diff --git a/cspell.json b/cspell.json
index 26f4b54..e606e31 100644
--- a/cspell.json
+++ b/cspell.json
@@ -51,6 +51,7 @@
     "immich",
     "immich's",
     "importmap",
+    "incrementality",
     "janky",
     "jemalloc",
     "keepalives",
diff --git a/scripts/check-no-em-dashes.mjs b/scripts/check-no-em-dashes.mjs
index 92b25aa..78ec0d0 100644
--- a/scripts/check-no-em-dashes.mjs
+++ b/scripts/check-no-em-dashes.mjs
@@ -15,7 +15,6 @@ const textExtensions = new Set([
   '.mjs',
   '.ts',
   '.txt',
-  '.vtt',
   '.webmanifest',
   '.xml',
 ]);
diff --git a/scripts/check-no-github-links.mjs b/scripts/check-no-github-links.mjs
index d6a25c3..587de6c 100644
--- a/scripts/check-no-github-links.mjs
+++ b/scripts/check-no-github-links.mjs
@@ -29,7 +29,6 @@ const textExtensions = new Set([
   '.mjs',
   '.ts',
   '.txt',
-  '.vtt',
   '.webmanifest',
   '.xml',
 ]);
diff --git a/scripts/lib/dist.mjs b/scripts/lib/dist.mjs
index 16e9137..b4584c2 100644
--- a/scripts/lib/dist.mjs
+++ b/scripts/lib/dist.mjs
@@ -79,7 +79,6 @@ const MIME = {
   '.woff2': 'font/woff2',
   '.mp4': 'video/mp4',
   '.webm': 'video/webm',
-  '.vtt': 'text/vtt; charset=utf-8',
   '.pdf': 'application/pdf',
 };
 
diff --git a/src/components/AtAGlance.astro b/src/components/AtAGlance.astro
index 1ebdfa7..763e901 100644
--- a/src/components/AtAGlance.astro
+++ b/src/components/AtAGlance.astro
@@ -8,18 +8,16 @@ interface Props {
   projectPeriod?: string;
   stack?: string[];
   scale?: string;
-  outcome?: string;
   links?: Link[];
   headingId: string;
 }
 
-const { projectPeriod, stack = [], scale, outcome, links = [], headingId } = Astro.props;
+const { projectPeriod, stack = [], scale, links = [], headingId } = Astro.props;
 
 const rows: Array<[string, string]> = [];
 if (projectPeriod) rows.push(['Period', projectPeriod]);
 if (stack.length > 0) rows.push(['Stack', stack.join(', ')]);
 if (scale) rows.push(['Scale', scale]);
-if (outcome) rows.push(['Outcome', outcome]);
 ---
 
 {
diff --git a/src/components/PostMediaFigure.astro b/src/components/PostMediaFigure.astro
index 9277e6e..7c806ee 100644
--- a/src/components/PostMediaFigure.astro
+++ b/src/components/PostMediaFigure.astro
@@ -40,7 +40,7 @@ const videoHeight = item.type === 'video' ? (item.poster?.height ?? 720) : undef
           poster={item.poster?.src}
           width={videoWidth}
           height={videoHeight}
-          aria-label={item.alt}
+          aria-label={item.caption}
         >
           {item.webm && <source src={item.webm} type="video/webm" />}
           {item.mp4 && <source src={item.mp4} type="video/mp4" />}
@@ -50,7 +50,7 @@ const videoHeight = item.type === 'video' ? (item.poster?.height ?? 720) : undef
       item.src && (
         <Picture
           src={item.src}
-          alt={item.decorative ? '' : (item.alt ?? '')}
+          alt={item.decorative ? '' : (item.caption ?? '')}
           formats={['avif', 'webp']}
           widths={[480, 960, 1280, 1920]}
           sizes="(max-width: 700px) calc(100vw - 2 * clamp(20px, 4vw, 32px)), (max-width: 1100px) min(calc(100vw - 4rem), 56rem), 56rem"
diff --git a/src/components/VideoThumbnail.astro b/src/components/VideoThumbnail.astro
index 2d46ab9..9519120 100644
--- a/src/components/VideoThumbnail.astro
+++ b/src/components/VideoThumbnail.astro
@@ -90,7 +90,7 @@ const playScript = `
     class="video-thumbnail__play"
     type="button"
     data-video-play
-    aria-label={`Play video: ${video.alt ?? alt}`}
+    aria-label={`Play video: ${video.caption ?? alt}`}
   >
     <span class="video-thumbnail__play-icon" aria-hidden="true">
       <svg viewBox="0 0 24 24" focusable="false">
@@ -106,7 +106,7 @@ const playScript = `
     preload="none"
     playsinline
     poster={video.poster?.src}
-    aria-label={video.alt}
+    aria-label={video.caption}
     hidden
   >
     {video.webm && <source src={video.webm} type="video/webm" />}
diff --git a/src/content.config.ts b/src/content.config.ts
index dda961f..38932ef 100644
--- a/src/content.config.ts
+++ b/src/content.config.ts
@@ -72,13 +72,15 @@ const thumbnailOverrideSchema = ({ image }: SchemaContext) =>
     src: image(),
   });
 
+// The caption is the single source of truth for a media item's text: it shows
+// as the visible <figcaption> and doubles as the image alt / accessible name,
+// so meaningful media carries one string instead of a caption/alt pair.
 const mediaSchema = ({ image }: SchemaContext) =>
   z
     .discriminatedUnion('type', [
       z.object({
         type: z.enum(['image', 'diagram']),
         src: image(),
-        alt: z.string().optional(),
         decorative: z.boolean().optional(),
         caption: z.string().optional(),
         transcript: z.string().optional(),
@@ -89,7 +91,6 @@ const mediaSchema = ({ image }: SchemaContext) =>
           poster: image().optional(),
           mp4: mediaUrl.optional(),
           webm: mediaUrl.optional(),
-          alt: z.string().optional(),
           decorative: z.boolean().optional(),
           caption: z.string().optional(),
           transcript: z.string().optional(),
@@ -98,8 +99,8 @@ const mediaSchema = ({ image }: SchemaContext) =>
           message: 'Video media needs at least one mp4 or webm source.',
         }),
     ])
-    .refine((item) => item.decorative || (Boolean(item.alt) && Boolean(item.caption)), {
-      message: 'Meaningful media needs both alt text and a caption.',
+    .refine((item) => item.decorative || Boolean(item.caption), {
+      message: 'Meaningful media needs a caption.',
     });
 
 // A single collection where each entry can carry an `article` facet (a written
@@ -117,7 +118,6 @@ const articleFacet = ({ image }: SchemaContext) =>
     tags: z.array(z.enum(TAGS)).default([]),
     stack: z.array(z.string()).optional(),
     scale: z.string().min(1).optional(),
-    outcome: z.string().min(1).optional(),
     media: z.array(mediaSchema({ image })).default([]),
   });
 
diff --git a/src/layouts/Post.astro b/src/layouts/Post.astro
index 1ff7199..083a294 100644
--- a/src/layouts/Post.astro
+++ b/src/layouts/Post.astro
@@ -140,7 +140,6 @@ const personJsonLd = buildPersonJsonLd();
       projectPeriod={post.data.period}
       stack={post.data.article?.stack}
       scale={post.data.article?.scale}
-      outcome={post.data.article?.outcome}
       links={post.data.links}
     />