Scroll Progress Timeline

What it does

When your agent uses it

• Service processes
• Narratives where progress through the sequence should become visible while scrolling

Example prompts

• “/scroll-progress-timeline”

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

1. 1Render a quiet base line behind every point.
2. 2Place one progress line on top with transform-origin: top for vertical or left for horizontal.
3. 3Measure the first and last point centers, not arbitrary section edges.
4. 4Normalize scroll position between those centers.
5. 5Apply scaleY(progress) or scaleX(progress) so updates stay on the compositor.
6. 6Mark a step active when the progress head crosses its center.

What it can do on your machine

Read from SKILL.md and the folder at commit 238ef60. 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 (its code samples are javascript).

  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

Scroll Progress Timeline loads about 998 tokens when it runs. Until then it costs about 102 tokens; SKILL.md has 456 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~102

When it runs · the whole SKILL.md, loaded when a task matches

~998

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

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

The full file from nirholas/three.ws at commit 238ef60, republished under its Apache-2.0 licence (© nirholas). 456 words, ~998 tokens.

name

scroll-progress-timeline

description

Turn any ordered process into a data-driven vertical or horizontal scroll story with a base line, progress fill, active step states, responsive collapse, semantic fallback, and reduced-motion behavior. Use for onboarding, checkout, roadmaps, recipes, case studies, service processes, histories, or narratives where progress through the sequence should become visible while scrolling.

const steps = [
  { id: "brief", number: "01", title: "Set the direction", body: "..." },
  { id: "build", number: "02", title: "Make the system", body: "..." },
  { id: "ship", number: "03", title: "Release and learn", body: "..." }
];

const progress = Math.min(1, Math.max(0,
  (viewportAnchor - lineStart) / (lineEnd - lineStart)
));
line.style.transform = `scaleY(${progress})`;

© nirholas, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 5 other files in third_party/designcode-agent-skills/agent-skills/web-design/scroll-progress-timeline of nirholas/three.ws.

• SKILL.md
• REFERENCES.md
• agents/openai.yaml
• demo/PROMPT.md
• demo/index.html
• demo/preview.jpg

Open the folder on GitHubat commit 238ef60

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in nirholas/three.ws, which our catalogue first saw on October 7, 2026.

• MengTo/Skillsagent-skills/web-design/scroll-progress-timeline