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Skillbook

Manage AI assistant skills across Claude Code, Cursor, and Windsurf.

AI

Added June 19, 2026 · Last analysed June 19, 2026 · via

StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one for its tech stack and scored it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 19 June 2026; the live site may have changed since.

Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.

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

Launched on Product Hunt on June 19, 2026. The site is hosted on Heroku. We've detected 2 technologies on this site, covering backend framework and hosting. The stack includes Express and Heroku.

It's one of 55 launches on this exact stack.

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

Vibe Score 0 · No 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
Hosting Heroku
Other
Backend framework Express

Infrastructure

Network
AS16509 · US
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
SSL Certificate
Amazon
Valid 1 Jan 2026 to 29 Jan 2027
Certificate as captured in this snapshot, not a live check.

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
skillbook-theme 5 B -

Readiness Breakdown How?

Custom title and meta description
Open Graph tags (title, image, description)
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 79 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
- Canonical URL declared
- Twitter card meta tags

Performance How?

561 ms Server response
26% Faster than peers
1320 ms Largest contentful paint
0.05 Cumulative layout shift
7.1 MB Page weight
7.0 MB Image weight
0 Console errors
0 Failed requests

11 images: 9 oversized, 11 without width/height, 2 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
? 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

0 JS files
0 CSS files
0 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.