diff --git a/astro.config.mjs b/astro.config.mjs
index 010034a..81fd1c7 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -13,7 +13,8 @@ export default defineConfig({
   markdown: {
     remarkPlugins: [[remarkObsidian, { slugMap }], remarkMath],
     rehypePlugins: [rehypeKatex],
-    // single dark theme — the site is fixed-dark to match blog.c0smere.net
-    shikiConfig: { theme: 'github-dark' },
+    // single dark theme — the site is fixed-dark to match blog.c0smere.net;
+    // -default variant's #0d1117 ground sits closer to the page's #0b0d12
+    shikiConfig: { theme: 'github-dark-default' },
   },
 });
diff --git a/deploy/build.sh b/deploy/build.sh
index 83847f1..1764abe 100755
--- a/deploy/build.sh
+++ b/deploy/build.sh
@@ -5,6 +5,13 @@ set -eu
 
 VAULT="${VAULT:-/home/nox/docker/obsidian/vaults/weeslahw_coppermind}"
 
+# footer build stamp: the node container has no git, so resolve the
+# commit here ("+" = dirty tree, e.g. a local-state build after a failed pull)
+COMMIT=$(git rev-parse --short HEAD 2>/dev/null || echo '')
+if [ -n "$COMMIT" ] && ! git diff --quiet 2>/dev/null; then
+    COMMIT="${COMMIT}+"
+fi
+
 # --user: build artifacts (node_modules, dist, public/assets) must stay
 # owned by the invoking user, or the next git pull can't write the tree
 docker run --rm \
@@ -12,6 +19,7 @@ docker run --rm \
     -v "$(pwd):/app" \
     -v "$VAULT:/content:ro" \
     -e GARDEN_CONTENT=/content/Digital_Garden \
+    -e GARDEN_COMMIT="$COMMIT" \
     -e ASTRO_TELEMETRY_DISABLED=1 \
     -e HOME=/tmp \
     -e npm_config_cache=/tmp/.npm \
diff --git a/package-lock.json b/package-lock.json
index 47171ba..199dfcd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,12 +8,15 @@
       "name": "garden-astro",
       "version": "0.1.0",
       "dependencies": {
+        "@fontsource/jetbrains-mono": "^5.3.0",
+        "@resvg/resvg-js": "^2.6.2",
         "astro": "^5.0.0",
         "github-slugger": "^2.0.0",
         "katex": "^0.16.10",
         "mermaid": "^11.0.0",
         "rehype-katex": "^7.0.0",
         "remark-math": "^6.0.0",
+        "satori": "^0.28.2",
         "unist-util-visit": "^5.0.0"
       }
     },
@@ -597,6 +600,15 @@
         "node": ">=18"
       }
     },
+    "node_modules/@fontsource/jetbrains-mono": {
+      "version": "5.3.0",
+      "resolved": "https://registry.npmjs.org/@fontsource/jetbrains-mono/-/jetbrains-mono-5.3.0.tgz",
+      "integrity": "sha512-fqDfB5I9f1p1TV486aUgB9t8zP84P0O1FtQR5Ol9vjwPy+S+EIGlVYm1cvj2W5shcZMTg2nZFdVMoH5wFu8a1A==",
+      "license": "OFL-1.1",
+      "funding": {
+        "url": "https://github.com/sponsors/ayuhito"
+      }
+    },
     "node_modules/@iconify/types": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/@iconify/types/-/types-2.0.0.tgz",
@@ -1149,6 +1161,233 @@
       "integrity": "sha512-70wQhgYmndg4GCPxPPxPGevRKqTIJ2Nh4OkiMWmDAVYsTQ+Ta7Sq+rPevXyXGdzr30/qZBnyOalCszoMxlyldQ==",
       "license": "MIT"
     },
+    "node_modules/@resvg/resvg-js": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js/-/resvg-js-2.6.2.tgz",
+      "integrity": "sha512-xBaJish5OeGmniDj9cW5PRa/PtmuVU3ziqrbr5xJj901ZDN4TosrVaNZpEiLZAxdfnhAe7uQ7QFWfjPe9d9K2Q==",
+      "license": "MPL-2.0",
+      "engines": {
+        "node": ">= 10"
+      },
+      "optionalDependencies": {
+        "@resvg/resvg-js-android-arm-eabi": "2.6.2",
+        "@resvg/resvg-js-android-arm64": "2.6.2",
+        "@resvg/resvg-js-darwin-arm64": "2.6.2",
+        "@resvg/resvg-js-darwin-x64": "2.6.2",
+        "@resvg/resvg-js-linux-arm-gnueabihf": "2.6.2",
+        "@resvg/resvg-js-linux-arm64-gnu": "2.6.2",
+        "@resvg/resvg-js-linux-arm64-musl": "2.6.2",
+        "@resvg/resvg-js-linux-x64-gnu": "2.6.2",
+        "@resvg/resvg-js-linux-x64-musl": "2.6.2",
+        "@resvg/resvg-js-win32-arm64-msvc": "2.6.2",
