# Description of Changes
Moves `RelationalDB` and related database code into a new
`spacetimedb-engine` crate.
The main motivation is to tighten dependency control around the engine
layer and isolate `RelationalDB`
behind a crate boundary.
- Majority of this PR is code-motion.
- Removes direct production dependence on `tokio` from
`spacetimedb-engine`.
- Keeps `tokio` only as a dev-dependency for test-only code in
`spacetimedb-engine`.
- This is intended to be a structural refactor only and should not
result in any functional change in
production.
- Adds a CI check to ensure `spacetimedb-engine` continues to compile in
simulation mode
# API and ABI breaking changes
NA
# Expected complexity level and risk
1.5.
# Testing
Existing tests should be enough.
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Co-authored-by: clockwork-labs-bot <clockwork-labs-bot@users.noreply.github.com>
Shubham Mishra