caddy-security is a security application and set of plugins for Caddy v2, a web server, that handles user authentication and controls access to HTTP requests. It supports methods including local, LDAP, OpenID Connect, OAuth 2.0, SAML, JWT, and PASETO, and is used to protect web services behind Caddy.
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 greenpau/caddy-security --skill configuration-registrationsgit clone --depth 1 https://github.com/greenpau/caddy-securityWrote 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/greenpau/caddy-security/configuration-registrations)<a href="https://agentmods.dev/skills/greenpau/caddy-security/configuration-registrations"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-registrations/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/greenpau/caddy-security/configuration-registrations"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-registrations.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 | $0.00030 | $0.01509 |
| Opus 5.5 | $0.00012 | $0.00604 |
| Sonnet 5.5 | $0.00006 | $0.00302 |
| Haiku 4.5 | $0.00003 | $0.00151 |
Grade A, and why
configuration-registrations 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Configuration Registrations
Purpose
Use this skill to configure user signup. Read SQLite enrollment
for user registration sqlite <name>: confirmation creates a login account with
a fixed policy and requires explicit portal selection. The legacy
user registration <name> flow below writes a separate approval dropbox.
OAuth client registrations retain their own configuration owner.
Legacy dispatch starts
in caddyfile_user.go; registration instructions are collected by
caddyfile_user_registration.go. The Caddyfile parser injects
name <block-name> and kind local, then forwards the block instructions to
authcrunch for validation.
Registration flows attach to the target identity store declared by
identity store <name> [<realm>]. During authcrunch validation, portals using
that identity store get registration enabled for that store and the registry is
attached at runtime. Legacy registrations are selected automatically for eligible
portals unless a nonempty explicit enable user registration <name> [<name>...]
selection is supplied. The portal must also enable each selected registry's
identity store. SQLite workflows require explicit registration selection.
Shape
{
security {
user registration signup {
title "User Registration"
code {env.REGISTER_CODE}
dropbox assets/config/registrations_local.json
require accept terms
require domain mx
email provider smtp
admin email [email protected]
identity store localdb
link terms https://example.com/terms
link privacy https://example.com/privacy
allow domain example.com
}
local identity store localdb {
realm local
path assets/config/users.json
}
authentication portal myportal {
enable identity store localdb
}
}
}
Required and Defaulted Fields
Authcrunch requires the effective registry config to have name, kind,
dropbox, email provider, at least one admin email address, and
identity store. In Caddyfile configuration, name comes from the block name
and kind local is injected by caddy-security.
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.
- today First seen · 168 lines · 30 tokens per session scan A 03e1e70bfd19
configuration-registrations is a skill published in the GitHub repository greenpau/caddy-security (2,263 stars, last pushed today), licensed Apache-2.0. It adds 30 tokens to every session and 1,509 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-25.
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