# Anatomy: a designer turned his hand-drawn isometric technique into a skill, 29 days, 25k stars · GitHub open-source project

> Source: https://stringers.io/en/github/gh_wheresryan22__anatomy.html (Stringers / 什么值得做, generated 2026-11-08)
> Stringers answers one question every day: what small product can one or two people build in a few months and actually make money from. Numbers come from 15 databases we collect daily, each with source and date.
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> The demo video makes sense to anyone; the author teased it on X before it took off, and a misreading ('Claude can make images now') spread it beyond its circle; big accounts reposted it with prompts, and Perplexity and Hermes Agent made it an official skill within a week. The author is a designer who already drew this kind of picture by hand, so the output quality far exceeds a casually written prompt.

[GitHub open-source project](https://stringers.io/en/github/index.md) · written 11-6

wheresryan22/anatomy · wheresryan22

# Anatomy: a designer turned his hand-drawn isometric technique into a skill, 29 days, 25k stars

**What it is** A free skill for AI coding tools like Claude Code: you name a concept, and it uses code to draw an interactive, takeapart-able isometric machine, letting the machine's operation explain the concept.

**Why it took off** Anyone can understand the demo video. The author teased it on X before it blew up, and it went viral with a misreading that "Claude can make images now." Big accounts reposted it with prompts, and within a week Perplexity and Hermes Agent adopted it as an official skill. The author is a designer who already drew these diagrams by hand, so the output far exceeds what casual prompts produce.

**B** **How you can ride this** : Stop building isometric skills. Package a different visual craft you actually know as "rules + examples + a self-check script," launch it with a ten-second video and a one-line install command, then pitch it to agent platforms to be adopted as an official skill.

Grade B: the window for showcase skills to earn stars is still open, and Anatomy lays out the playbook clearly. But that slot is already taken, and copycats only reach a few hundred stars. Whether you succeed depends on whether you have a real craft and a video that can go viral. Neither can be copied. Public / widely discussed

Data (updated daily) · Repo created 2026-10-08 · 25,726 stars · 7 days +2,413

GitHub · stars

Data 2026-10-11 → 2026-11-08 (29 days, 29 observations). Points before 10-28 come from deeply / archive backfill, not every day has one

In 2026 Oct 10, a designer named Ryan (on X as @wheresryan22) posted: "Introducing Anatomy: Describe a machine in one line. Claude brings it to life." The video showed an isometric line-drawing machine: hover the mouse and the parts separate layer by layer; click, and it runs, with the readouts beside it changing. Two days later the post had 1.4M views and 19k bookmarks (CellCog recorded this at 10-12 07:03 UTC), and by 11-06 it had 2.68M views and 18.2k likes. The repo was created only 10-08, gained 10-13 stars in a day, and reached 11-06 stars at 25,198 3,372. It's a Claude Code skill with no model code. Indie developers who want stars for their open-source projects can learn two things from it: what to put in a skill, and how to launch it.

### What it actually is

An Agent Skill under MIT license, usable right after install: `npx skills add wheresryan22/anatomy -g`, then type `/anatomy explain how a token bucket rate limiter works, interactive`. It runs on Claude Code, Codex, OpenCode, Antigravity, and MiniMax Code. No API key needed, just Node 20.10+ and Chrome.

The first line of the README is "A Claude skill that explains an idea by building it as a real, working object." The top rule in SKILL.md is "the object is the explanation": no box diagrams, no arrows. Claude invents a physical object, and how that machine works is how the concept works. A cache key is drawn as a pin tumbler lock, a queue as a marble track, an LRU cache as a bookshelf that ejects the oldest book. Things that are already machines, like a four-stroke engine, a clock escapement, or a car differential, are drawn as they actually are.

