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-saml-providersgit 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-saml-providers)<a href="https://agentmods.dev/skills/greenpau/caddy-security/configuration-saml-providers"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-saml-providers/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-saml-providers"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-saml-providers.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 | $0.00051 | $0.01796 |
| Opus 5.5 | $0.00020 | $0.00718 |
| Sonnet 5.5 | $0.00010 | $0.00359 |
| Haiku 4.5 | $0.00005 | $0.00180 |
Grade A, and why
configuration-saml-providers 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 — 173 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Configuration SAML Providers
Purpose
Use this skill for saml identity provider <name> blocks that let users log
in to an authentication portal through a SAML IdP. This is distinct from
sso provider <name> blocks, which configure the portal as an IdP for SSO apps
and belong in configuration-sso-app.
Read these files when details matter:
caddyfile_identity.goandcaddyfile_identity_provider.gofor parser dispatch and accepted provider fields.- The selected go-authcrunch module's
pkg/idp/saml/for validation, metadata handling, assertion validation, and driver behavior. Resolve its directory withgo list -m -json github.com/greenpau/go-authcrunch; a sibling checkout may differ from the selected version.
Shape
{
security {
saml identity provider azure {
realm azure
driver azure
idp_metadata_location /etc/caddy/saml/azure_metadata.xml
idp_sign_cert_location /etc/caddy/saml/azure_signing_cert.pem
tenant_id {env.AZURE_TENANT_ID}
application_id {env.AZURE_APP_ID}
application_name "Example Portal"
entity_id "urn:caddy:example-portal"
acs_url https://auth.example.com/auth/saml/azure
}
authentication portal myportal {
enable identity provider azure
}
}
}
The provider name must match the portal's enable identity provider <name>.
The realm becomes the login realm and is commonly matched in transforms:
transform user {
match realm azure
action add role authp/user
}
Provider Notes
The selected library binds the SAML response to its initiating browser using
the portal's SAML session cookie. Configure its name inside the portal with
cookie saml session id name <name> or the shared cookie prefix; see
cookie names and attributes.
Keep this cookie distinct from access, OIDC and refresh cookies.
Login must start at the portal: unsolicited IdP-initiated responses are disabled.
The response must return the issued RelayState and matching request ID to the
same browser and ACS URL. Expired, missing, replayed or foreign-browser state
fails; start a new portal login rather than replaying the assertion.
What ships with it
1 file 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 · 173 lines · 51 tokens per session scan A 1e96d95eee86
configuration-saml-providers is a skill published in the GitHub repository greenpau/caddy-security (2,263 stars, last pushed today), licensed Apache-2.0. It adds 51 tokens to every session and 1,796 once invoked, about $0.0002 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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