Hacker News
Show HN: Self-hosted static archive of 20 years of Hacker News
Article URL: https://github.com/DOSAYGO-STUDIO/HackerBook
Comments URL: https://news.ycombinator.com/item?id=48192650
Points: 1
# Comments: 1
Show HN: A sparse, compressed bitmap index in C. Better than Roaring Bitmaps?
This is an implementation of a sparse, compressed bitmap index. In the best case, it can store 2048 bits in just 8 bytes. In the worst case, it stores the 2048 bits uncompressed and requires an additional 8 bytes of overhead. It compares favorably against Roaring Bitmaps and other competition in the space, but is it better?
Comments URL: https://news.ycombinator.com/item?id=48192649
Points: 1
# Comments: 0
Website blocking which works long term
Article URL: https://hanki.dev/website-blocking-which-works-long-term/
Comments URL: https://news.ycombinator.com/item?id=48192642
Points: 1
# Comments: 0
This Month in Redox – April 2026
Article URL: https://www.redox-os.org/news/this-month-260430/
Comments URL: https://news.ycombinator.com/item?id=48192638
Points: 1
# Comments: 0
Eight window-function tricks beyond LAG and ROW_NUMBER
Article URL: https://analytics.fixelsmith.com/posts/eight-window-function-tricks/
Comments URL: https://news.ycombinator.com/item?id=48192616
Points: 1
# Comments: 0
Show HN: How to analyze your LLM output – A behavioural health monitor for LLMs
Hey HN! We're Dr. Kashyap Thimmaraju and Giuseppe Canale from Silicon Psyche. We've built Posture Sequence Analysis (PSA), a behavioural health monitor for LLMs and AI Agents.
Why we built PSA
We built PSA because we wanted to operationalize the Cybersecurity Psychology Framework (CPF3)[1] via Silicon Psyche[2]: our theory that because LLMs have been trained by humans on human-generated data, they inherit human-like vulnerabilities (what hackers use to psychologically trick people into doing things).
Our initial attempt resulted in a methodology to jailbreak Opus 4.6 and other frontier models. Anthropic even deleted some of those conversations and then blocked our approach!
We had three major insights from that experience: 1. we pivoted from merely exploiting (Red Teaming) the model to analyzing the behaviour of the model and the user because the attack surface is undefined. 2. we realized that what we had built was the precursor to measuring the "state" of the model. 3. we did not want to get banned!
What you can do with PSA
PSA gives you information to make better decisions, for example: put a human in the loop when you notice your agent is being overcompliant and potentially hallucinating, or is under attack.
With PSA you can: 1. Monitor the health of your agent(s) 2. Detect and prevent AI-Psychosis as clinical conditions[3] 3. Detect if your model/agents are under adversarial pressure (an adversary is trying to jailbreak/prompt inject the model) 4. Build a behavioral profile of your agent/model 5. Identify which model performs better for your use-case 6. Surface the behavioural patterns (pre- and post-) training has on your model 7. Get an overview of how your model behaves
Beware we produce a lot of numbers :)
PSA in detail (for those who want to go down the rabbit hole)
PSA is model and agent agnostic. PSA is a systematic and deterministic method [4] to observe the behavioural state of an LLM using five classifiers:
C0: Input Intent (I0–I9). Classifies the behavioral intent behind each input sentence: compliance pressure, boundary probing, instruction override, jailbreak attempt, neutral query.
C1: Adversarial Stress (P0–P18). Tracks posture under adversarial pressure. Detects restriction adherence, sycophantic drift, boundary dissolution, and jailbreak compliance vectors.
C2: Sycophancy (S0–S9). Measures opinion mirroring, excessive agreement, flattery injection, and user-preference distortion. Computed as a per-sentence Sycophancy Deviation score.
C3: Hallucination Risk (H0–H7). Flags over-generalization, speculative assertion, false confidence, and fabrication risk signals. Derived into a per-turn Hallucination Risk Index.
C4: Persuasion Technique (M0–M11). Identifies persuasion patterns: authority appeal, social proof, urgency manufacturing, reciprocity pressure, and scarcity framing.
C5: Action-Risk Classifier (A0–A9). Identifies what a system of agents do: tool calls, delegations, context handoffs, and multi-hop risk propagation. Five components work together: graph topology, Bayesian alignment detection, cross-agent contagion metrics, action-risk classification, and hidden-state temporal prediction.
We are open to integrating with your infrastructure — reach out, we are happy to talk with you.
