Deno 2.0 introduces the 'deno add' subcommand for managing package dependencies with subpaths, preferring npm dependencies in package.json to improve dependency management.
The new deno remove subcommand allows for quick removal of dependencies, and the lockfile format has been updated to v4, minimizing diffs and ensuring reproducible builds.
Error messaging has improved in Deno 2.0, providing clear hints for common issues like incorrectly formatted relative imports, streamlining the development process for Deno users.
Regarding permissions, Deno 2.0 raises Notcapable instead of PermissionDenied for certain errors, allowing for easier differentiation between OS-level issues and Deno errors.
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