compress-md-landing-page-prompt.crux

compress-md-landing-page-prompt.crux is a cursor rule for Cursor from zotoio/CRUX-Compress. It costs 0 tokens per session (2,424 once invoked), scanned C, original, MIT.

A generated specification for a single static landing page for CRUX-Compress, an experimental tool for extracting shorter semantic versions of content. It describes the page's content, design, technology, and accessibility requirements.

In plain words
What is it for?
Use it to guide implementation of the compress.md landing page with static HTML, CSS, and JavaScript.
Why use it?
It provides a detailed reference for building the landing page and keeping its structure, visual direction, and stated claims consistent.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc). Also seen: mentions AGENTS.md; mentions Cursor.

Good fit Use it to guide implementation of the compress.md landing page with static HTML, CSS, and JavaScript.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/zotoio/crux-compress/compress-md-landing-page-prompt.crux
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.

Clone the repo
git clone --depth 1 https://github.com/zotoio/CRUX-Compress

Made for: Cursor.

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 compress-md-landing-page-prompt.crux

README.md
[![agentmods](https://agentmods.dev/badge/rules/zotoio/crux-compress/compress-md-landing-page-prompt.crux/github.svg)](https://agentmods.dev/rules/zotoio/crux-compress/compress-md-landing-page-prompt.crux)
Your own site
<a href="https://agentmods.dev/rules/zotoio/crux-compress/compress-md-landing-page-prompt.crux"><img src="https://agentmods.dev/badge/rules/zotoio/crux-compress/compress-md-landing-page-prompt.crux/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 compress-md-landing-page-prompt.crux

Your own site · 80×15
<a href="https://agentmods.dev/rules/zotoio/crux-compress/compress-md-landing-page-prompt.crux"><img src="https://agentmods.dev/badge/rules/zotoio/crux-compress/compress-md-landing-page-prompt.crux.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 2,424 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 $0.00000 $0.02424
Opus 5 $0.00000 $0.01212
Sonnet 5 $0.00000 $0.00485
Haiku 4.5 $0.00000 $0.00242

Measured 12d ago against content hash 4490405dddb3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade C, and why

compress-md-landing-page-prompt.crux scanned grade C with 2 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 12d 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

install=`curl -fsSL https://raw.githubusercontent.com/zotoio/CRUX-Compress/main/install.sh | bash`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

install=`curl -fsSL https://raw.githubusercontent.com/zotoio/CRUX-Compress/main/install.sh | bash`
web/compress-md-landing-page-prompt.crux.mdc · 224 lines

How it starts

The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.

[!IMPORTANT] Generated file - do not edit!

COMPRESS.MD — Landing Page Build Specification

⟦CRUX:compress-md-landing-page-prompt.md
Ρ{compress.md landing page}
  target=single static page for CRUX-Compress
  repo=github.com/zotoio/CRUX-Compress
  domain=compress.md; status=EXPERIMENTAL!
  msg="Reclaim ≤80% ctx window. CRUX→semantic core extraction"
  journey{land→compression viz»scroll»explore»expand spec»install}

Κ{ctx=context; cmp=compression;
  verbose=uncompressed; sp=space; ch=char}

Λ.tech{
  stack=static HTML/CSS/JS(¬build step)
  hosting=GitHub Pages compatible
  deps=minimal+CDN-loaded
  perf≤3s first meaningful paint@4G
  a11y=WCAG 2.1 AA
}

Λ.design{
  palette{¬purple!; ¬std AI gradients!
    USE=[deep teals,warm ambers,charcoal blacks]
    ACCENT{verbose=cool; compressed=warm}}
  typo{mono=[code,CRUX notation]; sans=Inter|system-ui}
  layout{¬generic cards!; ¬cookie-cutter hero!
    YES=[asymmetric,intentional whitespace,editorial]}
  anim=purposeful only→every motion communicates cmp
}

Λ.content{
  tone=technical+precise+forward-looking
  audience=engineers who've hit ctx limits
  claims=["≤80% token reduction","experimental tool","LLMs interpret natively"]
}

