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-logginggit 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-logging)<a href="https://agentmods.dev/skills/greenpau/caddy-security/configuration-logging"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-logging/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-logging"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-logging.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 | $0.00036 | $0.02867 |
| Opus 5.5 | $0.00014 | $0.01147 |
| Sonnet 5.5 | $0.00007 | $0.00573 |
| Haiku 4.5 | $0.00004 | $0.00287 |
Grade A, and why
configuration-logging 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 — 247 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Configuration Logging
Supported Scope
The root security logging block configures AuthCrunch component diagnostics.
The selected Caddy's independent http.handlers.authentication logger remains
unfiltered. Issue #280 is not fixed by this adapter. Read the host boundary
below before recommending the issue's message/error patterns to an operator.
Current authorize Caddyfiles use http.handlers.authorization; the legacy
JSON authentication-provider chain is still supported and emits the host error.
Do not change that chain's behavior to silence it.
The selected AuthCrunch module supplies Config.Logging, pkg/logging, the shared
parser, and root logger wrapping. No local replacement or library release is
needed for these interfaces. Recheck go list -m -json when dependencies change;
the dependency workflow
owns selection changes. Sibling source and skills remain read-only references.
Configuration
Inside the global options block:
{
security {
logging {
skip exact text "token validation error"
}
}
}
This suppresses the AuthCrunch gatekeeper's diagnostic message; it leaves its returned errors, HTTP denial, redirects and authorization decisions unchanged. Other security declarations and site routes are configured normally.
The complete body grammar is one statement per line:
skip <exact|partial|prefix|suffix|regex> text <value>
Every statement has four tokens. Quote multiword values. Repeated rules,
including identical rules and imported rule bodies, append in order and match
with OR. Duplicate logging blocks, header arguments, nested blocks, empty
tokens, malformed keywords/arity, invalid regular expressions, whitespace-only
text and raw newlines are rejected with location-aware errors. Omission or an
empty multiline block suppresses nothing; there are no implicit rules.
The enclosing global security option also occurs once; repeating it fails
instead of silently replacing the earlier app and discarding its rules.
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 · 247 lines · 36 tokens per session scan A 61f381cf5ab8
configuration-logging is a skill published in the GitHub repository greenpau/caddy-security (2,263 stars, last pushed today), licensed Apache-2.0. It adds 36 tokens to every session and 2,867 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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