lean-research-library

lean-research-library is a skill for Claude Code, Codex from hoanganhduc/ai-agents-skills. It costs 64 tokens per session (1,754 once invoked), scanned A, original, GPL-3.0.

A workflow for Lean formalization, where mathematical statements are written and checked by a computer. It reuses Mathlib, a large library of verified mathematics, and a personal research library.

In plain words
What is it for?
Use it at the start and end of Lean mathematics tasks, and when creating or publishing paper-related artifacts from the provided template.
Why use it?
It helps avoid reproving existing results and provides checks for preserving useful work in the research library after a task is finished.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it at the start and end of Lean mathematics tasks, and when creating or publishing paper-related artifacts from the provided template.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hoanganhduc/ai-agents-skills/lean-research-library
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 hoanganhduc/ai-agents-skills --skill lean-research-library
Clone the repo
git clone --depth 1 https://github.com/hoanganhduc/ai-agents-skills

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 lean-research-library

README.md
[![agentmods](https://agentmods.dev/badge/skills/hoanganhduc/ai-agents-skills/lean-research-library/github.svg)](https://agentmods.dev/skills/hoanganhduc/ai-agents-skills/lean-research-library)
Your own site
<a href="https://agentmods.dev/skills/hoanganhduc/ai-agents-skills/lean-research-library"><img src="https://agentmods.dev/badge/skills/hoanganhduc/ai-agents-skills/lean-research-library/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 lean-research-library

Your own site · 80×15
<a href="https://agentmods.dev/skills/hoanganhduc/ai-agents-skills/lean-research-library"><img src="https://agentmods.dev/badge/skills/hoanganhduc/ai-agents-skills/lean-research-library.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,754 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 unknown 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 $0.00064 $0.01754
Opus 5 $0.00032 $0.00877
Sonnet 5 $0.00013 $0.00351
Haiku 4.5 $0.00006 $0.00175

Measured 11d ago against content hash daeb838950ed, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

lean-research-library 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 11d 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.

canonical/skills/lean-research-library/SKILL.md · 100 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 11d ago First seen · 100 lines · 64 tokens per session scan A daeb838950ed

Subscribe to this mod's changes

lean-research-library is a skill published in the GitHub repository hoanganhduc/ai-agents-skills (2 stars, last pushed yesterday), licensed GPL-3.0. It adds 64 tokens to every session and 1,754 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 2026-08-31.

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