+        "@resvg/resvg-js-win32-ia32-msvc": "2.6.2",
+        "@resvg/resvg-js-win32-x64-msvc": "2.6.2"
+      }
+    },
+    "node_modules/@resvg/resvg-js-android-arm-eabi": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-android-arm-eabi/-/resvg-js-android-arm-eabi-2.6.2.tgz",
+      "integrity": "sha512-FrJibrAk6v29eabIPgcTUMPXiEz8ssrAk7TXxsiZzww9UTQ1Z5KAbFJs+Z0Ez+VZTYgnE5IQJqBcoSiMebtPHA==",
+      "cpu": [
+        "arm"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@resvg/resvg-js-android-arm64": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-android-arm64/-/resvg-js-android-arm64-2.6.2.tgz",
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+      "cpu": [
+        "arm64"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
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+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-darwin-arm64/-/resvg-js-darwin-arm64-2.6.2.tgz",
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+      "cpu": [
+        "arm64"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@resvg/resvg-js-darwin-x64": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-darwin-x64/-/resvg-js-darwin-x64-2.6.2.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
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+      }
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+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-linux-arm-gnueabihf/-/resvg-js-linux-arm-gnueabihf-2.6.2.tgz",
+      "integrity": "sha512-YIV3u/R9zJbpqTTNwTZM5/ocWetDKGsro0SWp70eGEM9eV2MerWyBRZnQIgzU3YBnSBQ1RcxRZvY/UxwESfZIw==",
+      "cpu": [
+        "arm"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
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+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-linux-arm64-gnu/-/resvg-js-linux-arm64-gnu-2.6.2.tgz",
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+        "arm64"
+      ],
+      "libc": [
+        "glibc"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
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+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-linux-arm64-musl/-/resvg-js-linux-arm64-musl-2.6.2.tgz",
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+        "arm64"
+      ],
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+        "musl"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
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+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-linux-x64-gnu/-/resvg-js-linux-x64-gnu-2.6.2.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "libc": [
+        "glibc"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
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+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-linux-x64-musl/-/resvg-js-linux-x64-musl-2.6.2.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "libc": [
+        "musl"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@resvg/resvg-js-win32-arm64-msvc": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-win32-arm64-msvc/-/resvg-js-win32-arm64-msvc-2.6.2.tgz",
+      "integrity": "sha512-7C/RSgCa+7vqZ7qAbItfiaAWhyRSoD4l4BQAbVDqRRsRgY+S+hgS3in0Rxr7IorKUpGE69X48q6/nOAuTJQxeQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@resvg/resvg-js-win32-ia32-msvc": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-win32-ia32-msvc/-/resvg-js-win32-ia32-msvc-2.6.2.tgz",
+      "integrity": "sha512-har4aPAlvjnLcil40AC77YDIk6loMawuJwFINEM7n0pZviwMkMvjb2W5ZirsNOZY4aDbo5tLx0wNMREp5Brk+w==",
+      "cpu": [
+        "ia32"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
+    "node_modules/@resvg/resvg-js-win32-x64-msvc": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/@resvg/resvg-js-win32-x64-msvc/-/resvg-js-win32-x64-msvc-2.6.2.tgz",
+      "integrity": "sha512-ZXtYhtUr5SSaBrUDq7DiyjOFJqBVL/dOBN7N/qmi/pO0IgiWW/f/ue3nbvu9joWE5aAKDoIzy/CxsY0suwGosQ==",