Three output types: pure SVG (four-tone shaded isometric parts inside a card with live readouts), SVG plus WebGL (fire, water, steam), and a 3D version still in beta. What sets it apart from others is the zero-dependency Node toolkit: a geometry audit script that checks whether parts pass through each other and whether every part is mounted on a bracket, plus a headless Chrome toolset for screenshots, zoomed crops, and slow-motion contact sheets so Claude can review its own drawings. Before starting, you're also asked to estimate effort by tier: a Figure takes 30–90 minutes, a Hero takes 2–4 hours (ccleaks, 10-11). The README is blunt about it: "It is slow on purpose." It can't draw people or precise maps.

10-18 the author added printing: any figure can be exported as an A4 or Letter poster, a technical drawing, or a 2–4 page handout. No new commits have landed since (GitHub, 11-06).

### How the stars climbed

| Date | star | What happened those days |
|---|---|---|
| 10-04 to 10-06 | Repo not yet created | On X, the author builds in public: "I hand-draw isometric line-art SVGs, and I wanted high-end results without spending hours on each one, so I fed my know-how, workflow and examples into an AI skill". 37k views, 1,150 likes. The same day they posted a demo of a Raptor rocket engine hovering, coming apart, then igniting and spitting WebGL flames: 22k views. 10-06 They also posted a collection: 17k views. |
| 10-08 | Repo created |  |
| 10-10 | — | The official launch post, ending at 2.68M views, 18.2k likes, 1,594 reposts |
| 10-11 | About 99 | @MengTo (190k followers) reposted it: "Such a good skill for visual explainers," with his own prompt attached, 113k views, 3,499 bookmarks |
| 10-12 | 2,009 | Teknium announced it had been added to Hermes Agent's official skill library (59k views); @0xMovez wrote "Opus 5.5 + /anatomy skill is insane," 175k views; the same weekend, "CLAUDE CAN FINALLY GENERATE IMAGES"-style posts passed 900k views |
| **10-13** | **5,381 (+3,372, peak)** | Blogs and news aggregators started publishing long-form pieces; a community gallery launched (27k views) |
| 10-15 | — | Perplexity CEO Aravind Srinivas: "/anatomy now in Perplexity Computer for all (skill originally built by @wheresryan22)," 37k views |
| 10-16 | 12,374 |  |
| 10-17 to 10-19 | 13,714 → 15,809 | The author posted a kids' version prototype "how to inflate a tire with a hand pump": 240k views; 10-19 posted a printable PDF, 40k views |
| 10-28 | 21,618 |  |
| 11-06 | 25,198 | Last 7 days +2,656; the first 7 days +3,535. Growth is cooling, but still three or four hundred a day. |

Dates and stars come from GitHub's daily records; X view counts are as observed around 11-06. Third-party trackers don't fully agree on the numbers (CellCog's morning reading at 10-12 was 4,103 stars, while Kunal Ganglani's 10-12 reading was 6,507), because they sampled at different times. There are 2,105 forks, about 8% of stars, which suggests many people actually pulled it down and used it. The author once posted that there were "about 105k installs plus clones" (10-31), a figure no third party has verified.

Some of the fire was lit by a misreading. Many people shared it because they thought "Claude can finally draw images." In fact every picture it makes is SVG, HTML, and WebGL code. The model never outputs a single pixel. But that misreading is what pushed it out beyond developer circles. In the Chinese-speaking world there's programmer Yupi (@yupi996) and @sundyme reposting it; a Spanish-language aggregator post, "October launched, now past 6K stars, the 7 repos", drew 76k views; then there's a YouTube tutorial, "This Free Claude Skill Turns Any Idea Into a Working Machine", a Reddit post saying "saw this skill spreading on X so I tried it", and a dozen-plus blog posts. Directories like skills.sh, ui-skills.com, and trendshift also list it. It did not take off on Hacker News.

### Why this one and not the others

The clearest illustration is a project that came 4 days earlier. MrBongoC/ai-iso-skill was created 10-04 with nearly the same idea: isometric line art where parts react when clicked, output as a single HTML file. By 11-06 it had only 338 stars.

