@@ -34,6 +34,15 @@ jobs:
           mkdir -p docs/assets
           cp -r assets/* docs/assets/ 2>/dev/null || true
 
+      # The footer date is the date of the deployed commit, stamped at deploy
+      # time. It is never computed in the browser, so it cannot claim the
+      # catalog is fresher than it is.
+      - name: Stamp footer with deployed commit date
+        run: |
+          updated="$(git log -1 --format=%cs)"
+          sed -i "s|<span id=\"buildDate\"></span>|<span id=\"buildDate\">Updated ${updated}</span>|" docs/index.html
+          grep -q "Updated ${updated}" docs/index.html
+
       - uses: actions/configure-pages@v6
 
       - uses: actions/upload-pages-artifact@v5
 
@@ -0,0 +1,4 @@
+User-agent: *
+Allow: /
+
+Sitemap: https://tmhsdigital.github.io/Developer-Tools-Directory/sitemap.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  <url><loc>https://tmhsdigital.github.io/Developer-Tools-Directory/</loc></url>
+</urlset>
@@ -5,6 +5,7 @@
     "slug": "cfx-developer-tools",
     "description": "AI-powered Cursor IDE plugin for FiveM and RedM resource development",
     "type": "cursor-plugin",
+    "category": "game-dev",
     "homepage": "https://tmhsdigital.github.io/CFX-Developer-Tools/",
     "skills": 9,
     "rules": 6,
@@ -34,6 +35,7 @@
     "slug": "unity-developer-tools",
     "description": "Cursor IDE plugin for Unity game development with URP, HDRP, and Built-in render pipeline support",
     "type": "cursor-plugin",
+    "category": "game-dev",
     "homepage": "https://tmhsdigital.github.io/Unity-Developer-Tools/",
     "skills": 18,
     "rules": 8,
@@ -61,6 +63,7 @@
     "slug": "docker-developer-tools",
     "description": "Cursor IDE plugin for Docker workflows with container management, Compose, and Dockerfile support",
     "type": "cursor-plugin",
+    "category": "infrastructure",
     "homepage": "https://tmhsdigital.github.io/Docker-Developer-Tools/",
     "skills": 17,
     "rules": 10,
@@ -86,6 +89,7 @@
     "slug": "home-lab-developer-tools",
     "description": "Home lab and Raspberry Pi workflows for Cursor with Docker Compose, monitoring, DNS, networking, and security",
     "type": "cursor-plugin",
+    "category": "infrastructure",
     "homepage": "https://tmhsdigital.github.io/Home-Lab-Developer-Tools/",
     "skills": 22,
     "rules": 11,
@@ -111,6 +115,7 @@
     "slug": "mobile-app-developer-tools",
     "description": "Cursor plugin for mobile app development with React Native, Expo, and Flutter support",
     "type": "cursor-plugin",
+    "category": "mobile",
     "homepage": "https://tmhsdigital.github.io/Mobile-App-Developer-Tools/",
     "skills": 43,
     "rules": 12,
@@ -136,6 +141,7 @@
     "slug": "plaid-developer-tools",
     "description": "Cursor plugin and MCP companion for building on the Plaid API",
     "type": "cursor-plugin",
+    "category": "fintech",
     "homepage": "https://tmhsdigital.github.io/Plaid-Developer-Tools/",
     "skills": 17,
     "rules": 7,
@@ -160,6 +166,7 @@
     "slug": "monday-cursor-plugin",
     "description": "Cursor IDE plugin for Monday.com with boards, items, sprints, docs, dashboards, and GraphQL",
     "type": "cursor-plugin",
+    "category": "productivity",
     "homepage": "https://tmhsdigital.github.io/Monday-Cursor-Plugin/",
     "skills": 21,
     "rules": 8,
@@ -184,6 +191,7 @@
     "slug": "steam-cursor-plugin",
     "description": "Steam and Steamworks integration for Cursor IDE for game developers, modders, and power users",
     "type": "cursor-plugin",
+    "category": "game-dev",
     "homepage": "https://tmhsdigital.github.io/Steam-Cursor-Plugin/",
     "skills": 30,
     "rules": 9,
@@ -208,6 +216,7 @@
     "slug": "steam-mcp",
     "description": "MCP server for Steam and Steamworks APIs with store data, player stats, reviews, achievements, and workshop tools",
     "type": "mcp-server",
+    "category": "game-dev",
