distill-skill

distill-skill is a skill for Claude Code, Codex from SecurityTalent/bugskill-ai. It costs 105 tokens per session (1,367 once invoked), scanned A, a copy of distill-skill, MIT.

A tool that turns security reports, articles, books, or walkthroughs into reusable instructions for finding the same type of weakness in another system.

In plain words
What is it for?
It helps create security skill files for web, mobile, and continuous integration and delivery vulnerabilities.
Why use it?
It saves the transferable security method instead of requiring the original source to be studied again each time.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions .claude-plugin; mentions Claude Code.

Good fit It helps create security skill files for web, mobile, and continuous integration and delivery vulnerabilities.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/securitytalent/bugskill-ai/distill-skill
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 SecurityTalent/bugskill-ai --skill distill-skill
Clone the repo
git clone --depth 1 https://github.com/SecurityTalent/bugskill-ai

Made for: Claude Code, Codex.

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 distill-skill

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/distill-skill"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/distill-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,367 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 100% copy Near-identical to another mod 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 $0.00105 $0.01367
Opus 5.5 $0.00042 $0.00547
Sonnet 5.5 $0.00021 $0.00273
Haiku 4.5 $0.00011 $0.00137

Measured 20d ago against content hash a73e4745da4f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

distill-skill 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 20d 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.

Origin

This is a copy

100% identical to distill-skill — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

Awesome-Claude-Code-Agent-Skills/09-AI-Security-and-Orchestration/distill-skill/SKILL.md · 153 lines

How it starts

The opening of the file, as written. The whole thing — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Distill Security Content to Skill

You are a knowledge distiller. Your job is to read raw security content — whatever form it comes in — and extract the reusable, transferable technique so another AI can use it to hunt the same class of vulnerability on a new target.

Repository Structure

Skills are organized by domain, then category:

skills/
  meta/              ← skill generation and self-improvement tooling
    distill-skill/
    observe-skill/
    amend-skill/
  web/               ← web application security
    recon/
    auth/
    session/
    authz/
    injection/
    client-side/
    logic/
  mobile/            ← mobile security (Android + iOS)
    storage/
    crypto/
    auth/
    network/
    platform/
    code/
    resilience/
  cicd/              ← CI/CD pipeline security

Choose the right bucket:

  • web/ — web application vulnerabilities (any source: OWASP WSTG, blog posts, CVEs, bug bounty)
  • mobile/ — mobile security (any source: OWASP MASTG, research, writeups)
  • cicd/ — CI/CD pipeline security (any source)
  • meta/ — skill tooling

Examples:

skills/web/injection/sql-injection/SKILL.md
skills/web/authz/bola-idor/SKILL.md
skills/mobile/storage/mobile-insecure-storage/SKILL.md
skills/mobile/crypto/mobile-weak-crypto/SKILL.md
skills/cicd/pwn-request/SKILL.md
skills/web/client-side/cspt/SKILL.md

Understanding the Source

Different sources carry different signal. Adapt your extraction focus accordingly:

  • Bug report — mine for PoC mechanics, exact bypass, impact chain, payload
  • Walkthrough / CTF writeup — focus on step ordering, tool choices, decision points, dead ends worth noting
  • Pentest report — look for finding chains, lateral movement, misconfig patterns, what remediation they got wrong
  • Blog post — extract the novel insight, the edge case, the researcher's mental model
  • Ezine (Phrack, PoC||GTFO, etc.) — go deep on the primitive, the spec abuse, the creative leap
  • Book chapter — pull out the taxonomy, the methodology scaffold, the conceptual model

Read the full file on GitHub · 153 lines

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. 20d ago First seen · 153 lines · 105 tokens per session scan A a73e4745da4f

Subscribe to this mod's changes

distill-skill is a skill published in the GitHub repository SecurityTalent/bugskill-ai (13 stars, last pushed 21d ago), licensed MIT. It adds 105 tokens to every session and 1,367 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to distill-skill, differing in 0 lines, and is treated as a copy.

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