Compatibility Notes - Moira 6.8.2

Upgrade Boundary

Moira 6.8.2 is fully backward-compatible from 6.8.0 for all public Python APIs, REST routes, and transport schemas. No public signatures, parameters, or response structures were altered.

Performance and Evaluation Behavior

• Planetary Reduction Speed: Calling all_planets_at or planet_at on an instance of Moira that holds an active KernelPool (such as when small-body catalogs are discovered) now seamlessly invokes the C++ NativePlanetaryEvaluator. Planetary positions match reference DE441 reductions to $10^{-12}$ degrees while completing in under 1 millisecond.
• Graph Routing: KernelPool route discovery no longer scales linearly with reader count. Direct edge queries and candidate routes execute in $O(1)$ amortized time.
• Route Cache: KernelPool maintains an internal, thread-safe LRU route cache bounded at 512 entries. No user intervention or cache maintenance is required.

Recommended Migration Sequence

Direct drop-in upgrade from 6.8.0:

pip install --upgrade moira-astro==6.8.2

For services running moira_server:

pip install --upgrade "moira-astro[server]==6.8.2"

Restart server processes (moira-engine, moira-api) following upgrade.