Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add cass-2003/local-workflow-skill --skill render-domainsgit clone --depth 1 https://github.com/cass-2003/local-workflow-skillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/cass-2003/local-workflow-skill/render-domains)<a href="https://agentmods.dev/skills/cass-2003/local-workflow-skill/render-domains"><img src="https://agentmods.dev/badge/skills/cass-2003/local-workflow-skill/render-domains/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/cass-2003/local-workflow-skill/render-domains"><img src="https://agentmods.dev/badge/skills/cass-2003/local-workflow-skill/render-domains.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00101 | $0.01334 |
| Opus 5 | $0.00051 | $0.00667 |
| Sonnet 5 | $0.00020 | $0.00267 |
| Haiku 4.5 | $0.00010 | $0.00133 |
Grade A, and why
render-domains scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
86% identical to render-domains — 13 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Render Custom Domains
Render automatically provisions and renews TLS certificates (via Let's Encrypt and Google Trust Services) for all custom domains. All HTTP traffic is redirected to HTTPS. Custom domains work on web services and static sites only.
When to Use
- Adding a custom domain to a web service or static site
- Configuring DNS records (CNAME, A, or ALIAS) with a provider
- Setting up a wildcard domain (
*.example.com) - Troubleshooting certificate issuance or domain verification failures
- Choosing between apex (
example.com) and www (www.example.com) - Disabling the
onrender.comsubdomain after adding a custom domain
Domain Limits
| Workspace tier | Custom domain limit |
|---|---|
| Hobby | 2 custom domains (across all services) |
| Professional+ | Unlimited |
Setup Steps
1. Add domain in Dashboard
- Go to your service's Settings > Custom Domains
- Click + Add Custom Domain
- Enter your domain (e.g.
app.example.com) - Click Save
Adding a www subdomain automatically adds the root domain (and vice versa) with a redirect between them.
2. Configure DNS
Add a DNS record with your provider pointing to your Render service:
| Domain type | Record type | Name | Value |
|---|---|---|---|
Subdomain (app.example.com) |
CNAME | app |
<service>.onrender.com |
Apex (example.com) on Cloudflare |
CNAME (flattened) | @ |
<service>.onrender.com |
| Apex on other providers | A | @ |
Use Render-provided IP (see Dashboard) |
Important: Remove any AAAA (IPv6) records for your domain. Render uses IPv4, and stale AAAA records cause unexpected behavior.
Provider-specific guides:
3. Verify domain
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 146 lines · 101 tokens per session scan A f6d638ad9ee2
render-domains is a skill published in the GitHub repository cass-2003/local-workflow-skill (12 stars, last pushed 2mo ago), licensed MIT. It adds 101 tokens to every session and 1,334 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to render-domains, differing in 13 lines, and is treated as a copy.
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