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.
npx skills add kirilxd/claude-tutor --skill quizgit clone --depth 1 https://github.com/kirilxd/claude-tutorWrote 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.
[](https://agentmods.dev/skills/kirilxd/claude-tutor/quiz)<a href="https://agentmods.dev/skills/kirilxd/claude-tutor/quiz"><img src="https://agentmods.dev/badge/skills/kirilxd/claude-tutor/quiz/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.
<a href="https://agentmods.dev/skills/kirilxd/claude-tutor/quiz"><img src="https://agentmods.dev/badge/skills/kirilxd/claude-tutor/quiz.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Rogue Agent · line 25 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
- medium Rogue Agent · line 125 Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00077 | $0.02764 |
| Opus 5 | $0.00039 | $0.01382 |
| Sonnet 5 | $0.00015 | $0.00553 |
| Haiku 4.5 | $0.00008 | $0.00276 |
Grade A, and why
quiz 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 233 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Quiz — Interactive Knowledge Testing
ALWAYS use the AskUserQuestion tool when asking the user questions, in any context. If you have too many questions for the tool, split them up into multiple calls.
Generate and deliver mixed-format quiz questions based on the user's learning plan. Ask one question at a time, give immediate feedback, track scores, and adapt difficulty based on prior performance.
File Storage Rules — EXACT PATHS (no deviation)
Quiz progress is saved to ONE specific directory:
~/.claude/learning/progress/{topic-slug}.json
CORRECT path for quiz progress: ~/.claude/learning/progress/dns.json
WRONG path for quiz progress: ~/.claude/learning/plans/dns-2026-03-29.json
CORRECT — saving any learning data: ~/.claude/learning/progress/dns.json
WRONG — saving to project directory: ./learning/progress/dns.json
Always use the ABSOLUTE path ~/.claude/learning/ — never a relative path like ./learning/.
Never write quiz data (quizzes, weakAreas, strongAreas, spacedRepetition, overallScore) to plan files.
Never add extra fields beyond those defined in Step 6's schema.
Verify the path contains /progress/ before writing.
Process
Step 1: Determine Topic & Module
If the user specified a topic (e.g., /quiz kubernetes):
- Read
~/.claude/learning/index.json - Find matching topic (fuzzy match: "k8s" → "kubernetes", "Spanish" → "spanish-grammar")
- If ambiguous, ask the user to clarify
If no topic specified (just /quiz):
- Read index.json, find topic with most recent
lastActivity - Confirm with user: "Quiz you on [topic]?"
If no learning plans exist:
- Tell the user: "No learning plans found. Use /learn to create one first, or tell me a topic and I'll quiz you on general knowledge."
- If user provides a topic without a plan, generate questions from Claude's knowledge (no plan file needed)
Module targeting:
- If user says "test me on module 2" or "quiz me on deployments", target that specific module
- Otherwise, quiz across all modules, weighting toward weak areas if prior quiz data exists
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.
- 9d ago First seen · 233 lines · 77 tokens per session scan A 10953e15dc3c
quiz is a skill published in the GitHub repository kirilxd/claude-tutor (123 stars, last pushed 1mo ago), licensed MIT. It adds 77 tokens to every session and 2,764 once invoked, about $0.0004 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.
Other skills, from other repositories
tutor
Use when the user wants to learn, study, or understand a topic — triggered by requests to teach, tutor, explain concepts, quiz, drill, or build understanding of any subject.
reading-metaskill
A reading and learning guide based on building a regular reading habit, choosing books, and understanding difficult subjects through original works and explanation.
textbook-distillation
Turn a textbook or long-form source into a self-paced learning track: chapter map, lesson plan, then self-contained HTML lecture notes (styled as the human specifies) with worked examples, exercises, and checkpoint questions. Read this for "lecture notes" / "study notes" / "course" / "syllabus" requests from a…
learning-and-development
Builds capability — skills gaps, career frameworks, training that transfers to the job, and internal mobility. Use this to design a career ladder, close a capability gap, decide whether to build or hire a skill, structure onboarding into a role, or work out why training keeps failing to change anything.
learning-notes-automation
A workflow for turning videos, podcasts, and articles into structured learning notes. It extracts key ideas and creates flashcards that can be imported into Anki, a spaced-repetition study app.
diagnose
A short question-based assessment of a pilot's current skill level. It produces a profile and saves it in the connected browser or database.