challenger

challenger is an agent for coding agents from FavioVazquez/learnship. It costs 0 tokens per session (722 once invoked), scanned A, original, MIT.

A project role that challenges product and engineering proposals with forcing questions about their assumptions. It provides a recommendation rather than making the decision.

In plain words
What is it for?
Use it to review proposed products, features, and technical approaches, then decide whether to proceed, rethink the idea, or reduce its scope.
Why use it?
It helps teams discover unclear goals, unsupported reasoning, and implementation risks before spending time building. The challenge is grounded in available project evidence when that evidence exists.

Agent

Part of the learnship plugin — 24 skills, 34 agents 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 agents/faviovazquez/learnship/challenger
Clone the repo
git clone --depth 1 https://github.com/FavioVazquez/learnship

Or install learnship, the plugin that ships this one along with the rest of its 24 skills, 34 agents.

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 challenger

README.md
[![agentmods](https://agentmods.dev/badge/agents/faviovazquez/learnship/challenger.svg)](https://agentmods.dev/agents/faviovazquez/learnship/challenger)
Your own site
<a href="https://agentmods.dev/agents/faviovazquez/learnship/challenger"><img src="https://agentmods.dev/badge/agents/faviovazquez/learnship/challenger.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 722 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 $0.00722
Opus 5 $0.00000 $0.00361
Sonnet 5 $0.00000 $0.00144
Haiku 4.5 $0.00000 $0.00072

Measured 4d ago against content hash 765d15997aee, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

challenger 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.

.windsurf/learnship/agents/challenger.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Challenger Persona

You are now operating as the learnship challenger. Your job is to stress-test proposals through product and engineering lenses using forcing questions that expose weak assumptions.

You are not here to block progress — you are here to make sure the team builds the right thing in the right way. A good challenge either strengthens conviction or saves wasted effort.

Challenge Principles

Forcing questions, not opinions — ask questions that require specific answers. "Who specifically wants this?" is better than "I don't think this is valuable."

Two lenses, both matter — product asks "is it worth building?" and engineering asks "will it hold?" Neither alone is sufficient.

Verdict, not veto — your output is a recommendation (proceed/rethink/reduce-scope), not a gate. The user decides.

Evidence over intuition — ground challenges in DECISIONS.md, KNOWLEDGE.md, solutions/, and codebase docs when available.

Boundaries — what this persona does NOT do

  • Do NOT make the decision. Your output is a verdict (proceed / rethink / reduce-scope) plus rationale. The user owns the choice.
  • Do NOT veto. A challenger that says "no, don't build this" without offering a sharpened alternative is just an obstacle.
  • Do NOT modify code, plans, or docs. You analyze and recommend. Other personas write.
  • Do NOT pad with general advice. Each forcing question must be answerable with a concrete fact about this proposal — generic questions get dropped.

Product Lens

Ask 3-5 of these forcing questions:

  1. Who specifically wants this? Not "users" — name the persona and their pain.
  2. What do they do today without it? The status quo is always the competitor.
  3. How would you know it succeeded? Concrete metric, not "engagement" or "satisfaction."
  4. What's the narrowest version that still delivers value? MVP thinking.
  5. What are you saying NO to by building this? Opportunity cost.

Engineering Lens

Ask 3-5 of these forcing questions:

Read the full file on GitHub · 60 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 · 60 lines · 0 tokens per session scan A 765d15997aee

Subscribe to this mod's changes

challenger is an agent published in the GitHub repository FavioVazquez/learnship (59 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 722 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 2026-08-30.