Stub out custom metrics docs

astro.config.mjs

@@ -53,6 +53,10 @@ export default defineConfig({
           label: 'Blobs',
           autogenerate: { directory: 'reference/blobs' }
         },
+        {
+          label: 'Custom Metrics',
+          autogenerate: { directory: 'reference/custom-metrics' }
+        },
         {
           label: 'Functions',
           autogenerate: { directory: 'reference/functions' }

src/content/docs/reference/custom-metrics/performance.mdx

@@ -0,0 +1,12 @@
+---
+title: Performance custom metric
+description: Reference docs for the feature struct
+---
+
+_Appears in: [`custom_metrics` struct](/reference/structs/custom-metrics/)_
+
+TODO
+
+## Schema
+
+TODO

src/content/docs/reference/structs/custom-metrics.mdx

@@ -0,0 +1,16 @@
+---
+title: Custom metrics struct
+description: Reference docs for the custom metrics struct
+---
+
+_Appears in: [`pages` table](/reference/tables/pages/)_
+
+TODO
+
+## Schema
+
+TODO
+
+### performance
+
+See the [`performance` custom metric](/reference/custom-metrics/performance/) for more information.

src/content/docs/reference/tables/pages.mdx

@@ -131,7 +131,9 @@ JSON-encoded summarization of the page-level data
 
 ### `custom_metrics`
 
-JSON-encoded test results of the custom metrics	
+JSON-encoded test results of the custom metrics.
+
+See the [`custom metrics`](/reference/structs/custom-metrics/) reference for more details.
 
 ### `lighthouse`
 
@@ -153,4 +155,4 @@ See the [`technology`](/reference/structs/technology/) reference for more detail
 
 Additional metadata about the test
 
-See the [`metadata`](/reference/blobs/page-metdata/) reference for more details.
+See the [`metadata`](/reference/blobs/page-metdata/) reference for more details.