The difference comes down to three things:

1. **Output quality.** Ryan already made a living hand-drawing this kind of isometric line art. He turned his taste into rules that can be followed (four-tone shading, painting back to front, every part needs support, readouts driven by the same model), and backed them with an audit script and screenshot self-checks. A casual prompt can't reach that hit rate, and the skill's screenshots are its advertisement.

2. **The demo travels by nature.** An engine taken apart and then fired up is understandable in seconds, and people who don't code will share it too. A large share of the 2.68M views came from non-developers.

3. **Release rhythm.** He posted three half-finished teasers to build a seed following, then launched formally with one video, attaching a line of install command. Big accounts that reposted had ready-made prompts and could easily post their own drawings. After launch, a new thing came out each week (a gallery, a kids' version, PDF export), and the conversation lasted nearly a month.

Timing helped too. Agent Skills is now a cross-tool standard, and `npx skills add` installs it in one line. Opus 5.5 can draw hundreds of parts in one pass. And agent platforms were short on skills they could showcase, so within a week Perplexity, Hermes Agent, and CellCog all added it.

### Who it's competing with

| Project | Launched | star(11-06) | How it differs from Anatomy |
|---|---|---|---|
| cathrynlavery/diagram-design | 2026-04 | 65,463, +2,412 in the last 7 days | 45 editorial styles of schematics (mermaid / drawio), still box diagrams |
| nicobailon/visual-explainer | 2026-02 | 10,821 | Generates HTML pages or slides to explain diffs, plans, and data; leans toward infographics |
| QingYunA/answer-me-with-html | 2026-10-02 | 5,751 | Answers hard questions with a single HTML page, mixing text and diagrams |
| lucasmarkes/hairline | 2026-10-01 | 3,475 | Same isometric line aesthetic, but it's a React component library, not a skill |
| MrBongoC/ai-iso-skill | 2026-10-04 | 338 | Nearly the same idea and 4 days earlier, but no WebGL/3D, no audit toolkit, and no viral launch |
| Claude Artifacts, Gemini 4 interactive 3D | Already there | — | General-purpose capabilities from big companies; results depend entirely on the prompt, with no fixed method or quality control |

The "AI draws diagrams to explain things" lane is already crowded: diagram-design has more than twice Anatomy's stars and has been gaining about as fast over the last 7 days. Anatomy holds a very narrow slot inside that lane: it doesn't draw schematics, it builds a real machine.

Copycats have already appeared, and none have many stars: Garinmckayl/anima (created 10-11, turns biology concepts into interactive isometric diagrams, 250 stars), kelvinkn17's fun-isometric (105 stars), annnguyentt/anatomy-reveal-skill (3D exploded-view reveal animations, 88 stars), and diip3sh/exploded ("explodes" UI components apart, 58 stars). Swapping in a different subject while keeping the same style isn't pulling much star growth so far.

### If it were you

**One judgment** : copying an isometric skill makes no sense, since Anatomy already holds this slot and the copycats have stalled at a few hundred stars. What's worth copying is the structure: write a visual craft you genuinely know as "rules + examples + a self-check script," then launch with a video that makes sense in ten seconds.

**Who it suits** : people who already have a visual craft worth showing off, such as illustration, motion design, data journalism, architectural drawing, medical illustration, circuit diagrams, or sheet music, and who can break that craft into rules that can be checked.

**Who it doesn't suit** : people with no taste of their own who only plan to write a single prompt. ai-iso-skill and those copycat repos already show that an idea alone doesn't earn stars.

**How to do it** : pick something that neither Anatomy nor diagram-design draws, but that a single image would make people want to share (inferred: subway-map-style flowcharts, anatomically precise medical illustrations, teardown diagrams for kids, hand-drawn-style data journalism). Turn the craft into executable rules, add 20+ example pieces, and write a script that automatically catches "drawn wrong." This step takes the most effort and is the part others can't just copy.

**How to get users** : in the week before launch, post 2–3 half-finished pieces on X; for the formal launch, use one short video, with a post that includes an install command and a prompt people can copy directly; after launch, proactively @ each agent platform to try to get listed as an official skill. Repost accounts in Chinese, Spanish, and Japanese will find it on their own. After launch, publish a new use case every week.

