Serena MCP is mandatory for code (read-only here). First call mcp__serena__initial_instructions to load the Serena tool manual, then use Serena for ALL code reading / searching / navigation — prefer symbol navigation (get_symbols_overview / find_symbol / find_referencing_symbols) over whole-file reads.

.NET performance review (read-only scan)

A static, read-only anti-pattern scanner for the {{ProductName}} .NET API — it reports, it does not edit. Pairs with the architect-backend review and microbenchmarking (to confirm a fix with evidence). Aligns with our coding-standards.md and async-discipline rules.

Inputs: the source to scan (required); hot-path context + target framework (.NET 10); depth = critical-only / standard (default) / comprehensive.