Agent skill

Project Structure

Overview of the main directories and important files in the repository.

Apache-2.0Auto-check passedDevelopment

Install Project Structure

skills CLI

$ npx skills add spiriMirror/libuipc --skill project-structure -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install spiriMirror/libuipc project-structure --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/spiriMirror/libuipc.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.cursor/skills/project-structure .claude/skills/project-structure && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "project-structure" agent skill from https://github.com/spiriMirror/libuipc/tree/main/.cursor/skills/project-structure into .claude/skills/project-structure/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-structure", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/spiriMirror/libuipc/tree/main/.cursor/skills/project-structure

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add spiriMirror/libuipc --skill project-structure -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install spiriMirror/libuipc project-structure --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/spiriMirror/libuipc.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.cursor/skills/project-structure .agents/skills/project-structure && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "project-structure" agent skill from https://github.com/spiriMirror/libuipc/tree/main/.cursor/skills/project-structure into .agents/skills/project-structure/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-structure", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add spiriMirror/libuipc --skill project-structure -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install spiriMirror/libuipc project-structure --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/spiriMirror/libuipc.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.cursor/skills/project-structure .cursor/skills/project-structure && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "project-structure" agent skill from https://github.com/spiriMirror/libuipc/tree/main/.cursor/skills/project-structure into .cursor/skills/project-structure/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-structure", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/spiriMirror/libuipc.git --path .cursor/skills/project-structure

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add spiriMirror/libuipc --skill project-structure -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install spiriMirror/libuipc project-structure --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/spiriMirror/libuipc.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.cursor/skills/project-structure .gemini/skills/project-structure && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "project-structure" agent skill from https://github.com/spiriMirror/libuipc/tree/main/.cursor/skills/project-structure into .gemini/skills/project-structure/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-structure", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install spiriMirror/libuipc project-structure

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add spiriMirror/libuipc --skill project-structure -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/spiriMirror/libuipc.git skills-src && mkdir -p .github/skills && cp -r skills-src/.cursor/skills/project-structure .github/skills/project-structure && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "project-structure" agent skill from https://github.com/spiriMirror/libuipc/tree/main/.cursor/skills/project-structure into .github/skills/project-structure/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-structure", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add spiriMirror/libuipc --skill project-structure -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install spiriMirror/libuipc project-structure --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/spiriMirror/libuipc.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.cursor/skills/project-structure .opencode/skills/project-structure && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "project-structure" agent skill from https://github.com/spiriMirror/libuipc/tree/main/.cursor/skills/project-structure into .opencode/skills/project-structure/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "project-structure", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: project-structure
GitHub stars: 335
Token cost: ~823 tokens
SKILL.md length: 348 words
Files: 1
Skills in repo: 16
Repo updated: Oct 3, 2026
First seen: Oct 7, 2026
Licence: Apache-2.0

At a glance

Overview of the main directories and important files in the repository.

Development work in your project
SKILL.md covers Top-Level Directories and Subfolder Purposes
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Project Structure is an agent skill from spiriMirror/libuipc. Overview of the main directories and important files in the repository. Use this to understand the project layout and find where code lives.

Its SKILL.md is about 820 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development. It works with Python, C++ and CUDA. The repository describes itself as: A Modern Python and C++20 Library of Unified Incremental Potential Contact. The licence is Apache-2.0.

When your agent uses it

Development work in your project

Example prompts

“/project-structure”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit 9c748a7. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Project Structure loads about 823 tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 348 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~40
When it runs · the whole SKILL.md, loaded when a task matches: ~823

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from spiriMirror/libuipc at commit 9c748a7, republished under its Apache-2.0 licence (© spiriMirror). 348 words, ~823 tokens.

Download SKILL.mdSave it as .claude/skills/project-structure/SKILL.md (or your agent's skills folder).

name: project-structure
description: Overview of the main directories and important files in the repository. Use this to understand the project layout and find where code lives.

Project Structure Guide

Overview of the main directories and important files in the repository.

Top-Level Directories

apps/ - C++ apps, benchmarks, examples, and tests (see apps/CMakeLists.txt).
assets/ - Scene assets and simulation data.
cmake/ - Shared CMake utilities and macros.
docs/ - Documentation, specs, and site assets.
include/ - Public C++ headers.
output/ - Generated outputs from simulations. (the contents is ignored by git)
python/ - Python package, tests, and metadata.
libuipc-samples/ - Tracked git submodule containing Python examples, benchmarks, and sample assets.
scripts/ - Utility scripts and notebooks.
src/ - Core C++ implementation.
xmake/ - XMake rules and build helpers.

Subfolder Purposes

`apps/`

app/ - Shared app utilities and test helpers.
benchmarks/ - Benchmark executables.
examples/ - Example applications (each in its own subfolder).
tests/ - C++ test suites grouped by feature area.

`assets/`

scenes/ - Scene README and references.
sim_data/ - Mesh assets (linemesh/, tetmesh/, trimesh/).

