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nestjs-modules-di

nestjs-modules-di is a skill for Claude Code from dkmqflx/nestjs-best-practices-plugin. It costs 53 tokens per session (445 once invoked), scanned A, original, MIT.

Guidance for organizing NestJS modules and connecting their services through dependency injection, where the framework supplies required objects automatically. It covers feature boundaries, shared providers, configurable modules, and circular dependencies.

In plain words
What is it for?
Use it when creating modules or providers, deciding what to export, building configurable libraries, choosing injection scopes, defining custom providers, or resolving circular dependencies.
Why use it?
It helps prevent tangled module relationships, accidental provider visibility, and inefficient service lifetimes.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the nestjs-best-practices plugin — 12 skills shipped together

not rated 1repo 3mo ago A scan 53 tokens original MIT

Good fit Use it when creating modules or providers, deciding what to export, building configurable libraries, choosing injection scopes, defining custom providers, or resolving circular dependencies.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/dkmqflx/nestjs-best-practices-plugin/nestjs-modules-di
View source ↗ dkmqflx/nestjs-best-practices-plugin
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 dkmqflx/nestjs-best-practices-plugin --skill nestjs-modules-di
Clone the repo
git clone --depth 1 https://github.com/dkmqflx/nestjs-best-practices-plugin

Made for: Claude Code.

Or install nestjs-best-practices, the plugin that ships this one along with the rest of its 12 skills.

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 nestjs-modules-di

README.md
[![agentmods](https://agentmods.dev/badge/skills/dkmqflx/nestjs-best-practices-plugin/nestjs-modules-di/github.svg)](https://agentmods.dev/skills/dkmqflx/nestjs-best-practices-plugin/nestjs-modules-di)
Your own site
<a href="https://agentmods.dev/skills/dkmqflx/nestjs-best-practices-plugin/nestjs-modules-di"><img src="https://agentmods.dev/badge/skills/dkmqflx/nestjs-best-practices-plugin/nestjs-modules-di/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 nestjs-modules-di

Your own site · 80×15
<a href="https://agentmods.dev/skills/dkmqflx/nestjs-best-practices-plugin/nestjs-modules-di"><img src="https://agentmods.dev/badge/skills/dkmqflx/nestjs-best-practices-plugin/nestjs-modules-di.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 445 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 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00053 $0.00445
Opus 5.5 $0.00021 $0.00178
Sonnet 5.5 $0.00011 $0.00089
Haiku 4.5 $0.00005 $0.00044

Measured 1mo ago against content hash 91a4859806f5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

nestjs-modules-di 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 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.

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.

plugins/nestjs-best-practices/skills/nestjs-modules-di/SKILL.md · 38 lines

What it actually says

NestJS Modules & Dependency Injection

Best-practices reference for organizing NestJS applications into encapsulated feature modules and wiring providers through the IoC container correctly. Covers module boundaries, provider visibility, dynamic modules, injection scopes, custom provider tokens, and circular dependencies.

When to Apply

  • Designing or reviewing @Module structure and feature boundaries
  • Registering providers and deciding what to export
  • Building configurable libraries with forRoot/forRootAsync
  • Choosing an injection scope (singleton vs REQUEST vs TRANSIENT)
  • Wiring custom providers (useClass/useValue/useFactory) and injection tokens
  • Resolving or avoiding circular dependencies
  • Deciding whether a module should be @Global()

Rules

  • feature-module-boundaries - one module per feature/domain; keep providers encapsulated
  • export-shared-providers - only providers listed in exports are visible to importing modules
  • dynamic-modules-forroot - configure reusable modules via forRoot/forRootAsync returning DynamicModule
  • injection-scopes-default-singleton - prefer default singleton scope; REQUEST scope bubbles up and hurts performance
  • custom-provider-tokens - use useClass/useValue/useFactory with injection tokens and interfaces
  • constructor-injection - prefer constructor injection over property injection
  • avoid-circular-dependencies - restructure first; use forwardRef only as a last resort
  • global-module-sparingly - reserve @Global() for truly cross-cutting modules (config, logger)

How to Use

Read individual rule files in rules/ for explanation + incorrect/correct examples.

Files

What ships with it

8 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.

  1. 1mo ago First seen · 38 lines · 53 tokens per session scan A 91a4859806f5

Subscribe to this mod's changes

nestjs-modules-di is a skill published in the GitHub repository dkmqflx/nestjs-best-practices-plugin (1 stars, last pushed 3mo ago), licensed MIT. It adds 53 tokens to every session and 445 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Backend and APIsClaude Codeagent-skillsai-coding-assistantclaude-code-plugincodexgemini-cli
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