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 AeonDave/malskill --skill crypto-ctfgit clone --depth 1 https://github.com/AeonDave/malskillWrote 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/aeondave/malskill/crypto-ctf)<a href="https://agentmods.dev/skills/aeondave/malskill/crypto-ctf"><img src="https://agentmods.dev/badge/skills/aeondave/malskill/crypto-ctf.svg" alt="Measured on agentmods" 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 | $0.00037 | $0.01734 |
| Opus 5 | $0.00018 | $0.00867 |
| Sonnet 5 | $0.00007 | $0.00347 |
| Haiku 4.5 | $0.00004 | $0.00173 |
Grade A, and why
crypto-ctf 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 4d 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
What ships with it
13 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.
- references/advanced-math.md 27 KB
- references/classic-ciphers.md 26 KB
- references/ecc-attacks.md 19 KB
- references/exotic-crypto.md 40 KB
- references/historical.md 4.4 KB
- references/lattice-and-lwe.md 15 KB
- references/modern-cipher-modes-and-forgery.md 33 KB
- references/modern-hash-mac-and-collision-attacks.md 21 KB
- references/modern-oracles-protocols-and-custom-crypto.md 26 KB
- references/prng.md 38 KB
- references/rsa-attacks.md 42 KB
- references/stream-ciphers.md 16 KB
- references/zkp-and-advanced.md 20 KB
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.
- 4d ago First seen · 107 lines · 37 tokens per session scan A b1cc263740e0
crypto-ctf is a skill published in the GitHub repository AeonDave/malskill (18 stars, last pushed 3d ago), with no licence file. It adds 37 tokens to every session and 1,734 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 2026-09-03.
Other skills, from other repositories
google-agents-cli-onboarding
Onboarding entrypoint for agents-cli in Agent Platform. It should be used when the user wants to "create a new agent", "develop an agent", "build an agent using ADK", "run the agent locally", "debug agent code", "test an agent", "evaluate an agent", "deploy an agent", "publish an agent", "monitor an agent", or needs…
81-pipecat
Create your Pipecat skill from official documentation, then learn to improve it throughout the chapter.
35-google-adk-reliable-agents
Create your Google Agent Development Kit skill in one prompt, then learn to improve it throughout the chapter.
rust-learner
Learn Rust language features and crate updates. Use when user asks about Rust version changelog, what's new in Rust, crate updates, Cargo.toml dependencies, tokio/serde/axum features, or any Rust ecosystem questions.
explain-this
Explain whatever the user is pointing at right now in plain language: a pending question, a piece of code, an error, a command output, or an artifact like a plan or findings report. Use when the user asks to "explain this", "what am I being asked", "what's happening right now", "help me understand this", "what does…
scaffold-exercises
A template builder for coding exercises, organized into sections and exercises with problem, solution, and explanation folders. It creates the files and structure expected by the project’s lint checker.