What is backend-development?

A guide for building backend systems with Node.js, Python, Go, or Rust, including web APIs, databases, authentication, testing, and deployment. A backend is the server-side part of an application that handles data and requests.

It is for creating REST, GraphQL, or gRPC APIs, authentication systems, database-backed services, caching, testing, CI/CD, and production monitoring.

It helps avoid common problems in server code, such as weak security, poorly designed APIs, inefficient database access, and unreliable deployment practices.

backend-development — Skill for Claude Code and Codex by nevergoodstud

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 nevergoodstudy-hub/wechat-article-summarizer --skill backend-development

Clone the repo

git clone --depth 1 https://github.com/nevergoodstudy-hub/wechat-article-summarizer

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/nevergoodstudy-hub/wechat-article-summarizer/backend-development/github.svg)](https://agentmods.dev/skills/nevergoodstudy-hub/wechat-article-summarizer/backend-development)

Your own site

<a href="https://agentmods.dev/skills/nevergoodstudy-hub/wechat-article-summarizer/backend-development"><img src="https://agentmods.dev/badge/skills/nevergoodstudy-hub/wechat-article-summarizer/backend-development/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/nevergoodstudy-hub/wechat-article-summarizer/backend-development"><img src="https://agentmods.dev/badge/skills/nevergoodstudy-hub/wechat-article-summarizer/backend-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 135 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,039 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 86% copy Near-identical to another mod 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 5.1	$0.00135	$0.01039
Opus 5	$0.00068	$0.00519
Sonnet 5	$0.00027	$0.00208
Haiku 4.5	$0.00014	$0.00104

Measured 6d ago against content hash 68e7dbc0221c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

backend-development scanned grade A with 0 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 6d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

86% identical to ck:backend-development — 5 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.warp/skills/backend-development/SKILL.md · 96 lines

How it starts

The opening of the file, as written. The whole thing — 96 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Backend Development Skill

Production-ready backend development with modern technologies, best practices, and proven patterns.

When to Use

Designing RESTful, GraphQL, or gRPC APIs
Building authentication/authorization systems
Optimizing database queries and schemas
Implementing caching and performance optimization
OWASP Top 10 security mitigation
Designing scalable microservices
Testing strategies (unit, integration, E2E)
CI/CD pipelines and deployment
Monitoring and debugging production systems

Technology Selection Guide

Languages: Node.js/TypeScript (full-stack), Python (data/ML), Go (concurrency), Rust (performance) Frameworks: NestJS, FastAPI, Django, Express, Gin Databases: PostgreSQL (ACID), MongoDB (flexible schema), Redis (caching) APIs: REST (simple), GraphQL (flexible), gRPC (performance)

See: references/backend-technologies.md for detailed comparisons

Core Technologies:

backend-technologies.md - Languages, frameworks, databases, message queues, ORMs
backend-api-design.md - REST, GraphQL, gRPC patterns and best practices

Security & Authentication:

backend-security.md - OWASP Top 10 2025, security best practices, input validation
backend-authentication.md - OAuth 2.1, JWT, RBAC, MFA, session management

Performance & Architecture:

backend-performance.md - Caching, query optimization, load balancing, scaling
backend-architecture.md - Microservices, event-driven, CQRS, saga patterns

Quality & Operations:

backend-testing.md - Testing strategies, frameworks, tools, CI/CD testing
backend-code-quality.md - SOLID principles, design patterns, clean code
backend-devops.md - Docker, Kubernetes, deployment strategies, monitoring
backend-debugging.md - Debugging strategies, profiling, logging, production debugging
backend-mindset.md - Problem-solving, architectural thinking, collaboration

Key Best Practices (2025)

Security: Argon2id passwords, parameterized queries (98% SQL injection reduction), OAuth 2.1 + PKCE, rate limiting, security headers

Read the full file on GitHub · 96 lines

Files

What ships with it

11 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.

6d ago First seen · 96 lines · 135 tokens per session scan A 68e7dbc0221c

Subscribe to this mod's changes

backend-development is a skill published in the GitHub repository nevergoodstudy-hub/wechat-article-summarizer (5 stars, last pushed 2mo ago), licensed MIT. It adds 135 tokens to every session and 1,039 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to ck:backend-development, differing in 5 lines, and is treated as a copy.

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