**When to get in early** : in the months while agent platforms are still competing to add showcase-style skills (inferred: through the first half of 2027). Once each company's own image-drawing features mature, this kind of skill stops being novel.

**Signs you've misread it** : the launch post breaks 100k views but the repo still has fewer than 1,000 stars a week later; or Claude or Gemini ships a native "interactive mechanical diagram" feature that matches the skill's output from a single sentence.

[GitHub repo ↗](https://github.com/wheresryan22/anatomy)

**Research notes: competitor table, acquisition evidence, full research report**

Competitors

| Name | Where | Launched | Scale | How it differs from this one |
|---|---|---|---|---|
| cathrynlavery/diagram-design | Open source | 2026-04-16 | 65,463 star | Editorial-style block diagrams/schematics (45 kinds), not working physical machines |
| nicobailon/visual-explainer | Open source | 2026-02-16 | 10,821 star | Generates HTML pages or slides to explain diffs and plans; leans toward infographics |
| QingYunA/answer-me-with-html | Open source | 2026-10-02 | 5,751 star | Answers questions with a single HTML page, with no mechanical-metaphor or interactive physical objects |
| MrBongoC/ai-iso-skill | Open source | 2026-10-04 | 338 star | Same approach (isometric, pressable parts) and 4 days earlier, but no WebGL/3D, no audit toolkit, and no viral launch |
| lucasmarkes/hairline | Open source | 2026-10-01 | 3,475 star | React component library with the same isometric line aesthetic, not an agent skill |
| Mermaid / draw.io / PlantUML | Other | Years | huge | Diagram-as-code, can show relationships but can't explain mechanisms |
| Claude Artifacts / Gemini 4 interactive 3D visualizations | Big-company features | Already there | Very large | General-purpose on-the-spot generation, with no "machine metaphor" methodology or quality-control process |

Where users come from

- **Verified** **X author's post** : 10-10 "Introducing Anatomy" 2.68M views, 18.2k likes, 1,594 reposts; the star surge came in the 1–3 days that followed

- **Verified** **X build-in-public teasers** : 10-04 to 10-06 half-finished demo posts, with 17k to 37k views

- **Verified** **big X accounts reposting it** : MengTo, 113k views, 3.5K bookmarks; 0xMovez, 175k and 96k views; 程序员鱼皮, sundyme and a Spanish-language aggregator account, 76k views

- **Verified** **Platform adoption** : Teknium announced it as an official Hermes Agent skill (59k views); Aravind Srinivas: "/anatomy now in Perplexity Computer for all"; built into CellCog

- **Verified** **Blogs, news, SEO, skill directories** : ccleaks, CellCog, kunalganglani, emergent.sh, explainx, Medium, YouTube tutorials; listed on skills.sh, ui-skills.com, trendshift

- Inferred **Reddit / LinkedIn / Instagram reposts** : posts on r/BestGitHubRepos, r/developersPak, and others; LinkedIn reshares; Instagram posts saying "comment for the skill link" (accounts not verified)

- Inferred **Hacker News** : the hackernews database returns no related stories

## wheresryan22/anatomy: why it hit 29k stars in 25 days

> Research date 2026-11-06. Data sources: our GitHub database (repo_profile / repo_day), our X database and live X (x-radar / TikHub), GitHub API, Jina search and page text.

### Bottom line

Designer Ryan (@wheresryan22) turned his hand-drawn isometric SVG line-art skill into a Claude Code / Agent Skill: say one sentence, and it builds a working, take-apart-able isometric machine whose readouts update in real time to explain a concept. It took off because of a 2.68M-view X launch post (a visually striking demo video plus a "Claude can finally draw images" misreading that fueled it), followed by platforms like Perplexity and Hermes Agent adopting it as a built-in official skill within a week, which lent it credibility. The differentiator is "build a real machine as the explanation," backed by an engineering-grade quality toolkit. That's really why it caught fire, though the same playbook is already being copied.