     "homepage": "https://www.npmjs.com/package/@tmhs/steam-mcp",
     "skills": 0,
     "rules": 0,
@@ -233,6 +242,7 @@
     "slug": "developer-tools-mcp",
     "description": "MCP server providing agent-callable read and write access to the TMHSDigital developer-tools ecosystem: registry, fleet status, drift checking, and standards management",
     "type": "mcp-server",
+    "category": "developer-tooling",
     "homepage": "https://tmhsdigital.github.io/Developer-Tools-MCP/",
     "skills": 0,
     "rules": 0,
@@ -258,6 +268,7 @@
     "slug": "cfx-mcp",
     "description": "MCP server providing agent-callable tools for CFX/FiveM resource development, server management, and community platform integration.",
     "type": "mcp-server",
+    "category": "game-dev",
     "homepage": "https://tmhsdigital.github.io/cfx-mcp/",
     "skills": 0,
     "rules": 0,
@@ -276,6 +287,7 @@
     "slug": "blender-developer-tools",
     "description": "Cursor and Claude Code skills, rules, snippets, and templates for Blender Python add-on and scripting development",
     "type": "cursor-plugin",
+    "category": "3d-media",
     "homepage": "https://tmhsdigital.github.io/Blender-Developer-Tools/",
     "skills": 18,
     "rules": 9,
@@ -303,6 +315,7 @@
     "slug": "local-ai-mcp",
     "description": "Unified MCP server for managing local model runtimes (Ollama, LM Studio, and more): provider-agnostic discovery, lifecycle, hardware-fit, and delegated inference.",
     "type": "mcp-server",
+    "category": "ai",
     "homepage": "https://tmhsdigital.github.io/local-ai-mcp/",
     "skills": 0,
     "rules": 0,
@@ -328,6 +341,7 @@
     "slug": "screencast-mcp",
     "description": "MCP server for Windows screen recording, frame sampling, and minimal ffmpeg edits (capture, watch, trim/concat/convert).",
     "type": "mcp-server",
+    "category": "3d-media",
     "homepage": "https://tmhsdigital.github.io/screencast-mcp/",
     "skills": 0,
     "rules": 0,
@@ -353,6 +367,7 @@
     "slug": "tailscale-mcp",
     "description": "MCP server for safe programmatic access to the local Tailscale daemon: tailnet discovery, SSH config generation, port sharing via Serve/Funnel, and latency matrices.",
     "type": "mcp-server",
+    "category": "infrastructure",
     "homepage": "https://tmhsdigital.github.io/tailscale-mcp/",
     "skills": 0,
     "rules": 0,
@@ -378,6 +393,7 @@
     "slug": "godot-correctness-mcp",
     "description": "Offline static correctness for Godot 4.x GDScript projects: anti-pattern linting via tree-sitter, cross-version API lookup and diff (4.4/4.5), and scene/resource/registry validation. Headless, offline, CI-first.",
     "type": "mcp-server",
+    "category": "game-dev",
     "homepage": "https://tmhsdigital.github.io/godot-correctness-mcp/",
     "skills": 0,
     "rules": 0,
@@ -403,6 +419,7 @@
     "slug": "bounty-radar-mcp",
     "description": "Paid MCP server exposing a GitHub bounty radar tool. One tool, github_bounty_radar, priced at $0.05 USDC on Base and settled over x402 via the CDP facilitator.",
     "type": "mcp-server",
+    "category": "developer-tooling",
     "homepage": "https://tmhsdigital.github.io/bounty-radar-mcp/",
     "skills": 0,
     "rules": 0,
 
@@ -28,12 +28,18 @@
 from __future__ import annotations
 
 import argparse
+import html
 import json
 import re
 import sys
 from pathlib import Path
 from typing import Any
 
+try:  # imported as scripts.sync_from_registry (tests, scaffold)
+    from scripts.validate_registry import CATEGORIES
+except ImportError:  # run directly as scripts/sync_from_registry.py
+    from validate_registry import CATEGORIES
+
 REPO_ROOT = Path(__file__).resolve().parent.parent
 REGISTRY_PATH = REPO_ROOT / "registry.json"
 README_PATH = REPO_ROOT / "README.md"
@@ -225,6 +231,116 @@ def render_embedded_registry(entries: list[dict[str, Any]]) -> str:
     return script_safe_json(entries)
 
