Use CSnakes when Python is a function call, not a service
Embed a small typed Python capability in .NET when an HTTP service would be more boundary than value.
Csharp
Use IHttpClientFactory
Create configured HttpClient instances through the factory instead of scattering clients and handlers.
Cache GET responses only when user context is clear
Do not cache a GET response unless the cache key matches the user, tenant, and permission boundary that shaped it.
Assign least-privilege Azure roles, not broad contributor rights
Give workloads and people the narrow Azure role they need instead of defaulting to Contributor.
Avoid hidden allocations in hot paths
Watch for small per-item allocations inside loops, parsers, serializers, and request paths.
Do not hide exceptions inside fire-and-forget tasks
If work can fail, give it ownership, logging, cancellation, and a lifecycle.
Expose a Python FastAPI AI tool as an Aspire service
Keep Python AI code behind an HTTP boundary and let Aspire wire it into the local system.
Keep model name and deployment name in config
Do not hard-code model routing decisions into application logic.
Keep vector search filters separate from semantic ranking
Use filters for eligibility and ranking for relevance instead of blending both concerns.
Measure before you optimize
Use traces, counters, profiles, and focused benchmarks before changing code for performance.