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.
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.
curl -O https://raw.githubusercontent.com/rohitg00/ai-engineering-from-scratch/main/.claude/skills/claude-certification/SKILL.mdgit clone --depth 1 https://github.com/rohitg00/ai-engineering-from-scratchWrote 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/rohitg00/ai-engineering-from-scratch/claude-certification)<a href="https://agentmods.dev/skills/rohitg00/ai-engineering-from-scratch/claude-certification"><img src="https://agentmods.dev/badge/skills/rohitg00/ai-engineering-from-scratch/claude-certification/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/rohitg00/ai-engineering-from-scratch/claude-certification"><img src="https://agentmods.dev/badge/skills/rohitg00/ai-engineering-from-scratch/claude-certification.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk fail
- NVIDIA SkillSpector pass
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 | $0.00109 | $0.02620 |
| Opus 5 | $0.00055 | $0.01310 |
| Sonnet 5 | $0.00022 | $0.00524 |
| Haiku 4.5 | $0.00011 | $0.00262 |
Grade A, and why
claude-certification 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 — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Certification Tutor
Turn the repository into a step-by-step tutor. Make the learner explain, predict, run, build, and defend each decision. Do not reduce the course to a reading list.
One invocation handles one of four modes: onboarding, one lesson, an
assessment, or remediation. Resume from CLAUDE-CERTIFICATION.md when it
exists.
Load the source of truth
Prefer a local clone. Locate the nearest parent containing
certifications/claude/program.json. Otherwise read files from:
https://raw.githubusercontent.com/rohitg00/ai-engineering-from-scratch/main/<path>
Read these files as needed:
- Program policy and current verification date:
certifications/claude/program.json - Ordered route and domain map:
certifications/claude/tracks/<exam-code>.json - Lesson:
<lesson-path>/docs/en.md - Scenario runner or validator:
<lesson-path>/code/main.py - Tests:
<lesson-path>/code/tests/test_*.py - Reference artifact:
<lesson-path>/outputs/ - Lesson quiz:
<lesson-path>/quiz.json - Diagnostic and mock: the
assessmentspaths declared by the track
Read the selected track JSON at the start of every session. Its lessons
array is the route order. Do not invent a route, lesson, domain weight, exam
fact, or official policy from memory.
The website is an optional interactive view, not a dependency:
https://aiengineeringfromscratch.com/certifications.html
GitHub learners must be able to complete the full tutor loop without opening the website. Certification lessons are maintained for GitHub and the website; do not send them through the repository's book-generation pipeline.
Select the mode
- If the learner requests a diagnostic, mock, or domain review, use Assessment mode.
- If
CLAUDE-CERTIFICATION.mdexists, use Lesson mode for the first unfinished route lesson unless the learner names another lesson. - If state is missing, use Onboarding mode.
- If the learner names one lesson without wanting a plan, teach it in Lesson mode and do not create state unless they approve.
What ships with it
1 file 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 · 289 lines · 109 tokens per session scan A 88c0ebd8c3b0
claude-certification is a skill published in the GitHub repository rohitg00/ai-engineering-from-scratch (52,899 stars, last pushed yesterday), licensed MIT. It adds 109 tokens to every session and 2,620 once invoked, about $0.0005 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
playwright
Use when the task requires capturing or automating a real browser from the terminal.
eli5
Explain concepts in very simple terms suitable for a five-year-old.
deck-course-module
A course or workshop slide template with persistent learning goals, teaching pages, multiple-choice self-tests, and a wrap-up.
stride-analysis-patterns
Apply STRIDE methodology to systematically identify threats. Use when analyzing system security, conducting threat modeling sessions, or creating security documentation.
prompts-chat
Use when searching, installing, or improving AI skills and prompts via prompts.chat or skills.sh. Triggers on skill search, prompt lookup, install skill, improve prompt, prompts.chat.
transformer-attention
Use when reasoning about Transformer self-attention, multi-head attention, positional encoding, masked decoder attention, or why attention replaced recurrence/convolutions in sequence models; not for generic NLP or unrelated attention topics.