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France's aircraft carrier located in real time by Le Monde through fitness app

https://www.lemonde.fr/en/international/article/2026/03/20/stravaleaks-france-s-aircraft-carrier-...
203•MrDresden•5h ago•215 comments

VisiCalc Reconstructed

https://zserge.com/posts/visicalc/
97•ingve•3d ago•42 comments

ArXiv declares independence from Cornell

https://www.science.org/content/article/arxiv-pioneering-preprint-server-declares-independence-co...
640•bookstore-romeo•14h ago•217 comments

BYD's bet on EVs is paying off as drivers ditch gas amid rising oil prices

https://electrek.co/2026/03/20/byd-ev-demand-surges-drivers-ditch-gas-amid-rising-oil-prices/
36•ironyman•33m ago•9 comments

Launch HN: Sitefire (YC W26) – Automating actions to improve AI visibility

19•vincko•1h ago•17 comments

The Los Angeles Aqueduct Is Wild

https://practical.engineering/blog/2026/3/17/the-los-angeles-aqueduct-is-wild
173•michaefe•3d ago•97 comments

Parallel Perl – autoparallelizing interpreter with JIT

https://perl.petamem.com/gpw2026/perl-mit-ai-gpw2026.html#/4/1/1
43•bmn__•2d ago•20 comments

Entso-E final report on Iberian 2025 blackout

https://www.entsoe.eu/publications/blackout/28-april-2025-iberian-blackout/
143•Rygian•7h ago•48 comments

Delve – Fake Compliance as a Service

https://deepdelver.substack.com/p/delve-fake-compliance-as-a-service
205•freddykruger•23h ago•80 comments

The Social Smolnet

https://ploum.net/2026-03-20-social-smolnet.html
68•aebtebeten•5h ago•9 comments

Super Micro Shares Plunge 25% After Co-Founder Charged in $2.5B Smuggling Plot

https://www.forbes.com/sites/tylerroush/2026/03/20/super-micro-shares-plunge-25-after-co-founder-...
185•pera•4h ago•91 comments

Show HN: An open-source safety net for home hemodialysis

https://safehemo.com/
5•qweliantanner•3d ago•3 comments

Video Encoding and Decoding with Vulkan Compute Shaders in FFmpeg

https://www.khronos.org/blog/video-encoding-and-decoding-with-vulkan-compute-shaders-in-ffmpeg
112•y1n0•3d ago•45 comments

Flash-KMeans: Fast and Memory-Efficient Exact K-Means

https://arxiv.org/abs/2603.09229
142•matt_d•3d ago•10 comments

90% of crypto's Illinois primary spending failed to achieve its objective

https://www.mollywhite.net/micro/entry/202603172318
58•speckx•2h ago•46 comments

HP trialed mandatory 15-minute support call wait times (2025)

https://arstechnica.com/gadgets/2025/02/misguided-hp-customer-support-approach-included-forced-15...
246•felineflock•5h ago•157 comments

Java is fast, code might not be

https://jvogel.me/posts/2026/java-is-fast-your-code-might-not-be/
118•siegers•5h ago•112 comments

Just Put It on a Map

https://progressandpoverty.substack.com/p/just-put-it-on-a-map
107•surprisetalk•4d ago•51 comments

Too Much Color

https://www.keithcirkel.co.uk/too-much-color/
82•maguay•2d ago•48 comments

Regex Blaster

https://mdp.github.io/regex-blaster/
98•mdp•2d ago•39 comments

Chuck Norris has died

https://variety.com/2026/film/news/chuck-norris-dead-walker-texas-ranger-dies-1236694953/
523•mp3il•4h ago•328 comments

MacBook M5 Pro and Qwen3.5 = Local AI Security System

https://www.sharpai.org/benchmark/
84•aegis_camera•2h ago•97 comments

The Soul of a Pedicab Driver

https://www.sheldonbrown.com/pedicab.html
107•haritha-j•9h ago•30 comments

FSF statement on copyright infringement lawsuit Bartz v. Anthropic

https://www.fsf.org/blogs/licensing/2026-anthropic-settlement
188•m463•3d ago•99 comments

Full Disclosure: A Third (and Fourth) Azure Sign-In Log Bypass Found

https://trustedsec.com/blog/full-disclosure-a-third-and-fourth-azure-sign-in-log-bypass-found
266•nyxgeek•17h ago•80 comments

Drawvg Filter for FFmpeg

https://ayosec.github.io/ffmpeg-drawvg/
155•nolta•3d ago•25 comments

Having Kids (2019)

https://paulgraham.com/kids.html
105•Anon84•3h ago•194 comments

Exploring 8 Shaft Weaving

https://slab.org/2026/03/11/exploring-8-shaft-weaving/
27•surprisetalk•5h ago•2 comments

Oregon school cell phone ban: 'Engaged students, joyful teachers'

https://portlandtribune.com/2026/03/18/oregon-school-cell-phone-ban-engaged-students-joyful-teach...
223•nxobject•3h ago•160 comments

Drugwars for the TI-82/83/83 Calculators (2011)

https://gist.github.com/mattmanning/1002653/b7a1e88479a10eaae3bd5298b8b2c86e16fb4404
249•robotnikman•18h ago•71 comments
Open in hackernews

Launch HN: Sitefire (YC W26) – Automating actions to improve AI visibility

19•vincko•1h ago
Hi HN! We're Vincent and Jochen from sitefire (https://sitefire.ai). Our platform makes it easy for brands to improve their visibility in AI search.

We’ve been working together for years and have backgrounds in RL/optimization at Stanford and software engineering. We came to this idea after speaking with marketing teams who were seeing declining traffic due to Google’s AI Overviews and didn’t know what to do.

