no-vibe-challenge

no-vibe-challenge is a skill for Claude Code from rizukirr/no-vibe. It costs 38 tokens per session (899 once invoked), scanned A, original, MIT.

A coding exercise generator that creates a challenge from the current project or learning session. The learner writes the code, while the assistant provides constraints, hints, and review.

In plain words
What is it for?
Use it for practice on a project or topic such as error handling or recursion, with challenges adapted to an active learning session when one exists.
Why use it?
It provides focused practice without having the AI complete the implementation, helping the learner apply what they are studying.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: $skill-name invocation.

Part of the no-vibe plugin — 3 skills, 3 commands shipped together

Good fit Use it for practice on a project or topic such as error handling or recursion, with challenges adapted to an active learning session when one exists.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rizukirr/no-vibe/no-vibe-challenge
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 rizukirr/no-vibe --skill no-vibe-challenge
Clone the repo
git clone --depth 1 https://github.com/rizukirr/no-vibe

Made for: Claude Code.

Or install no-vibe, the plugin that ships this one along with the rest of its 3 skills, 3 commands.

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 no-vibe-challenge

README.md
[![agentmods](https://agentmods.dev/badge/skills/rizukirr/no-vibe/no-vibe-challenge/github.svg)](https://agentmods.dev/skills/rizukirr/no-vibe/no-vibe-challenge)
Your own site
<a href="https://agentmods.dev/skills/rizukirr/no-vibe/no-vibe-challenge"><img src="https://agentmods.dev/badge/skills/rizukirr/no-vibe/no-vibe-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 no-vibe-challenge

Your own site · 80×15
<a href="https://agentmods.dev/skills/rizukirr/no-vibe/no-vibe-challenge"><img src="https://agentmods.dev/badge/skills/rizukirr/no-vibe/no-vibe-challenge.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 899 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 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 5.1 $0.00038 $0.00899
Opus 5 $0.00019 $0.00449
Sonnet 5 $0.00008 $0.00180
Haiku 4.5 $0.00004 $0.00090

Measured 13d ago against content hash 21f5d41efc86, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

no-vibe-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 13d 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/no-vibe/skills/no-vibe-challenge/SKILL.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

no-vibe-challenge

Generate a hands-on coding challenge. The user writes everything.

Inputs

Treat text after $no-vibe-challenge as an optional focus area.

Examples:

  • $no-vibe-challenge
  • $no-vibe-challenge error handling
  • $no-vibe-challenge recursion

Workflow

1. Activate no-vibe mode

Run:

mkdir -p .no-vibe/notes .no-vibe/refs .no-vibe/data/sessions && touch .no-vibe/active

Verify:

test -f .no-vibe/active

If verified, state: no-vibe is active (.no-vibe/active exists).

2. Determine challenge context

Check for in-progress sessions:

grep -rl '"status": "in_progress"' .no-vibe/data/sessions/ 2>/dev/null
  • If an active session exists: read session JSON and generate a challenge that reinforces what the user just learned.
  • If no active session exists: inspect the project to infer stack/domain and generate a relevant challenge.
  • If a focus area was provided: narrow challenge scope to that area while keeping project/session relevance.

3. Read the adaptation stack

Read (when present):

  • ~/.no-vibe/PROFILE.md — global stable identity. The AI's record of how this user learns across every project.
  • .no-vibe/SUMMARY.md — project running journey. Current focus, accomplishments, and open questions in this codebase.
  • Every *.md under ~/.no-vibe/user/ and .no-vibe/user/ — user-only overrides; authoritative on conflict, AI never writes here.

Calibrate challenge difficulty:

  • PROFILE.md ## Identity & expertise or ## Observed strengths flags topic competence ("solid on Go", (seen 4×)) → tune scope upward.
  • PROFILE.md ## Known gaps flags weak areas → tune scope downward, more scaffolding.
  • PROFILE.md ## Disclosure mode records the user's default disclosure preference (guided vs. showcase) — apply the same default when sketching the challenge prompt; prediction_gate: off skips the predict-before-run micro-check.
  • SUMMARY.md ## Open Questions flags concepts the user dodged in prior layers → reinforce them in the challenge.
  • SUMMARY.md ## Accomplishments shows what the user has already built → build on a recent success or revisit a recent Block area.
  • Any user/*.md file naming an explicit constraint → respect it without re-asking.

Read the full file on GitHub · 114 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. 13d ago First seen · 114 lines · 38 tokens per session scan A 21f5d41efc86

Subscribe to this mod's changes

no-vibe-challenge is a skill published in the GitHub repository rizukirr/no-vibe (36 stars, last pushed 3mo ago), licensed MIT. It adds 38 tokens to every session and 899 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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