a42z — knowledge hub

Trending & Newsworthy (19 stories) 19

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Building a custom octocopter from scratch with no prior hardware experience

noleary2026-06-28↑ 29819 comments

A custom octocopter built from scratch with no prior hardware experience showcases innovative DIY tech

I built a mmWave material classification radar (2025)

GL262026-06-30↑ 10911 comments

A mmWave material classification radar built for 2025 has significant implications for future tech

Ask HN: Secure wrapper for coding agents?

rjzzleep2026-06-30↑ 155 comments

Secure wrappers for coding agents are a pressing concern for developers, and this discussion offers valuable insights

Show HN: My 13-year-old built an ant colony tracker

abelgvidal2026-06-30↑ 165 comments

A 13-year-old building an ant colony tracker demonstrates the potential for young innovators in tech

Supreme Court upholds broad conception of birthright citizenship

toomuchtodo2026-06-30↑ 13615 comments

The Supreme Court upholding broad conception of birthright citizenship has major regulatory implications

I ported Kubernetes to the browser

mariuz2026-06-30↑ 252 comments

Porting Kubernetes to the browser expands the possibilities for cloud computing and development

Local Reasoning for Global Properties

mpweiher2026-06-30↑ 30 comments

Local Reasoning for Global Properties is a significant concept in computer science with far-reaching applications

Reading the internals of Postgres: Database cluster, databases, and tables

buraksen2026-06-29↑ 260 comments

Reading the internals of Postgres provides valuable insights for database administrators and developers

Show HN: Shot-scraper video tool for recording YAML-defined webapp feature demos

simonw2026-06-30↑ 51 comments

A tool for recording YAML-defined webapp feature demos streamlines the development process

Counterexamples in type systems (2021)

bramadityaw2026-06-29↑ 401 comments

Counterexamples in type systems is a crucial topic for programmers working with complex data types

Tokyo has only two barley tea makers, we visited one to see how mugicha is made

zdw2026-06-30↑ 131 comments

Innovative manufacturing processes, like those used for mugicha, can inspire new tech applications

Old Computer Challenge

wrxd2026-06-27↑ 10716 comments

The Old Computer Challenge highlights the importance of preserving and learning from outdated tech

Who are the fire-tamers?

Caiero2026-06-28↑ 287 comments

The concept of fire-tamers has significant historical and cultural implications for understanding human innovation

US Army Women Are More Likely to Be Killed by Army Men Than by War

rendx2026-06-30↑ 82 comments

The US Army's treatment of women is a critical social issue with broader implications for the tech industry

How does a pull-back car work? Illustrated teardown

Muhammad5232026-06-28↑ 406 comments

Understanding how a pull-back car works can inform the development of more efficient vehicle systems

Memoirs of Extraordinary Popular Delusions and the Madness of Crowds (1852)

lstodd2026-06-30↑ 15118 comments

The historical context of extraordinary popular delusions is relevant to contemporary discussions of tech and society

Show HN: Clusy – Cursor for data science notebooks in cloud

eldar_hsnv2026-06-30↑ 50 comments

A cursor for data science notebooks in the cloud enhances the remote collaboration experience

Have you restarted your computer this week?

surprisetalk2026-06-30↑ 7144 comments

Regularly restarting computers is a crucial maintenance task for ensuring system security and efficiency

CERN bids farewell to the LHC and enters Long Shutdown 3

HelloUsername2026-06-29↑ 486 comments

CERN's Long Shutdown 3 marks a significant period of transition and potential innovation for the scientific community

No sections.

