← Back to browse

Stefan

Show HN: Making a label printer work under Linux using agentic AI

Visit site · Added June 28, 2026 · Last analysed June 28, 2026 · via Hacker News · 69% unique tagline

Own this Launch?
Screenshot of Stefan

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 28 June 2026; the live site may have changed since.

Stefan is partway there, with clean crawl signals. Main gaps: missing several security headers, incomplete legal pages, and incomplete email security.

Launched on Hacker News on June 28, 2026. The site is hosted on Fastly in the United States, with a domain registered in 1998. The crawl picked up 5 technologies on this site, covering analytics, CDN, hosting, and javascript library. The stack includes Fastly, GitHub Pages, and Matomo.

For context, it's on one of the most common stacks we track, shared by 1,378 launches.

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

4.4
StackScope Score
Fair
78/100 Launch Readiness
Well prepared
0/6 Security Headers
Poor
0/3 Legal
Missing
2/2 Web Standards
Complete
70/100 Performance
Fast
Vibe Score 0 · No AI signals
Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (5)

Infrastructure
CDN Fastly
Hosting GitHub Pages
Build & Framework
JavaScript library Sharer.js
Analytics & Marketing
Analytics Matomo
Umami

Infrastructure

Network
FASTLY - Fastly, Inc., US
AS54113 · US
DNSSEC
Enabled
DNSKEY records published. DNS responses signed.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 5 Jun 2026 to 3 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
28.5 years
Registered Jan 1998 · eNom, LLC

Email Security

⚠
SPF ?all (via apex schueller.net) Neutral (?all). Monitoring only, no enforcement.
✓
DKIM (via apex schueller.net) Detected on apex schueller.net
✗
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
theme 4 B -

Readiness Breakdown How?

⚠
Custom title and meta description (partial) missing meta description
⚠
Open Graph tags (title, image, description) (partial) missing og:description
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
⚠
Page title is 74 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?

187 ms Server response
74% Faster than peers
644 ms Largest contentful paint
0.00 Cumulative layout shift
5.4 MB Page weight
5.2 MB Image weight
4 Third-party domains
0 Console errors
0 Failed requests

⚠ 5 images: 3 oversized, 1 missing alt text

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

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (69 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
Detection works best on English language sites.

Security Headers (0/6)

✗
Referrer-Policy
✗
X-Frame-Options
✗
Permissions-Policy experimental (check browser support)
✗
X-Content-Type-Options
✗
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

✓ Code splitting
8 JS files
3 CSS files
4 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.