+      "cpu": [
+        "x64"
+      ],
+      "license": "MPL-2.0",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">= 10"
+      }
+    },
     "node_modules/@rollup/pluginutils": {
       "version": "5.4.0",
       "resolved": "https://registry.npmjs.org/@rollup/pluginutils/-/pluginutils-5.4.0.tgz",
@@ -1608,6 +1847,22 @@
       "integrity": "sha512-83yeghZ2xxin3Nj8z1NMd/NCuca+gsYXswywDy5bHvwlWL8tpTQmzGeUuHd9FC3E/SBEMvzJRwWEOz5gGes9Qg==",
       "license": "MIT"
     },
+    "node_modules/@shuding/opentype.js": {
+      "version": "1.4.0-beta.0",
+      "resolved": "https://registry.npmjs.org/@shuding/opentype.js/-/opentype.js-1.4.0-beta.0.tgz",
+      "integrity": "sha512-3NgmNyH3l/Hv6EvsWJbsvpcpUba6R8IREQ83nH83cyakCw7uM1arZKNfHwv1Wz6jgqrF/j4x5ELvR6PnK9nTcA==",
+      "license": "MIT",
+      "dependencies": {
+        "fflate": "^0.7.3",
+        "string.prototype.codepointat": "^0.2.1"
+      },
+      "bin": {
+        "ot": "bin/ot"
+      },
+      "engines": {
+        "node": ">= 8.0.0"
+      }
+    },
     "node_modules/@types/d3": {
       "version": "7.4.3",
       "resolved": "https://registry.npmjs.org/@types/d3/-/d3-7.4.3.tgz",
@@ -2197,6 +2452,15 @@
       "integrity": "sha512-kwDPIFCGx0NZHog36dj+tHiwP4QMzsZ3AgMViUBKI0+V5n4U0ufTCUMhnQ04diaRI8EX/QcPfql7zlhZ7j4zgg==",
       "license": "MIT"
     },
+    "node_modules/base64-js": {
+      "version": "0.0.8",
+      "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-0.0.8.tgz",
+      "integrity": "sha512-3XSA2cR/h/73EzlXXdU6YNycmYI7+kicTxks4eJg2g39biHR84slg2+des+p7iHYhbRg/udIS4TD53WabcOUkw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/boolbase": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
@@ -2237,6 +2501,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/camelize": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/camelize/-/camelize-1.0.1.tgz",
+      "integrity": "sha512-dU+Tx2fsypxTgtLoE36npi3UqcjSSMNYfkqgmoEhtZrraP5VWq0K7FkWVTYa8eMPtnU/G2txVsfdCJTn9uzpuQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
     "node_modules/ccount": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/ccount/-/ccount-2.0.1.tgz",
@@ -2340,6 +2613,12 @@
         "node": ">=6"
       }
     },
+    "node_modules/color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "license": "MIT"
+    },
     "node_modules/comma-separated-tokens": {
       "version": "2.0.3",
       "resolved": "https://registry.npmjs.org/comma-separated-tokens/-/comma-separated-tokens-2.0.3.tgz",
@@ -2402,6 +2681,36 @@
         "uncrypto": "^0.1.3"
       }
     },
+    "node_modules/css-background-parser": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/css-background-parser/-/css-background-parser-0.1.0.tgz",
+      "integrity": "sha512-2EZLisiZQ+7m4wwur/qiYJRniHX4K5Tc9w93MT3AS0WS1u5kaZ4FKXlOTBhOjc+CgEgPiGY+fX1yWD8UwpEqUA==",
+      "license": "MIT"
+    },
+    "node_modules/css-box-shadow": {
+      "version": "1.0.0-3",
+      "resolved": "https://registry.npmjs.org/css-box-shadow/-/css-box-shadow-1.0.0-3.tgz",
+      "integrity": "sha512-9jaqR6e7Ohds+aWwmhe6wILJ99xYQbfmK9QQB9CcMjDbTxPZjwEmUQpU91OG05Xgm8BahT5fW+svbsQGjS/zPg==",
+      "license": "MIT"
+    },
+    "node_modules/css-color-keywords": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/css-color-keywords/-/css-color-keywords-1.0.0.tgz",
+      "integrity": "sha512-FyyrDHZKEjXDpNJYvVsV960FiqQyXc/LlYmsxl2BcdMb2WPx0OGRVgTg55rPSyLSNMqP52R9r8geSp7apN3Ofg==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/css-gradient-parser": {
+      "version": "0.0.17",
+      "resolved": "https://registry.npmjs.org/css-gradient-parser/-/css-gradient-parser-0.0.17.tgz",
+      "integrity": "sha512-w2Xy9UMMwlKtou0vlRnXvWglPAceXCTtcmVSo8ZBUvqCV5aXEFP/PC6d+I464810I9FT++UACwTD5511bmGPUg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=16"
