[Divergence] Sync-rules package adds a Rust schema generator (powersync-service #789)

[benitav]

What's changing: The @powersync/service-sync-rules package, which backs the CLI's generate schema command and the PowerSync Dashboard's client schema generation, adds a rust schema generator that outputs an app_schema() function matching the Rust SDK's expected shape, with table and column names escaped.

High priority — existing docs are now inaccurate or incomplete
None identified. The Rust SDK Reference already shows a hand-written schema.rs example in the same shape this generator produces, so nothing existing is contradicted.

For reviewer consideration — worth documenting

• PowerSync CLI (https://docs.powersync.com/tools/cli), "1. Define the Client-Side Schema" section and the Common Commands table: powersync generate schema --output= now accepts rust as a supported output type. No page lists the full set of supported output languages, so this is a new capability rather than a correction.
• Rust SDK Reference (https://docs.powersync.com/client-sdks/reference/rust), "1. Define the Client-Side Schema" section: the existing schema.rs example is hand-written; worth noting readers can now generate this file automatically via the CLI or Dashboard, as already described for the other SDKs through the shared "Generate schema automatically" callout.

Source PR: powersync-ja/powersync-service#789 — merged 2026-09-09.

Filed automatically by Claude Code (claude-sonnet-5). A human must verify the scope, prepare the docs PR, and publish it only once this update has been released.