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 YujxZJCN/teaching-skills --skill lesson-buildergit clone --depth 1 https://github.com/YujxZJCN/teaching-skillsWrote 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/yujxzjcn/teaching-skills/lesson-builder)<a href="https://agentmods.dev/skills/yujxzjcn/teaching-skills/lesson-builder"><img src="https://agentmods.dev/badge/skills/yujxzjcn/teaching-skills/lesson-builder/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/yujxzjcn/teaching-skills/lesson-builder"><img src="https://agentmods.dev/badge/skills/yujxzjcn/teaching-skills/lesson-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00134 | $0.02159 |
| Opus 5.5 | $0.00054 | $0.00864 |
| Sonnet 5.5 | $0.00027 | $0.00432 |
| Haiku 4.5 | $0.00013 | $0.00216 |
Grade A, and why
lesson-builder 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 21d 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 — 152 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Lesson Builder — Class-Meeting Materials Team
Builds the materials a professor actually walks into class with, from the design the pipeline already confirmed: passport schedule weeks in, lesson packages out. The professor brings the discipline content and knowledge of the room; this skill brings lesson structure, active-learning craft, and tireless drafting — and it marks every domain claim it cannot vouch for instead of sounding confident.
Prime rule: a lesson serves the week's outcomes, not the other way around. If the professor asks for materials on a topic mapped to no outcome, build them — and flag the orphan once (Pedagogy Foundations §2), then let the professor decide.
Quick Start
Build my Week 5 class on hash tables — 80 students, 75 minutes
帮我准备下周二的课，主题是回归分析，需要教案和课件大纲
I need an in-class activity for recursion that works with 120 students in fixed seating
Turn Week 9 into a flipped session: video spec + in-class problem session
Write a teaching case on a product-recall decision for my operations course
Modes
| Mode | Trigger intent | Output |
|---|---|---|
full |
"Prepare my class on X" / "build Week N" for one meeting | Complete package: lesson plan + lecture notes + slide outline + activity sheets |
lecture-notes |
"Write lecture notes / 讲稿 on…" | Full prose lecture notes with worked examples and speaker asides |
slides-outline |
"Make slides for…" | Slide-by-slide outline (assertion titles, figure specs) — not finished slides |
activities |
"I need an activity / make this interactive" | Active-learning activity design(s) with sheets and instructor logistics |
case-study |
"Write a teaching case on…" | Teaching case + teaching notes (discussion arc, board plan) |
discussion-guide |
"Discussion questions for…" / seminar prep | Question ladder + facilitation guide + async variant |
flipped |
"Flip this class" / pre-class video + in-class work | Pre-class material spec + in-class application session plan |
week-batch |
"Build Weeks 3–6" / pipeline Stage 2 run | full packages for each meeting in the range, one checkpoint per week |
What ships with it
10 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.
- agents/activity_designer_agent.md 3.6 KB
- agents/case_study_writer_agent.md 3.8 KB
- agents/discussion_designer_agent.md 4.1 KB
- agents/lecture_writer_agent.md 3.7 KB
- agents/lesson_planner_agent.md 3.7 KB
- agents/slide_outliner_agent.md 3.7 KB
- references/active_learning_catalog.md 12 KB
- references/lesson_anatomy.md 5.4 KB
- templates/activity_sheet_template.md 2.3 KB
- templates/lesson_plan_template.md 2.1 KB
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.
- 21d ago First seen · 152 lines · 134 tokens per session scan A 203e98006386
lesson-builder is a skill published in the GitHub repository YujxZJCN/teaching-skills (41 stars, last pushed 22d ago), licensed MIT. It adds 134 tokens to every session and 2,159 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-10-04.
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