+      }
+    },
     "node_modules/css-select": {
       "version": "5.2.2",
       "resolved": "https://registry.npmjs.org/css-select/-/css-select-5.2.2.tgz",
@@ -2418,6 +2727,17 @@
         "url": "https://github.com/sponsors/fb55"
       }
     },
+    "node_modules/css-to-react-native": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/css-to-react-native/-/css-to-react-native-3.2.0.tgz",
+      "integrity": "sha512-e8RKaLXMOFii+02mOlqwjbD00KSEKqblnpO9e++1aXS1fPQOpS1YoqdVHBqPjHNoxeF2mimzVqawm2KCbEdtHQ==",
+      "license": "MIT",
+      "dependencies": {
+        "camelize": "^1.0.0",
+        "css-color-keywords": "^1.0.0",
+        "postcss-value-parser": "^4.0.2"
+      }
+    },
     "node_modules/css-tree": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/css-tree/-/css-tree-3.2.1.tgz",
@@ -3209,6 +3529,15 @@
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       "license": "MIT"
     },
+    "node_modules/emoji-regex-xs": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/emoji-regex-xs/-/emoji-regex-xs-2.0.1.tgz",
+      "integrity": "sha512-1QFuh8l7LqUcKe24LsPUNzjrzJQ7pgRwp1QMcZ5MX6mFplk2zQ08NVCM84++1cveaUUYtcCYHmeFEuNg16sU4g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/entities": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/entities/-/entities-6.0.1.tgz",
@@ -3278,6 +3607,12 @@
         "@esbuild/win32-x64": "0.27.7"
       }
     },
+    "node_modules/escape-html": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/escape-html/-/escape-html-1.0.3.tgz",
+      "integrity": "sha512-NiSupZ4OeuGwr68lGIeym/ksIZMJodUGOSCZ/FSnTxcrekbvqrgdUxlJOMpijaKZVjAJrWrGs/6Jy8OMuyj9ow==",
+      "license": "MIT"
+    },
     "node_modules/escape-string-regexp": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-5.0.0.tgz",
@@ -3328,6 +3663,12 @@
         }
       }
     },
+    "node_modules/fflate": {
+      "version": "0.7.5",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.7.5.tgz",
+      "integrity": "sha512-QieYf//cis6ywHNi5qW1+PXPQ4bC+XVJAtS4AXIML8P76GroEiOxm/oQtn1f02UkJY1+KsXMJcC+R2v/Eg4G3g==",
+      "license": "MIT"
+    },
     "node_modules/flattie": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/flattie/-/flattie-1.1.1.tgz",
@@ -3621,6 +3962,18 @@
         "url": "https://opencollective.com/unified"
       }
     },
+    "node_modules/hex-rgb": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/hex-rgb/-/hex-rgb-4.3.0.tgz",
+      "integrity": "sha512-Ox1pJVrDCyGHMG9CFg1tmrRUMRPRsAWYc/PinY0XzJU4K7y7vjNoLKIQ7BR5UJMCxNN8EM1MNDmHWA/B3aZUuw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/html-escaper": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-3.0.3.tgz",
@@ -3810,6 +4163,16 @@
       "integrity": "sha512-8h2oVEZNktL4BH2JCOI90iD1yXwL6iNW7KcCKT2QZgQJR2vbqDsldCTPRU9NifTCqHZci57XvQQ15YTu+sTYPg==",
       "license": "MIT"
     },
+    "node_modules/linebreak": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/linebreak/-/linebreak-1.1.0.tgz",
+      "integrity": "sha512-MHp03UImeVhB7XZtjd0E4n6+3xr5Dq/9xI/5FptGk5FrbDR3zagPa2DS6U8ks/3HjbKWG9Q1M2ufOzxV2qLYSQ==",
+      "license": "MIT",
+      "dependencies": {
+        "base64-js": "0.0.8",
+        "unicode-trie": "^2.0.0"
+      }
+    },
     "node_modules/lodash-es": {
       "version": "4.18.1",
       "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.18.1.tgz",
@@ -4909,6 +5272,22 @@
       "integrity": "sha512-xg1eHpwYL/D/HEdWw2goFZP6vV0FH7W+PZ5rFkGjdIDLtxq7EkzBUeT3m+lndYCt8wKbmofUu1MUdMCXkCk9ZQ==",
       "license": "MIT"
     },
+    "node_modules/pako": {
+      "version": "0.2.9",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-0.2.9.tgz",
+      "integrity": "sha512-NUcwaKxUxWrZLpDG+z/xZaCgQITkA/Dv4V/T6bw7VON6l1Xz/VnrBqrYjZQ12TamKHzITTfOEIYUj48y2KXImA==",
+      "license": "MIT"
+    },
