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 dylantarre/animation-principles --skill solid-drawing-masterygit clone --depth 1 https://github.com/dylantarre/animation-principlesWrote 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/dylantarre/animation-principles/solid-drawing-mastery)<a href="https://agentmods.dev/skills/dylantarre/animation-principles/solid-drawing-mastery"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/solid-drawing-mastery/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/dylantarre/animation-principles/solid-drawing-mastery"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/solid-drawing-mastery.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00030 | $0.01027 |
| Opus 5 | $0.00015 | $0.00513 |
| Sonnet 5 | $0.00006 | $0.00205 |
| Haiku 4.5 | $0.00003 | $0.00103 |
Grade A, and why
solid-drawing-mastery 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.
How it starts
The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Solid Drawing Mastery
The Dimensional Principle
Solid drawing means creating the illusion of three-dimensional form, weight, and volume. In traditional animation, it meant understanding anatomy, perspective, and form. In digital motion, it means ensuring transforms and movements feel grounded in physical space, not flat manipulations of 2D shapes.
Core Theory
Form over symbol: Beginning animators draw symbols (a circle for a head, lines for arms). Master animators draw forms—volumes that exist in space with weight and dimension.
Construction consistency: Objects must maintain consistent volume and proportions throughout motion. A character's head shouldn't grow when they turn. A box shouldn't warp into a trapezoid.
The Three-Dimensional Challenge
Animation exists in time, but also in space. Solid drawing ensures:
- Volume consistency: Objects don't accidentally grow or shrink
- Perspective accuracy: Rotations follow dimensional rules
- Weight presence: Forms feel like they have mass occupying space
- Structural integrity: Objects don't collapse or warp incorrectly
Elements of Solidity
Construction: Understanding what's beneath the surface—skeleton, structure Perspective: Proper foreshortening, vanishing points, spatial relationships Volume: Maintaining 3D mass during 2D representation Weight distribution: How mass shifts and settles in space Lighting consistency: Shadows and highlights that reinforce form
Interaction with Other Principles
Squash/stretch must maintain volume: The core solid drawing constraint—deformation without mass change.
Arcs exist in 3D space: Paths must make dimensional sense, not just screen-space sense.
Follow through respects physics: Secondary elements move as 3D forms, not flat graphics.
Staging considers depth: Solid drawing enables clear spatial relationships.
Domain Applications
UI/Motion Design
- 3D transforms: Rotations must respect perspective and vanishing points
- Depth layers: Z-space relationships remain consistent during motion
- Scale animations: Objects scale from logical center points, not arbitrary origins
- Card flips: Perspective-accurate rotations, not flat X-axis scales
- Shadows: Move consistently with object position in 3D space
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 · 103 lines · 30 tokens per session scan A 3c85669f0f45
solid-drawing-mastery is a skill published in the GitHub repository dylantarre/animation-principles (81 stars, last pushed 8mo ago), licensed MIT. It adds 30 tokens to every session and 1,027 once invoked, about $0.0002 per session on Opus 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 2026-09-03.
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