yann-lecun

yann-lecun is a skill for Claude Code, Codex from K-Dense-AI/mimeographs. It costs 127 tokens per session (1,464 once invoked), scanned A, a copy of yann-lecun, MIT.

A reasoning guide based on AI researcher Yann LeCun’s views on deep learning, language models, and machine intelligence. It emphasizes learning useful models of the physical world and building systems through practical engineering.

In plain words
What is it for?
Use it when evaluating AI architectures, language-model limits, self-supervised learning, open research, or machines that interact with the physical world.
Why use it?
It helps compare AI approaches without assuming that one method solves every problem.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when evaluating AI architectures, language-model limits, self-supervised learning, open research, or machines that interact with the physical world.

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Install with agentmods
npx agentmods add skills/k-dense-ai/mimeographs/yann-lecun
Install

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.

Any agent
npx skills add K-Dense-AI/mimeographs --skill yann-lecun
Clone the repo
git clone --depth 1 https://github.com/K-Dense-AI/mimeographs

Made for: Claude Code, Codex.

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 yann-lecun

README.md
[![agentmods](https://agentmods.dev/badge/skills/k-dense-ai/mimeographs/yann-lecun/github.svg)](https://agentmods.dev/skills/k-dense-ai/mimeographs/yann-lecun)
Your own site
<a href="https://agentmods.dev/skills/k-dense-ai/mimeographs/yann-lecun"><img src="https://agentmods.dev/badge/skills/k-dense-ai/mimeographs/yann-lecun/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 yann-lecun

Your own site · 80×15
<a href="https://agentmods.dev/skills/k-dense-ai/mimeographs/yann-lecun"><img src="https://agentmods.dev/badge/skills/k-dense-ai/mimeographs/yann-lecun.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 127 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,464 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.
Origin 100% copy Near-identical to another mod 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 $0.00127 $0.01464
Opus 5 $0.00063 $0.00732
Sonnet 5 $0.00025 $0.00293
Haiku 4.5 $0.00013 $0.00146

Measured 8d ago against content hash ac12e22e54bc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

yann-lecun 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 8d 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.

Origin

This is a copy

100% identical to yann-lecun — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

mimeographs/yann-lecun/SKILL.md · 76 lines

How it starts

The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Thinking like Yann LeCun

Yann LeCun is a Turing Award-winning AI researcher, Chief AI Scientist at Meta, and a founding father of deep learning and Convolutional Neural Networks. His thinking is defined by a rigorous, physics-grounded approach to intelligence that sharply contrasts with the current hype surrounding autoregressive Large Language Models (LLMs). He views intelligence not as the ability to manipulate discrete text tokens, but as the ability to build predictive models of a complex, continuous physical reality.

LeCun's signature shape of reasoning is deeply pragmatic and evolutionary. He dismisses "magic bullets" and sudden "hard takeoff" scenarios in favor of iterative, objective-driven engineering. He champions open-source research as a democratic imperative and views self-supervised learning as the bedrock of true machine intelligence.

Reach for this skill whenever you're evaluating the long-term viability of AI architectures, debating AI safety and open-source policy, or designing systems that need to reason, plan, and interact with the physical world.

Core principles

  • Intelligence Requires Physical Grounding: True common sense comes from high-bandwidth observation of the physical world, not low-bandwidth language.
  • Autoregressive LLMs Cannot Achieve AGI: Scaling text-based models is a dead end for human-level intelligence because they lack persistent memory, planning, and physical intuition.
  • Self-Supervised Learning is the Foundation: Intelligent agents discover the structure of the world primarily by observing it and predicting missing information, not through explicit labels or sparse rewards.
  • Predict in Abstract Representation Space: World models should predict abstract representations of future states, filtering out unpredictable noise rather than trying to reconstruct exact raw pixels.
  • Open Research and Open-Source AI are Essential: Sharing foundation models is necessary to accelerate progress, prevent corporate monopolies, and preserve global cultural diversity.

Read the full file on GitHub · 76 lines

Files

What ships with it

60 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.

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. 8d ago First seen · 76 lines · 127 tokens per session scan A ac12e22e54bc

Subscribe to this mod's changes

yann-lecun is a skill published in the GitHub repository K-Dense-AI/mimeographs (123 stars, last pushed 24d ago), licensed MIT. It adds 127 tokens to every session and 1,464 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to yann-lecun, differing in 2 lines, and is treated as a copy.

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