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-usersgit 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-users)<a href="https://agentmods.dev/skills/greenpau/caddy-security/configuration-users"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-users/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-users"><img src="https://agentmods.dev/badge/skills/greenpau/caddy-security/configuration-users.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 | $0.00044 | $0.01680 |
| Opus 5.5 | $0.00018 | $0.00672 |
| Sonnet 5.5 | $0.00009 | $0.00336 |
| Haiku 4.5 | $0.00004 | $0.00168 |
Grade A, and why
configuration-users 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 — 166 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Configuration Users
Purpose
Use this skill for user <username> entries inside local identity store
blocks. The Caddyfile syntax is authoritative in caddyfile_identity_store.go;
the provisioning behavior is authoritative in the selected go-authcrunch module,
especially pkg/ids/local/user.go, pkg/ids/local/authenticator.go, and
pkg/identity/database.go.
The surrounding store belongs to configuration-identity-stores; account changes do not require reloading that router unless store settings change.
Shape
local identity store localdb {
realm local
path assets/config/users.json
user alice {
name "Alice Example"
email [email protected]
password {env.ALICE_PASSWORD} overwrite
roles authp/user authp/admin
api key kid123456789012345678901 {env.ALICE_API_KEY_BCRYPT}
}
}
kid123456789012345678901 is intentionally 24 characters. For static user API
keys, authcrunch treats the Caddyfile key id as the API key prefix and currently
requires exactly 24 characters.
Fields
The current Caddyfile parser supports only these subdirectives:
name <full name>with one or more words; multi-word names are joined with spaces.email <address>.password <plaintext_or_imported_hash> [overwrite].roles <role> [<role>...].api key <key_id> <bcrypt_value_or_secret_reference>.auth challenges <rule body>; repeat to append ordered rules.
Use overwrite when the configured password should replace the existing
stored password during provisioning. Supported passwords may be plaintext,
bcrypt:<cost>:<hash>, or argon2:<PHC> imports. The unchanged plaintext
path creates bcrypt hashes. Static API-key payloads remain bcrypt;
password-import support does not change their format. Read password imports
and generation for the exact Argon2 format,
generation commands, resource limits, trusted-input boundary, and Caddy
qualification.
Duplicate password updates can reuse the active hash while still advancing the
account's credential version. Legacy records without credential_version
remain supported. See local identity compatibility
for update versus reset behavior, invalidation, and Caddy tests.
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 · 166 lines · 44 tokens per session scan A beb55ec428af
configuration-users is a skill published in the GitHub repository greenpau/caddy-security (2,263 stars, last pushed today), licensed Apache-2.0. It adds 44 tokens to every session and 1,680 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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