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The issue was that npm packages used in user code (via npm: specifiers) weren't being cached during setup, causing "read-only file system" errors at execution time when Deno tried to download and cache them. Changes: - Add cacheMainModule() function that runs `deno cache` on the main module during setup, resolving all imports including npm: specifiers - Remove --node-modules-dir flag from installDependencies() as it's not needed for npm: specifier support and may cause caching issues - Main module caching runs after explicit dependency installation and ensures all transitive dependencies are available at execution time
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The issue was that npm packages used in user code (via npm: specifiers) weren't being cached during setup, causing "read-only file system" errors at execution time when Deno tried to download and cache them.
Changes:
deno cacheon the main module during setup, resolving all imports including npm: specifiers