fitts-law SKILL.md skillA
fitts-law from the-artificer-of-ciphers-llc/skills-from-the-artificer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add the-artificer-of-ciphers-llc/skills-from-the-artificer/fitts-law@git:20260530.3e17152Pins git:20260530.3e17152 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- the-artificer-of-ciphers-llc/skills-from-the-artificer
- Path
fitts-law/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260530.3e17152, committed May 30, 2026
- Size
- 3,597 bytes
- Repository stars
- 6
- License
- MIT
Apply Fitts's Law whenever someone is designing or critiquing a user interface—button placement, click targets, menu design, touch UI, navigation, or any interactive element. Trigger on phrases like "where should I put this button?", "users are missing this control", "the click target feels small", "how should I design this menu?", or any UX/UI discussion about the effort required to interact with an element. Fitts's Law is one of the oldest and most empirically reliable principles in…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Fitts's Law > "The time to acquire a target is a function of the distance to and the size of the target." > — Paul Fitts, 1954 ## The core idea Fitts's Law says: the time it takes to move to and click (or tap) a target depends on two things: 1. **Distance** — how far away is the target from your starting position? 2. **Size** — how big is the target? Big targets that are close are fast and easy to hit. Small targets that are far away are slow and error-prone. This sounds obvious, but its implications for interface design are profound and frequently ignored. The mathematical form: `T = a + b * log2(2D/W)` Where T = time, D = distance to target, W = width of target. You don't need to use the formula — just internalize the ratio: **bigger and closer is always better for targets users will interact with frequently.** ## Key design implications **1. The edges and corners of screens are infinitely large (on desktop).** …
Read the whole file at its exact version.
How to install
mdr add the-artificer-of-ciphers-llc/skills-from-the-artificer/fitts-law@sha256:50d5a0c1e4c391bfThe line at the top of this page pins the label git:20260530.3e17152, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_wvgfggaxg4edhkam)
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Versions
The registry has recorded 1 version of this file, committed on May 30, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3597 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
the-artificer-of-ciphers-llc/skills-from-the-artificer · 6 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wvgfggaxg4edhkam GET https://markdownregistry.com/api/v1/resolve?ref=the-artificer-of-ciphers-llc/skills-from-the-artificer/fitts-law GET https://markdownregistry.com/api/v1/blob/50d5a0c1e4c391bf205f0aaf74c4ab4a04f19039768f5af38df65febdfc3a3fe
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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