diff --git a/scripts/dossiers-ngi/README.md b/scripts/dossiers-ngi/README.md
index 718e1ca..064b830 100644
--- a/scripts/dossiers-ngi/README.md
+++ b/scripts/dossiers-ngi/README.md
@@ -58,6 +58,7 @@ Per branch in JSON / sticky bar:
 | `tip_time` | committer time of tip (`%cI`) |
 | `built_at` | when this edition freeze was written |
 | `build_seconds` | wall time of that freeze |
+| `vs_main_plus` / `vs_main_minus` | `git diff --numstat` tip vs `main` tip (sticky bar +grün/−rot; omitted on `main`) |
 
 Rebuild runs **only when** `.edition-tip` ≠ current tip (timer never forces).
 Each run also: `git fetch --prune`, `worktree prune`, drop stale
diff --git a/scripts/dossiers-ngi/branch-status-hourly.py b/scripts/dossiers-ngi/branch-status-hourly.py
index 16b0a3f..9bed2c3 100755
--- a/scripts/dossiers-ngi/branch-status-hourly.py
+++ b/scripts/dossiers-ngi/branch-status-hourly.py
@@ -234,6 +234,30 @@ def tip_recorded(editions: Path, slug: str) -> str:
     return p.read_text(encoding="utf-8").strip()
 
 
+
+def diff_vs_main(repo: Path, main_tip: str, tip: str) -> tuple[int, int]:
+    """Insertions/deletions of tip vs main tip (git diff --numstat)."""
+    if not main_tip or not tip or main_tip == tip:
+        return 0, 0
+    cp = git(repo, "diff", "--numstat", main_tip, tip, check=False)
+    if cp.returncode != 0:
+        return 0, 0
+    plus = minus = 0
+    for line in (cp.stdout or "").splitlines():
+        parts = line.split("	")
+        if len(parts) < 3:
+            continue
+        a, d = parts[0], parts[1]
+        if a == "-" or d == "-":
+            continue
+        try:
+            plus += int(a)
+            minus += int(d)
+        except ValueError:
+            continue
+    return plus, minus
+
+
 def tip_commit_time(repo: Path, tip: str) -> str:
     """Committer ISO time of tip (empty on failure)."""
     cp = git(repo, "log", "-1", "--format=%cI", tip, check=False)
@@ -531,6 +555,10 @@ def build_payload(repo: Path, tips: dict[str, str], rebuild: bool) -> dict:
             sync_flask_alias(ed_root, tips)
 
     tip_times = {name: tip_commit_time(repo, tip) for name, tip in tips.items()}
+    main_tip = tips.get("main", "")
+    vs_main = {
+        name: diff_vs_main(repo, main_tip, tip) for name, tip in tips.items()
+    }
     branches_out = []
     for row in rows:
         name = row["branch"]
@@ -556,6 +584,11 @@ def build_payload(repo: Path, tips: dict[str, str], rebuild: bool) -> dict:
             entry["built_at"] = meta["built_at"]
         if "build_seconds" in meta:
             entry["build_seconds"] = meta["build_seconds"]
+        # sticky bar: +grün / −rot vs main (omit on main itself)
+        if name != "main" and main_tip:
+            plus, minus = vs_main.get(name, (0, 0))
+            entry["vs_main_plus"] = plus
+            entry["vs_main_minus"] = minus
         branches_out.append(entry)
 
     payload = {
diff --git a/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.css b/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.css
index df4d2d9..ae291e2 100644
--- a/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.css
+++ b/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.css
@@ -76,3 +76,12 @@ a.cascade-tree-row.is-active:hover {
     font-size: 10px;
   }
 }
+
+.cascade-bar .diff-plus {
+  color: #3fb950;
+  font-weight: 600;
+}
+.cascade-bar .diff-minus {
+  color: #f85149;
+  font-weight: 600;
+}
diff --git a/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.js b/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.js
index 9ad8924..a4f4ea4 100644
--- a/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.js
+++ b/sites/dossiers.ngi.hacktivism.ch/_cascade/bar.js
@@ -37,23 +37,49 @@
     return Math.round(n) + "s";
   }
 
