Grith is an AI-agent supervision tool presented by its maintainers, identified in the case as grith-ai, as providing “syscall-level supervision”; its own blog announces that “grith is live.” The blog also reports syscall-level measurements of Claude Code and Codex, indicating a focus on agents’ operating-system activity rather than only their application-level tool calls. The supplied search summary claims seccomp-BPF and ptrace enforcement, but the underlying snippets do not establish those mechanisms or verify that Grith blocks unsafe actions before execution; below-application permission enforcement remains a claim to investigate.
The radar already tracks Grith’s launch in radar:grith-coding-agent-security-proxy; the syscall-level framing adds an enforcement question, but the supplied evidence does not establish a distinct new capability. It bears directly on Scott’s SiloOS containment design and Bubblewrap-isolated Songbird Codex workers as a candidate control to evaluate, with preventive blocking versus mere observation still unverified.
ip:framework.siloosip:concept.trust-hierarchydev:project.silo-osdev:technology.bubblewrapradar:grith-coding-agent-security-proxyradar:aegis-inline-ebpf-agent-containmentradar:concept.agent-sandboxing
queries asked of Scott's wikis
- agent harness OS enforcement versus application permissions
- coding agent sandbox syscall supervision
- agent shell access filesystem network policy
- Claude Code Codex runtime security integration
- preventive agent controls versus monitoring
2026-09-23T17:56:45Z
The latest attachment concerns Stroq’s retrospective inspection of recorded agent sessions, not Grith’s syscall enforcement, and supplies no corroboration of preventive containment. This episode has exhausted its observation ladder without substantive Grith evidence or a concrete pending development; expiration reflects inactivity, not disproof.
2026-09-22T20:23:58Z
evidence attached: hn.story.49806952 — shared external link with case evidence
2026-09-12T05:21:32Z
The new kernel-themed headline supplies thematic context, not technical evidence for Grith’s enforcement; the attachment rationale overstates what the supplied content establishes. Preventive blocking versus observation remains unresolved, with no new basis for changing Scott’s containment choices.
2026-09-12T05:21:24Z
evidence attached: hn.story.49646524 — The article's kernel-level framing materially supports the case that agent control cannot rely solely on application-level tool names or permissions.
2026-09-10T09:24:51Z
Stroq adds a separate agent-firewall discovery lead, not independent corroboration of Grith’s syscall-level enforcement; its title does not establish lower-level preventive control either. Grith remains a containment candidate for evaluation, with blocking versus observation unresolved and no new evidence changing Scott’s implementation choices.
2026-09-10T09:22:38Z
evidence attached: hn.story.49640660 — Stroq is an independent agent-command firewall artifact bearing on lower-level supervision and explainable authorization of agent actions.
2026-09-08T14:37:53Z
No new technical evidence distinguishes syscall-level preventive enforcement from observation; the GitHub echo repeats the Show HN framing rather than independently corroborating it. Grith remains a relevant containment evaluation lead, but this episode adds no established capability beyond the already tracked launch.
2026-09-08T14:35:44Z
grounded: known/medium — The radar already tracks Grith’s launch in radar:grith-coding-agent-security-proxy; the syscall-level framing adds an enforcement question, but the supplied evi
2026-09-08T14:33:30Z
case created — A concrete syscall-supervision artifact is a distinct containment episode with direct relevance to the active agent-security topic.