+    "node_modules/parse-css-color": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/parse-css-color/-/parse-css-color-0.2.1.tgz",
+      "integrity": "sha512-bwS/GGIFV3b6KS4uwpzCFj4w297Yl3uqnSgIPsoQkx7GMLROXfMnWvxfNkL0oh8HVhZA4hvJoEoEIqonfJ3BWg==",
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "^1.1.4",
+        "hex-rgb": "^4.1.0"
+      }
+    },
     "node_modules/parse-latin": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/parse-latin/-/parse-latin-7.0.0.tgz",
@@ -5013,6 +5392,12 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/postcss-value-parser": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz",
+      "integrity": "sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==",
+      "license": "MIT"
+    },
     "node_modules/prismjs": {
       "version": "1.30.0",
       "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.30.0.tgz",
@@ -5400,6 +5785,28 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
       "license": "MIT"
     },
+    "node_modules/satori": {
+      "version": "0.28.2",
+      "resolved": "https://registry.npmjs.org/satori/-/satori-0.28.2.tgz",
+      "integrity": "sha512-AZBuptlBvlMf+EC/WI6Ss5MJwSEstrC6Pf1o5b2keg6h1QbvjStmrnJXUDGWOrfC1KSU0FApyGhF2xnBwmJRgA==",
+      "license": "MPL-2.0",
+      "dependencies": {
+        "@shuding/opentype.js": "1.4.0-beta.0",
+        "css-background-parser": "^0.1.0",
+        "css-box-shadow": "1.0.0-3",
+        "css-gradient-parser": "^0.0.17",
+        "css-to-react-native": "^3.0.0",
+        "emoji-regex-xs": "^2.0.1",
+        "escape-html": "^1.0.3",
+        "linebreak": "^1.1.0",
+        "parse-css-color": "^0.2.1",
+        "postcss-value-parser": "^4.2.0",
+        "yoga-layout": "^3.2.1"
+      },
+      "engines": {
+        "node": ">=16"
+      }
+    },
     "node_modules/sax": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/sax/-/sax-1.6.0.tgz",
@@ -5536,6 +5943,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/string.prototype.codepointat": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/string.prototype.codepointat/-/string.prototype.codepointat-0.2.1.tgz",
+      "integrity": "sha512-2cBVCj6I4IOvEnjgO/hWqXjqBGsY+zwPmHl12Srk9IXSZ56Jwwmy+66XO5Iut/oQVR7t5ihYdLB0GMa4alEUcg==",
+      "license": "MIT"
+    },
     "node_modules/stringify-entities": {
       "version": "4.0.4",
       "resolved": "https://registry.npmjs.org/stringify-entities/-/stringify-entities-4.0.4.tgz",
@@ -5737,6 +6150,16 @@
       "integrity": "sha512-Ql87qFHB3s/De2ClA9e0gsnS6zXG27SkTiSJwjCc9MebbfapQfuPzumMIUMi38ezPZVNFcHI9sUIepeQfw8J8Q==",
       "license": "MIT"
     },
+    "node_modules/unicode-trie": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/unicode-trie/-/unicode-trie-2.0.0.tgz",
+      "integrity": "sha512-x7bc76x0bm4prf1VLg79uhAzKw8DVboClSN5VxJuQ+LKDOVEW9CdH+VY7SP+vX7xCYQqzzgQpFqz15zeLvAtZQ==",
+      "license": "MIT",
+      "dependencies": {
+        "pako": "^0.2.5",
+        "tiny-inflate": "^1.0.0"
+      }
+    },
     "node_modules/unified": {
       "version": "11.0.5",
       "resolved": "https://registry.npmjs.org/unified/-/unified-11.0.5.tgz",
@@ -6696,6 +7119,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/yoga-layout": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/yoga-layout/-/yoga-layout-3.2.1.tgz",
+      "integrity": "sha512-0LPOt3AxKqMdFBZA3HBAt/t/8vIKq7VaQYbuA8WxCgung+p9TVyKRYdpvCb80HcdTN2NkbIKbhNwKUfm3tQywQ==",
+      "license": "MIT"
+    },
     "node_modules/zod": {
       "version": "3.25.76",
       "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
diff --git a/package.json b/package.json
index 685bdf2..1e49a1e 100644
--- a/package.json
+++ b/package.json
@@ -9,12 +9,15 @@
     "preview": "astro preview"
   },
   "dependencies": {
+    "@fontsource/jetbrains-mono": "^5.3.0",
+    "@resvg/resvg-js": "^2.6.2",
