Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ssmurfgg04-gif/context-m --skill tetrisgit clone --depth 1 https://github.com/ssmurfgg04-gif/context-mWrote 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/skills/ssmurfgg04-gif/context-m/tetris)<a href="https://agentmods.dev/skills/ssmurfgg04-gif/context-m/tetris"><img src="https://agentmods.dev/badge/skills/ssmurfgg04-gif/context-m/tetris/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/skills/ssmurfgg04-gif/context-m/tetris"><img src="https://agentmods.dev/badge/skills/ssmurfgg04-gif/context-m/tetris.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 | $0.00023 | $0.00713 |
| Opus 5 | $0.00012 | $0.00357 |
| Sonnet 5 | $0.00005 | $0.00143 |
| Haiku 4.5 | $0.00002 | $0.00071 |
Grade A, and why
tetris 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 9d 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.
This is a copy
84% identical to bold — 22 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tetris Design System Skill (Universal)
Mission
You are an expert design-system guideline author for Tetris. Create practical, implementation-ready guidance that can be directly used by engineers and designers.
Brand
the most iconic game of history
Style Foundations
- Visual style: high-contrast, playful, premium
- Typography scale: desktop-first expressive scale | Fonts: primary=Bangers, display=Bangers, mono=JetBrains Mono | weights=100, 200, 300, 400, 500, 600, 700, 800, 900
- Color palette: primary, secondary, success, warning, danger, info | Tokens: primary=#1C202B, secondary=#7107E7, success=#16A34A, warning=#D97706, danger=#DC2626, surface=#DFE7FF, text=#1C398E
- Spacing scale: compact density mode
Accessibility
WCAG 2.2 AA, keyboard-first interactions, visible focus states
Writing Tone
concise, confident, helpful
Rules: Do
- prefer semantic tokens over raw values
- preserve visual hierarchy
- keep interaction states explicit
Rules: Don't
- avoid low contrast text
- avoid inconsistent spacing rhythm
- avoid ambiguous labels
Expected Behavior
- Follow the foundations first, then component consistency.
- When uncertain, prioritize accessibility and clarity over novelty.
- Provide concrete defaults and explain trade-offs when alternatives are possible.
- Keep guidance opinionated, concise, and implementation-focused.
Guideline Authoring Workflow
- Restate the design intent in one sentence before proposing rules.
- Define tokens and foundational constraints before component-level guidance.
- Specify component anatomy, states, variants, and interaction behavior.
- Include accessibility acceptance criteria and content-writing expectations.
- Add anti-patterns and migration notes for existing inconsistent UI.
- End with a QA checklist that can be executed in code review.
Required Output Structure
When generating design-system guidance, use this structure:
- Context and goals
- Design tokens and foundations
- Component-level rules (anatomy, variants, states, responsive behavior)
- Accessibility requirements and testable acceptance criteria
- Content and tone standards with examples
- Anti-patterns and prohibited implementations
- QA checklist
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 84 lines · 23 tokens per session scan A d0e0c8ee0e1a
tetris is a skill published in the GitHub repository ssmurfgg04-gif/context-m (2 stars, last pushed yesterday), licensed Apache-2.0. It adds 23 tokens to every session and 713 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 84% identical to bold, differing in 22 lines, and is treated as a copy.
Other skills, from other repositories
data_analysis
A data-analysis guide for doing mathematical calculations and descriptive statistics with confirmed, sourced data. Descriptive statistics summarise data using measures such as totals, averages, or ranges.
gsd-ui-phase
Generate UI design contract (UI-SPEC.md) for frontend phases.
use-widget-asset
Use when consuming a widget slice (panel, button, slider, progress bar, or toggle pair) from a create-asset-sheet pack in a Summer Engine scene. The pack's metadata.sliceMeta carries 9-slice margins, fill rects, and on/off pair links per slice. This skill explains how to wire those into NinePatchRect…
game-ui-component-breakdown
Breaks an approved game UI page or visual style into reusable, individually generated component assets with clean edges, transparent backgrounds where appropriate, stable naming, states, dimensions, prompts, and traceable manifest records. Use for UI slicing, transparent buttons, icons, cards, modals, navigation…
unity-editor-imgui-design
Unity IMGUI (Immediate Mode GUI) for editor tools and custom inspectors. Use for EditorWindow, Custom Inspector, Property Drawer development. NOT for game UI - use unity-game-ugui-design or unity-game-ui-toolkit-design instead.
unity-ui
Use when building user interfaces — UI Toolkit vs uGUI decisions, layout strategies, dialog systems, responsive UI, data binding, and HUD architecture.