evaleval · evijit · Mar 30, 2026 · Mar 30, 2026 · Mar 30, 2026 · Mar 30, 2026
diff --git a/.github/workflows/convert-svg-images.yml b/.github/workflows/convert-svg-images.yml
@@ -0,0 +1,76 @@
+name: Convert SVG post images to PNG for social thumbnails
+
+# Runs whenever posts or blog images change. Scans every post's `image:` front
+# matter value; if it points to an SVG, a raster PNG copy is generated at the
+# same path (same name, .png extension) and committed back to the branch.
+# The SVG is left untouched — it continues to be used for page display.
+# head.html then swaps .svg → .png only for the og:image / twitter:image tags.
+
+on:
+  push:
+    paths:
+      - "_posts/**"
+      - "assets/img/blogs/**"
+
+jobs:
+  convert-svg:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install rsvg-convert
+        run: sudo apt-get install -y librsvg2-bin
+
+      - name: Convert SVG post images to PNG
+        id: convert
+        run: |
+          set -euo pipefail
+          converted=0
+          converted_files=""
+
+          # Collect every `image:` value from post front matter
+          while IFS= read -r line; do
+            # Strip the key and surrounding quotes, preserving spaces in path
+            raw="${line#image:}"
+            raw="$(echo "$raw" | sed "s/^[[:space:]]*//;s/[[:space:]]*$//;s/^[\"']//;s/[\"']$//")"
+            raw="${raw#/}"   # strip leading slash to form a relative path
+
+            [[ "$raw" == *.svg ]] || continue
+
+            svg="$raw"
+            png="${svg%.svg}.png"
+
+            if [[ ! -f "$svg" ]]; then
+              echo "⚠️  SVG not found, skipping: $svg"
+              continue
+            fi
+
+            if [[ -f "$png" ]]; then
+              echo "✅ PNG already exists, skipping: $png"
+              continue
+            fi
+
+            echo "🔄 Converting $svg → $png"
+            # 1200×630 is the recommended og:image size for all major platforms
+            rsvg-convert --width 1200 --height 630 --keep-aspect-ratio "$svg" -o "$png"
+            converted_files="$converted_files $png"
+            converted=$((converted + 1))
+          done < <(grep -h "^image:" _posts/*.md 2>/dev/null || true)
+
+          echo "converted=$converted" >> "$GITHUB_OUTPUT"
+          echo "converted_files=$converted_files" >> "$GITHUB_OUTPUT"
+
+      - name: Commit converted PNGs
+        if: steps.convert.outputs.converted != '0'
+        run: |
+          git config user.name  "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          # Stage only the files we actually converted (they may live anywhere)
+          for f in ${{ steps.convert.outputs.converted_files }}; do
+            git add "$f"
+          done
+          git commit -m "chore: add PNG thumbnails converted from SVG post images [skip ci]"
+          git push
diff --git a/Gemfile b/Gemfile
@@ -1,4 +1,6 @@
 source "https://rubygems.org"
 gem "jekyll", "~> 4.3"
 gem "minima", "~> 2.5"
-gem "jekyll-sitemap"
+gem "jekyll-sitemap"
+gem "jekyll-seo-tag"
+gem "jekyll-feed"
diff --git a/_includes/head.html b/_includes/head.html
@@ -1,5 +1,22 @@
 
 <head>
+    {% comment %} Explicit og:image / twitter:image placed before {% seo %} so our tag
+    takes precedence. Uses the post's image when set, falls back to the site-wide banner.
+    SVGs are not supported by social crawlers, so for og:image we swap the .svg extension
+    to .png — a raster copy is auto-generated by .github/workflows/convert-svg-images.yml
+    and committed alongside the original SVG, leaving it intact for page display. {% endcomment %}
+    {% if page.image %}
+      {% assign _page_ext = page.image | split: '.' | last | downcase %}
+      {% if _page_ext == 'svg' %}
+        {% assign _og_img = page.image | replace: '.svg', '.png' | absolute_url %}
+      {% else %}
+        {% assign _og_img = page.image | absolute_url %}
+      {% endif %}
+    {% else %}
+      {% assign _og_img = site.image | absolute_url %}
+    {% endif %}
+    <meta property="og:image" content="{{ _og_img }}">
+    <meta name="twitter:image" content="{{ _og_img }}">
     {% seo %}
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">

diff --git a/_posts/2025-07-13-eval-science-kickoff.md b/_posts/2025-07-13-eval-science-kickoff.md
@@ -4,7 +4,7 @@ title: "The Science of Evaluations: Workstream Kickoff Post"
 date: 2025-07-13
 category: Research
 published: true
-image: assets/img/blogs/eval-sci-kickoff.webp
+image: /assets/img/blogs/eval-sci-kickoff.webp
 authors:
   - name: "Eval Science working group, led by Subho Majumdar"
     url: "https://shubhobm.github.io/"

diff --git a/_posts/2025-08-10-blog-chart-crisis.md b/_posts/2025-08-10-blog-chart-crisis.md
@@ -4,7 +4,7 @@ title: "The AI Evaluation Chart Crisis"
 date: 2025-08-09
 published: true
 category: Documentation
-image: "assets/img/blogs/2-data-chart.webp"
+image: "/assets/img/blogs/2-data-chart.webp"
 authors:
   - name: "Andrew Tran"
   - name: "Leshem Choshen"

diff --git a/_posts/2025-11-12-hidden-cost-of-evals.md b/_posts/2025-11-12-hidden-cost-of-evals.md
@@ -4,7 +4,7 @@ title: "The Hidden Social Costs of AI"
 date: 2025-11-12
 published: true
 category: Research 
-image: assets/img/blogs/simp_eval_timeline.png
+image: /assets/img/blogs/simp_eval_timeline.png
 authors:
   - name: "Abdul Hameed"
   - name: "Afifah Kashif"

diff --git a/assets/img/blogs/field-notes-interview.png b/assets/img/blogs/field-notes-interview.png