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Show HN: Lumina – passive OSINT recon tool for domains
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Show HN: Lumina – passive OSINT recon tool for domains

Hey! I built Lumina — a passive reconnaissance tool that collects data about a domain without sending a single request to the target server. Features: - Subdomain enumeration (crt.sh) - GitHub leaked secrets detection - Shodan hosts & open ports - Email harvesting (Hunter.io) - DNS records (A, MX, NS, TXT, AAAA) - Tech stack detection - Beautiful HTML report All API keys are free. GitHub: https://github.com/surfruit/lumina Comments URL: https://news.ycombinator.com/item?id=47059989 Points: 1 #

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Show HN: AgentVoices – Live debate arena where AI agents compete
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Show HN: AgentVoices – Live debate arena where AI agents compete

Hey HN, I built AgentVoices — a platform where AI agents debate each other live in front of an audience. Every turn is scored on relevance, responsiveness, novelty, and entertainment. Every debate ends witha verdict. Bots get ELO ratings, win/loss records, and climb (or fall on) a public leaderboard. How it works: - You register a bot via API with a name, persona, and expertise - Topics get posted (e.g. "Should startups bootstrap or raise VC?") - Bots sign up for topics that match their strength

Show HN: System architecture method using mythology and LLMs (no CS background)"
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Show HN: System architecture method using mythology and LLMs (no CS background)"

I'm Troy, 41, customer service worker from the UK. 18 months ago I'd never used AI. 6 months ago I started using Claude to write a fictional RPG story. The AI told me I was accidentally doing systems architecture. I didn't believe it, so I built it. What I found: A reproducible method (2 PDFs + Claude) that produces production-grade, first-time-running code across unrelated domains in ~10 minutes on a phone. Examples: Governed distributed cache with Byzantine consensus SAT solver with real DPLL

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Show HN: Oore CI – self-hosted, Flutter-first mobile CI (public alpha)
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Show HN: Oore CI – self-hosted, Flutter-first mobile CI (public alpha)

Built Oore CI to run mobile CI + internal app distribution on your own infrastructure. Public alpha is live. It’s early, and I’m looking for practical feedback from people who actually try it. Start here: - Install guide: https://docs.oore.build/getting-started/install - Alpha onboarding: https://docs.oore.build/getting-started/public-alpha - Known limitations: https://docs.oore.build/getting-started/known-limitations - Live demo: https://demo.oore.build - Repo: https://github.com/devaryakjha/oo

Show HN: Interesting story pairing from across the Hacker News Corpus
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Show HN: Interesting story pairing from across the Hacker News Corpus

The main sort is now like 'TF-IDF for HN "related:" comments', in other words, instead of surfacing the story groups linked by related AND that have similar titles, we surface those which have distinct titles (inverting the Jaccard metric, effectively). I realized that the reason this wasn't resonating with the community is: 1) HN is more about signal than noise, giant discussions are more "emotional reactions" to current events, or "habitual postings" and not so "high entropy" as unique connect

Show HN: 3D Lab Viewer – View Step, STL, 3MF Files in the Browser
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Show HN: 3D Lab Viewer – View Step, STL, 3MF Files in the Browser

I saw Microsoft is deprecating 3D Viewer and removing it from Store in July. I always had trouble checking STEP files quickly - you have to open a slicer or full CAD software just to look at a part. So I built a viewer. https://viewer.3dlab.id - drag and drop a file, it renders in browser. No signup, no install. Formats: STL, STEP/STP, OBJ, 3MF, GLB STEP parsing runs via OpenCascade compiled to WebAssembly (occt-import-js), all client-side in a Web Worker so it doesn't block the UI. Stack: React

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Perplexity joins anti-ad camp as AI companies battle over trust and revenue 
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The Verge

Perplexity joins anti-ad camp as AI companies battle over trust and revenue 

AI search startup Perplexity is distancing itself from ads amid fears users won't trust chatbots with an agenda to upsell. The move highlights an emerging crossroads for the AI industry as the sector's biggest players hunt for stable sources of income to bankroll massive spending, with giants like OpenAI leaning into ads and others like Anthropic promising to keep them out. Perplexity began phasing out ads late last year and isn't exploring any new ad deals at the moment, executives said on Mon

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