diff --git a/update_products_from_issues.py b/update_products_from_issues.py
new file mode 100644
index 0000000..905a4f2
--- /dev/null
+++ b/update_products_from_issues.py
@@ -0,0 +1,209 @@
+#!/usr/bin/env python3
+
+from __future__ import annotations
+
+import argparse
+import json
+import re
+from dataclasses import dataclass
+from datetime import date
+from pathlib import Path
+from typing import Any
+
+
+ISSUE_TYPES = {"addressed", "known"}
+FILENAME_RE = re.compile(r"^(?P<version>[^_]+)_(?P<date>\d{4}-\d{2}-\d{2})\.[^.]+$")
+HOTFIX_RE = re.compile(r"^(?P<base>\d+(?:\.\d+)*)(?:-h(?P<hotfix>\d+))?$")
+
+
+@dataclass(frozen=True)
+class FileIdentity:
+    product: str
+    issue_type: str
+    version: str
+
+
+@dataclass(frozen=True)
+class FileRecord:
+    identity: FileIdentity
+    filename: str
+    release_date: date
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="Update products.json from issue files, keeping latest date per version."
+    )
+    parser.add_argument(
+        "--issues-dir",
+        default="web/data/issues",
+        help="Directory containing product issue files.",
+    )
+    parser.add_argument(
+        "--products-json",
+        default="web/data/products.json",
+        help="Path to products.json.",
+    )
+    return parser.parse_args()
+
+
+def collect_latest_issue_files(issues_dir: Path) -> dict[FileIdentity, FileRecord]:
+    latest: dict[FileIdentity, FileRecord] = {}
+
+    for file_path in sorted(p for p in issues_dir.rglob("*") if p.is_file()):
+        relative = file_path.relative_to(issues_dir)
+        if len(relative.parts) != 3:
+            continue
+
+        product, issue_type, filename = relative.parts
+        if issue_type not in ISSUE_TYPES:
+            continue
+
+        parsed = parse_issue_filename(filename)
+        if parsed is None:
+            continue
+
+        version, release_date = parsed
+        identity = FileIdentity(product=product, issue_type=issue_type, version=version)
+        record = FileRecord(identity=identity, filename=filename, release_date=release_date)
+
+        current = latest.get(identity)
+        if current is None or (record.release_date, record.filename) > (
+            current.release_date,
+            current.filename,
+        ):
+            latest[identity] = record
+
+    return latest
+
+
+def parse_issue_filename(filename: str) -> tuple[str, date] | None:
+    match = FILENAME_RE.match(filename)
+    if not match:
+        return None
+
+    version = match.group("version")
+    try:
+        release_date = date.fromisoformat(match.group("date"))
+    except ValueError:
+        return None
+
+    return version, release_date
+
+
+def clear_leaf_issue_arrays(node: Any) -> None:
+    if isinstance(node, dict):
+        if "addressed" in node or "known" in node:
+            node["addressed"] = []
+            node["known"] = []
+            return
+
+        for value in node.values():
+            clear_leaf_issue_arrays(value)
+
+
+def is_issue_leaf(node: Any) -> bool:
+    return isinstance(node, dict) and ("addressed" in node or "known" in node)
+
+
+def pick_target_leaf_path(products: dict[str, Any], product: str, version: str) -> list[str] | None:
+    parts = version.split(".")
+    if not parts:
+        return None
+
+    major = parts[0]
+    minor = f"{parts[0]}.{parts[1]}" if len(parts) > 1 else parts[0]
+
+    candidates = [
+        [product, major, minor],
+        [product, major],
+        [product],
+    ]
+
+    for path in candidates:
+        node = get_path(products, path)
+        if is_issue_leaf(node):
+            return path
+
+    return None
+
+
+def get_path(data: Any, path: list[str]) -> Any:
+    current = data
+    for key in path:
+        if not isinstance(current, dict) or key not in current:
+            return None
+        current = current[key]
+    return current
+
+
+def parse_release_prefix(prefix: str) -> tuple[tuple[int, ...], int]:
+    match = HOTFIX_RE.match(prefix)
+    if not match:
+        return tuple(), -1
+
+    base_parts = tuple(int(part) for part in match.group("base").split("."))
+    hotfix_group = match.group("hotfix")
+    hotfix = int(hotfix_group) if hotfix_group is not None else -1
+    return base_parts, hotfix
+
+
+def filename_sort_key(filename: str) -> tuple[tuple[int, ...], int, int, str]:
+    prefix = filename.split("_", 1)[0]
+    base_parts, hotfix = parse_release_prefix(prefix)
+    is_hotfix = 1 if hotfix >= 0 else 0
+    return base_parts, is_hotfix, hotfix, filename
+
+
+def add_file_to_leaf(products: dict[str, Any], path: list[str], issue_type: str, filename: str) -> None:
+    leaf = get_path(products, path)
+    if not isinstance(leaf, dict):
+        return
+
+    files = leaf.get(issue_type)
+    if not isinstance(files, list):
+        files = []
+
+    files.append(filename)
+    leaf[issue_type] = sorted(set(files), key=filename_sort_key)
+
+
+def update_products(issues_dir: Path, products_path: Path) -> None:
+    if not issues_dir.is_dir():
+        raise FileNotFoundError(f"Issues directory not found: {issues_dir}")
+    if not products_path.is_file():
+        raise FileNotFoundError(f"products.json not found: {products_path}")
+
+    with products_path.open("r", encoding="utf-8") as f:
+        products = json.load(f)
+
+    if not isinstance(products, dict):
+        raise ValueError("products.json must contain a top-level object")
+
+    clear_leaf_issue_arrays(products)
+
+    latest_files = collect_latest_issue_files(issues_dir)
+    for record in sorted(latest_files.values(), key=lambda r: (r.identity.product, r.identity.issue_type, r.identity.version)):
+        path = pick_target_leaf_path(products, record.identity.product, record.identity.version)
+        if path is None:
+            continue
+        add_file_to_leaf(products, path, record.identity.issue_type, record.filename)
+
+    with products_path.open("w", encoding="utf-8") as f:
+        json.dump(products, f, indent=2)
+        f.write("\n")
+
+
+def main() -> int:
+    args = parse_args()
+    repo_root = Path(__file__).resolve().parent
+    issues_dir = (repo_root / args.issues_dir).resolve()
+    products_path = (repo_root / args.products_json).resolve()
+
+    update_products(issues_dir=issues_dir, products_path=products_path)
+    print(f"Updated {products_path} from {issues_dir}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/web/data/products.json b/web/data/products.json
index 5582177..d7d6339 100644
--- a/web/data/products.json
+++ b/web/data/products.json
@@ -110,4 +110,4 @@
     "addressed": [],
     "known": []
   }
-}
\ No newline at end of file
+}
diff --git a/web/js/tree.js b/web/js/tree.js
index fafd29d..1efef34 100644
--- a/web/js/tree.js
+++ b/web/js/tree.js
@@ -115,6 +115,11 @@ function createTreeNode(name, value, path) {
             childrenContainer.appendChild(childNode);
         });
 