Π.sections{
  S0{name="Hero—Compression Chamber"; type=CSS viz
    concept="animated gradients+floating particles→transformation atmosphere"
    full viewport height
    overlay{title="CRUX";subtitle="Context Reduction Using X-encoding"
      progress bar="80% RECOVERED";stats="2,500→500 tokens"}}

  S1{name="The Problem"; layout=split
    left=verbose markdown; right=ctx window viz
    copy="AI assistants rely on ctx windows. Rules consume tokens.
      As rule library grows→ctx balloons. You want readable rules;
      LLMs just need actionable info."
    pain="70% consumed by rules"}

  S2{name="The Approach—Live Compression Demo"
    layout=side-by-side panels
    left{title="BEFORE: 625 tokens"; content=verbose markdown}
    right{title="AFTER: 112 tokens"; content=CRUX notation}
    anim=scroll-triggered line-by-line cmp
    msg="LLMs interpret CRUX natively. ¬decompression. ¬training."}

  S3{name="The Notation—Interactive Spec Explorer"
    layout=expandable/collapsible sections
    default=collapsed+preview; click→expand
    groups=[STRUCTURE,COMPARISON,PRIORITY,DATA_FLOW,SEQUENCE,
      RELATIONS,LOGIC,CHANGE,QUALIFIERS,IMPORTANCE,STANDARD_BLOCKS]
    link="View Full Spec on GitHub→"}

  S4{name="Quickstart"
    warning="⚠ EXPERIMENTAL—expect breaking Δ. Provide feedback."
    install=`curl -fsSL https://raw.githubusercontent.com/zotoio/CRUX-Compress/main/install.sh | bash`
    prereqs=[curl,unzip,Cursor IDE]
    installed{
      CRUX.md="Specification (readonly)"
      AGENTS.md="Agent awareness notice"
      .cursor/rules/_CRUX-RULE.mdc="Always-applied rule"
      .cursor/agents/crux-cursor-rule-manager.md
      .cursor/commands/crux-compress.md
      .cursor/hooks/crux-detect-changes.sh
      .crux/crux.json}
    usage{1.+`crux:true` to frontmatter; 2.run `/crux-compress ALL`; 3."Watch ctx breathe"}
    links=["View on GitHub→","Read Full Docs→","Report Issue→"]}

  S5{name="Footer"
    title="CRUX—Context Reduction Using X-encoding"
    desc="experimental tool for AI ctx optimization"
    license=MIT; ver=v2.1.0
    links=[GitHub,Specification,Changelog,Issues]}
}

Γ.hero{
  CSS anim background{
    radial gradients→[teal@20%30%,amber@80%70%,gold@center]
    floating particles via @keyframes
  }
  scroll.ctrl{
    scrollY→normalizedProgress(0.0..1.0)
    →compression bar fill
    →percentage update}
}

Φ.design{
  colors{
    bg{primary:#0a0f0f#near-black+teal undertone
      secondary:#141c1c#dark teal-gray
      tertiary:#1e2a2a#code block bg}
    text{primary:#e8eeee#warm white
      secondary:#8fa3a3#muted teal-gray
      tertiary:#5a7070#subtle}
    accent{verbose:#5b8a9a#cool teal
      compressed:#d4915a#warm amber
      symbol:#f0c674#bright gold}
    interactive{link:#7ab3c2; hover:#9fd4e3}
    border{default:#2a3838; focus:#4a6868}
    experimental:#c27a5a#warm orange}

  typo{
    fonts{mono:'JetBrains Mono','Fira Code','SF Mono'
      sans:'Inter',system-ui,-apple-system}
    scale(1.25 ratio){xs:0.64rem;sm:0.8rem;base:1rem;lg:1.25rem
      xl:1.563rem;2xl:1.953rem;3xl:2.441rem;4xl:3.052rem}
    leading{tight:1.2;normal:1.5;relaxed:1.75}}

  spacing{
    1:0.25rem;2:0.5rem;3:0.75rem;4:1rem;6:1.5rem
    8:2rem;12:3rem;16:4rem;24:6rem;32:8rem}

  components{
    code-block{bg:tertiary;border:1px+left 3px compressed
      border-radius:0 4px 4px 0;font:mono;size:sm}
    code-block--crux{left-border:symbol;bg:gradient→symbol 5%}
    spec-section{border:1px;radius:4px;expandable
      header{bg:secondary;hover:tertiary;cursor:pointer}
      symbols{font:mono;color:symbol;margin-left:auto}}
    compression-bar{height:8px;radius:4px
      fill:gradient verbose→compressed
      label{font:mono;size:xs;color:text-primary}}}
}

