Configure Stryker.NET for the ACL in solution mode (Acl.slnx), so both
Acl.Application and Acl.Infrastructure — the two projects under test — are
mutated while Acl.Api (untested) is skipped. Record the repo-wide mutation
baseline as the ratchet (CLAUDE.md §5): observed score 95%, enforced break
threshold 90% (one-mutant headroom over the ~20-mutant surface). The ACL is the
first service with branching logic, so it sets the baseline; later slices
ratchet it up deliberately, never down.
Add a `mutation` make target (`dotnet tool restore` + `dotnet stryker`) and wire
it into the `make ci` aggregate, keeping `make ci` an exact mirror of the
pipeline.
Refs #47.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Niek Otten
6ac2fca384