ctf-misc

A collection of techniques for solving miscellaneous capture-the-flag security challenges that do not fit common categories such as web or cryptography.

In plain words
What is it for?
Use it for encoding puzzles, Python or Bash sandbox escapes, RF and SDR signals, game or virtual-machine reverse engineering, Kubernetes permissions, floating-point tricks, Z3 constraint solving, and game theory.
Why use it?
It gives you a place to work through varied puzzles involving code, signals, virtual machines, cloud permissions, mathematics, or games.

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/wgpsec/aboutsecurity/ctf-misc
Any agent
npx skills add wgpsec/AboutSecurity --skill ctf-misc
Clone the repo
git clone --depth 1 https://github.com/wgpsec/AboutSecurity

Made for: Claude Code, Codex.

Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,328 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 $0.00098 $0.01328
Opus 5 $0.00049 $0.00664
Sonnet 5 $0.00020 $0.00266
Haiku 4.5 $0.00010 $0.00133

Measured 3d ago against content hash 53f318a93c8b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

ctf-misc 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 3d 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

| `breakpoint()` → `os.system()` | Python 3.7+ |
skills/ctf/ctf-misc/SKILL.md · 99 lines

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.

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. 3d ago First seen · 99 lines · 98 tokens per session scan A 53f318a93c8b

Subscribe to this mod's changes

ctf-misc is a skill published in the GitHub repository wgpsec/AboutSecurity (1,709 stars, last pushed 3d ago), with no licence file. It adds 98 tokens to every session and 1,328 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.