+        if (shouldStartCollapsed(name, value)) {
+            childrenContainer.classList.add('collapsed');
+            toggle.textContent = '▶';
+        }
+
         toggle.addEventListener('click', event => {
             event.stopPropagation();
             childrenContainer.classList.toggle('collapsed');
@@ -138,6 +143,24 @@ function createTreeNode(name, value, path) {
     return container;
 }
 
+function shouldStartCollapsed(name, value) {
+    if (!value || typeof value !== 'object') {
+        return false;
+    }
+
+    const childKeys = Object.keys(value);
+    if (childKeys.length === 0) {
+        return false;
+    }
+
+    const hotfixChildren = childKeys.filter(key => {
+        const match = key.match(/^(.*)-h\d+$/i);
+        return match && match[1] === name;
+    });
+
+    return hotfixChildren.length > 0;
+}
+
 function createCheckbox(path, value) {
     const checkbox = document.createElement('input');
     checkbox.type = 'checkbox';
diff --git a/web/script.js b/web/script.js
index 9617007..a6d1ace 100644
--- a/web/script.js
+++ b/web/script.js
@@ -56,25 +56,25 @@ function transformNode(node) {
             };
         }
 
-        const grouped = {};
+        const groupedByPrefix = {};
 
         addressed.forEach(fileName => {
             const prefix = getFilePrefix(fileName);
-            if (!grouped[prefix]) {
-                grouped[prefix] = { addressed: [], known: [] };
+            if (!groupedByPrefix[prefix]) {
+                groupedByPrefix[prefix] = { addressed: [], known: [] };
             }
-            grouped[prefix].addressed.push(fileName);
+            groupedByPrefix[prefix].addressed.push(fileName);
         });
 
         known.forEach(fileName => {
             const prefix = getFilePrefix(fileName);
-            if (!grouped[prefix]) {
-                grouped[prefix] = { addressed: [], known: [] };
+            if (!groupedByPrefix[prefix]) {
+                groupedByPrefix[prefix] = { addressed: [], known: [] };
             }
-            grouped[prefix].known.push(fileName);
+            groupedByPrefix[prefix].known.push(fileName);
         });
 
-        return grouped;
+        return groupHotfixPrefixes(groupedByPrefix);
     }
 
     const transformed = {};
@@ -84,6 +84,42 @@ function transformNode(node) {
     return transformed;
 }
 
+function groupHotfixPrefixes(groupedByPrefix) {
+    const byFamily = {};
+
+    Object.keys(groupedByPrefix).forEach(prefix => {
+        const family = getReleaseFamily(prefix);
+        if (!byFamily[family]) {
+            byFamily[family] = [];
+        }
+        byFamily[family].push(prefix);
+    });
+
+    const result = {};
+
+    Object.keys(byFamily).forEach(family => {
+        const members = byFamily[family];
+        const hasHotfixes = members.length > 1 || members.some(member => member !== family);
+
+        if (!hasHotfixes && members[0] === family) {
+            result[family] = groupedByPrefix[family];
+            return;
+        }
+
+        const branch = {};
+        members.forEach(member => {
+            branch[member] = groupedByPrefix[member];
+        });
+        result[family] = branch;
+    });
+
+    return result;
+}
+
+function getReleaseFamily(prefix) {
+    return String(prefix || '').replace(/-h\d+$/i, '');
+}
+
 function getFilePrefix(fileName) {
     const baseName = String(fileName || '');
     const underscoreIndex = baseName.indexOf('_');
diff --git a/web/styles.css b/web/styles.css
index 65d3b76..57e0013 100644
--- a/web/styles.css
+++ b/web/styles.css
@@ -32,7 +32,7 @@ h2 {
 }
 
 .sidebar {
-    flex: 0 0 250px;
+    flex: 0 0 350px;
     background-color: #f8f9fa;
     border: 1px solid #ddd;
     border-radius: 4px;