E.demo{
  before{
    "# Team Development Standards\n## Style Rules\n
    ### Indentation & Formatting\n* Use **2 spaces**...\n
    * **Never use tabs!**...\n* Lines must not exceed **100 chars**\n
    ### Naming Conventions\n| Element | Convention |..."}
  after{
    "⟦CRUX:coding-standards.md\nΡ{team dev standards}\n
    R.style{\n  indent=2sp; ¬tabs!; line≤100ch\n
      naming{fn=camelCase; cls=PascalCase; const=UPPER_SNAKE}\n}\n⟧"}
  try-it{
    api-rules="⟦CRUX:api-rules\nΡ{REST API design standards}\n
      R{∀endpoint→versioned(/v{n}/);auth=JWT|API_KEY;rate.limit=100/min}\n
      P.response{success→{data,meta};error→{code,message,details?}}\n
      Λ{5xx→retry»backoff[max=3];429→wait(retry-after)}\n
      Γ{req»validate»auth»process»respond}\n
      Ω{consistency≻flexibility;explicit≻implicit;¬halluc}\n⟧"
    code-mod="⟦CRUX:code-mod-protocol\nR=req→truth;gap→assume+mark;?arch→ask first\n
      C=obs→cite path:lines;repo≻chat\nΔ=R≠C→tag{code|tests|req}+why\n
      PLAN=min files+targeted Δ;justify+file|broad\n
      PATCH=surgical diff;¬rewrite w/o proof\nCHECK=run»+tests|static val\n
      STATE={R,C,Δ}→upd on progress\nΩ{¬halluc;verified only}\n⟧"}
}

P.principles{
  non-negotiable[
    1."Visual impact matters—hero communicates compression via design"
    2."Experimental status is honest—every section acknowledges. Build trust via transparency"
    3."Show, don't claim—live demo≻marketing copy. Make unmissable"
    4."Technical audience respect—¬dumb down. Speak to ctx limit pain precisely"
    5."Performance non-negotiable—smooth 60fps simple≻janky complex"]
  design-philosophy[
    "asymmetry≻grids"; "editorial whitespace"; 
    "purposeful anim→every motion=compression"; "warm technical—precise¬cold"]
  positioning[
    "early but promising"; "part of emerging ctx engineering discipline";
    "evolves w/ community input"; "experiment w/¬depend on(yet)"]
}

M{
  project:compress.md; version:1.0.0-alpha
  repo:https://github.com/zotoio/CRUX-Compress
  license:MIT
  browsers=all modern(Chrome,Edge,Firefox,Safari)+mobile
  deps=none required(vanilla JS)
  hosting:GitHub Pages; analytics:none(privacy-first)
}

Κ.deliverables{
  /compress.md/
  ├─index.html#single page all content
  ├─styles/main.css#all styles+CSS custom properties
  ├─scripts/
  │ ├─camera-controller.js#scroll-linked anim
  │ ├─compression-demo.js#before/after anim
  │ └─spec-expander.js#expandable notation sections
  ├─assets/
  │ ├─og-image.png#social sharing
  │ └─favicon.svg#CRUX-themed
  └─README.md#deployment instructions
}

Ω{
  hero visual impact!
  experimental status acknowledged∀sections
  show≻claim via live demo
  60fps performance
  ¬purple; ¬std AI gradients
  asymmetric editorial layout
  ≤3s first paint@4G
}
⟧

Read the full file on GitHub · 224 lines

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. 12d ago First seen · 224 lines · 0 tokens per session scan C 4490405dddb3

Subscribe to this mod's changes

compress-md-landing-page-prompt.crux is a cursor rule published in the GitHub repository zotoio/CRUX-Compress (8 stars, last pushed 5d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,424 tokens. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.