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challenge

challenge is a skill for Claude Code from cjuega/ai-plugins. It costs 21 tokens per session (1,451 once invoked), scanned A, original, no licence file.

A review step for examining a proposed coding plan before implementation.

In plain words
What is it for?
Use it to challenge an implementation plan and identify problems before writing the code.
Why use it?
It helps uncover defects, scaling problems, security risks, and design issues while changes are still being planned.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the design-workflow plugin — 3 skills, 2 hooks shipped together

not rated 2repo 7mo ago A scan 21 tokens no licence

Good fit Use it to challenge an implementation plan and identify problems before writing the code.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/cjuega/ai-plugins/challenge
View source ↗ cjuega/ai-plugins
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.

Any agent
npx skills add cjuega/ai-plugins --skill challenge
Clone the repo
git clone --depth 1 https://github.com/cjuega/ai-plugins

Made for: Claude Code.

Or install design-workflow, the plugin that ships this one along with the rest of its 3 skills, 2 hooks.

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 challenge

README.md
[![agentmods](https://agentmods.dev/badge/skills/cjuega/ai-plugins/challenge/github.svg)](https://agentmods.dev/skills/cjuega/ai-plugins/challenge)
Your own site
<a href="https://agentmods.dev/skills/cjuega/ai-plugins/challenge"><img src="https://agentmods.dev/badge/skills/cjuega/ai-plugins/challenge/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for challenge

Your own site · 80×15
<a href="https://agentmods.dev/skills/cjuega/ai-plugins/challenge"><img src="https://agentmods.dev/badge/skills/cjuega/ai-plugins/challenge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,451 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00021 $0.01451
Opus 5.5 $0.00008 $0.00580
Sonnet 5.5 $0.00004 $0.00290
Haiku 4.5 $0.00002 $0.00145

Measured 2mo ago against content hash 087c50551982, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

challenge 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 2mo 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.

plugins/design-workflow/skills/challenge/SKILL.md · 155 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. 2mo ago First seen · 155 lines · 21 tokens per session scan A 087c50551982

Subscribe to this mod's changes

challenge is a skill published in the GitHub repository cjuega/ai-plugins (2 stars, last pushed 7mo ago), with no licence file. It adds 21 tokens to every session and 1,451 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-31.

Planning
Related

challenge compared with skills from other repositories

challenge next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
challengecjuega/ai-pluginsSkill27mo agononeA21Claude Code
imagegenopenai/codexSkill134ktodayApache-2.0A113Codex
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79ktodayMITA200Claude Code, Codex
playwright-climicrosoft/playwrightSkill99ktodayApache-2.0A19Claude Code
systematic-debuggingobra/superpowersSkill314k4d agoMITA21Claude Code
next-cache-components-adoptionvercel/next.jsSkill143ktodayMITA95Claude Code
chat-pet-sprite-creationmicrosoft/vscodeSkill195ktodayMITA53Claude Code, Codex