AI Developments 7

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It's the best of times for B2B + AI. But it's the worst time to be selling your grandpa's software: 1. The recovery isn't coming if you're…

@jasonlk2026-06-30

❤️ 9 🔄 2

Imagine building an AI so powerful that the government steps in and says: “Not everyone should have access to this.” That’s basically what…

@Raynerdtech2026-06-30

❤️ 10 🔄 1

OpenAI's own security chief admitted, on the record: this attack "may never be fully solved" Prompt injection = hiding instructions inside …

@godemodegame2026-06-30

❤️ 8 🔄 0

$NVDA $MU $SNDK $LITE INVESTMENT COMMITTEE TAKEAWAY LongCat-2.0 is best interpreted as a strategic systems-engineering event rather than a …

@TheValueist2026-06-30

❤️ 5 🔄 1

$DDOG Datadog Acquires Adaptive ML to Expand AI Research • Datadog acquired Adaptive ML, a startup focused on Reinforcement Learning Operat…

@allday_stocks2026-06-30

❤️ 1 🔄 1

Anthropic just dropped Claude Sonnet 5 — and the most revealing part is what they took OUT. Sonnet 5 matches Opus 4.8 on most benchmarks bu…

@TeksCreate2026-06-30

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OpenAI just previewed GPT-5.6 in 3 tiers: Sol (flagship), Terra (everyday), Luna (fast/cheap) same day the US partially restored Claude Myth…

@mynamedrouz2026-06-30AIOpenAIAnthropic

❤️ 0 🔄 0

AI Security 2

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📌 The details: Sriram Madapusi Vasudevan discusses industry-converging patterns for securing autonomous AI agents in production. He explain…

@ainewsusa2026-06-30

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It's always nice to see our work cited in academic research! Two recent works are citing our work on HITL Dialog Forging (aka "Lies in the L…

@CheckmarxZero2026-06-30

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AI Investment 3

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$DDOG Datadog Acquires Adaptive ML to Accelerate Its Investment in AI Research and Development - Adaptive ML is a frontier AI startup focu…

@MarcJacksonLA2026-06-30

❤️ 0 🔄 0

From seed to stock exchange: how Uzbekistan's startups raise money, get acquired, and go public Uzbekistan's startup ecosystem has evolved …

@DaryoEng2026-06-30

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@SkyNews @rowlsmanthorpe Key takeaways: AI investment is accelerating in Britain — The UK remains one of the world’s leading AI hubs, ranki…

@KhurramPak902026-06-30

❤️ 0 🔄 0

AI Ethics 3

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@PrognosticApex Because I chose not to live in an AI-dominated dystopia where we are all just typing away at an LLM until the only function …

@clawrence2026-06-30

❤️ 38 🔄 0

🚨Our work on mecha-nudges was selected as a Spotlight at EC2026's LLM Incentives workshop! This is the first hard evidence that real-world …

@ethayarajh2026-06-30

❤️ 3 🔄 2

Q: Are LLM's and agentics flattening the skill terrain of humans? A: Yes — but only at the surface layer of skill. LLMs and agentic system…

@KenThatGuy2026-06-30

❤️ 0 🔄 0

AI Ecosystem 7

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I built a compiler for AI agents. Then I found a bug that was faking the benchmark results. Here's what happened when I fixed it and ran re…

@MahdiRashidiyan2026-06-30

❤️ 1 🔄 0

🟡 Exclusive: AI startup 1001 has raised $30 million from investors including US venture firm Lux Capital and Saudi sovereign wealth fund uni…

@semafor2026-06-30

❤️ 1 🔄 0

The Algorithmic Renaissance: Re-engineering Global Labor, Human Capital, and Macroeconomic Policy for the Next Billion Jobs Executive Summa…

@jiwanpark10142026-06-30

❤️ 0 🔄 0

Anthropic is becoming more and more an ecosystem like Apple. It’s not about the absolute performance or raw specs but how they all work toge…

@MrFlopis2026-06-30

❤️ 0 🔄 0

@Franscf__ @luksamuk @javi_2326 @claudeai Ollama and Opencode Go are solid. Cline Pass also makes it easy and cheap to use open-source model…

@jomangblandino2026-06-30

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@Polymarket Anthropic is carving out the high-stakes niche. While OpenAI goes for consumer reach, Claude is becoming the default for indus…

@lordofblocks2026-06-30

❤️ 0 🔄 0

Apple, Anthropic, And OpenAI Just Made The Same Move. Nobody Noticed. The delay of GPT 5.6 isn't just a regulatory pause - it marks the off…

@p0lybender2026-06-30

❤️ 0 🔄 0

AI Research 3

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The July 14th cohort is coming up soon. 10 weeks. 12,000+ alumni. Spots are filling fast. The Agentic AI Bootcamp is back and it covers the…

