backend-patterns

backend-patterns is a skill for Claude Code, Codex from sejongjeong/runai-mcp. It costs 31 tokens per session (3,335 once invoked), scanned A, original, no licence file.

A guide to backend architecture, API design, database optimization, and server-side practices for Node.js, Express, and Next.js API routes.

In plain words
What is it for?
Use it to structure backend code, design APIs, improve database work, and build server routes.
Why use it?
It helps you make consistent choices when building and improving the part of an application that runs on the server.

Skill for Claude CodeCodex

Written for Claude Code and Codex: installed under .claude/, but also agents/openai.yaml present.

Good fit Use it to structure backend code, design APIs, improve database work, and build server routes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sejongjeong/runai-mcp/backend-patterns
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.

Any agent
npx skills add sejongjeong/runai-mcp --skill backend-patterns
Clone the repo
git clone --depth 1 https://github.com/sejongjeong/runai-mcp

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for backend-patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/sejongjeong/runai-mcp/backend-patterns.svg)](https://agentmods.dev/skills/sejongjeong/runai-mcp/backend-patterns)
Your own site
<a href="https://agentmods.dev/skills/sejongjeong/runai-mcp/backend-patterns"><img src="https://agentmods.dev/badge/skills/sejongjeong/runai-mcp/backend-patterns.svg" alt="Measured on agentmods" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,335 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00031 $0.03335
Opus 5 $0.00015 $0.01667
Sonnet 5 $0.00006 $0.00667
Haiku 4.5 $0.00003 $0.00333

Measured 4d ago against content hash 952e95fd7e8d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

backend-patterns scanned grade A 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 4d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

const requests = this.requests.get(identifier) || []
.claude/skills/backend-patterns/SKILL.md · 599 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

1 file 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.

  1. 4d ago First seen · 599 lines · 31 tokens per session scan A 952e95fd7e8d

Subscribe to this mod's changes

backend-patterns is a skill published in the GitHub repository sejongjeong/runai-mcp (0 stars, last pushed 5mo ago), with no licence file. It adds 31 tokens to every session and 3,335 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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