 
+STATUS_ORDER = ("active", "beta", "experimental", "maintenance", "deprecated", "archived")
+
+
+def render_filters(entries: list[dict[str, Any]]) -> str:
+    """Filter chips: type chips, then one chip per category in use (in
+    CATEGORIES order), then a status select. Generated so a new category or
+    tool can never be left without a filter (DTD#115)."""
+    esc = html.escape
+    used = {e.get("category") for e in entries}
+    chips = [
+        ("all", "All"),
+        ("cursor-plugin", "Plugins"),
+        ("mcp-server", "MCP Servers"),
+    ] + [(slug, label) for slug, label in CATEGORIES.items() if slug in used]
+    lines = []
+    for value, label in chips:
+        active = value == "all"
+        lines.append(
+            f'    <button type="button" class="filter-btn{" active" if active else ""}" '
+            f'data-filter="{esc(value)}" aria-pressed="{"true" if active else "false"}">'
+            f"{esc(label)}</button>"
+        )
+    statuses = [s for s in STATUS_ORDER if any(e.get("status") == s for e in entries)]
+    lines.append('    <label class="sr-only" for="statusFilter">Filter by status</label>')
+    lines.append('    <select id="statusFilter" class="status-filter">')
+    lines.append('      <option value="all">Any status</option>')
+    for s in statuses:
+        lines.append(f'      <option value="{esc(s)}">{esc(s.capitalize())}</option>')
+    lines.append("    </select>")
+    return "\n".join(lines) + "\n"
+
+
+def render_static_cards(entries: list[dict[str, Any]]) -> str:
+    """Server-rendered tool cards so crawlers, link unfurlers, and visitors
+    without JavaScript see the full catalog. The page script rebuilds the
+    grid from the same registry data and layers filtering on top."""
+    esc = html.escape
+    out = []
+    for e in entries:
+        status = e.get("status", "active")
+        is_mcp = e["type"] == "mcp-server"
+        attrs = (
+            f'data-type="{esc(e["type"])}" data-category="{esc(e.get("category", ""))}" '
+            f'data-status="{esc(status)}" data-slug="{esc(e["slug"])}"'
+        )
+        parts = [f'      <div class="tool-card" {attrs}>']
+        badges = [
+            f'<span class="card-badge {"badge-mcp" if is_mcp else "badge-plugin"}">'
+            f'{"MCP Server" if is_mcp else "Plugin"}</span>'
+        ]
+        if status != "active":
+            badges.append(
+                f'<span class="card-badge badge-status badge-status-{esc(status)}">{esc(status)}</span>'
+            )
+        parts.append(
+            f'        <div class="card-header"><span class="card-title">{esc(e["name"])}</span>'
+            f'<div class="card-badges">{"".join(badges)}</div></div>'
+        )
+        parts.append(f'        <p class="card-description">{esc(e.get("description", ""))}</p>')
+        stats = []
+        for field, label in (("skills", "skills"), ("rules", "rules"), ("mcpTools", "MCP tools")):
+            if int(e.get(field) or 0) > 0:
+                stats.append(
+                    f'<span class="card-stat"><strong>{int(e[field])}</strong> {label}</span>'
+                )
+        for key, value in (e.get("extras") or {}).items():
+            if isinstance(value, int) and value > 0:
+                stats.append(
+                    f'<span class="card-stat"><strong>{value:,}</strong> {esc(key)}</span>'
+                )
+        parts.append(f'        <div class="card-stats">{"".join(stats)}</div>')
+        topics = "".join(
+            f'<span class="topic-tag">{esc(t)}</span>' for t in (e.get("topics") or [])[:5]
+        )
+        parts.append(f'        <div class="card-topics">{topics}</div>')
+        links = [
+            f'<a class="card-link" href="https://github.com/{esc(e["repo"])}" '
+            f'target="_blank" rel="noopener">Repository</a>'
+        ]
+        if e.get("homepage"):
+            links.append(
+                f'<a class="card-link" href="{esc(e["homepage"])}" target="_blank" rel="noopener">Docs</a>'
+            )
+        if e.get("npm"):
+            links.append(
+                f'<a class="card-link" href="https://www.npmjs.com/package/{esc(e["npm"])}" '
+                f'target="_blank" rel="noopener">npm</a>'
+            )
+        parts.append(f'        <div class="card-links">{"".join(links)}</div>')
+        parts.append("      </div>")
+        out.append("\n".join(parts))
+    return "\n".join(out) + "\n"
+
+
+SITEMAP_URL = "https://tmhsdigital.github.io/Developer-Tools-Directory/"
+
+
+def render_sitemap() -> str:
+    return (
+        '<?xml version="1.0" encoding="UTF-8"?>\n'
+        '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n'
+        f"  <url><loc>{SITEMAP_URL}</loc></url>\n"
+        "</urlset>\n"
+    )
+
+
+def render_robots() -> str:
+    return f"User-agent: *\nAllow: /\n\nSitemap: {SITEMAP_URL}sitemap.xml\n"
+
+
 def list_standards(standards_dir: Path = STANDARDS_DIR) -> list[str]:
     """Return standard slugs present on disk (``*.md`` minus ``README``)."""
     return sorted(
@@ -459,8 +575,37 @@ def sync_index(entries: list[dict[str, Any]], check: bool, root: Path = REPO_ROO
                 new, "standardsCount", str(len(present)), index_path
             )
 
