dynamic-import

dynamic-import is a skill for Claude Code from ncaq/konoka. It costs 25 tokens per session (559 once invoked), scanned A, original, Apache-2.0.

A TypeScript and JavaScript import guide that prefers normal, top-level imports over import(), which loads modules at runtime. It lists cases where runtime loading is appropriate, such as deliberate page splitting.

In plain words
What is it for?
Use it when writing or reviewing imports, deciding whether code should load lazily, or handling conditional, variable-path, or circular dependencies.
Why use it?
It keeps dependencies easier for tools and readers to understand and supports type checking, refactoring, and unused-code detection.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Part of the web-tasuke plugin — 17 skills shipped together

Good fit Use it when writing or reviewing imports, deciding whether code should load lazily, or handling conditional, variable-path, or circular dependencies.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ncaq/konoka/dynamic-import
View source ↗ ncaq/konoka
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 ncaq/konoka --skill dynamic-import
Clone the repo
git clone --depth 1 https://github.com/ncaq/konoka

Made for: Claude Code.

Or install web-tasuke, the plugin that ships this one along with the rest of its 17 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 dynamic-import

README.md
[![agentmods](https://agentmods.dev/badge/skills/ncaq/konoka/dynamic-import/github.svg)](https://agentmods.dev/skills/ncaq/konoka/dynamic-import)
Your own site
<a href="https://agentmods.dev/skills/ncaq/konoka/dynamic-import"><img src="https://agentmods.dev/badge/skills/ncaq/konoka/dynamic-import/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 dynamic-import

Your own site · 80×15
<a href="https://agentmods.dev/skills/ncaq/konoka/dynamic-import"><img src="https://agentmods.dev/badge/skills/ncaq/konoka/dynamic-import.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 25 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 559 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 $0.00025 $0.00559
Opus 5 $0.00013 $0.00280
Sonnet 5 $0.00005 $0.00112
Haiku 4.5 $0.00003 $0.00056

Measured 4d ago against content hash 3e47a98117ba, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

dynamic-import 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 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.

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/web-tasuke/skills/dynamic-import/SKILL.md · 70 lines

What it actually says

dynamic importを避ける

原則

TypeScript/JavaScriptコードでは通常の静的importを使うこと。 import()(dynamic import)はデフォルトでは使用禁止。

// Good
import { foo } from "./foo";

// Bad: 読み込まれることが確定しているのにdynamic importしている
const { foo } = await import("./foo");

理由

  • 静的importは依存関係がツールやバンドラにとって明確になる
  • 型チェック、リファクタリング、未使用検出などの静的解析が効きやすい
  • トップレベルで依存が宣言されるためコードが読みやすい
  • 不要なモジュールはバンドラのツリーシェイキングで除去される

dynamic importが許可される場合

以下のケースではimport()を使ってよいです。

ルートベースのコード分割(lazy page import)

SPAのページ単位の分割など、バンドラのチャンク分割を意図する場合。

// ルート単位のコード分割
const AdminPage = lazy(() => import("./pages/AdminPage.tsx"));

条件付きで読み込まれるモジュール

実行時の条件によって読み込み自体をスキップできる場合。

// 開発モード専用のデバッグツール
if (process.env.NODE_ENV === "development") {
  const { installDevTools } = await import("heavy-dev-tools");
  installDevTools();
}

実行時にしかモジュールパスが決定しない場合

プラグインシステムやロケールファイルの動的読み込みなど。

バンドルしてデプロイしづらくなるためそもそも仕組みごと避けたい話ですが、 存在するときは仕方がありません。

// ロケールに応じた翻訳ファイルの読み込み
const messages = await import(`./locales/${locale}.ts`);

循環依存の回避がどうしても必要な場合

設計の見直しを先に検討すること。 それでも解決できない場合のみ許可。

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 · 70 lines · 25 tokens per session scan A 3e47a98117ba

Subscribe to this mod's changes

dynamic-import is a skill published in the GitHub repository ncaq/konoka (3 stars, last pushed yesterday), licensed Apache-2.0. It adds 25 tokens to every session and 559 once invoked, about $0.0001 per session on Opus 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 2026-09-05.

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