diff --git a/.gitignore b/.gitignore
index 81e58352..8573a914 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,11 +3,13 @@
 
 # Claude Code session artifacts.
 .claude/
+.ai/
 
 # Stray executables produced by ad-hoc `ww build` runs in the project
 # root. Real source for these lives under selfhost/test/ as .ww files.
 /loop
 /sym_link
+/memiotest
 
 # Per-module build artifacts. The .combined.ww files under selfhost/
 # are intentionally tracked — they're frozen bootstrap inputs.