Changes

This is a follow-up to #16787.

The goal of this PR is ensure that we only get one instance of vite installed under node_modules/.

In general, it's okay to have multiple installations of the same package under node_modules/ (which is why npm is better than some other package managers like Python pip), but occasionally you do encounter some tricky TypeScript type-checking issues and JavaScript runtime instanceof issues because of this.

I made the following changes in this PR:

• Dedupe direct @types/node dep:
  • Update @types/node from v20 to v22 in language tools packages. VSCode uses Node v22 since 2025 June, so it should be safe to update this.
  • Downgrade @types/node from v25 to v22 in the CF package. It's better not to use non-LTS versions anyway.
• Dedupe indirect @types/node peer dep:
  • Enabled pnpm dedupePeers config.
  • Added pnpm override to @types/node. See the inline comment in my code for more details.

Testing

Here is how I check my work is correct:

Before:

Two instances of vite installed. One with @types/node@25.2.3 and another with @types/node@22.19.11.

$ git branch --show-current
main

# How many packages installed 
$ pnpm i
$ pnpm ls --parseable | wc -l
802

# How many vite installed 
$ pnpm -r why vite | grep -v '─'
vite@7.3.2 peer#8113 (2 variations)
vite@7.3.2 peer#cdd9 (2 variations)
Found 1 version, 2 instances of vite

# Get vite install path
$ pnpm ls --parseable | grep '.pnpm/vite@'
/node_modules/.pnpm/vite@7.3.2_@types+node@25.2.3_jiti@2.6.1_lightningcss@1.32.0_sass@1.98.0_tsx@4.21.0_yaml@2.8.3/node_modules/vite
/node_modules/.pnpm/vite@7.3.2_@types+node@22.19.11_jiti@2.6.1_lightningcss@1.32.0_sass@1.98.0_tsx@4.21.0_yaml@2.8.3/node_modules/vite

After:

Singe instance of vite installed, with @types/node@22.19.19.

$ git branch --show-current

# How many packages installed 
$ pnpm i
$ pnpm ls --parseable | wc -l
798

# How many vite installed 
$ pnpm -r why vite | grep -v '─'
vite@7.3.2
Found 1 version of vite

# Get vite install path
/node_modules/.pnpm/vite@7.3.2_@types+node@22.19.19_jiti@2.6.1_lightningcss@1.32.0_sass@1.98.0_tsx@4.21.0_yaml@2.8.3/node_modules/vite

I was thinking about adding a new test to ensure that we only have one vite installed, but it's a bit overkill, IMHO. After all, having multiple vite installations won't necessarily cause issues.

Docs

N/A