What is shared-setup-patterns?

A shared collection of setup templates and checks used by several project-initialisation commands. It includes security checks, Claude Code folder templates, and patterns for recognising project languages and frameworks.

Use it when creating or configuring Python, JavaScript, existing, exploratory, or user-level projects, especially for adding safety hooks and standard project files.

It keeps common setup behaviour consistent and avoids repeating the same configuration in every setup command.

shared-setup-patterns — Skill by stefan-jansen

Install

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.

agentmods

npx agentmods add skills/stefan-jansen/claude-code-toolkit/shared-setup-patterns

Any agent

npx skills add stefan-jansen/claude-code-toolkit --skill shared-setup-patterns

Clone the repo

git clone --depth 1 https://github.com/stefan-jansen/claude-code-toolkit

Made for: Claude Code, Codex.

Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 587 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 2 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00033	$0.00587
Opus 5	$0.00016	$0.00293
Sonnet 5	$0.00007	$0.00117
Haiku 4.5	$0.00003	$0.00059

Measured 2d ago against content hash 37f510f42d08, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

shared-setup-patterns scanned grade B with 2 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 2d 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.

Asks for rootlowPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

- **PreToolUse**: Blocks dangerous commands (rm -rf, sudo, chmod 777)

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Recursive force deletemediumDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- **PreToolUse**: Blocks dangerous commands (rm -rf, sudo, chmod 777)

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

plugins/setup/skills/shared-setup-patterns/SKILL.md · 85 lines

How it starts

The opening of the file, as written. The whole thing — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Shared Setup Patterns

Purpose: Common configuration patterns and templates shared across all project setup commands.

Used by: /setup:python, /setup:javascript, /setup:existing, /setup:explore, /setup:user

Token Impact: Provides ~1,700 tokens of shared templates loaded once, avoiding duplication across 5+ commands (saves ~3,200 tokens through reuse).

This skill contains ONLY patterns shared by multiple setup commands:

Security Hooks - PreToolUse and PostToolUse hooks for all project types
Claude Framework Structure - .claude/ directory templates and memory files
Framework Detection - Patterns for auto-detecting project languages and frameworks

Language-specific templates (Python, JavaScript, etc.) are kept inline in their respective commands.

1. Security Hooks

Located: templates/security_hooks.json

Comprehensive security and quality hooks configuration:

PreToolUse: Blocks dangerous commands (rm -rf, sudo, chmod 777)
PostToolUse: Auto-formats code (ruff, prettier, eslint), validates JSON/markdown

Used by: ALL setup commands that create projects

2. Claude Framework Structure

Located: templates/claude_framework/

Templates for .claude/ directory structure:

structure.md - Directory layout and purpose
memory_templates/ - project_state.md, dependencies.md, conventions.md, decisions.md
work_structure.md - Work directory organization

Used by: ALL setup commands

3. Framework Detection Patterns

Located: templates/framework_detection.md

Patterns for auto-detecting:

Languages: Python, JavaScript/TypeScript, Go, Rust
Frameworks: FastAPI, Django, Flask, Next.js, React, Express
Tools: pytest, Jest, Mocha, go test, cargo test

Used by: /setup:existing, /setup (if dispatcher exists)

Usage Pattern

Commands reference this skill in frontmatter:

skills: [shared-setup-patterns]

Then access specific templates:

Security hooks: Load from templates/security_hooks.json
Framework structure: Generate from templates/claude_framework/ templates
Detection: Use patterns from templates/framework_detection.md

Read the full file on GitHub · 85 lines

Files

What ships with it

7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

2d ago First seen · 85 lines · 33 tokens per session scan B 37f510f42d08

Subscribe to this mod's changes

shared-setup-patterns is a skill published in the GitHub repository stefan-jansen/claude-code-toolkit (85 stars, last pushed 1mo ago), licensed MIT. It adds 33 tokens to every session and 587 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 2 findings (asks for root, recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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