---
title: "Show HN: Fence – Jiminy Cricket for AI coding agents"
slug: "fence-soll-claude-code-und-codex-vor-gefaehrlichen-shell-befehlen-schuetzen"
date: 2026-07-07
category: community
tags: [anthropic, agents, open-source]
language: en
sources_count: 1
featured: false
publisher: AInauten News
url: https://news.ainauten.com/en/story/fence-soll-claude-code-und-codex-vor-gefaehrlichen-shell-befehlen-schuetzen
---

# Show HN: Fence – Jiminy Cricket for AI coding agents

**Published**: 2026-07-07 | **Category**: community | **Sources**: 1

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## TL;DR

- hoop.

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## Summary

- hoop.dev founder Andrios R. posted Fence on Hacker News, an open-source tool for AI coding agents that came out of an internal 20-percent side-project sprint.
- Fence is meant to stop catastrophic shell commands before Claude Code or Codex can execute them, including rm -rf-style variants aimed at home directories.
- The pitch: Fence is not a simple denylist. It claims to infer command intent. The post does not yet provide evidence on accuracy, false positives, bypass resistance, or real-world incidents.
- The team uses Fence internally for Claude Code and Codex. Cursor support is planned only if adoption and feedback arrive. At launch, the HN thread had 1 point and 0 comments.

---

## Why it matters

hoop.dev founder Andrios R. posted Fence on Hacker News, an open-source tool for AI coding agents that came out of an internal 20-percent side-project sprint.

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## Key Points

- hoop.dev founder Andrios R. posted Fence on Hacker News, an open-source tool for AI coding agents that came out of an internal 20-percent side-project sprint.
- Fence is meant to stop catastrophic shell commands before Claude Code or Codex can execute them, including rm -rf-style variants aimed at home directories.
- The pitch: Fence is not a simple denylist. It claims to infer command intent. The post does not yet provide evidence on accuracy, false positives, bypass resistance, or real-world incidents.
- The team uses Fence internally for Claude Code and Codex. Cursor support is planned only if adoption and feedback arrive. At launch, the HN thread had 1 point and 0 comments.

---

## Nauti's Take

For teams using AI coding agents, this is worth testing as an extra checkpoint, but it is not a security model yet. Run it against your own risky command examples, wrapper scripts, and legitimate deploy flows first. The useful question is whether it catches real mistakes without turning normal engineering work into a stream of false alarms.

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## FAQ

**Q:** What is Show HN about?

**A:** - hoop.

**Q:** Why does it matter?

**A:** hoop.dev founder Andrios R. posted Fence on Hacker News, an open-source tool for AI coding agents that came out of an internal 20-percent side-project sprint.

**Q:** What are the key takeaways?

**A:** hoop.dev founder Andrios R. posted Fence on Hacker News, an open-source tool for AI coding agents that came out of an internal 20-percent side-project sprint.. Fence is meant to stop catastrophic shell commands before Claude Code or Codex can execute them, including rm -rf-style variants aimed at home directories.. The pitch: Fence is not a simple denylist. It claims to infer command intent. The post does not yet provide evidence on accuracy, false positives, bypass resistance, or real-world incidents.

---

## Related Topics

- [anthropic](https://news.ainauten.com/en/tag/anthropic)
- [agents](https://news.ainauten.com/en/tag/agents)
- [open-source](https://news.ainauten.com/en/tag/open-source)

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## Sources

- [Show HN: Fence – Jiminy Cricket for AI coding agents](https://news.ycombinator.com/item?id=48821039) - Hacker News AI

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## About This Article

This article is a synthesis of 1 sources, curated and summarized by AInauten News. We aggregate AI news from trusted sources and provide bilingual (German/English) coverage.

**Publisher**: [AInauten](https://www.ainauten.com) | **Site**: [news.ainauten.com](https://news.ainauten.com)

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*Last Updated: 2026-07-08*