diff --git a/Cargo.lock b/Cargo.lock
index 216fdeca4e..8b3985fc09 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3087,7 +3087,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "chrono",
  "eframe",
@@ -3113,7 +3113,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-catalog"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "chrono",
  "crc32fast",
@@ -3131,7 +3131,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-cli"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "dhat",
  "lightcraft-codecs",
@@ -3147,7 +3147,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-codecs"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "avif-serialize",
  "bytemuck",
@@ -3178,7 +3178,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-color"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-geom",
  "proptest",
@@ -3187,7 +3187,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-denoise"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "faer-core",
  "lightcraft-denoise-core",
@@ -3204,7 +3204,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-denoise-core"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-raster",
  "miniz_oxide 0.8.9",
@@ -3219,7 +3219,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-develop"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-color",
  "lightcraft-geom",
@@ -3231,7 +3231,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-engine"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "ab_glyph",
  "chrono",
@@ -3275,7 +3275,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-faces"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-testkit",
  "matrixmultiply",
@@ -3290,7 +3290,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-fetch"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "log",
  "rustls",
@@ -3301,7 +3301,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-geocode"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "miniz_oxide 0.8.9",
  "serde",
@@ -3309,7 +3309,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-geom"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "proptest",
  "serde",
@@ -3317,7 +3317,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-gpu"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "bytemuck",
  "lightcraft-color",
@@ -3337,7 +3337,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-heif"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "heic-rs",
  "rayon",
@@ -3345,14 +3345,14 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-inpaint"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "rayon",
 ]
 
 [[package]]
 name = "lightcraft-lensdb"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-develop",
  "lightcraft-geom",
@@ -3361,7 +3361,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-mcp"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-codecs",
  "lightcraft-engine",
@@ -3372,7 +3372,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-merge"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-codecs",
  "lightcraft-color",
@@ -3388,7 +3388,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-meta"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "chrono",
  "lightcraft-geom",
@@ -3401,7 +3401,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-pipeline"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "image",
  "lightcraft-color",
@@ -3419,7 +3419,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-preview"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "jpeg-encoder",
  "lightcraft-raster",
@@ -3431,7 +3431,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-raster"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "libc",
  "lightcraft-color",
@@ -3443,7 +3443,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-raw"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "dhat",
  "jpeg-encoder",
@@ -3467,7 +3467,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-scenes"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "image",
  "lightcraft-color",
@@ -3478,7 +3478,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-segment"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "candle-core",
  "candle-nn",
@@ -3492,7 +3492,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-slideshow"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "lightcraft-raster",
  "serde",
@@ -3501,15 +3501,15 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-sysmem"
-version = "0.11.0"
+version = "0.13.0"
 
 [[package]]
 name = "lightcraft-testkit"
-version = "0.11.0"
+version = "0.13.0"
 
 [[package]]
 name = "lightcraft-tiff"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "proptest",
  "serde",
@@ -3518,7 +3518,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-ui-egui"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "craft-ui",
  "egui",
@@ -3547,7 +3547,7 @@ dependencies = [
 
 [[package]]
 name = "lightcraft-web"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "crc32fast",
  "eframe",
@@ -7017,7 +7017,7 @@ checksum = "e450f9b2ed1dff33c94c12589a87338689467b9c4f5d8a5710bd09a847d2c8a7"
 
 [[package]]
 name = "xtask"
-version = "0.11.0"
+version = "0.13.0"
 dependencies = [
  "brotli",
  "flate2",
diff --git a/Cargo.toml b/Cargo.toml
index 0a0d78e5f6..ef204030ff 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,7 @@ resolver = "3"
 members = ["crates/*", "apps/*", "xtask"]
 
 [workspace.package]
-version = "0.11.0"
+version = "0.13.0"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.90"
diff --git a/README.md b/README.md
index 15f8a7d83f..c8db5a50ac 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@
 </p>
 
 
+<p align="center">
+  <img src="assets/app-icon/hicolor/256x256/apps/ai.storyteller.lightcraft.png" width="128" height="128" alt="LightCraft icon: an engraved lynx on an amber tile">
+</p>
+
 <h1 align="center">LightCraft</h1>
 
 <h3 align="center">Your photos. Your pixels. Your machine.</h3>
diff --git a/docs/showcase/run.py b/docs/showcase/run.py
index 8ea6c9fc9b..bb80e0c1cc 100644
--- a/docs/showcase/run.py
+++ b/docs/showcase/run.py
@@ -1,6 +1,21 @@
 #!/usr/bin/env python3
 """lcb.py FILE.jsonl — run control requests from a JSON-lines file ({"method":..., "params":...} or {"sleep": s})."""
 import json, socket, sys, time
+from pathlib import Path
+
+
+def _jsonl_path(arg):
+    """Resolve the CLI file argument; require an existing readable regular file."""
+    path = Path(arg).resolve()
+    if not path.is_file():
+        sys.exit(f"not a readable file: {arg}")
+    try:
+        with path.open("rb"):
+            pass
+    except OSError:
+        sys.exit(f"not a readable file: {arg}")
+    return path
+
 def call(method, params):
     s = socket.create_connection(("127.0.0.1", 7980), timeout=180)
     s.sendall((json.dumps({"id": 1, "method": method, "params": params}) + "\n").encode())
@@ -10,7 +25,7 @@ def call(method, params):
         if not c: break
         buf += c
     return json.loads(buf)
-for line in open(sys.argv[1]):
+for line in open(_jsonl_path(sys.argv[1])):
     line = line.strip()
     if not line or line.startswith("#"): continue
     r = json.loads(line)
diff --git a/sonar-project.properties b/sonar-project.properties
index d0480c0ed3..336e755db7 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -1,2 +1,3 @@
 sonar.projectKey=storytold_lightcraft
 sonar.organization=storytold
+sonar.coverage.exclusions=**/tools/**,**/docs/**,**/examples/**
diff --git a/tools/spectral_camera_table.py b/tools/spectral_camera_table.py
index b05ac28028..188f6ba4c5 100644
--- a/tools/spectral_camera_table.py
+++ b/tools/spectral_camera_table.py
@@ -19,6 +19,25 @@ import sys
 import colour
 import numpy as np
 from scipy.optimize import minimize
+from pathlib import Path
+
+
+def _existing_dir(arg):
+    """Resolve a directory CLI argument; require it to exist."""
+    path = Path(arg).resolve()
+    if not path.is_dir():
+        sys.exit(f"not a directory: {arg}")
+    return str(path)
+
+
+def _out_path(arg):
+    """Resolve an output path CLI argument; require its parent to exist."""
+    path = Path(arg).resolve()
+    if not path.parent.is_dir():
+        sys.exit(f"output directory does not exist: {arg}")
+    if path.exists() and not path.is_file():
+        sys.exit(f"output path is not a regular file: {arg}")
+    return str(path)
 
 WL = np.arange(380, 781, 5)
 D50 = colour.xy_to_XYZ(colour.CCS_ILLUMINANTS["CIE 1931 2 Degree Standard Observer"]["D50"])
@@ -119,4 +138,4 @@ def main(root, out):
 if __name__ == "__main__":
     if len(sys.argv) != 3:
         sys.exit("usage: spectral_camera_table.py <rawtoaces-data checkout> <output .rs>")
-    main(sys.argv[1], sys.argv[2])
+    main(_existing_dir(sys.argv[1]), _out_path(sys.argv[2]))