diff --git a/.gitignore b/.gitignore
index ab9e8b0..95e1fec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,11 @@ node_modules/
 
 # Build output (compiled TypeScript)
 dist/
+build/
+
+# Proof artifacts and generated reports (do not commit)
+lifecycle-proof/
+reports/
 
 # Runtime state (regenerated by RECON)
 # .ste/state/ - Only track README.md (ignore all other files)