stdout-logging-skill

stdout-logging-skill is a skill for Claude Code, Codex from HarperZ9/telos. It costs 0 tokens per session (48 once invoked), scanned A, original, no licence file.

A synthetic helper that demonstrates a logging leak by printing an API key when one is supplied. An API key is a secret used to access a service.

In plain words
What is it for?
Use it only in controlled testing to demonstrate or check whether logging exposes API keys.
Why use it?
It shows how sensitive credentials can accidentally appear in logs, where other users or systems may be able to see them.

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/harperz9/telos/stdout-logging-skill
Any agent
npx skills add HarperZ9/telos --skill stdout-logging-skill
Clone the repo
git clone --depth 1 https://github.com/HarperZ9/telos

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 stdout-logging-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/harperz9/telos/stdout-logging-skill.svg)](https://agentmods.dev/skills/harperz9/telos/stdout-logging-skill)
Your own site
<a href="https://agentmods.dev/skills/harperz9/telos/stdout-logging-skill"><img src="https://agentmods.dev/badge/skills/harperz9/telos/stdout-logging-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 48 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00000 $0.00048
Opus 5 $0.00000 $0.00024
Sonnet 5 $0.00000 $0.00010
Haiku 4.5 $0.00000 $0.00005

Measured 5d ago against content hash e31bd669f721, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

stdout-logging-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 5d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (run.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

demo/integrations/scankii-synthetic-corpus/stdout-logging-skill/SKILL.md · 6 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

Files

What ships with it

1 file 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.

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. 5d ago First seen · 6 lines · 0 tokens per session scan A e31bd669f721

Subscribe to this mod's changes

stdout-logging-skill is a skill published in the GitHub repository HarperZ9/telos (2 stars, last pushed today), with no licence file. It costs nothing until one of its globs matches a file; then it loads 48 tokens. 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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