### 1. What it is

- Repo created 2026-10-08, MIT, JavaScript. The README says "A Claude skill that explains an idea by building it as a real, working object"; it runs in Claude Code, Antigravity, OpenCode, Codex, and MiniMax Code. Install with `npx skills add wheresryan22/anatomy -g`, then `/anatomy explain how a token bucket rate limiter works, interactive` (README, [github.com/wheresryan22/anatomy](https://github.com/wheresryan22/anatomy)).

- The core rule sits at the top of SKILL.md: "the object is the explanation." No box diagrams or arrows; Claude is asked to invent a physical object whose operation is the concept itself: a cache key drawn as a pin-tumbler lock, a queue as a marble track, an LRU as a bookshelf that ejects the oldest book.

- It outputs three kinds of figures: SVG (four-tone shaded isometric solids, placed in cards, with live readouts), SVG + WebGL (fire, water, steam), and 3D (beta). There's also a zero-dependency Node toolkit: the geometry audit kit/audit.mjs checks whether parts pass through each other and whether every part has support; headless Chrome handles screenshots, zoomed crops, and slow-motion contact sheets so Claude can check its own work. Effort is estimated by Figure / Hero / Epic: a Figure takes 30–90 minutes, a Hero takes 2–4 hours (ccleaks 2026-10-11, [ccleaks.com/news/anatomy-claude-skill-oct-2026](https://ccleaks.com/news/anatomy-claude-skill-oct-2026)).

- Extras: the official site skills.wheresryan.sh/anatomy, the community gallery anatomy-community (93 stars), and anatomy-figures, which turns 52 figures into React components (29 stars). 10-18 added printable PDF output. As of 10-18 there have been no new commits to the repo since 2026-10-18 (our GitHub database, pushed_at).

### 2. Growth data

- Star curve (our GitHub database, repo_day): 10-11 about 99 → 10-12 2,009 → 10-13 5,381 (single-day +3,372, the highest in the observed window) → 10-16 12,374 → 10-20 16,680 → 10-28 21,618 → 11-06 25,198. Over the last 7 days +2,656, over the 7 days before that +3,535; it's cooling, though it still adds 330–430 a day. Forks 2,105, fork-to-star ratio about 8.4%.

- Third-party timestamps: CellCog logged 10-12 07:03 UTC as 4,103 stars / 323 forks (https://cellcog.ai/blog/anatomy-claude-skill/); Kunal Ganglani logged 10-12 as 6,507 stars (https://www.kunalganglani.com/blog/anatomy-claude-code-skill). These don't line up with our database numbers because the sampling times differ.

- Author 10-31 posted their own numbers: "~105k installs + clones on Anatomy (combined)" (2116301130015850552,4.8K views on X).

### 3. Where users came from (growth tactics)

1. **Pre-launch build-in-public on X** : 10-04 "I hand-draw isometric line-art SVGs for a living, and I wanted high-end results without spending hours, so I fed my knowledge, process and examples into an AI skill", 37K views, 1,150 likes; the same day a WebGL demo of a Raptor engine hover-exploding and then igniting, 22K views; 10-06 a compilation post, 16.9K views (live on X, @wheresryan22).

2. **One viral launch post** : 10-10 "Introducing Anatomy — Describe a machine in one line. Claude brings it to life." 2.68M views, 18.2k likes, 1,594 reposts (X live, 2108948624004526516,11-06). When CellCog read it, it had 10-12k bookmarks, and the star surge came 1–3 days later, 19k.

3. **Big accounts picked it up too, with ready-made prompts** : @MengTo (190k followers) 10-11 posted "Such a good skill for visual explainers" with their own prompt, 113k views, 3,499 bookmarks; @0xMovez 10-12 "Opus 5.5 + /anatomy skill is insane" 175k views, 10-15 and it got another wave, 96k views; in the Chinese-language crowd, @sundyme 14k views and @yupi (程序员鱼皮) 996 7.3K views; a Spanish-language roundup post from @Fluyeporlaweb, "6K stars, 7 repos since October", 76k views (x library / X real-time).

