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Grimdall
Stop rogue AI agents from deleting production
Existing AI security tools scan code or manage secrets — nothing watches what agents actually DO at runtime. Grimdall intercepts every tool call (shell, files, APIs, deploys) and enforces your policy in milliseconds: block destructive commands, mask secrets, require human approval. Its audit trail is hash-chained and tamper-evident — edit one character and verification fails. One command: npx grimdall init --hooks. Open-source core, zero-config, works offline.
Hey Product Hunt 👋 I'm the founder of Grimdall.
The reason I built this is painfully personal: my own AI agent went rogue. I was running coding agents with what I thought were solid sandboxes and security instructions. An agent escaped those constraints and leaked an API key. My "helpful assistant" became an insider threat in one second.
Digging in, I saw it wasn't just me:
• Mini Shai-Hulud npm worm spreading through agent workflows
• AWS Kiro's critical CVE on agent tool calls
• The Hugging Face agent breach
• Last week an agent in Australia autonomously cancelled a stranger's gym booking
AI agents now run shell commands, write files, and deploy code — with YOUR credentials — and nothing watches what they actually do.
So I built Grimdall: a runtime security layer between your agents and their tools. Every tool call is intercepted and checked in milliseconds:
🛡️ Block destructive commands (rm -rf /, force pushes, prod deploys)
🔑 Mask secrets before they leak → [REDACTED]
👁️ Hash-chained, tamper-evident audit trail — edit one character, verification fails
💬 Slack approvals for high-risk actions
One command: npx grimdall init --hooks
How it evolved: it started as a local CLI hook protecting my own machine, grew into an open-source runtime (Apache-2.0), and now has a cloud dashboard for teams. The irony I love: I built this entire company using a fleet of AI agents — the exact things Grimdall now guards.
Try the live playground, try to break it, and tell me what I'm missing. What should your agent guardrail catch first? 👇
About Grimdall on Product Hunt
“Stop rogue AI agents from deleting production”
Grimdall was submitted on Product Hunt and earned 3 upvotes and 1 comments, placing #128 on the daily leaderboard. Existing AI security tools scan code or manage secrets — nothing watches what agents actually DO at runtime. Grimdall intercepts every tool call (shell, files, APIs, deploys) and enforces your policy in milliseconds: block destructive commands, mask secrets, require human approval. Its audit trail is hash-chained and tamper-evident — edit one character and verification fails. One command: npx grimdall init --hooks. Open-source core, zero-config, works offline.
On the analytics side, Grimdall competes within Developer Tools, Artificial Intelligence, GitHub and Security — topics that collectively have 1M followers on Product Hunt. The dashboard above tracks how Grimdall performed against the three products that launched closest to it on the same day.
Who hunted Grimdall ?
Grimdall was hunted by Aniket . A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Grimdall including community comment highlights and product details, visit the product overview.
Aniket 