     "astro": "^5.0.0",
     "github-slugger": "^2.0.0",
     "katex": "^0.16.10",
     "mermaid": "^11.0.0",
     "rehype-katex": "^7.0.0",
     "remark-math": "^6.0.0",
+    "satori": "^0.28.2",
     "unist-util-visit": "^5.0.0"
   },
   "allowScripts": {
diff --git a/src/layouts/Base.astro b/src/layouts/Base.astro
index 5117377..6d114c7 100644
--- a/src/layouts/Base.astro
+++ b/src/layouts/Base.astro
@@ -2,6 +2,7 @@
 import 'katex/dist/katex.min.css';
 import { getCollection } from 'astro:content';
 import { buildNavTree } from '../lib/nav.mjs';
+import { COMMIT, BUILT_AT } from '../lib/build-info.mjs';
 import NavTree from '../components/NavTree.astro';
 import Toc from '../components/Toc.astro';
 
@@ -9,11 +10,18 @@ interface Props {
   title: string;
   description?: string;
   headings?: { depth: number; slug: string; text: string }[];
+  // which /og/<slug>.png card this page advertises; synthetic listing
+  // pages fall back to the site card
+  ogSlug?: string;
 }
-const { title, description, headings = [] } = Astro.props;
+const { title, description, headings = [], ogSlug = 'index' } = Astro.props;
 const isHome = Astro.url.pathname === '/';
-const navTree = buildNavTree(await getCollection('garden'));
+const entries = await getCollection('garden');
+const navTree = buildNavTree(entries);
+const noteCount = entries.length;
 const showToc = headings.filter((h) => h.depth <= 3).length >= 2;
+const ogImage = new URL(`/og/${ogSlug}.png`, Astro.site);
+const pageUrl = new URL(Astro.url.pathname, Astro.site);
 ---
 
 <!doctype html>
@@ -24,6 +32,14 @@ const showToc = headings.filter((h) => h.depth <= 3).length >= 2;
     <title>{title}{isHome ? '' : ' // Wesley Ray'}</title>
     <meta name="theme-color" content="#0b0d12" />
     {description && <meta name="description" content={description} />}
+    <meta property="og:title" content={title} />
+    <meta property="og:type" content={isHome ? 'website' : 'article'} />
+    <meta property="og:url" content={pageUrl} />
+    {description && <meta property="og:description" content={description} />}
+    <meta property="og:image" content={ogImage} />
+    <meta property="og:image:width" content="1200" />
+    <meta property="og:image:height" content="630" />
+    <meta name="twitter:card" content="summary_large_image" />
     <link
       rel="preload"
       href="/fonts/jetbrains-mono-v13-latin-regular.woff2"
@@ -61,6 +77,14 @@ const showToc = headings.filter((h) => h.depth <= 3).length >= 2;
             <span id="hq-text"></span>
             <span id="hq-attr" class="hq-attr"></span>
           </div>
+          {
+            isHome && (
+              <div id="live-stats" class="live-stats" hidden>
+                <span class="live-dot" aria-hidden="true" />
+                <span id="live-spotify" />
+              </div>
+            )
+          }
         </header>
         <main>
           <slot />
@@ -85,6 +109,19 @@ const showToc = headings.filter((h) => h.depth <= 3).length >= 2;
               ticking at the lifetime average
             </p>
           </div>
+          {
+            COMMIT && (
+              <p class="build-stamp">
+                built {BUILT_AT} ET ·{' '}
+                <a
+                  href={`https://git.c0smere.net/wes/garden-astro/commit/${COMMIT.replace('+', '')}`}
+                >
+                  {COMMIT}
+                </a>{' '}
+                · {noteCount} notes
+              </p>
+            )
+          }
         </footer>
       </div>
       <aside class="sidebar">
@@ -119,6 +156,39 @@ const showToc = headings.filter((h) => h.depth <= 3).length >= 2;
       }
     </script>
 
+    <script>
+      // Homepage live strip: weekly listening aggregates from the API.
+      // Fail-closed: any error (or non-home page) leaves the slot hidden.
