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 jeffreytse/grimoire-core --skill apply-figure-drawing-fundamentalsgit clone --depth 1 https://github.com/jeffreytse/grimoire-coreWrote 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/jeffreytse/grimoire-core/apply-figure-drawing-fundamentals)<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/apply-figure-drawing-fundamentals"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-figure-drawing-fundamentals/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/jeffreytse/grimoire-core/apply-figure-drawing-fundamentals"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-figure-drawing-fundamentals.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 | $0.00027 | $0.01152 |
| Opus 5 | $0.00014 | $0.00576 |
| Sonnet 5 | $0.00005 | $0.00230 |
| Haiku 4.5 | $0.00003 | $0.00115 |
Grade A, and why
apply-figure-drawing-fundamentals 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 11d 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 — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apply Figure Drawing Fundamentals
Build structurally accurate, proportionally sound human figures using a systematic construction method rooted in canonical anatomy.
Why This Is Best Practice
Adopted by: RISD, Pratt Institute, Art Center College of Design, and every major atelier worldwide; Loomis methods are standard prerequisites for character design programs at Disney, DreamWorks, and Pixar animation schools Impact: Artists who master constructive figure drawing reduce anatomical errors in finished character work by an estimated 50%; Bridgman's block-mass approach is the direct predecessor of modern 3D character rigging workflows that rely on the same mass-and-joint logic Why best: The human figure is the subject that viewers scrutinize most critically; systematic construction ensures proportional accuracy and anatomical plausibility that stylistic shorthand and pure gesture cannot guarantee
Sources: Andrew Loomis "Figure Drawing for All It's Worth" (1943); George Bridgman "Constructive Anatomy" (1920); Juliette Aristides "Classical Drawing Atelier" (2013)
Steps
- Establish the head-unit scale — draw the head shape first as an egg or sphere-plus-plane form; the adult figure is 7–7.5 heads tall (heroic proportions use 8); mark the total height and subdivide it before placing any other element.
- Place the keystone landmarks — mark the chin, pit of the neck, nipple line, navel, pubic symphysis, mid-thigh, knee, and ankle in their correct head-unit positions along the vertical axis.
- Block the major masses — use Bridgman's block method: torso as a box tilting on a ribcage-pelvis axis, head as a sphere, limbs as cylinders; render these as simplified solids before adding surface anatomy.
- Draw the spine curve — the S-curve of the spine connects the skull, thoracic cage, and pelvis; its curvature determines the character's weight, attitude, and center of balance.
- Set the shoulder and hip tilt relationship — when weight shifts to one leg, the hip on the weight-bearing side rises and the shoulder on the same side typically drops (counter-rotation); mark these tilts as angled lines before drawing arms or legs.
- Construct limbs as overlapping cylinders — upper arm, forearm, and hand are three distinct cylindrical forms that foreshorten independently; draw through each to show their three-dimensional rotation.
- Add major muscle groups as surface wrapping — lay the largest muscles (deltoid, pectorals, latissimus, quadriceps, gastrocnemius) over the structural scaffold as simplified convex shapes before adding secondary details.
- Check proportions with the plumb line — drop a vertical from the pit of the neck; in a balanced standing pose it should bisect the feet or the weight-bearing foot.
- Draw hands and feet from their own block masses — hand = a wedge-shaped palm block plus four finger cylinders plus a thumb cylinder; foot = a wedge with the ankle joint positioned above and behind the heel block.
- Refine edge quality to indicate form — use hard edges where forms turn away sharply (bone near surface), soft edges where forms round gradually (fleshy masses); edge variation communicates volume more efficiently than shading.
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.
- 11d ago First seen · 54 lines · 27 tokens per session scan A ba9366d23d9e
apply-figure-drawing-fundamentals is a skill published in the GitHub repository jeffreytse/grimoire-core (4 stars, last pushed 23d ago), licensed MIT. It adds 27 tokens to every session and 1,152 once invoked, about $0.0001 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 2026-08-31.
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