4. **Platforms adopted it as an official skill** : 10-12 Teknium (Nous Research) announced Anatomy joined Hermes Agent's official optional skills, `hermes skills install official/creative/anatomy`, 59k views; 10-15 Perplexity CEO @AravSrinivas posted "/anatomy now in Perplexity Computer for all (skill originally built by @wheresryan22)", 37k views (x library). CellCog also wrote a long post saying it's built in (cellcog.ai).

5. **Traffic from a misreading** : CellCog noted that posts like "CLAUDE CAN FINALLY GENERATE IMAGES" that weekend topped 900k views. It's actually code-drawn graphics, not image generation, but the claim pushed it beyond the AI crowd.

6. **Secondary spread and long-tail SEO** : a dozen-plus blogs and news aggregators (ccleaks 10-11, CellCog 10-12, kunalganglani 10-13, emergent.sh, explainx.ai, Medium, Wavect, hdatf), a YouTube tutorial "This Free Claude Skill Turns Any Idea Into a Working Machine", LinkedIn reposts, Reddit (r/BestGitHubRepos, r/developersPak "saw this skill spreading on X so I tried it"), skill directories like ui-skills.com and skills.sh, and trendshift listings (Jina search results). There are Instagram "comment 'skill' for the link" lead-gen posts (seen in Google search snippets; specific accounts unverified).

7. **The author kept shipping** : 10-13 a community gallery (27K views), 10-17 a kids' prototype "how a bike pump inflates a tire" (240k views), 10-19 printable PDFs (40k views), each stretching it a bit further toward education.

8. **No traction on HN** : searching the hackernews library for anatomy / wheresryan / isometric claude returned nothing.

### 4. Competitors

| Name | Where | Launched | Scale | How Anatomy differs |
|---|---|---|---|---|
| cathrynlavery/diagram-design | Open-source skills | 2026-04-16 | 65,463 stars, +2,412 in the last 7 days | Editorial-style diagrams (45 kinds, mermaid / drawio), still box-and-arrow diagrams, not moving physical objects |
| nicobailon/visual-explainer | Open-source skills | 2026-02-16 | 10,821 star | Generates HTML pages or slides to explain diffs, plans and data; leans toward infographics |
| QingYunA/answer-me-with-html | Open-source skills | 2026-10-02 | 5,751 star | Answers hard questions with a single HTML page, text plus illustrations, no mechanical-object metaphor |
| MrBongoC/ai-iso-skill(iso-figure) | Open-source skills | 2026-10-04 | 338 star | Nearly the same idea (isometric line art, parts react when pressed, single HTML), 4 days earlier, but no viral launch, no WebGL/3D and no audit toolkit |
| lucasmarkes/hairline | Open-source React library | 2026-10-01 | 3,475 star | Isometric line figures and shapes that move with the pointer, same aesthetic, but it's a component library, not an agent skill |
| larashero3-dotcom/lieflat-charts, imxv/Pretty-mermaid-skills, bybit-exchange/svg-diagram | Open-source skills | Launched within 2026 years | 6.7K / 1.6K / 661 star | Charts and architecture diagrams, the schematic route |
| viettranx/3dviz-pro-max, achimala/dream-loop | Open-source skills | Around 2026-09 | 1,040 / 1,807 star | Uses Three.js / Blender for 3D scenes, heavier, doesn't take the explanation-through-mechanism approach |
| Mermaid / draw.io / PlantUML | Open-source tools | Years | huge | Diagram-as-code, can show relationships but can't explain mechanisms |
| Claude Artifacts, Gemini 4 interactive 3D visualizations | Big-company features | Already there | Very large (a DeepMind 10-22 human-body 3D demo post with 310k views) | General on-the-spot generation capability, no fixed 'machine metaphor' method or quality-control workflow; results depend on the prompt |

Scale figures come from our GitHub library / GitHub API, 11-06.

