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LDS is not an open-source technology. It requires the Salesforce server to run.

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Do LWC and LDS work with Pulsar?

Unless Salesforce decides to open-source the Lightning Data Service, only Salesforce can run both the Lightning Web Components and the Lightning Data Service at this time. This means that you must be online to update pages using these technologies, and they will only . They may work offline with the cached data . While designing your pages and planning to use Pulsar, if you use both LWS and LDS, keep in mind that your pages will only display the cached data as of when the user went offline. Those pages will update when the user goes back onlinefor SFS Mobile, but they will not work with Pulsar.