--- title: "Kerry Kier (@kkier) | Hashnode" description: "Systems engineer working on public safety infrastructure, emergency communications, and where AI actually belongs." url: "https://hashnode.com/@kkier" --- @kkier # Kerry Kier @kkier · Sacramento, USA · Joined April 2026 Systems engineer working on public safety infrastructure, emergency communications, and where AI actually belongs. [Website](https://theknowngood.com/) ### [I Told Codex to Test Everything. It Believed Me.](https://blog.theknowngood.com/codex-security-hardening?utm_source=hashnode&utm_medium=feed) 443 subagents, two perfect 247-case test campaigns, and an Apple entitlement that never came. What I'd scope before the next handoff. 10 min read · [blog.theknowngood.com](https://blog.theknowngood.com/codex-security-hardening?utm_source=hashnode&utm_medium=feed) [7](https://hashnode.com/posts/codex-security-hardening/6ae263a92524d51eeb44811c) [Oct 28](https://hashnode.com/posts/codex-security-hardening/6ae263a92524d51eeb44811c) ### [Stop Saying Vibe Coding Is Easy](https://blog.theknowngood.com/stop-saying-vibe-coding-is-easy?utm_source=hashnode&utm_medium=feed) Field note. This one is commentary, not reference data. It is my own account of building The Known Good, and everything in it is a thing that happened to me. No benchmarks, no citations, no dataset behind it. 11 min read · [blog.theknowngood.com](https://blog.theknowngood.com/stop-saying-vibe-coding-is-easy?utm_source=hashnode&utm_medium=feed) [Aug 26](https://hashnode.com/posts/stop-saying-vibe-coding-is-easy/6a8f321ec560b2313d142e42) ### [New York's 911 Failure Didn't Look Like a Failure. That's the Problem.](https://blog.theknowngood.com/nyc-911-audio-outage?utm_source=hashnode&utm_medium=feed) Seven hours, roughly 1,700 affected calls, and a degraded-service failure that delivery and answer-state metrics can miss. 10 min read · [blog.theknowngood.com](https://blog.theknowngood.com/nyc-911-audio-outage?utm_source=hashnode&utm_medium=feed) [Aug 20](https://hashnode.com/posts/nyc-911-audio-outage/6a8792d6d4b0bb293362065c) ### [What the Teams Vishing Research Looks Like From a 911 Center](https://blog.theknowngood.com/teams-vishing-911-centers?utm_source=hashnode&utm_medium=feed) Two vendor reports describe a social engineering campaign aimed at ordinary enterprise networks. Here is what stood out reading them from a public safety seat. 8 min read · [blog.theknowngood.com](https://blog.theknowngood.com/teams-vishing-911-centers?utm_source=hashnode&utm_medium=feed) [Jul 31](https://hashnode.com/posts/teams-vishing-911-centers/6a6cedbe49c3e40460a4a018) ### [Hugging Face Wasn't the Target. It Was in the Way.](https://blog.theknowngood.com/huggingface-breach-dataset-pipeline?utm_source=hashnode&utm_medium=feed) Removing dataset scripts protected the client. The server kept parsing hostile input. 6 min read · [blog.theknowngood.com](https://blog.theknowngood.com/huggingface-breach-dataset-pipeline?utm_source=hashnode&utm_medium=feed) [Jul 21](https://hashnode.com/posts/huggingface-breach-dataset-pipeline/6a5fe308b8d3f2640b4a7f6d)