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Show HN: Built a local guardrail layer for Claude Code

https://github.com/ioni-dev/mati
1•fennect•1h ago
I built Mati to give me more control over what Claude Code and Codex are allowed to do. Many important product constraints live in an engineer's or product person's head.

This isn't new for engineers. We've always had important constraints that only certain people know about, but with coding agents it gets worse because we can now delegate a lot more, sometimes without realizing how much context the agent is missing.

Then we delegate changes and the agent implements a change that looks reasonable but breaks some hidden constraint, hurts performance, exposes data, or does something destructive. It’s a local, Apache-2.0 licensed tool. It works with Claude Code and Codex, and also exposes MCP and CLI interfaces.

The name comes from a Nahuatl verb meaning “to know” or “to think.”

It’s probably a bit over-engineered.

Anyway, sharing it here in case it’s useful to someone.

One engineer shipped 2k PRs a month to production. Verification is the key

https://thenewstack.io/agentic-verification-distributed-systems/
1•geoffbp•1m ago•0 comments

A Hurricane of Pseudoscience

https://fasterik.substack.com/p/a-hurricane-of-pseudoscience
1•fasterik•3m ago•0 comments

Ilha Da Queimada Grande

https://en.wikipedia.org/wiki/Ilha_da_Queimada_Grande
1•thunderbong•3m ago•0 comments

Google will no longer satisfy Zero Data Retention through OpenRouter routing

https://www.reddit.com/r/openrouter/comments/1wkriut/google_gemini_models_no_longer_available_for...
1•theanonymousone•5m ago•0 comments

Zenodo performance: an update on the current situation

https://blog.zenodo.org/2026/09/15/2026-09-15-stability-and-performance-updates/
1•jszymborski•5m ago•0 comments

Argentic – Stateless L402 proxy gate for machine data monetization

https://github.com/amarongrantham-dev/README.md
1•Ag0146•7m ago•0 comments

Apple Explains Why the iPhone 18 Pro Has a Variable Aperture

https://petapixel.com/2026/09/19/apple-explains-why-the-iphone-18-pro-has-a-variable-aperture/
1•throw0101a•7m ago•0 comments

Key symbols we lost to time, pt. 2: The Mac side

https://unsung.aresluna.org/key-symbols-we-lost-to-time-pt-2-the-mac-side/
1•zdw•10m ago•0 comments

Computers turn 1's and 0's into Text and Images [video]

https://www.youtube.com/watch?v=h7UWFJDPX8g
1•dadawei•10m ago•0 comments

Pakistan 2076 Security, State and the Future

https://hassanali110.substack.com/p/pakistan-2076-security-state-and
1•securitystrateg•11m ago•0 comments

Paris probes smart glasses use for suspected sexual harassment

https://www.siliconrepublic.com/business/paris-probes-smart-glasses-over-suspected-sexual-harassment
1•eustoria•11m ago•0 comments

Open WebUI: Self-Hosted AI Platform

https://openwebui.com
1•eustoria•12m ago•0 comments

The Effect of CRTs on Pixel Art

https://datagubbe.se/crt/
3•tobr•12m ago•0 comments

Polyscope – Agentic coding environment for Laravel

https://getpolyscope.com/
1•eustoria•13m ago•0 comments

Secure VMs for Kubernetes: Hardening Kata Containers

https://srcreigh.ca/posts/auditable-kata/
1•srcreigh•14m ago•0 comments

Mac Mini Alternatives for Local LLMs: M6, M5 and Strix Halo

https://terminalbytes.com/mac-mini-alternatives-local-llm-2026/
1•walterbell•17m ago•0 comments

Enthusiast replaces ripped-off CPU pin in substrate – chip boots and hits 33% OC

https://www.tomshardware.com/pc-components/cpus/enthusiast-digs-into-cpu-substrate-to-replace-rip...
1•sbulaev•19m ago•0 comments

Ask HN: How do non-resident founders meet others in SF?

2•aperi•21m ago•0 comments

China Stockpiled Oil, and Now It Could Dominate the Energy Landscape

https://www.nytimes.com/2026/09/17/business/energy-environment/china-oil-iran-war.html
1•bookofjoe•22m ago•1 comments

Multi-agent workflows to reproduce error logs and open PRs

https://www.nishantjani.com/blog/error-log-pattern-analysis-is-hard-2/
1•nishantjani10•25m ago•0 comments

The innovators under 35 shaping climate tech

https://www.technologyreview.com/2026/09/17/1144251/innovators-shaping-climate-tech/
2•joozio•25m ago•0 comments

Show HN: Reader – I made a Mac workspace for books, browser tabs, notes, and AI

https://github.com/Marvy101/reader-source
1•marvy101•26m ago•0 comments

Does AI Assistance Enhance or Erode Expertise? Evidence from 3-Month Experiment

https://www.nber.org/papers/w35720
2•m-hodges•29m ago•0 comments

Jev example use cases from community

https://jevable.com/
1•theanonymousone•29m ago•0 comments

Checkout offered by banks and credit unions. Alternative to OneLink

https://www.paze.com/
2•dzonga•33m ago•0 comments

Montessori gave us great start. Still switched to public school for first grade

https://www.businessinsider.com/switched-from-montessori-public-school-decision-2026-9
2•theanonymousone•33m ago•0 comments

The paradox at the heart of AI and science – Terence Tao [video]

https://www.youtube.com/watch?v=svl_1upFpQo
2•lr0•34m ago•0 comments

Lawsuit: Illegal Agreement of Anthropic, OpenAI, SpaceXAI, Google on AI Slowdown

https://www.independent.co.uk/news/lawsuit-anthropic-google-openai-lawyers-b3052942.html
5•mdp2021•35m ago•0 comments

Unblock AI Shield – Non-invasive perimeter hardening with zero-disk RAM retentio

https://unblock-shield.vercel.app/?lang=en
1•tendenciaiatufu•37m ago•0 comments

My company let candidates use AI tools in interviews. Here's what I saw

https://www.reddit.com/r/EngineeringManagers/comments/1urw740/my_company_lets_candidates_use_ai_t...
1•bucket2015•38m ago•0 comments