15:I[981,["658","static/chunks/658-a698693f56d0116a.js","183","static/chunks/183-6beeeb801c274aaa.js","474","static/chunks/app/%5Btype%5D/layout-631c4730b83c8223.js"],"Posts"] 16:T4d9,Hi HN,

I’m sharing Semantica, an MIT-licensed open-source framework for building semantic layers and knowledge engineering systems for AI.

Many RAG and agent systems fail not due to model quality, but due to the semantic gap — unstructured, inconsistent data without explicit entities, rules, or relationships. Vector-only approaches often hallucinate or fail silently under real-world data.

Semantica focuses on transforming messy data into reasoning-ready semantic knowledge.

Core capabilities: - Universal ingestion (PDF, DOCX, HTML, JSON, CSV, databases, APIs) - Automated entity and relationship extraction - Knowledge graph construction with entity resolution - Automated ontology generation and validation - GraphRAG (hybrid vector + graph retrieval, multi-hop reasoning) - Persistent semantic memory for AI agents - Conflict detection, deduplication, and provenance tracking

Project links: Docs: https://hawksight-ai.github.io/semantica/ GitHub: https://github.com/Hawksight-AI/semantica

I’d appreciate feedback from people working on knowledge graphs, GraphRAG, agent memory, or production RAG reliability.

Happy to discuss design trade-offs or answer technical questions.17:T4fe,I built a CLI tool to catch slow imports and sneaky side effects before they ship to production.

The problem: Python imports can quietly become a performance trap. Your CLI takes 2 seconds to show --help because importing your package pulls in pandas. Or worse, importing a module makes network calls or writes files as a side effect.

Importguard uses Python's -X importtime flag to measure exactly how long each import takes, then lets you:

- Set time budgets: `importguard check mypkg --max-ms 200` - Ban heavy imports: `importguard check mypkg.cli --ban pandas --ban torch` - Get reliable timing: `--r

Show HN: GitHub Action for AI/LLM Security Scanning in CI/CD

Semantica – Open-source semantic layer and GraphRAG framework

The dumbest things that happened in tech this year

RGB Mini-LED will transform the premium TV landscape in 2026

Show HN: Collect and analyze Postmark Time to Inbox data

China accuses Netherlands of making 'mistakes' over chipmaker Nexperia

Carnegie Mellon's Camera Lens Breakthrough Eliminates Background Photo Blur

Show HN: Video to JPG – Extract frames in browser with blur detection

2026 Predictions Scorecard

How does Node.js load its built-in/native modules? (2021)

Show HN: A minimalist, ad-free alternative for receiving SMS online

Dear Apple, Please Fix iOS Music

Get ready for the $5090 5090: GPU prices expected to soar next year

Show HN: Importguard – Measure and enforce Python import-time behavior in CI

The Cost of a Closure in C: The Rest

Freestyle Linked Lists Tricks

Washington Childcare Subsidies Raise Fraud Concerns After Minnesota Probe

HTML Scratchpad

Poor sleep health is associated with older brain age

Building a simple tool to help students explore income options

Taxation in a Strong AI World

'College dropout' has become the most coveted startup founder credential

SIGGRAPH2025 Advances in Real-Time Rendering: IdTech8 Global Illumination [video]

UCLA Distinguished Lecturer Series – Alan C. Kay, Apple Computer, April 1993 [video]

When cheating is harder than practicing

Aura – A Ruby-inspired declarative language for AI/ML pipelines and web apps

Spherical Snake

British ethical hacker granted rare visa after finding 'critical vulnerability

Real-time liquidity and contagion risk monitoring for 24/7 tokenized markets

Generating Human Faces with VAEs

Show HN: The Best Way to use MCPs with coding agents