diff --git a/.github/codeql/codeql-config.yml b/.github/codeql/codeql-config.yml
index bf54c670..12876372 100644
--- a/.github/codeql/codeql-config.yml
+++ b/.github/codeql/codeql-config.yml
@@ -39,6 +39,18 @@ paths-ignore:
   # fix a generator, not the file.
   - "**/*.generated.cs"
 
+  # .NET build artifacts. The `obj/` and `bin/` trees contain
+  # generated test scaffolding (xunit auto-generated entry
+  # points: `XunitAutoGeneratedEntry*.cs`) and compiler
+  # intermediates that aren't authored source. CodeQL findings
+  # here ask us to fix MSBuild's output, not the source —
+  # which is the wrong dependency direction. Empirically
+  # discovered 2026-04-28 (B-0073): two open csharp alerts on
+  # `obj/Release/net10.0/XunitAutoGenerated*.cs` were gating
+  # the LFG `code_quality:severity=all` ruleset on every PR.
+  - "**/obj/**"
+  - "**/bin/**"
+
 # Custom query packs — reserved for the follow-up round that
 # ships Zeta-specific taint / CWE rules. The formal-
 # verification-expert (Soraya) routes the rule authoring