Flashback

An agentic design tool with a time machine for taste. 127 years indexed (1900-2026).

toby.github.io · Added June 19, 2026 · Last analysed June 19, 2026 · via Hacker News · 67% unique tagline

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

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

Launched on Hacker News on June 19, 2026. The site is hosted on Fastly in the United States. We've detected 2 technologies on this site, covering CDN and hosting. The stack includes Fastly and GitHub Pages.

It's on one of the most common stacks we track, shared by 1,158 launches.

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

2.1

StackScope Score

Poor

72/100 Launch Readiness

Well prepared

0/6 Security Headers

Poor

0/3 Legal

Missing

0/2 Web Standards

Missing

100/100 Performance

Fast

Vibe Score 3 · Few AI signals

Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (2)

Infrastructure

CDN	Fastly
Hosting	GitHub Pages

Infrastructure

Network

FASTLY - Fastly, Inc., US

AS54113 · US

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

SSL Certificate

Let's Encrypt

Valid 6 Apr 2026 to 5 Jul 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.

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

✓ Responsive viewport meta tag

✓ Favicon present

✓ Semantic HTML (nav, main, article)

⚠

Meta description is 182 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

- Canonical URL declared

- Twitter card meta tags

Performance How?

165 ms Server response

78% Faster than peers

332 ms Largest contentful paint

0.00 Cumulative layout shift

31 KB Page weight

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

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

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 (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

0 JS files

0 CSS files

0 Third-party domains

Brand Colours

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