Official agent skill

Principle Explain The Number

by cursor in cursor/plugins

Apply before you trust, report, or act on a number you measured: a speedup, a regression, a throughput, a latency, or an eval result.

OfficialNo licenceAuto-check passed

Install Principle Explain The Number

skills CLI
$ npx skills add cursor/plugins --skill principle-explain-the-number -a claude-code

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

GitHub CLI
$ gh skill install cursor/plugins principle-explain-the-number --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/cursor/plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/pstack/skills/principle-explain-the-number .claude/skills/principle-explain-the-number && 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
principle-explain-the-number
GitHub stars
10k
Used in
3 other repos
Token cost
~528 tokens
SKILL.md length
315 words
Files
1
Skills in repo
99
Repo updated
First seen
Licence
None found

At a glance

Apply before you trust, report, or act on a number you measured: a speedup, a regression, a throughput, a latency, or an eval result.

  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Principle Explain The Number is an agent skill from cursor/plugins, published by the product's own GitHub organization. Apply before you trust, report, or act on a number you measured: a speedup, a regression, a throughput, a latency, or an eval result. Find what limits it, and rule out that it measured something other than the work you think.

Its SKILL.md is about 530 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Cursor plugin specification and official plugins.

Example prompts

  • “/principle-explain-the-number”

What it can do on your machine

Read from SKILL.md and the folder at commit ccb5507. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

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

  • Network

    No URLs in SKILL.md.

    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

Principle Explain The Number loads about 528 tokens when it runs. Until then it costs about 64 tokens; SKILL.md has 315 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~64
When it runs · the whole SKILL.md, loaded when a task matches
~528

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 passed

The automated check found no risky patterns in SKILL.md.

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 315 words (~528 tokens).

“A measured number is a claim about a system. Before you trust it, report it, or act on it, find what limits it and rule out that it measured something else.”

— opening of SKILL.md by cursor
name
principle-explain-the-number
disable-model-invocation
true

Read the full SKILL.md on GitHub

Files

Just SKILL.md in pstack/skills/principle-explain-the-number of cursor/plugins.

Open the folder on GitHubat commit ccb5507

Used in 3 other repositories

We found 3 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 3 other GitHub owners. This page covers the copy in cursor/plugins, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Principle Explain The Number 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.

Principle Explain The Number compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Principle Explain The Number this skillcursor/plugins10k3 repos~528Automated safety check: PassNone
Explain Usageasgeirtj/system_prompts_leaks69k—~345Automated safety check: PassCC0-1.0
Implementing Zero Trust In Cloudmukul975/Anthropic-Cybersecurity-Skills34k—~3.3kAutomated safety check: PassApache-2.0
Zero Trustsickn33/agentic-awesome-skills47k2 repos~3.2kAutomated safety check: PassMIT
Uxui Principlessickn33/agentic-awesome-skills47k2 repos~548Automated safety check: PassMIT
Logic Explainsickn33/agentic-awesome-skills47k1 repos~894Automated safety check: PassMIT

Similar skills

  • Explain Usage

    asgeirtj/system_prompts_leaks

    Explain where this session's tokens went, with one simple chart in plain language.

    69k GitHub stars~345 tokensUpdated today
    Writing & ContentAuto-check passed
  • Implementing Zero Trust In Cloud

    mukul975/Anthropic-Cybersecurity-Skills

    Guides zero trust implementation across AWS, Azure, and GCP per NIST SP 800-207 and BeyondCorp principles, covering identity-centric access, micro-segmentation, continuous verification, device trust…

    34k GitHub stars~3.3k tokensUpdated 1 mo ago
    DevOps & CloudAuto-check passed
  • Zero Trust

    sickn33/agentic-awesome-skills

    Implement zero-trust network architecture. An agent skill from sickn33/agentic-awesome-skills.

    47k GitHub starsUsed in 2 repos~3.2k tokens
    Backend & APIsAuto-check passed
  • Uxui Principles

    sickn33/agentic-awesome-skills

    Evaluate interfaces against 168 research-backed UX/UI principles, detect antipatterns, and inject UX context into AI coding sessions.

