New: 98,000+ skills indexed from GitHub repos with 100+ stars · every skill safety-checkedBrowse top skillsTop skills
Esc to closeBrowse all skills
Submit a skillBrowse skills
Submit a skillBrowse skills

Agent skill

Project Architecture

by extra-org in extra-org/extra

Foundational rules and layout for the declarative agent platform.

MITAuto-check passed

Install Project Architecture

skills CLI
$ npx skills add extra-org/extra --skill project-architecture -a claude-code

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

GitHub CLI
$ gh skill install extra-org/extra project-architecture --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/extra-org/extra.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/project-architecture .claude/skills/project-architecture && 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/

Facts

Skill name
project-architecture
GitHub stars
113
Token cost
~619 tokens
SKILL.md length
268 words
Files
1
Skills in repo
14
Repo updated
First seen
Licence
MIT

At a glance

Foundational rules and layout for the declarative agent platform.

  • SKILL.md covers When to use this skill, Files to read first, Architecture rules and Implementation rules, plus 2 more sections
  • Calls make

What it does

Project Architecture is an agent skill from extra-org/extra. Foundational rules and layout for the declarative agent platform. Read this before any change, regardless of area; it anchors every other skill.

Its SKILL.md is about 620 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: Turn your product into an AI-powered assistant. The licence is MIT.

Example prompts

  • “/project-architecture”

What it can do on your machine

Read from SKILL.md and the folder at commit 023b0a0. 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

    Shell commands in SKILL.md call:

    • make

    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 Architecture loads about 619 tokens when it runs. Until then it costs about 41 tokens; SKILL.md has 268 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~41
When it runs · the whole SKILL.md, loaded when a task matches
~619

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 extra-org/extra at commit 023b0a0, republished under its MIT licence (© extra-org). 268 words, ~619 tokens.

Download SKILL.mdSave it as .claude/skills/project-architecture/SKILL.md (or your agent's skills folder).
name
project-architecture
description
Foundational rules and layout for the declarative agent platform. Read this before any change, regardless of area; it anchors every other skill.
generated
true
source
.ai/skills/project-architecture.md
<!--
This file is generated by tools/skills.
Do not edit this file directly.
Edit .ai/skills/project-architecture.md and run `make generate-ai`.
-->

Skill: Project Architecture

When to use this skill

Always. Read this before any change, regardless of area. It anchors every other skill in the project's non-negotiable rules and layout.

Files to read first

  • AGENTS.md
  • docs/ARCHITECTURE.md
  • docs/ROADMAP.md
  • docs/adr/

Architecture rules

  • The pipeline is one-directional: config.yml → validate → compile → CompiledAgentGraph → RuntimeEngine → ExecutionContext (per request) → execution → response + trace.
  • YAML is declarative specification, never executable business logic.
  • Validate before compile; compile before run. The runtime sees only compiled, typed models — never raw YAML dicts.
  • RuntimeEngine is created once at startup; ExecutionContext is per request.
  • Client-specific auth/business logic lives in customer plugins, not the runtime.
  • Prompts are templates rendered per request; security is enforced at the tool/data layer, not via prompt text.
  • Secrets never live in YAML or prompts.

Implementation rules

  • Follow the planned package layout in AGENTS.md (src/agentplatform/<layer>). No giant single-file modules.
  • Keep each module to one architectural responsibility.
  • Respect layer boundaries: a layer depends only on the typed outputs of the layers before it.
  • Do not change public contracts (YAML schema, plugin contracts, API shape) without an ADR and approval.
  • Stay within the current task's scope; propose new tasks for discovered work.

Validation checklist

  • Change fits the layered architecture and the planned layout.
  • No architecture rule from AGENTS.md §3 is violated.
  • No contract changed without an ADR.
  • Tests added for new behavior.
  • make check passes.

Common mistakes to avoid

  • Reading raw YAML in the runtime instead of compiled models.
  • Adding request state to RuntimeEngine or the compiled graph.
  • Putting customer auth/business logic in the runtime.
  • Expanding scope beyond the current task or doing large uncontrolled rewrites.
  • Relying on prompt wording for security.

© extra-org, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .claude/skills/project-architecture of extra-org/extra.

Open the folder on GitHubat commit 023b0a0

Compare with similar skills

Project Architecture 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 Architecture compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Project Architecture this skillextra-org/extra113—~619Automated safety check: PassMIT
Tabler Page Layoutstabler/tabler42k—~1.5kAutomated safety check: PassMIT
Motion Foundationsaffaan-m/ECC275k1 repos~2.4kAutomated safety check: PassMIT
Makepad Layoutsickn33/agentic-awesome-skills47k2 repos~1.3kAutomated safety check: PassMIT
Proposal Foundation LayoutOptima-CityU/LLM4AD_Next570—~1.8kAutomated safety check: PassBSD-3-Clause
Declarative Agentsgithub/awesome-copilot40k1 repos~1.2kAutomated safety check: PassMIT

Similar skills

  • Tabler Page Layouts

    tabler/tabler

    Picks and configures the right layout for a Tabler preview page and covers changing or adding layouts in shared/layouts, including DefaultLayout props and the page-header slot.

