Agent skill

Lc Site Data

by yennanliu in yennanliu/CS_basics

Add a topic to the Study Roadmap (data/roadmap.json) or a question to the Complexity Quiz (data/complexityquiz.json), satisfying the build-time validators in one pass — a row strictly below every…

No licenceAuto-check: notesEducation

Install Lc Site Data

skills CLI
$ npx skills add yennanliu/CS_basics --skill lc-site-data -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install yennanliu/CS_basics lc-site-data --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/yennanliu/CS_basics.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/lc-site-data .claude/skills/lc-site-data && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
lc-site-data
GitHub stars
141
Token cost
~2.3k tokens
SKILL.md length
1,115 words
Files
1
Skills in repo
16
Repo updated
First seen
Licence
None found

At a glance

Add a topic to the Study Roadmap (data/roadmap.json) or a question to the Complexity Quiz (data/complexityquiz.json), satisfying the build-time validators in one pass — a row strictly below every…

  • Works in 5 steps: Check what already exists → Write the entry → Build — the validator is the test → …
  • Asked to add a roadmap topic
  • SKILL.md covers Why this one is a skill, Part A — a roadmap topic, Part B — a quiz question and The steps, plus 2 more sections
  • Calls python3, bash and node

What it does

Lc Site Data is an agent skill from yennanliu/CS_basics. Add a topic to the Study Roadmap (data/roadmap.json) or a question to the Complexity Quiz (data/complexityquiz.json), satisfying the build-time validators in one pass — a row strictly below every prereq, no cycle and no edge the graph already implies, sheet slugs and LC numbers that exist, no duplicate quiz id, accept always an array, and every answer parseable by site/complexity.js's single-letter identifiers. Use when asked to add a roadmap topic, wire a topic's prerequisites, add a complexity question or…

Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Education. The repository describes itself as: My CS learning : algorithm, data structure, and system design | SE.

When your agent uses it

  • Asked to add a roadmap topic
  • Wire a topics prerequisites
  • Add a complexity question
  • Fix a build that a roadmap

Example prompts

  • “add monotonic stack to the roadmap”
  • “/lc-site-data quiz for LC 239”
  • “add a complexity question”
  • “/lc-site-data”

Requirements

  • Python 3
  • Pre-approved tools (allowed-tools): Read, Glob, Grep, Bash, Write, Edit

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Check what already exists
  2. Write the entry
  3. Build — the validator is the test
  4. Check the page, then gate
  5. Report

What it can do on your machine

Read from SKILL.md and the folder at commit cb6b21b. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Glob
    • Grep
    • Bash
    • Write
    • Edit

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • python3
    • bash
    • node
    • npm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npm, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Lc Site Data loads about 2.3k tokens when it runs. Until then it costs about 182 tokens; SKILL.md has 1,115 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~182
When it runs · the whole SKILL.md, loaded when a task matches
~2.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Glob, Grep, Bash, Write, Edit

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 1,115 words (~2,313 tokens).

“Edit data/roadmap.json or data/complexity_quiz.json so the build accepts it the first time.”

— opening of SKILL.md by yennanliu
name
lc-site-data
allowed-tools
Read, Glob, Grep, Bash, Write, Edit

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/lc-site-data of yennanliu/CS_basics.

Open the folder on GitHubat commit cb6b21b

Compare with similar skills

Lc Site Data next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Lc Site Data compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Lc Site Data this skillyennanliu/CS_basics141—~2.3kAutomated safety check: NotesNone
DeepTutor CLIHKUDS/DeepTutor41k—~2.8kAutomated safety check: PassApache-2.0
AI Engineering Placement Quizrohitg00/ai-engineering-from-scratch66k—~2kAutomated safety check: PassMIT
Deep Reading Analystginobefun/deep-reading-analyst-skill3544 repos~3.6kAutomated safety check: PassMIT
OpenMAIC Setup and ExtensionTHU-MAIC/OpenMAIC40k—~1.7kAutomated safety check: NotesMIT
Codebase to Coursezarazhangrui/codebase-to-course5.7k—~4.4kAutomated safety check: PassNone

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  • Lc Cheatsheet

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Categories

Questions about Lc Site Data

What does Lc Site Data do?

Add a topic to the Study Roadmap (data/roadmap.json) or a question to the Complexity Quiz (data/complexityquiz.json), satisfying the build-time validators in one pass — a row strictly below every…. Lc Site Data is an agent skill from yennanliu/CS_basics.js's single-letter identifiers.

When should I use Lc Site Data?

Lc Site Data fits situations like: asked to add a roadmap topic; wire a topics prerequisites; add a complexity question; fix a build that a roadmap.

How do I install Lc Site Data in Claude Code?

Run `npx skills add yennanliu/CS_basics --skill lc-site-data -a claude-code`. Or copy the skill folder (.claude/skills/lc-site-data in yennanliu/CS_basics) into .claude/skills/lc-site-data in your project. Claude Code loads it when a task matches its description.

How do I install Lc Site Data in Codex?

Run `npx skills add yennanliu/CS_basics --skill lc-site-data -a codex`. Or copy the skill folder (.claude/skills/lc-site-data in yennanliu/CS_basics) into .agents/skills/lc-site-data in your project. Codex loads it when a task matches its description.

Can I use Lc Site Data in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add yennanliu/CS_basics --skill lc-site-data -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/lc-site-data, .gemini/skills/lc-site-data, .github/skills/lc-site-data and .opencode/skills/lc-site-data in your project.

What does Lc Site Data need to run?

Going by SKILL.md and its folder, Lc Site Data needs the command-line tools its instructions call (python3, bash, node and npm). Our summary lists: Python 3. Its frontmatter pre-approves these tools: Read, Glob, Grep, Bash, Write, Edit.

Does Lc Site Data access the network?

SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Lc Site Data safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Lc Site Data use?

No licence was found for Lc Site Data or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Lc Site Data use?

About 2.3k tokens (SKILL.md is roughly 9.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Lc Site Data?

Skills that share tags, products or a category with Lc Site Data: DeepTutor CLI (HKUDS/DeepTutor, 41k stars), AI Engineering Placement Quiz (rohitg00/ai-engineering-from-scratch, 66k stars), Deep Reading Analyst (ginobefun/deep-reading-analyst-skill, 354 stars) and OpenMAIC Setup and Extension (THU-MAIC/OpenMAIC, 40k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Lc Site Data?

yennanliu (a GitHub user) maintains it in yennanliu/CS_basics, which has 141 GitHub stars. The repository holds 16 skills in this directory. The repository was last updated on October 10, 2026.

Source: yennanliu/CS_basics on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.