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Sinew

Sinew is an open-source agentic IDE that runs on the AI subscription you already pay for (Claude, ChatGPT, Gemini, Kimi, or OpenRouter). The tools and prompts the agent uses are configurable from a Settings panel. Free, MIT, written in Rust.

AI

Added May 20, 2026 · Last analysed May 20, 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 20 May 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.

Sinew looks production-ready overall, with a complete set of security headers, a thorough launch checklist, and clean crawl signals. Main gaps: incomplete legal pages and incomplete email security.

Launched on Product Hunt on May 20, 2026. The site is hosted on Railway and served through Cloudflare, with a domain registered 5 days before launch. We've detected 10 technologies on this site, covering security, CDN, DNS providers, and email forwarding. The stack includes Next.js, React, and Cloudflare.

It's on one of the most common stacks we track, shared by 134 launches and more locked down than the typical Product Hunt launch.

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

7.9
StackScope Score
Good
100/100 Launch Readiness
Launch ready
0/3 Legal
Missing
2/2 Crawl files
Complete
Vibe Score 10 · 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 (10)

Infrastructure
CDN Cloudflare
DNS Namecheap DNS
Hosting Railway
Security Cloudflare Bot Management
HSTS
Email
Email forwarding Namecheap Email Forwarding (2)
Build & Framework
Framework React
Meta-framework Next.js (2)
Video Vimeo (4)
Analytics & Marketing
SEO Google Search Console

Infrastructure

Network
AS400940 · US
DNS
Namecheap 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 15 May 2026 to 13 Aug 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
3 months
Registered May 2026 · NameCheap, Inc.

Email Security

SPF ~all Soft-fail (~all). Common and accepted.
?
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 (2)

Cookies (2)
NameLifetimeDetected as
_cfuvid session Cloudflare
__cf_bm < 1h Cloudflare

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 65 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 241 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.

Vibe Score Breakdown How?

SignalPoints
AI onboarding signals +5
AI writing 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 (1 URLs)
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 (6/6)

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

Performance

216ms response time
Faster than 61% of sites
2 third-party domains loaded

Build

Code splitting
8 JS files
1 CSS files
2 Third-party domains

App Manifest

Sinew — An agentic IDE you can rewrite
display: standalone 1 icon
theme #050507
developer developertools productivity utilities
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.