neanes · danielgarthur · Jun 18, 2026 · Jun 2, 2026 · Jun 2, 2026 · Jun 2, 2026
diff --git a/docs/_media/Neanes.otf b/docs/_media/Neanes.otf
diff --git a/docs/font-metadata.md b/docs/font-metadata.md
@@ -137,6 +137,59 @@ This section contains the advance widths of all the glyphs.
 }
 ```
 
+## contextualSubstitutions
+
+This section lists contextual substitutions. If OpenType contextual substitution support is unavailable, this section can be used to select replacement glyphs and their metadata. Each item in `inputGlyphs`, `backtrackGlyphs`, and `lookaheadGlyphs` is a class of matching glyphs. The `index` in a substitution identifies the item in `inputGlyphs` that should be replaced.
+
+```js
+{
+  ...
+  "contextualSubstitutions": [
+    {
+      "inputGlyphs": [
+        [
+          "yporroi"
+        ]
+      ],
+      "backtrackGlyphs": [],
+      "lookaheadGlyphs": [
+        [
+          "gorgonAbove",
+          "gorgonDottedLeft",
+          "gorgonDottedRight"
+        ]
+      ],
+      "substitutions": [
+        {
+          "index": 0,
+          "from": "yporroi",
+          "to": "yporroi.gorgon"
+        }
+      ]
+    }
+  ],
+  ...
+}
+```
+
+## glyphSpacing
+
+This section contains the leading and trailing whitespace for each glyph, including substituted glyphs.
+
+```js
+{
+  ...
+  "glyphSpacing": {
+    "yporroi.gorgon": {
+      "leading": 0.074,
+      "trailing": 0.163
+    },
+    ...
+  },
+  ...
+}
+```
+
 ## glyphBBoxes
 
 This section contains the bounding box of each glyph.

diff --git a/fonts/Neanes.otf b/fonts/Neanes.otf
diff --git a/fonts/NeanesRTL.otf b/fonts/NeanesRTL.otf
diff --git a/fonts/NeanesStathisSeries.otf b/fonts/NeanesStathisSeries.otf