Accessibility is a coding standard, not a checklist Agent Skill

Enforces accessibility as a correctness property authored into each widget — Semantics(button/label) or ExcludeSemantics on every node…

Context cost
4k tokensestimated from the bundle, loaded when it triggers
Bundle
1 file · 16.2 kBtext throughout, nothing executable
Licence
MITthe author’s own terms
Last change
—no release on file
Servers it uses
Noneruns standalone

What it does

Enforces accessibility as a correctness property authored into each widget — Semantics(button/label) or ExcludeSemantics on every node, a11y state read from MediaQuery not app state, never MediaQuery.withClampedTextScaling / textScaleFactor / FittedBox / TextOverflow.ellipsis to fit a label, non-color redundant channels (icon+label+shape+text) for every state, contrast against composited backgrounds (4.5:1 body / 3:1 large), 44px single-tap targets, OrdinalSortKey traversal, and honoring boldText / reduce-motion.

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.

accessibilitymobilenode

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.md16.2 kB · preview
--- name: accessibility-as-code ---
6# Accessibility is a coding standard, not a checklist
7
8Accessibility is authored into the widget as you write it — the same tier as "the button actually works." There is no lint for any of this: flutter_lints and very_good_analysis ship zero a11y rules. Enforcement is the widget itself, review of your own diff, and widget tests. Applies to every interactive View, every Icon/Image, every state, and every color choice.
9
10Testing mechanics (guideline matchers, golden lanes, RTL, honest conformance limits) live in widget-golden-and-a11y-testing; this skill is the authoring discipline.
11
12## Non-negotiable rules
13
141. **Every interactive node gets Semantics(button: true, label: ...)** — a raw GestureDetector with no semantics silently locks out every screen-reader and switch user. Correct semantics make TalkBack, VoiceOver, Switch Access and Switch Control work for free; it is definition-of-done, never a backlog ticket.
152. **Every Icon/Image gets a semanticLabel, or is wrapped in ExcludeSemantics** because it is decorative. There is no third option — an unlabelled Icon is invisible to a screen reader.
163. **Read a11y state from MediaQuery at build time, never from app state.** MediaQuery is an InheritedWidget with correct-by-construction invalidation; pushing it through a provider trades a compiler-guaranteed rebuild for a frame of staleness in the one area where being wrong is total failure.
174. **Never MediaQuery.withClampedTextScaling, never textScaleFactor.** Both are clamping hacks that silently defeat the text-scale matrix while contrast and tap-target guidelines still pass green. Enforce with a source grep (see Anti-patterns).
185. **Never FittedBox, computed fontSize, or TextOverflow.ellipsis to make a label fit.** They turn "doesn't fit at 200%" from a loud test failure into truncated or shrunk text on a device. Build flexible heights and let text wrap.
196. **Never encode state through color alone.** Pair every stateful signal with at least one non-color channel — icon + text label + shape/pattern + position. Color-only state is invisible under invertColors, grayscale color-correction, and to every screen-reader user.
207. **Contrast is measured against the composited background in both themes** — body/icon text ≥ 4.5:1 (AA 1.4.3), large/hero text ≥ 3:1 (AA) — large text never has to clear a higher bar than body. Never test against the nominal token color when a fill, gradient, or translucency sits between text and surface.
218. **Every interactive target is ≥ 44×44 logical pixels and single-tap.** No long-press or precise-gesture-only affordances; hand-off and motor-impaired use demand a large forgiving target.
229. **Traversal order is authored with sortKey, never inherited from layout** — visual position optimized for the thumb actively pessimises linear screen-reader/switch scanning.
2310. **Honor boldText; keep haptics through reduced motion.** Hardcoding fontWeight throws the setting away. Read disableAnimations from MediaQuery here, but resolve *how* motion collapses through design-system-structure's reduced-motion token + resolveMotion helper (that skill owns the mechanism) — an animation that still conveys meaning with no reduced-motion path is a bug.
24
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md2,135 words
Files1
LicenceMIT
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.

≈220
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
3,830
on trigger
The instruction body, 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. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

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

1 file, 16.2 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md16.2 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 1 file you can review in full before installing. The MIT 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.

# Accessibility is a coding standard, not a checklist · 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/accessibility-is-a-coding-standard-not-a-checklis/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/accessibility-is-a-coding-standard-not-a-checklis" ] && { [ ! -e .claude/skills/accessibility-is-a-coding-standard-not-a-checklis ] || { mv .claude/skills/accessibility-is-a-coding-standard-not-a-checklis "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/accessibility-is-a-coding-standard-not-a-checklis" .claude/skills/ && echo "Installed .claude/skills/accessibility-is-a-coding-standard-not-a-checklis"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add zakariaf/accessibility-is-a-coding-standard-not-a-checklis

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/accessibility-is-a-coding-standard-not-a-checklis/ 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/accessibility-is-a-coding-standard-not-a-checklis/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/accessibility-is-a-coding-standard-not-a-checklis" ] && { [ ! -e ~/.claude/skills/accessibility-is-a-coding-standard-not-a-checklis ] || { mv ~/.claude/skills/accessibility-is-a-coding-standard-not-a-checklis "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/accessibility-is-a-coding-standard-not-a-checklis" ~/.claude/skills/ && echo "Installed ~/.claude/skills/accessibility-is-a-coding-standard-not-a-checklis" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/accessibility-is-a-coding-standard-not-a-checklis/ 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. It appears as accessibility-as-code in Gemini CLI, Codex, Copilot and Grok (its own name); Claude Code lists it by the folder name, accessibility-is-a-coding-standard-not-a-checklis.

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
Referencezakariaf/accessibility-is-a-coding-standard-not-a-checklis

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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