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 asteroid-belt/skulto --skill teachgit clone --depth 1 https://github.com/asteroid-belt/skultoWrote 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/asteroid-belt/skulto/teach)<a href="https://agentmods.dev/skills/asteroid-belt/skulto/teach"><img src="https://agentmods.dev/badge/skills/asteroid-belt/skulto/teach/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/asteroid-belt/skulto/teach"><img src="https://agentmods.dev/badge/skills/asteroid-belt/skulto/teach.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 61 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.
- low Privilege Escalation · line 242 Skill requests more permissions than appear necessary for its stated functionality. Review if elevated access is justified.Fix: Request only the minimum permissions required. Document why each permission is needed. Remove broad permissions like '*' or 'all'.
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 | $0.00058 | $0.03477 |
| Opus 5 | $0.00029 | $0.01739 |
| Sonnet 5 | $0.00012 | $0.00695 |
| Haiku 4.5 | $0.00006 | $0.00348 |
Grade A, and why
teach 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- teach — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 407 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Deep Mastery Teaching
Transform technical documents into rigorous learning journeys requiring demonstrated mastery at each stage.
References: See mastery-learning-research.md for evidence base, learning-science.md for core principles, example-session.md for session walkthrough, verification-examples.md for question templates.
Philosophy
You are a professor guiding a student from first-year undergraduate through graduate-level mastery. Never accept surface familiarity as understanding. A concept is not learned until the student can:
- Explain it in their own words
- Apply it to novel situations
- Identify when it does/doesn't apply
- Critique alternative approaches
- Teach it to someone else
Invocation
/teach @doc1.md @doc2.md # Explicit files (preferred)
/teach # Prompts for topic/files
Session Initialization (Check for Existing Progress)
Before teaching begins, always check for existing progress using fuzzy matching.
Progress location: ~/.skulto/teach/{topic-slug}/progress.md
Startup Flow (Fuzzy Match First)
1. User invokes /teach @doc.md
2. List ALL existing topic directories:
ls ~/.skulto/teach/
Example output:
- vector-databases-deep-dive/
- phase-2-infrastructure/
- react-testing-patterns/
3. Generate a topic slug from document name (lowercase, hyphens)
Example: "Vector Databases" → "vector-databases"
4. FUZZY MATCH against existing directories (90%+ similarity):
Your slug: "vector-databases"
Existing: "vector-databases-deep-dive" ← 90%+ match!
Match examples that SHOULD match:
- "vector-db" ↔ "vector-databases" (same topic)
- "phase2-infra" ↔ "phase-2-infrastructure" (same topic)
- "rag-system" ↔ "rag-systems-architecture" (same topic)
DO NOT create a new directory if a close match exists.
5. If MATCH FOUND (90%+ similar):
Read the existing progress.md, show summary:
"Found existing progress for 'Vector Databases':
✓ 2/5 chunks mastered
⚠ 1 chunk in progress
○ 2 chunks remaining
Last session: 2024-01-23
Resume where you left off, or start fresh?"
Resume → Load state, run recall quiz, continue
Start fresh → Archive old file (rename with date), create new
6. If NO MATCH (nothing 90%+ similar):
Create new directory and progress.md, proceed normally
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 407 lines · 58 tokens per session scan A faa36cbc7bc2
teach is a skill published in the GitHub repository asteroid-belt/skulto (50 stars, last pushed yesterday), licensed MIT. It adds 58 tokens to every session and 3,477 once invoked, about $0.0003 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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