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Rac-delta

rac-delta is an universal differential protocol designed to sync and distribute builds (like games, apps or directories) efficiently and storage agnostic.

Developer Tools

Added April 7, 2026 · Last analysed April 10, 2026 · via Hacker News · 73% unique tagline

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Screenshot of Rac-delta

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 April 2026; the live site may have changed since.

Rac-delta is missing several launch fundamentals. Visible gaps: missing several security headers, incomplete legal pages, and no robots.txt or sitemap.

Launched on Hacker News on April 7, 2026. The site is hosted on GitHub Pages and served through Fastly. Our crawler found 5 technologies on this site, covering CDN, hosting, meta-frameworks, and search. The stack includes Docusaurus, Algolia, and Fastly.

It's also one of just 22 launches we've crawled on this exact stack.

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

3.3
StackScope Score
Poor
100/100 Launch Readiness
Launch ready
1/6 Security Headers
Poor
0/3 Legal
Missing
0/2 Crawl files
Missing
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 (5)

Infrastructure
CDN Fastly (2)
Hosting GitHub Pages (2)
Security HSTS (2)
Build & Framework
Meta-framework Docusaurus (2)
Business Tools
Search Algolia

Infrastructure

Network
FASTLY - Fastly, Inc., US
AS54113 · US
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
SSL Certificate
Let's Encrypt
Valid 6 Feb 2026 to 7 May 2026
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.

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)

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
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
Detection works best on English language sites.

Security Headers (1/6)

✗
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)

Performance

175ms response time
Faster than 76% of sites
2 third-party domains loaded

Build

2 JS files
1 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.