`docs/`

build_install/ - Build and install guides.
development/ - Developer docs and diagrams.
specification/ - API/spec references and constitutions.
tutorial/ - Tutorial content and media.
overrides/ - MkDocs HTML overrides.
stylesheets/ - Docs CSS.
javascripts/ - Docs JS.
media/ - Images for docs pages.
misc/ - Miscellaneous documentation.

`include/`

uipc/ - Public headers grouped by module (backend, core, geometry, io, etc.). The removed C++ GUI has no public header tree.

`python/`

src/uipc/ - Pure python code to enhance the C++ pybind11 bindings.
tests/ - Python test suite.

`scripts/`

optional_import/ - Optional dependency loaders.
symbol_calculation/ - Symbolic derivation notebooks and helpers.
SymEigen/ - SymEigen utilities, notebooks, and tests.

`src/`

backends/ - Backend implementations (common/, cuda/, none/).
- common/ - Common utilities for all backends.
- cuda/ - CUDA backend with CUDA kernels.
- none/ - An empty backend that does nothing, as a template for creating a new backend or checking the basic functionality.
geometry/metis/ - Private C++ METIS implementation and required GKlib-derived support code, built as uipc_metis for mesh partitioning.
constitution/ - Physical constitution implementations.
core/ - Core engine systems and modules.
geometry/ - Geometry algorithms and data types.
io/ - Serialization and I/O.
pybind/ - C++/Python bindings.
sanity_check/ - Internal scene sanity checks to ensure the correctness of scene before the simulation.
usd/ - USD integration.
vdb/ - VDB integration.

The supported visualization frontend is the pure-Python polyscope layer at python/src/uipc/gui.py. CMake is the primary build; XMake currently has known option/module drift documented in agent_docs/07-build-test-workflow.md and agent_docs/12-secondary-modules-samples-and-docs.md.

Files

Just SKILL.md in .cursor/skills/project-structure of spiriMirror/libuipc.

Open the folder on GitHubat commit 9c748a7

Compare with similar skills

Project Structure next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Project Structure compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Project Structure this skillspiriMirror/libuipc	335	—	~823	Automated safety check: Pass	Apache-2.0	5 days ago
ExecuTorch Build Guidepytorch/executorch	5.1k	—	~2.3k	Automated safety check: Notes	Custom licence	today
Cutlass Cpp Kernelvipshop/cache-dit	1.3k	—	~2.2k	Automated safety check: Pass	Apache-2.0	9 days ago
AI ReviewPaddlePaddle/Paddle	24k	—	~303	Automated safety check: Pass	Apache-2.0	8 days ago
Mpk Internalsmirage-project/mirage	2.5k	—	~5.4k	Automated safety check: Pass	Apache-2.0	today
Paddle BuildPaddlePaddle/Paddle	24k	—	~1k	Automated safety check: Pass	Apache-2.0	8 days ago

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Questions about Project Structure

What does Project Structure do?

Overview of the main directories and important files in the repository. Project Structure is an agent skill from spiriMirror/libuipc. Overview of the main directories and important files in the repository.

When should I use Project Structure?

Project Structure fits situations like: development work in your project.

How do I install Project Structure in Claude Code?

Run `npx skills add spiriMirror/libuipc --skill project-structure -a claude-code`. Or copy the skill folder (.cursor/skills/project-structure in spiriMirror/libuipc) into .claude/skills/project-structure in your project. Claude Code loads it when a task matches its description.

How do I install Project Structure in Codex?

Run `npx skills add spiriMirror/libuipc --skill project-structure -a codex`. Or copy the skill folder (.cursor/skills/project-structure in spiriMirror/libuipc) into .agents/skills/project-structure in your project. Codex loads it when a task matches its description.

Can I use Project Structure in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add spiriMirror/libuipc --skill project-structure -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/project-structure, .gemini/skills/project-structure, .github/skills/project-structure and .opencode/skills/project-structure in your project.

What does Project Structure need to run?

SKILL.md names no scripts, command-line tools or credentials: Project Structure is instructions for the agent only. Our summary lists: Python 3.

Does Project Structure access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Project Structure safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Project Structure use?

Project Structure is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Project Structure use?

About 823 tokens (SKILL.md is roughly 3.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Project Structure?

Skills that share tags, products or a category with Project Structure: ExecuTorch Build Guide (pytorch/executorch, 5.1k stars), Cutlass Cpp Kernel (vipshop/cache-dit, 1.3k stars), AI Review (PaddlePaddle/Paddle, 24k stars) and Mpk Internals (mirage-project/mirage, 2.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Project Structure?

spiriMirror (a GitHub organization) maintains it in spiriMirror/libuipc, which has 335 GitHub stars. The repository holds 16 skills in this directory. The repository was last updated on October 3, 2026.

Source: spiriMirror/libuipc on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Project Structure

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Project Structure Guide

Top-Level Directories

Subfolder Purposes

apps/

assets/

docs/

include/

python/

scripts/

src/

Files

Compare with similar skills

Similar skills

More from spiriMirror/libuipc

Related

Questions about Project Structure

`apps/`

`assets/`

`docs/`

`include/`

`python/`

`scripts/`

`src/`