backend-patterns

backend-patterns is a skill for Claude Code, Codex from deepelementlab/clawcode. It costs 31 tokens per session (3,327 once invoked), scanned A, original, GPL-3.0.

A guide to designing server-side software with Node.js, Express, and Next.js API routes, including APIs, databases, and common architecture patterns.

In plain words
What is it for?
Use it when building or reviewing Node.js backends, Express services, or Next.js API routes, especially when planning APIs or improving database queries.
Why use it?
It helps you make backend decisions consistently and avoid recurring problems in API structure, database performance, and server code.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it when building or reviewing Node.js backends, Express services, or Next.js API routes, especially when planning APIs or improving database queries.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/deepelementlab/clawcode/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 deepelementlab/clawcode --skill backend-patterns
Clone the repo
git clone --depth 1 https://github.com/deepelementlab/clawcode

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/deepelementlab/clawcode/backend-patterns/github.svg)](https://agentmods.dev/skills/deepelementlab/clawcode/backend-patterns)
Your own site
<a href="https://agentmods.dev/skills/deepelementlab/clawcode/backend-patterns"><img src="https://agentmods.dev/badge/skills/deepelementlab/clawcode/backend-patterns/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.

agentmods 80×15 button for backend-patterns

Your own site · 80×15
<a href="https://agentmods.dev/skills/deepelementlab/clawcode/backend-patterns"><img src="https://agentmods.dev/badge/skills/deepelementlab/clawcode/backend-patterns.svg" alt="Reviewed on agentmods" width="80" 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 3,327 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 $0.03327
Opus 5.5 $0.00012 $0.01331
Sonnet 5.5 $0.00006 $0.00665
Haiku 4.5 $0.00003 $0.00333

Measured 1mo ago against content hash f4944cc2a64b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 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.

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) || []
clawcode/plugin/builtin_plugins/clawcode-skills/skills/backend-patterns/SKILL.md · 598 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 1mo ago First seen · 598 lines · 31 tokens per session scan A f4944cc2a64b

Subscribe to this mod's changes

backend-patterns is a skill published in the GitHub repository deepelementlab/clawcode (126 stars, last pushed 4mo ago), licensed GPL-3.0. It adds 31 tokens to every session and 3,327 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

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