diff --git a/.gitignore b/.gitignore
index c9acc77..94e6e54 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@ next-env.d.ts
 # runtime data (sqlite)
 /data
 /.playwright-data
+.qa-data/
 
 # e2e artifacts
 /.auth
@@ -25,3 +26,6 @@ next-env.d.ts
 
 # real production plans dropped in for debugging stay out of git
 /plan-*.sqlplan
+
+# generated knowledge graph (regenerate with /understand)
+.ua/
diff --git a/.qa-data/qai.db b/.qa-data/qai.db
deleted file mode 100644
index 4a3492c..0000000
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diff --git a/.qa-data/qai.db-shm b/.qa-data/qai.db-shm
deleted file mode 100644
index 7d69b2e..0000000
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diff --git a/.qa-data/qai.db-wal b/.qa-data/qai.db-wal
deleted file mode 100644
index 5f905cb..0000000
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diff --git a/e0c47bcd-00af-49ae-aac4-c32a92af6f01_upscayl_4x_upscayl-standard-4x.png b/e0c47bcd-00af-49ae-aac4-c32a92af6f01_upscayl_4x_upscayl-standard-4x.png
deleted file mode 100644
index 5593a34..0000000
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diff --git a/plan-cxpaket.sqlplan b/plan-cxpaket.sqlplan
deleted file mode 100644
index 830e587..0000000
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