+    # Server-rendered filters, cards, and hero stats (no-JS / crawler view).
+    if "<!-- registry:filters:start -->" in new:
+        new = replace_between(
+            new, "<!-- registry:filters:start -->", "<!-- registry:filters:end -->",
+            render_filters(entries), index_path,
+        )
+    if "<!-- registry:cards:start -->" in new:
+        new = replace_between(
+            new, "<!-- registry:cards:start -->", "<!-- registry:cards:end -->",
+            render_static_cards(entries), index_path,
+        )
+    stats = aggregate_stats(entries)
+    for elem_id, key in (
+        ("stat-repos", "repos"), ("stat-skills", "skills"),
+        ("stat-rules", "rules"), ("stat-mcp", "mcpTools"),
+    ):
+        if f'id="{elem_id}"' in new:
+            new = replace_element_text_by_id(new, elem_id, str(stats[key]), index_path)
+
     html_drift = write_if_changed(index_path, current, new, check, root)
-    return html_drift or search_drift
+
+    # Crawler files live next to the page; only managed when already present
+    # so a minimal catalog is not forced to carry them.
+    seo_drift = False
+    for name, body in (("sitemap.xml", render_sitemap()), ("robots.txt", render_robots())):
+        path = root / "docs" / name
+        if path.is_file():
+            seo_drift |= write_if_changed(
+                path, path.read_text(encoding="utf-8"), body, check, root
+            )
+    return html_drift or search_drift or seo_drift
 
 
 def write_if_changed(
 
@@ -40,6 +40,19 @@
 VALID_ARCHETYPES = {"deployed-service"}
 VALID_LICENSES = {"CC-BY-NC-ND-4.0", "CC-BY-NC-ND-4.0 AND MIT", "MIT", "Apache-2.0"}
 NPM_SCOPE = "@tmhs/"
+# Catalog filter categories, in display order. The catalog site renders one
+# filter chip per category in use (scripts/sync_from_registry.py).
+CATEGORIES: dict[str, str] = {
+    "game-dev": "Game Dev",
+    "3d-media": "3D & Media",
+    "infrastructure": "Infrastructure",
+    "ai": "Local AI",
+    "mobile": "Mobile",
+    "fintech": "Fintech",
+    "productivity": "Productivity",
+    "developer-tooling": "Developer Tooling",
+}
+DEFAULT_CATEGORY = "developer-tooling"
 COUNT_FIELDS = ("skills", "rules", "mcpTools")
 
 
@@ -86,6 +99,9 @@ def validate(data: Any) -> list[str]:
         if tool.get("license") not in VALID_LICENSES:
             errors.append("%s: license must be one of %s" % (label, sorted(VALID_LICENSES)))
 
+        if "category" in tool and tool["category"] not in CATEGORIES:
+            errors.append("%s: category must be one of %s" % (label, list(CATEGORIES)))
+
         topics = tool.get("topics", [])
         if isinstance(topics, list) and not all(isinstance(t, str) for t in topics):
             errors.append("%s: topics must be array of strings" % label)