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Sentinel

Sentinel is an open-source AI QA agent that reads your repo, derives the real business flows, and tests them end to end across the frontend and the backend.

Developer Tools

Added July 16, 2026 · Last analysed July 16, 2026 · via Hacker News · 58% unique tagline

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 16 July 2026; the live site may have changed since.

Sentinel is early-stage. Visible gaps: missing several security headers, incomplete legal pages, and no robots.txt.

Launched on Hacker News on July 16, 2026. The site is hosted on Hetzner Online GmbH in Germany, with a domain registered in 2020. We've detected 2 technologies on this site, covering publishing and servers. The stack includes Caddy and SlopIt.

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

Vibe Score 3 · Few 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 (2)

Infrastructure
Server Caddy
Analytics & Marketing
Publishing SlopIt

Infrastructure

Network
AS24940 · DE
DNSSEC
Enabled
DNSKEY records published. DNS responses signed.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 6 Jul 2026 to 4 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
5.9 years
Registered Aug 2020 · NameCheap, Inc.

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 (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description) (partial) missing og:image
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 93 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.

Performance How?

149 ms Server response
82% Faster than peers
356 ms Largest contentful paint
0.03 Cumulative layout shift
962 KB Page weight
820 KB Image weight
1 Third-party domains
0 Console errors
0 Failed requests

6 images: 4 oversized, 6 without width/height

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 writing signals +3

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

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

Well-Known Files

robots.txt
sitemap.xml (4 URLs)
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

0 JS files
1 CSS files
1 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.