negative-path

negative-path is a skill for Claude Code, Codex from danielvm-git/bigpowers. It costs 0 tokens per session (59 once invoked), scanned A, original, MIT.

A deliberately incomplete skill file used to test whether a validator detects missing required instructions.

In plain words
What is it for?
It is for automated tests of skill parsing and validation tools.
Why use it?
It helps test that compliance checks fail when an expected requirement is absent.

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/danielvm-git/bigpowers/negative-path
Any agent
npx skills add danielvm-git/bigpowers --skill negative-path
Clone the repo
git clone --depth 1 https://github.com/danielvm-git/bigpowers

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 negative-path

README.md
[![agentmods](https://agentmods.dev/badge/skills/danielvm-git/bigpowers/negative-path.svg)](https://agentmods.dev/skills/danielvm-git/bigpowers/negative-path)
Your own site
<a href="https://agentmods.dev/skills/danielvm-git/bigpowers/negative-path"><img src="https://agentmods.dev/badge/skills/danielvm-git/bigpowers/negative-path.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 59 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 $0.00000 $0.00059
Opus 5 $0.00000 $0.00030
Sonnet 5 $0.00000 $0.00012
Haiku 4.5 $0.00000 $0.00006

Measured yesterday against content hash 085661fa636a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

negative-path 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 yesterday.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/too-long.sh, specs/verifications/steps/too-long-step.sh), 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.

specs/verifications/fixtures/negative-path/SKILL.md · 7 lines

What it actually says

Bad Skill — DELIBERATELY BROKEN FIXTURE

This SKILL.md intentionally omits HARD GATE blocks.

Used by golden-g07-negative-path.sh.

This skill does not have any HARD GATE callout blocks, which violates the superpowers compliance requirement.

Files

What ships with it

3 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. yesterday First seen · 7 lines · 0 tokens per session scan A 085661fa636a

Subscribe to this mod's changes

negative-path is a skill published in the GitHub repository danielvm-git/bigpowers (163 stars, last pushed 3d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 59 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 2026-09-03.

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