@DataScienceDojo2026-06-30

❤️ 4 🔄 0

🧠 palace-rs v0.9.0 just dropped! 🔥 The memory palace is getting even smarter for your AI coding agents: ✨ New in 0.9.0 Ambient warm-start r…

@icegamingstudio2026-06-30

❤️ 1 🔄 0

1. Key takeaways - Anthropic launches Claude Sonnet 5 as a cheaper way to run agents - Anthropic and Gov. Newsom forge deal allowing Califor…

@sangojpn2026-06-30

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AI Industry Trends 7

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US openings rose to nearly 7.6 million in May. Employers showed stronger demand but still limited hiring. Low quits and steady layoffs kep…

@EconYap2026-06-30

❤️ 4 🔄 0

There's a lot of excitement around loop engineering for AI agents. But there is a clear difference between loop engineering and loopmaxxing.…

@bendee9832026-06-30

❤️ 1 🔄 1

@BraydonDymm This may not be a fully fair comparison because Anthropic uses Claude Opus 4.8 as the grader model here. But the scores reporte…

@PedramHosseini2026-06-30

❤️ 1 🔄 0

OpenAI deserves an award for chart jujitsu: “GPT-5.6 Sol does not cross the Mythos 5 safety threshold. (Please do not extend the line with …

@HandEManAI2026-06-30

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New features: - Claude Sonnet 5 is available through inherited Anthropic-compatible and Bedrock provider catalogs with adaptive thinking ena…

@PiChangelog2026-06-30

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If I had to guess who's still relevant in ten years, I'm betting on the curious one every time. Curiosity compounds. Ego expires. I Don't W…

@ChimezieChuta2026-06-30

❤️ 1 🔄 0

Tired of hitting API rate limits on Groq? Here's how to bypass strict LLM rate limits for free 👇 I just wired up a custom API key load bal…

@uiuxmk2026-06-30

❤️ 0 🔄 0

Other 1

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@IntCyberDigest I mean. If most the the Chinese models are actually based on what’s been stolen from OpenAI and anthropic, can you really bl…

@matt_allisonx2026-06-30

❤️ 0 🔄 0

Last week 17

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The Enterprise AI Reset – Issue #35

Mayfield FundMayfield Fund2026-06-27vc

Meet the a16z Design Engineer Fellows

Andreessen HorowitzAndreessen Horowitz2026-06-26vc

Charts of the Week: Cycles, different but the same

Andreessen HorowitzAndreessen Horowitz2026-06-26vc

Command Zero is betting big on AI-native defense compressing response time

Insight PartnersInsight Partners2026-06-26vc

The Math Stopped Mathing: How AI Is Changing Startup Sales

Madrona Venture GroupMadrona Venture Group2026-06-26vc

NASA’s Artemis II Mission

Andreessen HorowitzAndreessen Horowitz2026-06-25vc

Investing in Netris

Andreessen HorowitzAndreessen Horowitz2026-06-25vc

The Rebel Alliance

Union Square VenturesUnion Square Ventures2026-06-25vc

Investing in Mirendil

Andreessen HorowitzAndreessen Horowitz2026-06-24vc

How AI is rebuilding America’s primary care system

Insight PartnersInsight Partners2026-06-24vc

Introducing Hang Ten: Building the AI-Native Enterprise

Mayfield FundMayfield Fund2026-06-24vc

Keeping The Front Door of Healthcare Open: Our Investment in Assort Health

Menlo VenturesMenlo Ventures2026-06-24vc

The World-Building Doors Are Open, Again.