    47k GitHub starsUsed in 2 repos~548 tokens
    Auto-check passed
  • Logic Explain

    sickn33/agentic-awesome-skills

    Explain what a specific piece of code actually does for a given input by producing a step-by-step execution trace (interprocedural, with name resolution and type transitions).

    47k GitHub starsUsed in 1 repo~894 tokens
    Auto-check passed
  • Faceless Explainer Video

    heygen-com/hyperframes

    Turns an article, notes or a topic brief into an explainer video whose visuals are invented per scene, built frame by frame in HyperFrames with no footage.

    59k GitHub starsUsed in 3 repos~7.7k tokens
    Media & CreativeAuto-check: notes

More from cursor/plugins

All 99 skills in this repo
  • Official

    Keeps a TSV decision log for long or unattended agent runs, one row per decision with what, why, evidence and result, so a reviewer can check the work later.

    10k GitHub starsUsed in 9 repos~1.6k tokens
    Auto-check passed
  • Official

    Digs into why code is shaped the way it is by checking git history, pull requests and connected tools in parallel, then reporting a cited read on the tradeoffs.

    10k GitHub starsUsed in 9 repos~2.6k tokens
    Auto-check passed
  • Official

    Starts three parallel reviewer subagents over the current conversation transcript, then turns their findings into concrete edits to existing skills.

    10k GitHub starsUsed in 5 repos~1.2k tokens
    Auto-check passed
  • Official

    Applies four layers of technical-writing rules to docs, RFCs, readmes, PR descriptions and commit messages so a tired engineer follows them on the first read.

    10k GitHub starsUsed in 10 repos~2.4k tokens
    Auto-check passed
  • Advisor Mode

    cursor/plugins

    Official

    Adds a second, stronger model that the main agent consults before major decisions, when stuck and before finishing, controlled by /advisor commands.

    10k GitHub stars~2.6k tokensUpdated today
    Auto-check: notes
  • Official

    Prepare PRs for review by cleaning noisy history, improving PR descriptions, and adding reviewer guidance without changing code behavior.

    10k GitHub starsUsed in 3 repos~569 tokens
    Auto-check passed

Questions about Principle Explain The Number

What does Principle Explain The Number do?

Apply before you trust, report, or act on a number you measured: a speedup, a regression, a throughput, a latency, or an eval result. Principle Explain The Number is an agent skill from cursor/plugins, published by the product's own GitHub organization. Apply before you trust, report, or act on a number you measured: a speedup, a regression, a throughput, a latency, or an eval result.

How do I install Principle Explain The Number in Claude Code?

Run `npx skills add cursor/plugins --skill principle-explain-the-number -a claude-code`. Or copy the skill folder (pstack/skills/principle-explain-the-number in cursor/plugins) into .claude/skills/principle-explain-the-number in your project. Claude Code loads it when a task matches its description.

How do I install Principle Explain The Number in Codex?

Run `npx skills add cursor/plugins --skill principle-explain-the-number -a codex`. Or copy the skill folder (pstack/skills/principle-explain-the-number in cursor/plugins) into .agents/skills/principle-explain-the-number in your project. Codex loads it when a task matches its description.

Can I use Principle Explain The Number 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 cursor/plugins --skill principle-explain-the-number -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/principle-explain-the-number, .gemini/skills/principle-explain-the-number, .github/skills/principle-explain-the-number and .opencode/skills/principle-explain-the-number in your project.

What does Principle Explain The Number need to run?

SKILL.md names no scripts, command-line tools or credentials: Principle Explain The Number is instructions for the agent only.

Does Principle Explain The Number access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Principle Explain The Number safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Principle Explain The Number use?

No licence was found for Principle Explain The Number or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Principle Explain The Number use?

About 528 tokens (SKILL.md is roughly 2.1k 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 Principle Explain The Number?

Skills that share tags, products or a category with Principle Explain The Number: Explain Usage (asgeirtj/system_prompts_leaks, 69k stars), Implementing Zero Trust In Cloud (mukul975/Anthropic-Cybersecurity-Skills, 34k stars), Zero Trust (sickn33/agentic-awesome-skills, 47k stars) and Uxui Principles (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Principle Explain The Number?

cursor (a GitHub organization, an official publisher) maintains it in cursor/plugins, which has 10,278 GitHub stars. The repository holds 99 skills in this directory. The repository was last updated on October 8, 2026.

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