    42k GitHub stars~1.5k tokensUpdated yesterday
    Frontend & DesignAuto-check passed

  • Motion Foundations

    affaan-m/ECC

    Motion tokens, spring presets, performance rules, device adaptation, accessibility enforcement, and SSR safety for React / Next.js using motion/react.

    275k GitHub starsUsed in 1 repo~2.4k tokens
    Frontend & DesignAuto-check passed

  • Makepad Layout

    sickn33/agentic-awesome-skills

    CRITICAL: Use for Makepad layout system. An agent skill from sickn33/agentic-awesome-skills.

    47k GitHub starsUsed in 2 repos~1.3k tokens
    Auto-check passed

  • Proposal Foundation Layout

    Optima-CityU/LLM4AD_Next

    A skill your agent uses when establishing a research proposal's project foundation, submission constraints, and presentation system before section drafting begins.

    570 GitHub stars~1.8k tokensUpdated 5 days ago
    Auto-check passed

  • Declarative Agents

    github/awesome-copilot

    Official

    Complete development kit for Microsoft 365 Copilot declarative agents with three comprehensive workflows (basic, advanced, validation), TypeSpec support, and Microsoft 365 Agents Toolkit integration

    40k GitHub starsUsed in 1 repo~1.2k tokens
    Documents & OfficeAuto-check passed

  • Layout

    rshankras/claude-code-apple-skills

    SwiftUI layout beyond stacks — the Layout protocol (when custom layout beats GeometryReader), Grid vs lazy grids, custom containers with sections and container values, and lazy-stack/ScrollView…

    783 GitHub stars~1.8k tokensUpdated 2 mo ago
    MobileAuto-check passed

More from extra-org/extra

All 14 skills in this repo

  • Testing

    extra-org/extra

    How to write and run fast, deterministic, behavior-focused pytest tests that never touch real external systems.

    113 GitHub stars~1.2k tokensUpdated 1 mo ago
    Auto-check passed

  • Architecture Review

    extra-org/extra

    Guard the project's architecture invariants. An agent skill from extra-org/extra.

    113 GitHub stars~1.1k tokensUpdated 1 mo ago
    Auto-check passed

  • Documentation

    extra-org/extra

    Keep the repository's documentation accurate, honest, and synchronized with the code.

    113 GitHub stars~848 tokensUpdated 1 mo ago
    Auto-check passed

  • Senior Python Engineering

    extra-org/extra

    The standard for writing Python here — small, typed, explicit, testable modules with side effects pushed to the edges.

    113 GitHub stars~1.4k tokensUpdated 1 mo ago
    Auto-check passed

  • Skill Authoring

    extra-org/extra

    How to create or restructure a skill so the .ai/skills/ system stays consistent, operational, and trustworthy.

    113 GitHub stars~1k tokensUpdated 1 mo ago
    Auto-check passed

  • Code Review

    extra-org/extra

    Senior-level code review for the agent platform — architecture and boundaries first, then correctness, security, testability, and simplicity.

    113 GitHub stars~1.3k tokensUpdated 1 mo ago
    Auto-check passed

Questions about Project Architecture

What does Project Architecture do?

Foundational rules and layout for the declarative agent platform. Project Architecture is an agent skill from extra-org/extra. Foundational rules and layout for the declarative agent platform.

How do I install Project Architecture in Claude Code?

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

How do I install Project Architecture in Codex?

Run `npx skills add extra-org/extra --skill project-architecture -a codex`. Or copy the skill folder (.claude/skills/project-architecture in extra-org/extra) into .agents/skills/project-architecture in your project. Codex loads it when a task matches its description.

Can I use Project Architecture 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 extra-org/extra --skill project-architecture -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-architecture, .gemini/skills/project-architecture, .github/skills/project-architecture and .opencode/skills/project-architecture in your project.

What does Project Architecture need to run?

Going by SKILL.md and its folder, Project Architecture needs the command-line tools its instructions call (make).

Does Project Architecture 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 Architecture 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 Architecture use?

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

How many tokens does Project Architecture use?

About 619 tokens (SKILL.md is roughly 2.5k 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 Architecture?

Skills that share tags, products or a category with Project Architecture: Tabler Page Layouts (tabler/tabler, 42k stars), Motion Foundations (affaan-m/ECC, 275k stars), Makepad Layout (sickn33/agentic-awesome-skills, 47k stars) and Proposal Foundation Layout (Optima-CityU/LLM4AD_Next, 570 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Project Architecture?

extra-org (a GitHub organization) maintains it in extra-org/extra, which has 113 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 7, 2026.

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