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Show HN: Helix – AI-powered API mocking with strict schema enforcement

https://github.com/ashfromsky/helix
4•ashfromsky•1h ago
Helix is a dynamic mock server that generates data on the fly using LLMs (supports Ollama, DeepSeek, Groq).

Key difference from other AI generators: Schema Enforcement. One of the biggest issues with LLMs is non-deterministic output. To solve this, Helix allows you to provide a "System Schema" (using TypeScript interfaces, JSON Schema, or plain text rules). The engine ensures the generated JSON strictly adheres to your defined keys and types, while still generating realistic values for the content.

Features: - Local-First: Works completely offline with Ollama (Llama 3.2 is recommended). - Schema Safety: You can force strict structure compliance so your frontend doesn't break. - Chaos Mode: Optionally simulate latency and error rates. - Stack: Python 3.11, FastAPI, Redis, Docker.

It's open source (AGPLv3). I'd love to hear your feedback, especially regarding the schema validation approach!

Repo: https://github.com/ashfromsky/helix

Show HN: CodexPad – a Notion-style workspace with Vim-native editing

https://codex-pad.vercel.app/
1•Animesh0764•3m ago•0 comments

Deep Generative Models – Stanford CS236 Lecture Notes

https://deepgenerativemodels.github.io/
1•hamburgererror•6m ago•0 comments

Fraud Intelligence for Africa

https://www.protegey.com/
1•Captaindiallo•6m ago•1 comments

PostgreSQL extension for BM25 relevance-ranked full-text search

https://github.com/timescale/pg_textsearch
1•jascha_eng•9m ago•0 comments

Monett: Social Media Made for Humans

https://monnett.social/
1•doener•9m ago•0 comments

Building Blocks for Agents in C++

https://github.com/mozilla-ai/agent.cpp
2•daavoo•9m ago•0 comments

Thoughts on paying down tech debt

https://www.proactiveengineer.com/p/26-when-to-pay-down-tech-debts
2•shehabas•13m ago•0 comments

The Edge-First Manifesto

https://marcobambini.substack.com/p/the-edge-first-manifesto
1•daviducolo•15m ago•0 comments

If You've Never Broken It, You Don't Know It

https://www.oreilly.com/radar/if-youve-never-broken-it-you-dont-really-know-it/
2•ArmageddonIt•19m ago•0 comments

NetBSD/Amiga

https://wiki.netbsd.org/ports/amiga/
1•doener•19m ago•0 comments

The Day Our Own Queries DoS'ed Us: Inside Zalando Search

https://engineering.zalando.com/posts/2025/12/we-hacked-ourselves-so-you-dont-have-to.html
1•shutty•20m ago•0 comments

Evaluating Large Language Models in Scientific Discovery

https://arxiv.org/abs/2512.15567
1•mpweiher•22m ago•0 comments

Amazon will allow ePub and PDF downloads for DRM-free eBooks

https://www.kdpcommunity.com/s/article/New-eBook-Download-Options-for-Readers-Coming-in-2026?lang...
1•captn3m0•23m ago•0 comments

The Fight Inside Amnesty International over Its Hamas Report

https://www.thefp.com/p/the-fight-inside-amnesty-international
2•barry-cotter•23m ago•1 comments

New York's Phone Ban Saved High School

https://nymag.com/intelligencer/article/how-new-york-public-school-phone-ban-saved-high-school.html
1•Anon84•23m ago•0 comments

Show HN: Agents.db – an AGENTS.md alternative for LLM agent context

https://github.com/krazyjakee/AGENTS.db
1•krazyjakee•23m ago•0 comments

Getting Ethereum Ready for GigaGas

https://www.nethermind.io/blog/getting-ethereum-ready-for-gigagas
1•benaadams•24m ago•0 comments

Candleloriam: The Cursed Tree

https://medium.com/luminasticity/candleloriam-18f8043d1c0c
1•bryanrasmussen•25m ago•0 comments

Life, Death and Mowing

https://www.cam.ac.uk/stories/lawnmower-poetry
1•timthorn•28m ago•1 comments

How to bypass YouTube ad-blocking restrictions?

2•thunderarea•31m ago•2 comments

This is the only reason most startups die slowly

1•suhaspatil101•31m ago•0 comments

Go ahead, self-host Postgres

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1•todsacerdoti•32m ago•0 comments

Show HN: I built a self-hosted link shortener with rate limiting

1•Omakidx•35m ago•0 comments

Show HN: I built a self-hosted link shortener with analytics and rate limiting

https://www.link6ync.app/
1•Omakidx•42m ago•1 comments

Hardening Snmalloc

https://github.com/microsoft/snmalloc/tree/release_docs/docs/security
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What 1,200 Production Deployments Reveal About LLMOps in 2025

https://www.zenml.io/blog/what-1200-production-deployments-reveal-about-llmops-in-2025
1•strickvl•49m ago•1 comments

2026 Crypto Exchange Architecture Explained – Get Expert Insights

https://cryptiecraft.com/cryptocurrency-exchange-architecture/
1•RileyQuinn•49m ago•1 comments

Ask HN: What open-source side projects are you working on in 2025?

1•pratik227•52m ago•3 comments

Breaking change on GitHub Actions API without warning

https://github.com/orgs/community/discussions/9752
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The most obsolete infrastructure money could buy – my worst job

https://www.snellman.net/blog/archive/2015-09-01-the-most-obsolete-infrastructure-money-could-buy
2•pavlov•1h ago•0 comments