-  function metaBits(row) {
+  function metaHtml(row) {
     var tip = row.tip || "";
     var tipTime = row.tip_time || "";
     var builtAt = row.built_at || "";
     var buildSec = row.build_seconds;
-    var bits = [];
-    if (tip) bits.push("@" + tip);
-    if (tipTime) bits.push("tip " + shortTime(tipTime));
+    var parts = [];
+    if (tip) parts.push(esc("@" + tip));
+    if (tipTime) parts.push(esc("tip " + shortTime(tipTime)));
     if (buildSec != null && buildSec !== "")
-      bits.push("build " + fmtBuildSec(buildSec));
-    if (builtAt) bits.push("at " + shortTime(builtAt));
-    return bits;
+      parts.push(esc("build " + fmtBuildSec(buildSec)));
+    if (builtAt) parts.push(esc("at " + shortTime(builtAt)));
+    // vs main: +grün / −rot (omit on main / when both zero absent)
+    var plus = row.vs_main_plus;
+    var minus = row.vs_main_minus;
+    if (plus != null || minus != null) {
+      var p = plus == null ? 0 : Number(plus);
+      var m = minus == null ? 0 : Number(minus);
+      if (isFinite(p) && isFinite(m) && (p > 0 || m > 0 || row.branch !== "main")) {
+        parts.push(
+          '<span class="diff-plus">+' +
+            esc(String(p)) +
+            '</span> <span class="diff-minus">−' +
+            esc(String(m)) +
+            "</span>"
+        );
+      }
+    }
+    return parts.join(" · ");
   }
 
   function rowTitle(row, buildSec) {
     var tip = row.tip || "";
     var tipTime = row.tip_time || "";
+    var plus = row.vs_main_plus;
+    var minus = row.vs_main_minus;
+    var vs = "";
+    if (plus != null || minus != null) {
+      vs =
+        " vs main +" +
+        String(plus == null ? 0 : plus) +
+        "/−" +
+        String(minus == null ? 0 : minus);
+    }
     return (
       "Switch build to " +
       (row.branch || "") +
@@ -61,7 +87,8 @@
       (tipTime ? " tip=" + tipTime : "") +
       (buildSec != null && buildSec !== ""
         ? " build=" + fmtBuildSec(buildSec)
-        : "")
+        : "") +
+      vs
     );
   }
 
@@ -125,15 +152,15 @@
       var a = rows[i];
       if (a.getAttribute("data-edition") !== (row.edition || "")) return false;
       if (a.getAttribute("data-branch") !== (row.branch || "")) return false;
-      var bits = metaBits(row);
+      var tipHtml = metaHtml(row);
       var tipEl = a.querySelector(".tip");
-      var wantTip = bits.length ? " " + bits.join(" · ") : "";
+      var wantTip = tipHtml ? " " + tipHtml : "";
       if (tipEl) {
-        if (tipEl.textContent !== wantTip) tipEl.textContent = wantTip;
+        if (tipEl.innerHTML !== wantTip) tipEl.innerHTML = wantTip;
       } else if (wantTip) {
         tipEl = document.createElement("span");
         tipEl.className = "tip";
-        tipEl.textContent = wantTip;
+        tipEl.innerHTML = wantTip;
         a.appendChild(tipEl);
       }
       var defEl = a.querySelector(".cascade-default");
@@ -189,15 +216,13 @@
       var tipTime = row.tip_time || "";
       var buildSec = row.build_seconds;
       var isDefault = branch === defaultBranch;
-      var bits = metaBits(row);
+      var tipHtml = metaHtml(row);
       var label =
         esc(prefix) +
         "<code>" +
         esc(branch) +
         "</code>" +
-        (bits.length
-          ? '<span class="tip"> ' + esc(bits.join(" · ")) + "</span>"
-          : "") +
+        (tipHtml ? '<span class="tip"> ' + tipHtml + "</span>" : "") +
         (isDefault ? '<span class="cascade-default"> · default</span>' : "");
       html.push(
         '<a class="cascade-tree-row" role="treeitem" href="/_cascade/use/' +
diff --git a/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.css b/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.css
index df4d2d9..ae291e2 100644
--- a/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.css
+++ b/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.css
@@ -76,3 +76,12 @@ a.cascade-tree-row.is-active:hover {
     font-size: 10px;
   }
 }
+
+.cascade-bar .diff-plus {
+  color: #3fb950;
+  font-weight: 600;
+}
+.cascade-bar .diff-minus {
+  color: #f85149;
+  font-weight: 600;
+}
diff --git a/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.js b/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.js
index 9ad8924..a4f4ea4 100644
--- a/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.js
+++ b/sites/dossiers.ngi.hacktivism.ch/cascade/_cascade/bar.js
@@ -37,23 +37,49 @@
     return Math.round(n) + "s";
   }
 