+      const strip = document.getElementById('live-stats');
+      if (strip) {
+        try {
+          const res = await fetch('https://api.c0smere.net/spotify/summary');
+          if (!res.ok) throw new Error(String(res.status));
+          const s = await res.json();
+          const slot = document.getElementById('live-spotify')!;
+          const put = (text: string, strong = false) => {
+            const el = document.createElement(strong ? 'span' : 'span');
+            if (strong) el.className = 'v';
+            el.textContent = text;
+            slot.append(el);
+          };
+          put(String(s.week_minutes), true);
+          put(' min of listening this week');
+          if (s.top_artist_month) {
+            put(' · lately: ');
+            put(s.top_artist_month, true);
+          }
+          if (s.top_genre_month) {
+            put(' · ');
+            put(s.top_genre_month, true);
+          }
+          strip.hidden = false;
+        } catch {
+          /* API down or blocked: strip stays hidden */
+        }
+      }
+    </script>
+
     <script>
       // Odometer: fetch totals once, then animate forward at the lifetime
       // average rate. Looks live, but deliberately never exposes current
@@ -390,6 +460,38 @@ const showToc = headings.filter((h) => h.depth <= 3).length >= 2;
         margin-left: 0.4rem;
         font-size: 0.75rem;
       }
+      .live-stats {
+        display: flex;
+        align-items: baseline;
+        gap: 0.55rem;
+        margin: -0.75rem 0 1.75rem;
+        padding-bottom: 0.85rem;
+        border-bottom: 1px solid var(--hair);
+        font-size: 0.78rem;
+        color: var(--muted);
+      }
+      .live-stats .v {
+        color: var(--fg);
+      }
+      .live-dot {
+        flex: none;
+        width: 7px;
+        height: 7px;
+        border-radius: 50%;
+        background: var(--link);
+        align-self: center;
+        animation: live-pulse 2.4s ease-in-out infinite;
+      }
+      @keyframes live-pulse {
+        50% {
+          opacity: 0.35;
+        }
+      }
+      @media (prefers-reduced-motion: reduce) {
+        .live-dot {
+          animation: none;
+        }
+      }
 
       /* ---- headings ---- */
       h1, h2, h3, h4, h5, h6 {
@@ -637,6 +739,17 @@ const showToc = headings.filter((h) => h.depth <= 3).length >= 2;
         margin-top: 0.35rem;
         font-size: 0.72rem;
       }
+      .build-stamp {
+        margin-top: 1.25rem;
+        font-size: 0.72rem;
+        color: hsla(0, 0%, 100%, 0.4);
+      }
+      .build-stamp a {
+        color: inherit;
+      }
+      .build-stamp a:hover {
+        color: var(--link-bright);
+      }
 
       /* ---- homepage: typographic feed, like the blog's index ---- */
       .home main h1 {
diff --git a/src/lib/build-info.mjs b/src/lib/build-info.mjs
new file mode 100644
index 0000000..e9c8faf
--- /dev/null
+++ b/src/lib/build-info.mjs
@@ -0,0 +1,35 @@
+// Build provenance for the footer stamp. Evaluated once per build (module
+// scope). The containerized build has no git binary, so deploy/build.sh
+// passes GARDEN_COMMIT in; local builds fall back to asking git directly.
+// A trailing "+" marks a build from a dirty tree.
+import { execSync } from 'node:child_process';
+
+function detectCommit() {
+  if (process.env.GARDEN_COMMIT) return process.env.GARDEN_COMMIT;
+  try {
+    const h = execSync('git rev-parse --short HEAD', {
+      stdio: ['ignore', 'pipe', 'ignore'],
+    })
+      .toString()
+      .trim();
+    let dirty = '';
+    try {
+      execSync('git diff --quiet', { stdio: 'ignore' });
+    } catch {
+      dirty = '+';
+    }
+    return h + dirty;
+  } catch {
+    return '';
+  }
+}
+
+export const COMMIT = detectCommit();
+
+const fmt = new Intl.DateTimeFormat('en-CA', {
+  dateStyle: 'short',
+  timeStyle: 'short',
+  hour12: false,
+  timeZone: 'America/New_York',
+});
+export const BUILT_AT = fmt.format(new Date()).replace(', ', ' ');
diff --git a/src/pages/[...slug].astro b/src/pages/[...slug].astro
index 17080c2..5eb8f0a 100644
--- a/src/pages/[...slug].astro
+++ b/src/pages/[...slug].astro
@@ -72,6 +72,7 @@ const contentLeadsWithTitle =
   title={title}
   description={entry?.data.description}
   headings={rendered?.headings ?? []}
+  ogSlug={entry ? slugForId(entry.id) : undefined}
 >
   {!contentLeadsWithTitle && <h1>{title}</h1>}
   {Content && <Content />}
diff --git a/src/pages/og/[...slug].png.ts b/src/pages/og/[...slug].png.ts
new file mode 100644
index 0000000..d970cdd
--- /dev/null
+++ b/src/pages/og/[...slug].png.ts
@@ -0,0 +1,128 @@
+// Build-time OG images: 1200x630 dark cards matching the site design,
+// one per note (plus /og/index.png for the homepage). satori renders an
+// element tree to SVG, resvg rasterizes to PNG. Base.astro points
+// og:image here via the ogSlug prop.
