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Highflame

Anthropic open-sourced how it contains its coding agents. Here is the three-layer model, a real attack walked end to end, and the governance problem no sandbox solves: you run five agents and own none of them.

United States Estimated origin: United States

Added June 30, 2026 · Last analysed June 30, 2026 · via Hacker News · 44% unique tagline

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

Highflame is largely in shape, with complete legal pages, a thorough launch checklist, and fast page loads. Main gaps: missing several security headers, no sitemap, and incomplete email security.

Launched on Hacker News on June 30, 2026. The site is hosted on Vercel, with a domain registered in 2001. The crawl picked up 8 technologies on this site, covering ai service, DNS providers, business email, and transactional email. The stack includes Cloudflare DNS, Google Search Console, and Google Tag Manager.

For context, it's on one of the most common stacks we track, shared by 2,435 launches.

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

Vibe Score 15 · 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 (8) · Indie stack

Infrastructure
DNS Cloudflare DNS
Hosting Vercel
Security HSTS
Email
Business email Google Workspace (3)
Transactional email Resend (2)
Analytics & Marketing
SEO Google Search Console
Tag management Google Tag Manager (4)
AI & Emerging
AI service OpenAI

Infrastructure

Network
AS16509 · US
DNS
Cloudflare DNS
Authoritative nameserver
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
Let's Encrypt
Valid 18 Jun 2026 to 16 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
24.7 years
Registered Oct 2001 · Cloudflare, Inc.

Email Security

SPF ~all Soft-fail (~all). Common and accepted.
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 (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)
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 104 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
Meta description is 209 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.

Performance How?

66 ms Server response
98% Faster than peers
216 ms Largest contentful paint
0.02 Cumulative layout shift
4.4 MB Page weight
4.1 MB Image weight
2 Third-party domains
0 Console errors
0 Failed requests

13 images: 10 oversized, 8 without width/height, 9 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.

Vibe Score Breakdown How?

SignalPoints
Placeholder branding +10
AI palette 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
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy-policy
Terms of Service
/terms-of-use
90% unique

Security Headers (1/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

2 JS files
3 CSS files
2 Third-party domains

Brand Colours

App Manifest

Highflame
display: standalone 2 icons
theme #FF331C
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.