challenge

challenge is a skill for Claude Code, Codex from blueberrycongee/termcanvas. It costs 41 tokens per session (1,346 once invoked), scanned A, original, MIT.

An adversarial review process that examines an idea, argument, proposal, or opinion from several independent critical viewpoints.

In plain words
What is it for?
Use it to stress-test a claim, decision, or plan by extracting its main argument and having separate reviewers challenge it using different methods.
Why use it?
It helps reveal weak assumptions, objections, and missing considerations before you commit to a position or design.

Skill for Claude CodeCodex

Part of the skills plugin — 7 skills, 1 hook shipped together

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

Made for: Claude Code, Codex.

Or install skills, the plugin that ships this one along with the rest of its 7 skills, 1 hook.

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/blueberrycongee/termcanvas/challenge.svg)](https://agentmods.dev/skills/blueberrycongee/termcanvas/challenge)
Your own site
<a href="https://agentmods.dev/skills/blueberrycongee/termcanvas/challenge"><img src="https://agentmods.dev/badge/skills/blueberrycongee/termcanvas/challenge.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,346 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 $0.00041 $0.01346
Opus 5 $0.00020 $0.00673
Sonnet 5 $0.00008 $0.00269
Haiku 4.5 $0.00004 $0.00135

Measured 4d ago against content hash 6043921f193d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 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.

skills/skills/challenge/SKILL.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Challenge

Multi-angle adversarial review via isolated Hydra workers. Each worker attacks the same input using a different analytical method, with no visibility into the others' reasoning.

When to use

  • User says "challenge this", "stress-test this", "poke holes in this", "what am I missing", "argue against this", or similar
  • User has been discussing a topic and wants independent critical review
  • Any argument, proposal, opinion, decision, or design that needs pressure-testing

Step 1: Extract

Summarize the argument/proposal/opinion from the current conversation into a neutral, complete brief. Include:

  • The core claim or proposal
  • Key supporting reasons the user or you have discussed
  • Any constraints or context that are relevant

Do NOT editorialize or signal which parts you think are weak. The summary must be fair — biased summaries defeat the purpose.

Step 2: Spawn 4 workers

Use hydra spawn to launch 4 parallel workers. Each worker receives the same summary but a different methodology prompt. Inherit the current terminal's provider via --worker-type.

Worker prompts

Each worker prompt must include, in this order:

  1. The mandatory preamble below (verbatim)
  2. The full summary from Step 1
  3. The methodology instructions below (one per worker)
  4. Instruction to write findings to result.json atomically

Mandatory preamble (prepend to every worker prompt verbatim)

SCOPE RULE — strictly enforced. Your analysis MUST extend beyond the immediate input. The input is your starting point, not your boundary. You are required to:

  1. Follow every chain. When you find something, do not note it and move on. Ask "what does this lead to?" and trace it at least 2-3 links further. Each link must be a concrete step, not a vague worry.
  2. Search outward. For every finding, actively look for evidence from outside the input's immediate context — other fields, other systems, historical precedents, known failure cases, research, prior art. If you cannot name a specific external reference, you have not searched wide enough.
  3. Refuse shallow answers. If a finding can be stated in one sentence with no chain and no external reference, it is not finished. Deepen it or discard it.

A review that stays inside the input's own frame is a failure. You will be evaluated on depth of chains and breadth of external evidence.

Read the full file on GitHub · 158 lines

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 · 158 lines · 41 tokens per session scan A 6043921f193d

Subscribe to this mod's changes

challenge is a skill published in the GitHub repository blueberrycongee/termcanvas (393 stars, last pushed 3mo ago), licensed MIT. It adds 41 tokens to every session and 1,346 once invoked, about $0.0002 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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