I’d like to qualify `--experimental-prepare-for-indexing` independently of background indexing using `swift build`. Because of this, I think there is value in using SourceKit-LSP using background indexing but without `--experimental-prepare-for-indexing`. It could also be useful to determine if bugs we may find are due to `--experimental-prepare-for-indexing` or also occur when running plain `swift build` commands.
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