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OS91

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Productivity

Added August 10, 2026 · Last analysed August 10, 2026 · via

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 10 August 2026; the live site may have changed since.

OS91 is early-stage. Visible gaps: missing several security headers, incomplete legal pages, and no sitemap.

Launched on Product Hunt on August 10, 2026. The site is served through Cloudflare, with a domain registered in 2024. We've detected 8 technologies on this site, covering ui library, AI builders, CDN, and CSS frameworks. The stack includes Tailwind CSS, Cloudflare, and Google Fonts.

It's on one of the most common stacks we track, shared by 6,831 launches.

If you own this site, refresh the snapshot and see the full fix list any time →

Vibe Score 100 · Strong AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (8)

Infrastructure
CDN Cloudflare
Build & Framework
CSS framework Tailwind CSS
Developer tools Vite
Font Google Fonts
JavaScript library React Router
UI library Lucide Icons
shadcn/ui
AI & Emerging
AI builder Rork (2)

Infrastructure

Network
AS13335 · US
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Google Trust Services
Valid 28 Jun 2026 to 26 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1.6 years
Registered Dec 2024 · GoDaddy.com, LLC

Email Security

SPF Not published. Your domain can be spoofed in phishing emails.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
DMARC Not published. Receivers fall back to permissive defaults.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (1)

Local storage (1)
KeySizeDetected as
cos-theme 4 B -

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description) (partial) missing og:image
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Meta description is 200 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.
- Canonical URL declared
- Twitter card meta tags

Performance How?

194 ms Server response
71% Faster than peers
964 ms Largest contentful paint
0.00 Cumulative layout shift
1.2 MB Page weight
2 Third-party domains
3 Console errors
0 Failed requests

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

Vibe Score Breakdown How?

SignalPoints
AI CSS signals +10
AI palette signals +5
AI writing signals +5
Recognised AI builder signature +100
AI typography signals +15

This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.

AI Stance

No AI stance declared
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml
security.txt
llms.txt
ads.txt
humans.txt
? Privacy Policy not detected
? Terms of Service not detected
Detection works best on English language sites.

Security Headers (0/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

1 JS files
2 CSS files
2 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.