Borrowing it
Nothing to install: this file belongs to asbis/ShapeItUp. 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/asbis/ShapeItUp/master/CLAUDE.mdgit clone --depth 1 https://github.com/asbis/ShapeItUpWrote 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/asbis/shapeitup/claude-md)<a href="https://agentmods.dev/instructions/asbis/shapeitup/claude-md"><img src="https://agentmods.dev/badge/instructions/asbis/shapeitup/claude-md/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/asbis/shapeitup/claude-md"><img src="https://agentmods.dev/badge/instructions/asbis/shapeitup/claude-md.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 | $0.03896 | $0.03896 |
| Opus 5.5 | $0.01558 | $0.01558 |
| Sonnet 5.5 | $0.00779 | $0.00779 |
| Haiku 4.5 | $0.00390 | $0.00390 |
Grade B, and why
ShapeItUp CLAUDE.md scanned grade B with 1 finding 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 1mo 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
Registered globally in `~/.claude/settings.json`. Viewer-related tools: How it starts
The opening of the file, as written. The whole thing — 257 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ShapeItUp — Project Context for Claude
What is this?
ShapeItUp is a scripted CAD tool built as a VS Code extension. Users write .shape.ts TypeScript files using the Replicad library (OpenCascade WASM), and the extension renders them in a Three.js 3D viewer. It includes an MCP server so Claude Code can create, modify, and visually verify CAD models.
Tech Stack
- TypeScript — everything (extension, viewer, worker, MCP server, shape scripts)
- Replicad (npm:
replicad) — CAD library wrapping OpenCascade compiled to WASM - Three.js — 3D rendering in VS Code webview
- esbuild — builds all packages + bundles
.shape.tsfiles at runtime (resolves local imports) - pnpm workspaces — monorepo package management
- Node 24+ required
Architecture
Extension Host (Node.js) Webview (Browser) Web Worker (Browser)
┌──────────────────┐ ┌─────────────────┐ ┌──────────────────┐
│ File watcher │──────→│ Three.js viewer │──────→│ OCCT WASM │
│ esbuild bundler │ │ Orbit controls │ │ Replicad │
│ Export to disk │←──────│ Edge rendering │←──────│ Script execution │
│ MCP bridge │ │ Params sliders │ │ Tessellation │
└──────────────────┘ └─────────────────┘ └──────────────────┘
Script execution flow:
- User saves
part.shape.ts - Extension host bundles it with
esbuild.build()(resolves local imports, keepsreplicadexternal) - Sends bundled JS to webview via postMessage
- Webview forwards to Web Worker
- Worker rewrites
import {...} from "replicad"→ destructures from pre-loaded module - Worker executes script, calls
main(), gets Shape3D (or array of parts) - Worker tessellates → mesh arrays (vertices, normals, triangles, edges)
- Posts arrays as Transferable buffers back to webview
- Webview builds THREE.BufferGeometry + LineSegments, renders
Project Structure
packages/
extension/ — VS Code extension host (commands, file watching, webview provider)
viewer/ — Three.js 3D viewer (runs in webview)
worker/ — OCCT WASM + Replicad script execution (runs in web worker)
mcp-server/ — Claude Code MCP server (stdio)
serve/ — Standalone HTTP+WS viewer host (browser instead of webview)
shared/ — Shared types, message defs, viewer HTML template, bundle spec
examples/ — Example .shape.ts files
skills/ — Claude Code skill (skills/<name>/SKILL.md layout)
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.
- 1mo ago Changed · +2 lines · +192 tokens per session eb30dcf71729
- 2mo ago First seen · 255 lines · 3,704 tokens per session scan B 031eacbfb568
ShapeItUp CLAUDE.md is an instructions file published in the GitHub repository asbis/ShapeItUp (6 stars, last pushed 17d ago), licensed MIT. It adds 3,896 tokens to every session, about $0.0156 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.