diff --git a/.gitignore b/.gitignore
index 6a07037..2a9ebf2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,3 +12,41 @@ data/headshots/_thumbs/
 # ComfyUI on-demand generated portraits (per-worker unique). Cached on first
 # request; fully regeneratable via /headshots/generate/:key.
 data/headshots_gen/
+
+# Runtime data — all regeneratable from inputs or accumulated by daemons.
+# Anything under data/_<name>/ is internal state (auditor outputs, KB caches,
+# pathway memory snapshots, HNSW trial results, etc.). Anything under
+# data/datasets/ or data/vectors/ is generated by ingest/index pipelines.
+data/_*/
+data/lance/
+data/datasets/
+data/vectors/
+data/demo/
+data/evidence/
+data/face_test/
+data/headshots_role_pool/
+data/icons_pool/
+data/scored-runs/
+data/workspaces/
+data/catalog/
+data/**/*.bak-*
+data/**/*.pre-*-bak
+
+# Logs
+logs/
+
+# Build artifacts
+node_modules/
+exports/
+mcp-server/data/
+
+# Per-run distillation reports (timestamp-named); keep the parent dir tracked
+# via .gitkeep if needed but don't carry every batch's report set.
+reports/distillation/[0-9]*/
+reports/distillation/*-*-*-*-*/
+
+# Test scratch — scratchpads, traces, sessions are regenerated each run.
+# PRD/scenario fixtures stay tracked (they ARE the test).
+tests/agent_test/_*
+tests/agent_test/sessions/
+tests/real-world/runs/