fixture-skill

fixture-skill is a skill for Claude Code, Codex from nicolasmelo1/logion. It costs 3 tokens per session (16 once invoked), scanned A, original, MIT.

A versioned catalogue of AI-agent add-ons, including skills, plugins, tool servers, and models. It records where each item came from and what evidence supports it.

In plain words
What is it for?
Use it to find and verify agent artifacts across different agent systems and open protocols.
Why use it?
It helps check whether an add-on really works with a particular agent instead of relying only on its description.

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/nicolasmelo1/logion/invalid_bundle
Any agent
npx skills add nicolasmelo1/logion --skill invalid_bundle
Clone the repo
git clone --depth 1 https://github.com/nicolasmelo1/logion

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 fixture-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/nicolasmelo1/logion/invalid_bundle.svg)](https://agentmods.dev/skills/nicolasmelo1/logion/invalid_bundle)
Your own site
<a href="https://agentmods.dev/skills/nicolasmelo1/logion/invalid_bundle"><img src="https://agentmods.dev/badge/skills/nicolasmelo1/logion/invalid_bundle.svg" alt="Measured on agentmods" height="20"></a>
Per session 3 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 16 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00003 $0.00016
Opus 5 $0.00002 $0.00008
Sonnet 5 $0.00001 $0.00003
Haiku 4.5 $0.00000 $0.00002

Measured 4d ago against content hash 5ad6b2a1ce0f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

fixture-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 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

packages/cli/tests/fixtures/capabilities/invalid_bundle/SKILL.md · 6 lines

What it actually says

Fixture Skill

Files

What ships with it

2 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.

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. 4d ago First seen · 6 lines · 3 tokens per session scan A 5ad6b2a1ce0f

Subscribe to this mod's changes

fixture-skill is a skill published in the GitHub repository nicolasmelo1/logion (36 stars, last pushed today), licensed MIT. It adds 3 tokens to every session and 16 once invoked, about $0.0000 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 2026-08-30.

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