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 sessions/session_20260921_233144_367389/preprocessing/chain-prior-m18-lowcurvature-v1/native/rerun/appearance_spline_prior.rrd filter=lfs diff=lfs merge=lfs -text
 sessions/session_20260921_233144_367389/preprocessing/chain-prior-stronger-reprojection-v2/native/rerun/appearance_spline_prior.rrd filter=lfs diff=lfs merge=lfs -text
+sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/rerun/appearance_spline_prior.rrd filter=lfs diff=lfs merge=lfs -text
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diff --git a/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/hybrid.json b/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/hybrid.json
new file mode 100644
index 0000000000000000000000000000000000000000..f0f5be5103514cb17e9ab584c7f1ec2dd347d594
--- /dev/null
+++ b/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/hybrid.json
@@ -0,0 +1,24 @@
+{
+  "status": "ok",
+  "settings": {
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+    "numpy_seed": 0,
+    "points_per_triangle": 30
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+  "outputs": {
+    "counts": {
+      "observed": 26339,
+      "mesh": 51840,
+      "total": 78179,
+      "mesh_to_observed": 1.968184061657618
+    },
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+}
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diff --git a/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/review.json b/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/review.json
new file mode 100644
index 0000000000000000000000000000000000000000..b805cb6c6a8fbb934d3e052d849412f8a833bf99
--- /dev/null
+++ b/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/review.json
@@ -0,0 +1,65 @@
+{
+  "status": "ok",
+  "settings": {
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diff --git a/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/tube.json b/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/tube.json
new file mode 100644
index 0000000000000000000000000000000000000000..93ab1ac44fd31535e0a0738624d04796f8fd4ed7
--- /dev/null
+++ b/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/steps/tube.json
@@ -0,0 +1,63 @@
+{
+  "status": "ok",
+  "settings": {
+    "radius_m": 0.00475,
+    "step_t": 0.125,
+    "step_angle_deg": 30
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+      "watertight": true,
+      "components": 1,
+      "winding_consistent": true,
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+    "files": {
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\ No newline at end of file
diff --git a/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/tube/geometry.npz b/sessions/session_20260921_233144_367389/preprocessing/chain-prior-v1/native/tube/geometry.npz
new file mode 100644
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new file mode 100644
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