Closure Agent Skill

Apply the Gestalt principle of Closure — the perceptual tendency to see incomplete shapes as whole.

Context cost
4k tokensestimated from the bundle, loaded when it triggers
Bundle
2 files · 15.8 kBtext throughout, nothing executable
Licence
Apache-2.0the author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Apply the Gestalt principle of Closure — the perceptual tendency to see incomplete shapes as whole. Use when designing icons (a few strokes can imply a closed shape), illustrations (negative space defines forms), logos (the IBM stripes, the WWF panda, the FedEx arrow), card layouts (cards don''t need full borders to feel like containers), or any visual that benefits from suggested rather than fully drawn shapes. Closure lets you communicate more with less; the user''s perception completes the form.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

design
Filed under

Design & Media

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md9.5 kB · preview
--- name: closure ---
6# Closure
7
8> **Definition.** Closure is the Gestalt principle that the visual system tends to perceive incomplete shapes as complete — to "close" gaps in outlines and recognize implied forms. A circle with small breaks in its outline is still seen as a circle. A few strokes that suggest a face are perceived as a face. Negative space between objects can imply a third object that isn't actually drawn. The brain fills in what isn't there.
9
10The classic Gestalt demonstrations of closure use simple shapes with strategic gaps. A "circle" made of 12 dot pairs around its circumference reads as a circle, not as 24 dots. A "triangle" formed by three Pac-Man-shaped figures (the Kanizsa triangle) is perceived clearly even though no triangle is actually drawn — only the gaps imply one.
11
12This perceptual tendency has substantial design value. It lets you communicate forms with less visual information than would be needed to draw them fully. The result is interfaces that feel light, illustrations that feel modern, logos that work at many sizes, and visual cues that work even at minimum scale.
13
14## Why closure matters
15
16Closure does several useful jobs in design:
17
18**Visual economy.** A form suggested by a few strokes is faster to read than a fully-rendered form, and it scales better — a partial shape can communicate at sizes where a fully detailed shape would be a blur.
19
20**Visual elegance.** Designs that exploit closure feel modern and crafted. The viewer participates in completing the form, which creates a small moment of cognitive engagement.
21
22**Memorable iconography.** Logos and icons that use closure are often more memorable than fully-drawn equivalents. The FedEx logo's hidden arrow (in the negative space between E and X) is a famous example — once you see it, you can't unsee it.
23
24**Reduced visual weight.** A card with subtle visual cues at its corners (rather than a full border) feels lighter than a card with a heavy outline. The closure principle lets the user perceive the container even though most of its border isn't drawn.
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md1,495 words
Files2
LicenceApache-2.0
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈140
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
3,810
on trigger
The instruction body and 1 supporting file, read only when the skill fires.
2.0%
of a 200k window
Ten skills this size would take about 20% of the window before you open a file.
050k100k150k200k context window

4k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Middling. Fine to keep on in a project where you use it weekly, worth unloading in one where you never do.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

2 files, 15.8 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md9.5 kB
  • references/lineage.md6.3 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 2 files you can review in full before installing. The Apache-2.0 licence covers the templates and examples as well as the instructions.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Closure · 4k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/closure/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/closure" ] && { [ ! -e .claude/skills/closure ] || { mv .claude/skills/closure "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/closure" .claude/skills/ && echo "Installed .claude/skills/closure"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add hashgraph-online/closure

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/closure/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/closure/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/closure" ] && { [ ! -e ~/.claude/skills/closure ] || { mv ~/.claude/skills/closure "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/closure" ~/.claude/skills/ && echo "Installed ~/.claude/skills/closure" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/closure/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Versionnot versioned
Publishedno release date on file
PriceFree
Referencehashgraph-online/closure

Versions

Its author publishes no version number, so there is nothing here to pin to: what you install is the folder as it stands today. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

Pinning

Nothing to pin to: this skill carries no version number of its own. What you install is what the folder holds on the day you install it.

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Publisher
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