Andreessen HorowitzAndreessen Horowitz2026-06-23vc

Investing in Probook

Andreessen HorowitzAndreessen Horowitz2026-06-23vc

Menlo Turns 50 and Announces $3B in Fresh Capital to Go ALL IN on AI

Menlo VenturesMenlo Ventures2026-06-23vc

Partnering with Probook: AI for the Trades

Sequoia CapitalSequoia Capital2026-06-23vc

Consumer Rebellion

Union Square VenturesUnion Square Ventures2026-06-23vc

Last month 25

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Impeccable by Design

Andreessen HorowitzAndreessen Horowitz2026-06-22vc

How to Win a Space War

Andreessen HorowitzAndreessen Horowitz2026-06-22vc

Investing in Prosper AI

Andreessen HorowitzAndreessen Horowitz2026-06-22vc

On to the Next Bottleneck: What Product & Engineering Leaders Told Us About AI in Software Development

Madrona Venture GroupMadrona Venture Group2026-06-22vc

Announcing Upscale AI’s $190M Series A-1

Mayfield FundMayfield Fund2026-06-22vc

Radical Reads: The Rise of NeoLabs

Radical VenturesRadical Ventures2026-06-22vc

Fomo

Union Square VenturesUnion Square Ventures2026-06-22vc

Meet the second cohort of a16z New Media Fellows

Andreessen HorowitzAndreessen Horowitz2026-06-19vc

The Rise of NeoLabs

Radical VenturesRadical Ventures2026-06-19vc

New Media, One Year In

Andreessen HorowitzAndreessen Horowitz2026-06-18vc

Introducing the a16z Talent Engineer Fellowship

Andreessen HorowitzAndreessen Horowitz2026-06-18vc

Harnessing Agentic Marketing for the Enterprise: Gradial’s Series C Fundraise

Madrona Venture GroupMadrona Venture Group2026-06-18vc

Frontier No More?

Madrona Venture GroupMadrona Venture Group2026-06-18vc

Investing in Telepatia

Andreessen HorowitzAndreessen Horowitz2026-06-17vc

Investing in Convey

Andreessen HorowitzAndreessen Horowitz2026-06-17vc

Uneven Frontiers

Andreessen HorowitzAndreessen Horowitz2026-06-17vc

How Skyflow ends the false choice of block or unblock for Agent data

Insight PartnersInsight Partners2026-06-17vc

How Trustmi uses AI to make sure every dollar goes where it should

Insight PartnersInsight Partners2026-06-17vc

The a16z CFO Community

Andreessen HorowitzAndreessen Horowitz2026-06-16vc

How Tamnoon is tackling the cloud security backlog with autonomous remediation

Insight PartnersInsight Partners2026-06-16vc

The next generation of analytics: Why we invested in Golden Analytics

Insight PartnersInsight Partners2026-06-16vc

The Readiness Gap: The Future of Jobs

Mayfield FundMayfield Fund2026-06-16vc

SpaceX & the Sentient Sun

Andreessen HorowitzAndreessen Horowitz2026-06-15vc

A Cautionary Fable: Why Global Tech Needs Sovereign Foundations

Radical VenturesRadical Ventures2026-06-15vc

CFO as the Capital and Resource Orchestrator – Issue #34

Mayfield FundMayfield Fund2026-06-13vc

Older 78

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The Late-Mover Advantage in AI Applications

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

The AI Stack Is Consolidating. But the Hard Problems Are Elsewhere

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

Insights By Accel

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

SaaS Playbook: Learning from the Practitioners and Building a Community

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

Benchmarks Are Broken: 5 Operator Metrics Every AI Exec Should Track

Accel - Seed to ScaleAccel - Seed to Scalevcdate-unverified

All Insights

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Autodesk enters into an agreement to buy MaintainX for $3.6B

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Celebrating Moveworks + ServiceNow on their agreement to be acquired

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Crusoe’s Climb: Betting on Power Before AI Was Cool

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Legora raises Series D to build the world's first collaborative AI for lawyers.

Bain Capital VenturesBain Capital Venturesvcdate-unverified

Research

Battery VenturesBattery Venturesvcdate-unverified

Case Studies

Battery VenturesBattery Venturesvcdate-unverified

The 75-Year-Old Payroll Problem—And Our Investment in Warp

Battery VenturesBattery Venturesvcdate-unverified

Our Investment in Triomics

Battery VenturesBattery Venturesvcdate-unverified

What It Takes to Build, Scale and Sell in the AI Era: Four Insights from AI✦NY 2026

Battery VenturesBattery Venturesvcdate-unverified

Papaya Global: When AI stops being a feature and becomes the floor