-  function metaBits(row) {
+  function metaHtml(row) {
     var tip = row.tip || "";
     var tipTime = row.tip_time || "";
     var builtAt = row.built_at || "";
     var buildSec = row.build_seconds;
-    var bits = [];
-    if (tip) bits.push("@" + tip);
-    if (tipTime) bits.push("tip " + shortTime(tipTime));
+    var parts = [];
+    if (tip) parts.push(esc("@" + tip));
+    if (tipTime) parts.push(esc("tip " + shortTime(tipTime)));
     if (buildSec != null && buildSec !== "")
-      bits.push("build " + fmtBuildSec(buildSec));
-    if (builtAt) bits.push("at " + shortTime(builtAt));
-    return bits;
+      parts.push(esc("build " + fmtBuildSec(buildSec)));
+    if (builtAt) parts.push(esc("at " + shortTime(builtAt)));
+    // vs main: +grün / −rot (omit on main / when both zero absent)
+    var plus = row.vs_main_plus;
+    var minus = row.vs_main_minus;
+    if (plus != null || minus != null) {
+      var p = plus == null ? 0 : Number(plus);
+      var m = minus == null ? 0 : Number(minus);
+      if (isFinite(p) && isFinite(m) && (p > 0 || m > 0 || row.branch !== "main")) {
+        parts.push(
+          '<span class="diff-plus">+' +
+            esc(String(p)) +
+            '</span> <span class="diff-minus">−' +
+            esc(String(m)) +
+            "</span>"
+        );
+      }
+    }
+    return parts.join(" · ");
   }
 
   function rowTitle(row, buildSec) {
     var tip = row.tip || "";
     var tipTime = row.tip_time || "";
+    var plus = row.vs_main_plus;
+    var minus = row.vs_main_minus;
+    var vs = "";
+    if (plus != null || minus != null) {
+      vs =
+        " vs main +" +
+        String(plus == null ? 0 : plus) +
+        "/−" +
+        String(minus == null ? 0 : minus);
+    }
     return (
       "Switch build to " +
       (row.branch || "") +
@@ -61,7 +87,8 @@
       (tipTime ? " tip=" + tipTime : "") +
       (buildSec != null && buildSec !== ""
         ? " build=" + fmtBuildSec(buildSec)
-        : "")
+        : "") +
+      vs
     );
   }
 
@@ -125,15 +152,15 @@
       var a = rows[i];
       if (a.getAttribute("data-edition") !== (row.edition || "")) return false;
       if (a.getAttribute("data-branch") !== (row.branch || "")) return false;
-      var bits = metaBits(row);
+      var tipHtml = metaHtml(row);
       var tipEl = a.querySelector(".tip");
-      var wantTip = bits.length ? " " + bits.join(" · ") : "";
+      var wantTip = tipHtml ? " " + tipHtml : "";
       if (tipEl) {
-        if (tipEl.textContent !== wantTip) tipEl.textContent = wantTip;
+        if (tipEl.innerHTML !== wantTip) tipEl.innerHTML = wantTip;
       } else if (wantTip) {
         tipEl = document.createElement("span");
         tipEl.className = "tip";
-        tipEl.textContent = wantTip;
+        tipEl.innerHTML = wantTip;
         a.appendChild(tipEl);
       }
       var defEl = a.querySelector(".cascade-default");
@@ -189,15 +216,13 @@
       var tipTime = row.tip_time || "";
       var buildSec = row.build_seconds;
       var isDefault = branch === defaultBranch;
-      var bits = metaBits(row);
+      var tipHtml = metaHtml(row);
       var label =
         esc(prefix) +
         "<code>" +
         esc(branch) +
         "</code>" +
-        (bits.length
-          ? '<span class="tip"> ' + esc(bits.join(" · ")) + "</span>"
-          : "") +
+        (tipHtml ? '<span class="tip"> ' + tipHtml + "</span>" : "") +
         (isDefault ? '<span class="cascade-default"> · default</span>' : "");
       html.push(
         '<a class="cascade-tree-row" role="treeitem" href="/_cascade/use/' +