Lemma

Show HN: Lemma – A declarative language for business rules

Added August 11, 2026 · Last analysed August 11, 2026 · via Hacker News

Own this Launch?

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 11 August 2026; the live site may have changed since.

Lemma covers some of the launch checklist, with fast page loads. Visible gaps: missing Permissions-Policy and Strict-Transport-Security, incomplete legal pages, and no sitemap.

Launched on Hacker News on August 11, 2026. The site is hosted on Fly.io, with a domain registered 10 months before launch. Our crawler found 11 technologies on this site, covering analytics, backend framework, CSS frameworks, and DNS providers. The stack includes Svelte, Tailwind CSS, and Fly.io.

It's also the only launch we've crawled on this exact stack and more locked down than the typical Hacker News launch.

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

4.7

StackScope Score

Fair

61/100 Launch Readiness

Well prepared

4/6 Security Headers

Decent

0/3 Legal

Missing

1/2 Crawl files

Partial

90/100 Performance

Fast

Vibe Score 8 · 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 (11)

Infrastructure

DNS	TransIP DNS
Hosting	Fly.io

Business email	Google Workspace (2)

Build & Framework

CSS framework	Tailwind CSS
Font	Google Fonts
Framework	Svelte
Package CDN	jsDelivr

Analytics & Marketing

Analytics	Google Analytics (4)
SEO	Google Search Console
Tag management	Google Tag Manager (2)

Other

Backend framework	Phoenix medium

Infrastructure

Network

FLY - Fly.io, Inc., US

AS40509 · US

DNS

TransIP DNS

Authoritative nameserver

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 Jul 2026 to 3 Oct 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

10 months

Registered Oct 2025 · Key-Systems, LLC

Email Security

✗

SPF Not published. Your domain can be spoofed in phishing emails.

✓

DKIM Detected via known email provider

✗

DMARC p=none None (p=none). Monitoring only.

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 (4)

Cookies (4)

Name	Lifetime	Detected as
_ga	1y	Google Analytics
_ga_FRR34RR3Q2	1y	Google Analytics
_ga_KPCEGJMHB5	1y	Google Analytics
_lemmabase_key	session	-

Readiness Breakdown How?

⚠

Open Graph tags (title, image, description) (partial) missing og:image, og:description

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Favicon present

✓ Semantic HTML (nav, main, article)

- Custom title and meta description

- Twitter card meta tags

Performance How?

82 ms Server response

94% Faster than peers

572 ms Largest contentful paint

0.06 Cumulative layout shift

1.9 MB Page weight

5 Third-party domains

0 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?

Signal	Points
AI writing signals	+3
AI typography signals	+5

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

Content-Signal

? No directive declared

Link headers

? None advertised

Well-Known Files

✓ robots.txt

✗ sitemap.xml

✗ security.txt

✓ llms.txt

✗ ads.txt

✗ humans.txt

Legal

? Privacy Policy not detected

? Terms of Service not detected

? Consent manager not detected

Analytics set tracking cookies on our visit, with no opt-in step.

Detection works best on English language sites.

Security Headers (4/6)

✓

Referrer-Policy

✓

X-Frame-Options via CSP frame-ancestors

✗

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

4 JS files

2 CSS files

5 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.