licensed under Apache-2.0 and has a repository structure including benchmark, demo, and AppArmor packaging directories.
Topics
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