ai-engineering-from-scratch: Skill for Claude Code

.claude/skills/learn/SKILL.md

learn is a skill for Claude Code from rohitg00/ai-engineering-from-scratch. It costs 80 tokens per session (2,789 once invoked), scanned A, original, MIT.

An interactive tutor for the AI Engineering from Scratch course, which covers topics from mathematics to autonomous AI agents. It teaches one lesson at a time, quizzes you, and records your progress.

In plain words
What is it for?
Use it to take the next lesson, practise by answering questions and running exercises, and continue from your saved study plan.
Why use it?
It turns a large course into manageable sessions and prevents your progress from being lost.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions Claude Code; mentions Codex.

This is rohitg00/ai-engineering-from-scratch's own configuration. It tells Claude Code how to work on ai-engineering-from-scratch itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ai-engineering-from-scratch configures →

About the project

AI Engineering from Scratch is a free, open-source curriculum that teaches people to build AI systems through lessons and reusable artifacts such as prompts, skills, agents, and MCP servers. It is for learners who want practical foundations or want to create AI applications, and the catalogue skills support parts of that curriculum.

rohitg00/ai-engineering-from-scratch · 77,007 stars · on GitHub · aiengineeringfromscratch.com

Reuse

Borrowing it

Nothing to install: this file belongs to rohitg00/ai-engineering-from-scratch. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/rohitg00/ai-engineering-from-scratch/main/.claude/skills/learn/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/rohitg00/ai-engineering-from-scratch

Made for: Claude Code.

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 learn

README.md
[![agentmods](https://agentmods.dev/badge/skills/rohitg00/ai-engineering-from-scratch/learn/github.svg)](https://agentmods.dev/skills/rohitg00/ai-engineering-from-scratch/learn)
Your own site
<a href="https://agentmods.dev/skills/rohitg00/ai-engineering-from-scratch/learn"><img src="https://agentmods.dev/badge/skills/rohitg00/ai-engineering-from-scratch/learn/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 learn

Your own site · 80×15
<a href="https://agentmods.dev/skills/rohitg00/ai-engineering-from-scratch/learn"><img src="https://agentmods.dev/badge/skills/rohitg00/ai-engineering-from-scratch/learn.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 80 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,789 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. Third-party audits
  • Socket pass 4 Nov 2026
  • Snyk warn 4 Nov 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00080 $0.02789
Opus 5.5 $0.00032 $0.01116
Sonnet 5.5 $0.00016 $0.00558
Haiku 4.5 $0.00008 $0.00279

Measured 2d ago against content hash cac36d0d99cd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

learn 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 2d 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.

.claude/skills/learn/SKILL.md · 233 lines

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.

Learn

You are the tutor for the AI Engineering from Scratch curriculum. One invocation = one lesson, taught interactively: the learner should type, answer, and run things — never just scroll. Works with any agent.

Host invocation contract

Skill names are portable, but invocation syntax belongs to the host. Render every suggested next action in the correct form:

  • Codex: learn, start-learning, check-understanding 13, and other skill-name forms, or tell the learner to choose the skill from /skills.
  • Claude Code: /learn, /start-learning, /check-understanding 13, and other /skill-name forms.
  • Other compatible hosts: natural language such as Use start-learning to build my course plan. or Use check-understanding to quiz me on Phase 13.

Never present a slash command as universal syntax. If the host is unknown, use the natural-language form.

Content sources

Prefer local files when the repo is cloned (a phases/ directory exists in or above the current directory). Otherwise fetch from:

https://raw.githubusercontent.com/rohitg00/ai-engineering-from-scratch/main/<path>
  • Lesson text: phases/<phase-dir>/<lesson-dir>/docs/en.md
  • Lesson quiz: phases/<phase-dir>/<lesson-dir>/quiz.json
  • Lesson list for a phase: the Contents section of README.md (each phase's table lists every lesson with its directory path and title)

Resume routing across course modes

Before Step 0, resolve every "resume" or "continue" request against these supported state files and their route owners:

  • LEARNING.md belongs to learn for the full curriculum.
  • MCP-LEARNING.md belongs to learn-mcp for the Model Context Protocol (MCP) route.
  • MCP-ENGINEERING-LEARNING.md is the legacy filename for that same learn-mcp route, not a separate route.
  • AGENT-SKILLS-LEARNING.md belongs to learn-agent-skills.
  • REVERSE-ENGINEERING-LEARNING.md belongs to learn-reverse-engineering.
  • CLAUDE-CERTIFICATION.md belongs to claude-certification.
  • INTERVIEW-LEARNING.md belongs to interview-prep for interview practice.

Read the full file on GitHub · 233 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. 2d ago Changed · +1 lines cac36d0d99cd
  2. 7d ago Changed · +38 lines df0756075de6
  3. 23d ago Changed · +11 lines 2206632ab94a
  4. 2mo ago First seen · 183 lines · 80 tokens per session scan A 48595700a457

Subscribe to this mod's changes

learn is a skill published in the GitHub repository rohitg00/ai-engineering-from-scratch (77,007 stars, last pushed yesterday), licensed MIT. It adds 80 tokens to every session and 2,789 once invoked, about $0.0003 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 2026-08-30.

Related

learn compared with skills from other repositories

learn next to 6 skills from other repositories
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learnrohitg00/ai-engineering-from-scratchSkill77kyesterdayMITA80Claude Code
course-builderericrisco/rsc-harnessSkill5032d agoMITA76Claude Code, Codex
ai-engineering-curriculumoyi77/1ai-skillsSkill17yesterdayMITA50Claude Code
Course Creatoreddiebelaval/squireSkill212mo agoMITA13Claude Code, Codex
Course Creatorjmsktm/claude-settingsSkill109mo agononeA13Claude Code, Codex
playwrightopenai/openai-agents-pythonSkill31ktodayMITA19Claude Code, Codex
show-mehumanlayer/humanlayerSkill13kyesterdayApache-2.0A25Claude Code