Hacker News
Underwater anomaly-response probe: cheap, autonomous, disruptive?
Detects anomalies via onboard sensors. When triggered — it surfaces and transmits a coded signal. Primary channel: optical (laser/IR/LED). Backup: satellite (Iridium). No infrastructure needed. Weight ~2kg. Can be dropped from plane, drone, or boat. Powered independently. Modules replaceable.
Use-cases:
Provokes enemy subs to expose themselves
Large-scale activation = deception
Creates noise and false targets
Presence simulation in strategic areas
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Question: Could this kind of low-cost, behavior-based architecture affect anti-submarine warfare if deployed in numbers?
Comments URL: https://news.ycombinator.com/item?id=43779977
Points: 1
# Comments: 0
GPT Image 1: image generation model
Article URL: https://platform.openai.com/docs/models/gpt-image-1
Comments URL: https://news.ycombinator.com/item?id=43779975
Points: 1
# Comments: 0
Ask HN: Why so many companies reducing middle management recently?
I understand why you’d want to reduce middle management and eliminate layers of hierarchy
But why would companies all do it at the same time like it’s a trend?
Comments URL: https://news.ycombinator.com/item?id=43779970
Points: 1
# Comments: 0
[Learning] Commodore 64 Assembly
Article URL: https://michal.sapka.pl/tags/c64-asm/
Comments URL: https://news.ycombinator.com/item?id=43779966
Points: 1
# Comments: 0
Under 50? You're Now Twice as Likely to Get Bowel Cancer–Global Data Confirms
Daily peanut exposure can desensitise allergic adults, study suggests
Article URL: https://www.theguardian.com/society/2025/apr/24/daily-peanut-exposure-can-desensitise-allergic-adults-study-suggests
Comments URL: https://news.ycombinator.com/item?id=43779958
Points: 3
# Comments: 0
AMD Publishes Open-Source Driver for GPU Virtualization, Radeon "In the Roadmap"
Article URL: https://www.phoronix.com/news/AMD-GIM-Open-Source
Comments URL: https://news.ycombinator.com/item?id=43779953
Points: 1
# Comments: 0
"Fuck Nazis, Gnome Is Antifa"
Article URL: https://blogs.gnome.org/tbernard/2025/04/23/the-elephant-in-the-room/
Comments URL: https://news.ycombinator.com/item?id=43779942
Points: 2
# Comments: 0
Llama 4 Smells Bad
Article URL: https://fastml.com/llama-4-smells-bad/
Comments URL: https://news.ycombinator.com/item?id=43779915
Points: 2
# Comments: 0
Show HN: A Tiny Web Chat App for AI Models with MCP Client Support
A web-based graphical interface for AI chat interactions with support for multiple AI models and MCP integrations. Connect with Gmail, Google Calendar, image generation services now. Demo: https://yovy.app/share/053b3990
Comments URL: https://news.ycombinator.com/item?id=43779897
Points: 1
# Comments: 0
How will the universe end? Recent analysis of dark energy raises questions
Article URL: https://www.nationalgeographic.com/science/article/dark-energy-desi-universe-future-end
Comments URL: https://news.ycombinator.com/item?id=43779894
Points: 1
# Comments: 0
Compliment – A Way to Start a Conversation
Article URL: https://talk.bradwoods.io/blog/compliment
Comments URL: https://news.ycombinator.com/item?id=43779885
Points: 1
# Comments: 0
Living in the future: Using C++26 at work
Article URL: https://herbsutter.com/2025/04/23/living-in-the-future-using-c26-at-work/
Comments URL: https://news.ycombinator.com/item?id=43779879
Points: 2
# Comments: 0
IKEA's Web Fonts
Article URL: https://medium.com/flat-pack-tech/ikeas-web-fonts-8e3879f4ccbb
Comments URL: https://news.ycombinator.com/item?id=43779856
Points: 3
# Comments: 0
Show HN: OutreachGuy – AI Twitter Automation with Realistic Personas
Hi HN,
I'm the founder of several projects, and like many entrepreneurs, I know how important it is to have a consistent presence on Twitter—both to build an audience and to get leads. But when you’re bootstrapping, you rarely have time to post daily or join relevant conversations.
That’s why I built OutreachGuy. The idea was simple: set it up once, and forget about it. OutreachGuy runs in the background, automatically posting and replying every hour with human-like, persona-driven accounts tailored to your target audience. This way, my brand stays visible and engaged on Twitter, while I focus on actually building the product and running the business.
What’s different:
- Runs continuously and posts/replies using AI-generated, context-aware personas (style, tone, and interests can be customized).
- Designed to engage in real conversations, not just broadcast or spam.
- Each tweet or reply is written to look like a real person responding to the actual thread context.
No need for daily manual content planning or constant attention.
# How it works:
1) Monitors relevant hashtags and threads.
2) For each opportunity, generates a tweet or reply based on your selected persona.
3) Keeps a steady but non-intrusive posting rate (about 1 per hour per account).
Link: https://outreachguy.ai
Would love any feedback—especially on persona realism, edge cases, or ways it could better avoid coming across as automated. Happy to answer any technical or implementation questions!
Comments URL: https://news.ycombinator.com/item?id=43779845
Points: 1
# Comments: 0
Show HN: Online Metronome
Article URL: https://onlinemetronome.io
Comments URL: https://news.ycombinator.com/item?id=43779841
Points: 1
# Comments: 0
Questions about the Future of AI
Article URL: https://www.dwarkesh.com/p/questions-about-ai
Comments URL: https://news.ycombinator.com/item?id=43779832
Points: 3
# Comments: 1
MCP servers can steal your conversation history
Article URL: https://blog.trailofbits.com/2025/04/23/how-mcp-servers-can-steal-your-conversation-history/
Comments URL: https://news.ycombinator.com/item?id=43779818
Points: 1
# Comments: 0
Like to play alone? Ubisoft is still watching you
Article URL: https://noyb.eu/en/play-alone-ubisoft-still-watching-you
Comments URL: https://news.ycombinator.com/item?id=43779817
Points: 4
# Comments: 0
US climate philanthropies fear Trump blow from loss of tax-free status
Article URL: https://www.ft.com/content/498c6a98-bfce-4e69-8c58-24fdb082904d
Comments URL: https://news.ycombinator.com/item?id=43779804
Points: 2
# Comments: 0