This space can feel esoteric. Many case studies, few actual studies. Constant battle against myths (e.g. you need a llms.txt vs. you don't need a llms.txt) and "GEO hacks". We try to be more data-driven. And we try to be more bold and build a system that not only monitors, but actually improves traffic from AI search.

While Google performs a single search, AI search engines expand the user prompt into 3-10 fan-out queries. The sourced pages are ranked using a classified algorithm similar to Reciprocal Rank Fusion (RFF). Finally, the LLMs skim the pages and decide what snippets to cite. Our goal is making sure brands have the right content that makes it through this funnel.

Here is how sitefire works:

- The user defines a set of prompts they want to monitor. These are synthetic prompts - we generate them based on SEO keywords and their monthly search volume.

- We submit these prompts to ChatGPT, Gemini, Google AI Mode, etc. on a daily basis and capture the answers. We extract fan-out queries, sourced pages, citations, and brand mentions.

- For each topic, our agents analyze which web pages are sourced and cited the most, and why. They also consider similar pages that you already have.

- Based on the diagnosis, our content agents draft improvements or create new pages, and push them directly to the client’s CMS.

- We integrate with the client’s network logs and Google Analytics to monitor the increase in AI bot requests and human referrals to their page.

This system is continuously updated, so it always shows which content works, and how to adapt the existing sitemap. For one client that used sitefire to optimize their blog, the AI-optimized articles increased their AI bot requests from ~200/day to ~570/day within ten days.

A risk we recognize is that AI-generated content is filling brands’ websites with slop. Whilst it’s still early days and we don’t claim to have figured everything out yet, our intention is to mitigate this by focusing the content on specific, unique information: real product capabilities, real pricing, honest comparisons. The clients still review every page before it goes live, so they can ensure the content is true to their brand.

Some clients use our platform themselves. For others we act more like an agency, automating steps as we go. The goal is for sitefire to run mostly on its own, with clients approving changes via Slack, Claude or their CMS.

Here's a video demo: https://screen.studio/share/fw7VQQak

If you'd like to try what we've built so far, sign up at https://sitefire.ai.

Comments

yunyu•1h ago
What do you guys do differently than Profound or Airops?
debarshri•1h ago
Add peec to that list.
vincko•1h ago
True, it is very competitive.

Our view on Peec is that it is an analytics solution. They recently did launch an actions feature. But they do not take any actions (yet). Creating content takes a lot of resources. And agencies are expensive.

As an analytics solution it is a good option.

vincko•1h ago
That's a super valid question, we get it a lot. There are a lot of overlaps.

In our view Profound and Airops are aimed at existing marketing teams. Our goal is to be more hands-off, so you don't need a team. With many of our clients we act more like an agency, communicating via Slack and automating step by step. That's the experience we want to create. We aren't there yet though.

Gobhanu•1h ago
how do you track where users are coming from?
vincko•1h ago
We currently simply integrate with your Google Analytics and filter by Source. This tends to be a lower bound, since it's not always set correctly. Coming from some of the native apps, users might be categorized as direct visitors.

There are other data sources we want to enable in the future like Cloudflare.

ceejayoz•1h ago
Ugh. The worst of SEO, but a bunch more of it? Noooooo.
vincko•1h ago
I get it, there is a lot of worry about slop.

We think about it like this: all of these agents will be most useful to users if they provide valuable answers. So they will be looking for valuable content for grounding their answer.

There are exploits, you can overfit on whatever they currently use as an objective function. But those tend to be temporary. So in the long run, valuable content will win. That's what we aim to create. It's a fine line.

ceejayoz•1h ago
> all of these agents will be most useful to users if they provide valuable answers

This is a bald assertion.

vincko•1h ago
Do you doubt the statement on how to maximize usefulness? Or do you mean that the companies behind the models might not optimize (exclusively) for usefulness to the user?

I do share doubts about the latter.

ceejayoz•54m ago
> Do you doubt the statement on how to maximize usefulness?

Yes; the customer here is the site using it, not Google end users, who'll tend to accept whatever's the top search result even if it's deeply wrong or complete slop.

The wellbeing of search users isn't really the priority here, right?

vincko•12m ago
Yes, that is correct. We help the brands, not the end user.

Let me try to rephrase the line of thinking:

To maximize value to the end user, the models generally aim to be helpful. The companies building these models are incentivized to make the model use helpful content.

Our goal is to be aligned with their objective function long term. And that incentivizes us to create helpful content.

Not all of this is a given. We don't know for sure how it will play out. There will always be ways to game the system. But we think those will get fixed over time.

a13n•1h ago
Please don't override the browser's default scroll behavior. It's so jarring and basically never a good idea.
vincko•1h ago
Thank you for the feedback. We'll launch our new site soon where this is fixed.
onecommit•54m ago
How do models deal with assessing the quality of content and its accuracy/veracity when recommending products currently? What do the providers do to avoid a situation where more content === more traffic? Would love to see links to relevant research on this, if you have them. much success to you, appreciate your ai slop risk awareness.
vincko•23m ago
There is the preselection, which depends on the fanout queries the model comes up with and the contents performance across those queries on the search index.

After that content is actually assessed by the model. This paper tried different strategies to improve performance for this last step: https://arxiv.org/pdf/2311.09735. Adding statistics, sources, original data are all strategies that we apply.

In classic SEO, creating more and more content leads to "cannibalization". Generally this hurts performance of all overlapping content so much that it is not worth it.

vahar•27m ago
Regarding the topic of ambient agents, what’s the impact of your product? It’s hard for me to imagine the impact but I guess it must be a necessity if we have ambient agents to get discovered at all right? Nice to see a player from Europe on the market too!