secutils-csp

A tool for creating, editing, sharing, saving, and importing Content Security Policy templates. A Content Security Policy is a browser rule set that controls which scripts, images, styles, and other resources a web page may load.

In plain words
What is it for?
Use it to build policy templates, save or share them, and import policies from a page's security header or HTML tag.
Why use it?
It removes the need to write and transfer these browser security rules as plain text. It can also import the policy currently published by a web page.

Skill for Claude CodeCodex

Install

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.

agentmods
npx agentmods add skills/secutils-dev/secutils/csp
Any agent
npx skills add secutils-dev/secutils --skill csp
Clone the repo
git clone --depth 1 https://github.com/secutils-dev/secutils

Made for: Claude Code, Codex.

Per session 156 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,454 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00156 $0.01454
Opus 5 $0.00078 $0.00727
Sonnet 5 $0.00031 $0.00291
Haiku 4.5 $0.00016 $0.00145

Measured 2d ago against content hash d277d938bcec, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

secutils-csp scanned grade A with 1 finding 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 2d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

## Example flow (curl)
components/secutils-docs/static/guides/web_security/csp/SKILL.md · 136 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Changes

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.

  1. 2d ago First seen · 136 lines · 156 tokens per session scan A d277d938bcec

Subscribe to this mod's changes

secutils-csp is a skill published in the GitHub repository secutils-dev/secutils (101 stars, last pushed 10d ago), licensed AGPL-3.0. It adds 156 tokens to every session and 1,454 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.