+import fs from 'node:fs';
+import type { APIRoute } from 'astro';
+import { getCollection } from 'astro:content';
+import satori from 'satori';
+import { Resvg } from '@resvg/resvg-js';
+import { slugForId } from '../../lib/quartz-compat.mjs';
+
+const FONT_DIR = 'node_modules/@fontsource/jetbrains-mono/files';
+const mono400 = fs.readFileSync(`${FONT_DIR}/jetbrains-mono-latin-400-normal.woff`);
+const mono800 = fs.readFileSync(`${FONT_DIR}/jetbrains-mono-latin-800-normal.woff`);
+
+export async function getStaticPaths() {
+  const entries = await getCollection('garden', (e: any) => !e.data.draft);
+  return entries.map((e: any) => {
+    const isIndex = e.id === 'index';
+    const title = isIndex
+      ? 'Wesley Ray'
+      : (e.data.title ?? e.id.split('/').pop());
+    const dir = e.id.includes('/') ? e.id.slice(0, e.id.lastIndexOf('/')) : '';
+    return {
+      params: { slug: isIndex ? 'index' : slugForId(e.id) },
+      props: {
+        title,
+        dir,
+        subtitle: isIndex ? 'projects, notes, and experiments' : dir,
+      },
+    };
+  });
+}
+
+export const GET: APIRoute = async ({ props }) => {
+  const { title, subtitle } = props as { title: string; subtitle: string };
+  const size = title.length > 55 ? 44 : title.length > 32 ? 56 : 68;
+
+  const svg = await satori(
+    {
+      type: 'div',
+      props: {
+        style: {
+          width: '100%',
+          height: '100%',
+          display: 'flex',
+          flexDirection: 'column',
+          justifyContent: 'space-between',
+          backgroundColor: '#0b0d12',
+          borderLeft: '14px solid #218107',
+          padding: '64px 72px',
+          fontFamily: 'JetBrains Mono',
+          color: '#ffffff',
+        },
+        children: [
+          {
+            type: 'div',
+            props: {
+              style: {
+                display: 'flex',
+                fontSize: '26px',
+                color: 'rgba(255,255,255,0.64)',
+                letterSpacing: '2px',
+              },
+              children: 'the garden // Wesley Ray',
+            },
+          },
+          {
+            type: 'div',
+            props: {
+              style: {
+                display: 'flex',
+                fontSize: `${size}px`,
+                fontWeight: 800,
+                lineHeight: 1.25,
+                letterSpacing: '-1px',
+              },
+              children: title,
+            },
+          },
+          {
+            type: 'div',
+            props: {
+              style: {
+                display: 'flex',
+                justifyContent: 'space-between',
+                fontSize: '26px',
+              },
+              children: [
+                {
+                  type: 'div',
+                  props: {
+                    style: {
+                      display: 'flex',
+                      color: 'rgba(255,255,255,0.64)',
+                    },
+                    children: subtitle || ' ',
+                  },
+                },
+                {
+                  type: 'div',
+                  props: {
+                    style: { display: 'flex', color: '#2fa50f' },
+                    children: 'garden.c0smere.net',
+                  },
+                },
+              ],
+            },
+          },
+        ],
+      },
+    },
+    {
+      width: 1200,
+      height: 630,
+      fonts: [
+        { name: 'JetBrains Mono', data: mono400, weight: 400, style: 'normal' },
+        { name: 'JetBrains Mono', data: mono800, weight: 800, style: 'normal' },
+      ],
+    },
+  );
+
+  const png = new Resvg(svg, {
+    fitTo: { mode: 'width', value: 1200 },
+  }).render().asPng();
+
+  return new Response(png, { headers: { 'Content-Type': 'image/png' } });
+};