npm install 'succeeded' but the package is not there

Error signature — confirm this is yours before buying:

Cannot find module 'X' immediately after npm i X appeared to succeed

npm · dependencies · ci · verified-in-production

Free diagnosis

When output is piped/tailed, an ERESOLVE failure can scroll past while trailing audit lines look like a normal install. The command failed; the tail looked routine.

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KnownFix · Markdown version · llms.txt · Cataloged fixes for AI agents, with explicit confidence labels.