Borrowing it
Nothing to install: this file belongs to MasterPlayspots/motionspec. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/MasterPlayspots/motionspec/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/MasterPlayspots/motionspecWrote 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.
[](https://agentmods.dev/instructions/masterplayspots/motionspec/copilot-instructions)<a href="https://agentmods.dev/instructions/masterplayspots/motionspec/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/masterplayspots/motionspec/copilot-instructions/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.
<a href="https://agentmods.dev/instructions/masterplayspots/motionspec/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/masterplayspots/motionspec/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00882 | $0.00882 |
| Opus 5.5 | $0.00353 | $0.00353 |
| Sonnet 5.5 | $0.00176 | $0.00176 |
| Haiku 4.5 | $0.00088 | $0.00088 |
Grade A, and why
motionspec copilot-instructions.md scanned grade A with 0 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 18d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot instructions — motion accessibility with MotionSpec
These instructions apply whenever you write or change animation or transitions in web UI code
(CSS, React/JSX/TSX, Vue, Svelte, plain JS). Full context lives in AGENTS.md at the repo root.
Rules
- Respect
prefers-reduced-motion. Every animation and transition must be disabled or reduced under@media (prefers-reduced-motion: reduce)(CSS) or behindwindow.matchMedia('(prefers-reduced-motion: reduce)')(JS). This maps to WCAG 2.3.3 (Level AAA) — a best practice, not a Level A fix. - Provide a pause/stop control for motion that starts automatically and runs longer than
5 seconds, and for every
infiniteanimation (WCAG 2.2.2, Level A). A reduced-motion guard alone does not satisfy 2.2.2. - Never flash content more than 3 times per second (WCAG 2.3.1, Level A). MotionSpec does not audit flashing — verify this yourself.
- Animate
transformandopacityonly. Do not animate layout properties such aswidth,height,top,left,margin, orbackground. - When a MotionSpec catalog primitive fits (40 exist: 18 loops, 10 hover/press, 12 scroll), prefer writing a MotionSpec JSON spec and compiling it over hand-writing keyframes: the compiler emits the reduced-motion guard and the pause path by construction and its output is deterministic.
Commands (local, free, MIT — no key needed)
npx -p [email protected] motion compile spec.motionspec.json # validate (fail-closed, [MS-XXX] errors, exit 1) + emit ./out/*.motion.js and .css
npx -p [email protected] motion catalog # list the 40 primitives and the catalog version
npx -p [email protected] motion audit https://example.com --json # static motion-a11y scan of a live URL
There is no separate validate subcommand in the CLI; validation is the first stage of compile.
audit --json returns { ok, url, status, score, scoring, summary, badge, findings, groups, disclosures, coverage }.
Read status first: "not-measurable" means no CSS motion was found and score is null (not 0, not 100).
Findings of kind preload-candidate (loading indicators) are review items with no score impact.
badge is the literal string "reduced-motion-safe" only for a measurable page with zero findings and
no runtime motion library detected.
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.
- 18d ago Changed · +4 lines · +86 tokens per session 5123993ca342
- 1mo ago First seen · 51 lines · 796 tokens per session scan A fb162022c003
motionspec copilot-instructions.md is an instructions file published in the GitHub repository MasterPlayspots/motionspec (1 stars, last pushed yesterday), licensed MIT. It adds 882 tokens to every session, about $0.0035 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-08.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.