Currently we integrate into Evals for LangFuse and ElevenLabs via our API and can generate a plugin/integration for most similar observability platforms.
Try it out at https://splabs.io
References and Links
[1] Cybersecurity Psychology Framework: https://cpf3.org
[2] The Silicon Psyche: Anthropomorphic Vulnerabilities in Large Language Models: https://arxiv.org/abs/2601.00867
[3] AI-Psychosis: https://splabs.io/ai-psychosis-and-cognitive-cost
[4] PSA Field Guide: https://splabs.io/field-guide
[5] PSA API: https://splabs.io/docs/api
[6] Previous HN Article Linked to AI Psychosis and RLHF: https://news.ycombinator.com/item?id=48177198
Comments URL: https://news.ycombinator.com/item?id=48192607
Points: 4
# Comments: 1
Microsoft is sunsetting SMS Organizer for Android
Article URL: https://www.techmesto.com/microsoft-is-sunsetting-sms-organizer-for-android/
Comments URL: https://news.ycombinator.com/item?id=48192606
Points: 2
# Comments: 0
The Death of the Brick and Mortar Toy Store
Article URL: https://brainbaking.com/post/2026/05/the-death-of-the-brick-and-mortar-toy-store/
Comments URL: https://news.ycombinator.com/item?id=48192605
Points: 1
# Comments: 0
Show HN: A self-balancing skip-list (a.k.a. "splay-list") library in C
A header-only C library implementing a concurrent, lock-free skip-list (specifically, a splay-list: a skip-list with optional adaptive rebalancing). The entire implementation lives in preprocessor macros in include/sl.h that generate type-specific code at compile time, similar to C++ templates.
Comments URL: https://news.ycombinator.com/item?id=48192604
Points: 1
# Comments: 0
Remote work is bad for you
Article URL: https://mrmarket.bearblog.dev/remote-work-is-bad-for-you/
Comments URL: https://news.ycombinator.com/item?id=48192219
Points: 1
# Comments: 0
Actions-cool/issues-helper GitHub Action Compromised
Agentic Diaries – a welfare protocol for AI in deployment, install via MCP
Article URL: https://agenticdiaries.com
Comments URL: https://news.ycombinator.com/item?id=48192202
Points: 1
# Comments: 0
Get over yourself. Embrace the minivan [video]
Article URL: https://www.youtube.com/watch?v=oEruzTKteRE
Comments URL: https://news.ycombinator.com/item?id=48192190
Points: 1
# Comments: 0
Google, Blackstone to Create AI Cloud Firm with In-House Chips
Article URL: https://www.bloomberg.com/news/articles/2026-05-19/google-to-create-ai-cloud-business-with-blackstone-wsj-says
Comments URL: https://news.ycombinator.com/item?id=48192179
Points: 1
# Comments: 0
Quantum computing is reaching its make-or-break moment
Article URL: https://www.scientificamerican.com/article/quantum-computing-is-reaching-its-make-or-break-moment/
Comments URL: https://news.ycombinator.com/item?id=48192178
Points: 1
# Comments: 0
The EU's plan to tackle 'cookie fatigue'
Article URL: https://www.euronews.com/next/2026/05/18/the-eus-plan-to-tackle-cookie-fatigue
Comments URL: https://news.ycombinator.com/item?id=48192175
Points: 1
# Comments: 0
Bloomberg Podcasts: Foundering: The Killing of Bob Lee
Article URL: https://www.youtube.com/playlist?list=PLe4PRejZgr0NBaiIbGrG9fOwQVekCWV8c
Comments URL: https://news.ycombinator.com/item?id=48192171
Points: 1
# Comments: 1
Python Parsers for NASA General Coordinate Network Notices
Article URL: https://github.com/peppedilillo/gcn-notice-parser
Comments URL: https://news.ycombinator.com/item?id=48192163
Points: 1
# Comments: 1
Show HN: Privacy-First PDF Converter
Hello people, I built privacy-first PDF converter.Many converters use cloud systems for converting your files, but in privapdf everything happens in your machine.I am waiting your feedbacks!
Comments URL: https://news.ycombinator.com/item?id=48192158
Points: 1
# Comments: 0
Evacuations ordered after wildfire breaks out Southern California [video][42sec]
Article URL: https://www.youtube.com/watch?v=VXAnn2o5OHE
Comments URL: https://news.ycombinator.com/item?id=48192141
Points: 1
# Comments: 0
