The following site introduced a method for installing only specific packages from CodeArtifact, but I found that this can be achieved by slightly modifying the login command without manually editing <code>$HOME/.npmrc</code>, so I'm documenting it here.
<iframe id="zenn-embedded__63a24cca03ec8" src="https://embed.zenn.studio/card#zenn-embedded__63a24cca03ec8" data-content="https%3A%2F%2Finokara.hateblo.jp%2Fentry%2F2021%2F12%2F04%2F115551" frameborder="0" scrolling="no" loading="lazy"></iframe><a href="https://inokara.hateblo.jp/entry/2021/12/04/115551" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://inokara.hateblo.jp/entry/2021/12/04/115551</a>
Simply add the <code>--namespace @mynamespace</code> option to the login command.
<div class="code-block-container"><pre class="shiki github-dark" style="background-color:#151e2c;color:#e1e4e8"><code class="code-line" data-line="6">$ aws codeartifact login --tool npm --domain my_domain --domain-owner 111122223333 --repository my_repo --namespace @mynamespace
</code></pre></div>Reference
<iframe id="zenn-embedded__876930a9f705a" src="https://embed.zenn.studio/card#zenn-embedded__876930a9f705a" data-content="https%3A%2F%2Fdocs.aws.amazon.com%2Fja_jp%2Fcodeartifact%2Flatest%2Fug%2Fcodeartifact-concepts.html%23welcome-concepts-package-namespace" frameborder="0" scrolling="no" loading="lazy"></iframe><a href="https://docs.aws.amazon.com/ja_jp/codeartifact/latest/ug/codeartifact-concepts.html#welcome-concepts-package-namespace" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://docs.aws.amazon.com/ja_jp/codeartifact/latest/ug/codeartifact-concepts.html#welcome-concepts-package-namespace</a>

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Installing only specific npm packages from AWS CodeArtifact

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