sumsec-skills

sumsec-skills is a skill for Claude Code from SummerSec/SumSec-Skills. It costs 34 tokens per session (280 once invoked), scanned A, original, Apache-2.0.

A collection of reusable instructions for an AI coding agent, covering writing, development tools, plugin building, email, design, and instruction checking.

In plain words
What is it for?
It helps with Chinese writing, Git workflows, documentation lookup, frontend design, agent and plugin development, Cloudflare email, visual design, and checking instruction wording.
Why use it?
It groups repeatable guidance in one place so the agent can load the relevant instructions for a task.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the sumsec-skills plugin — 2 skills, 2 hooks, 9 plugins shipped together

Good fit It helps with Chinese writing, Git workflows, documentation lookup, frontend design, agent and plugin development, Cloudflare email, visual design, and checking instruction wording.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/summersec/sumsec-skills/sumsec-skills
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.

Any agent
npx skills add SummerSec/SumSec-Skills --skill sumsec-skills
Clone the repo
git clone --depth 1 https://github.com/SummerSec/SumSec-Skills

Made for: Claude Code.

Or install sumsec-skills, the plugin that ships this one along with the rest of its 2 skills, 2 hooks, 9 plugins.

Wrote 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.

agentmods badge for sumsec-skills

README.md
[![agentmods](https://agentmods.dev/badge/skills/summersec/sumsec-skills/sumsec-skills/github.svg)](https://agentmods.dev/skills/summersec/sumsec-skills/sumsec-skills)
Your own site
<a href="https://agentmods.dev/skills/summersec/sumsec-skills/sumsec-skills"><img src="https://agentmods.dev/badge/skills/summersec/sumsec-skills/sumsec-skills/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.

agentmods 80×15 button for sumsec-skills

Your own site · 80×15
<a href="https://agentmods.dev/skills/summersec/sumsec-skills/sumsec-skills"><img src="https://agentmods.dev/badge/skills/summersec/sumsec-skills/sumsec-skills.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 280 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 5.1 $0.00034 $0.00280
Opus 5 $0.00017 $0.00140
Sonnet 5 $0.00007 $0.00056
Haiku 4.5 $0.00003 $0.00028

Measured 10d ago against content hash 7706e746faff, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

sumsec-skills 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 10d 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.

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.

hermes/skills/sumsec-skills/SKILL.md · 25 lines

What it actually says

SumSec-Skills (Hermes)

Reusable Agent Skills organized by plugin category. Each skill lives at <plugin>/skills/<name>/SKILL.md.

  • writing-zh/: humanizer-zh, sumsec-illustrations
  • dev-tools/: git-commit-pr, agent-chat-history, context7-cli/mcp/find-docs, frontend-design
  • agents-dev/: skill-creator, writing-rules, plugin-dev skills, agent-sdk-dev, skill-optimizer, multi-platform-plugin-guide
  • cloudflare-email/: cf-temp-mail-agent-mail
  • taste-skill/: frontend design taste, redesign, image-to-code, brand-kit, and visual-style skills
  • semantic-linter/: detect wide-boundary wording in Skill/Prompt/Agent instructions; lexicon and rules install helpers

Load a skill's SKILL.md when the task matches its description frontmatter.

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. 10d ago First seen · 25 lines · 34 tokens per session scan A 7706e746faff

Subscribe to this mod's changes

sumsec-skills is a skill published in the GitHub repository SummerSec/SumSec-Skills (8 stars, last pushed 25d ago), licensed Apache-2.0. It adds 34 tokens to every session and 280 once invoked, about $0.0002 per session on Opus 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 2026-08-31.

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