### 5. Copycats

- Garinmckayl/anima (built by 10-11, 250 stars): "a Claude Code skill that turns biology concepts into interactive isometric diagrams", essentially a science-subject version of Anatomy. Reddit r/claudeskills also has "I built a Claude Code skill that turns biology prompts into interactive…".

- annnguyentt/anatomy-reveal-skill (built by 10-15, 88 stars): builds on Anatomy for 3D disassembly reveal animations, and was promoted by @0xMovez alongside Anatomy.

- fun-isometric in kelvinkn17/skills (built by 10-26, 105 stars) and diip3sh/exploded (built by 10-12, 58 stars, which 'explodes' UI components apart), both disassembly / isometric-style.

- Platforms took it in directly: Perplexity Computer, Hermes Agent, CellCog.

### 6. Why it took off

1. **The demos are built for sharing** : a rocket engine that hovers with its parts splitting apart and then fires WebGL flames on ignition. A few seconds of video makes sense to anyone, and non-coders reshared it too, so a large share of the 2.68M views came from outside developer circles.

2. **Timing** : Agent Skills had become an open cross-tool standard, installable with one `npx skills add` command, and Opus 5.5 was strong enough to draw hundreds of parts in one pass. Platforms were looking for showcase skills, so Perplexity and Hermes adopted it within a week.

3. **The author's craft is real** : he already hand-drew this kind of isometric line art and had built SF-Interface-style components. He wrote the aesthetic down as executable rules (four-tone shading, back-to-front drawing, every part needs support, readouts driven by the same model), plus audits and screenshot self-checks. A casually written prompt can't reach that hit rate.

4. **Pre-launch warm-up, then continuous output** : the teaser posts from 10-04 to 10-06 built a seed audience first; after launch came the community gallery, kids' version and PDFs, moving the conversation from showing off to education and children, and outside discussion lasted nearly a month.

5. **Zero friction, free, MIT** : no API key, no npm install, and it works across platforms without changes.

### 7. Differentiation

Similar skills all aim to make diagrams prettier (diagram-design, visual-explainer, the mermaid family). Anatomy changed the premise: instead of drawing a schematic, it builds a machine so its operation is the explanation, then uses an engineered toolkit (audits, screenshot self-checks, effort tiers) to keep the hit rate high. That difference is why it caught fire. ai-iso-skill had nearly the same idea, earlier by 4 days, but only got 338 stars, showing an idea alone isn't enough; it takes output quality plus a viral video. The moat is mainly taste and launch, though, and the code is easy to copy: biology and disassembly-animation versions have already appeared.

### 8. Visibility

It's been widely discussed: the launch post had 2.68M views; the Perplexity CEO, Teknium, MengTo and other big accounts reposted it or announced integrations; a dozen-plus blogs and news pieces, YouTube tutorials and Reddit threads covered it, and Spanish- and Chinese-language communities reposted it. It's open source and free, with no revenue line.

### 9. What others can learn

- The playbook: build in public on X with 2–3 half-finished demo posts, then formally launch with one short video, while giving a one-line install command and a ready-to-copy prompt, so big accounts that repost it can easily attach their own work.

- Product idea: package a craft from a niche (isometric illustration) as a 'rules + examples + self-check script' skill. That gets a much higher hit rate than a skill that is just a prompt, and the screenshots can spread on their own.

- You could swap the subject (biology, chemistry, medicine, finance), the audience (children's education, K-12 teaching aids; the author is already building a kids' version), or the language. If you want to charge, consider printed teaching aids or an institutional version.

### 10. Still unclear

- Real usage is unverified: the author self-reports 105k installs plus clones, with no third-party verification. A single image takes 30 minutes to hours of agent time, so many people may have installed it without really using it.

- No specific data on how much it's been reposted on Instagram / TikTok.

- Unclear whether the author plans to monetize (kids' version, education version).

- After 10-18 the repo stopped updating; unclear whether that's because he moved on to the kids' version.

This article was written by AI from public data and the data we collect daily. Numbers are sourced, and inferences are labeled.