diff --git a/.github/workflows/validate-plugin-submission.yml b/.github/workflows/validate-plugin-submission.yml
new file mode 100644
index 0000000..05179d1
--- /dev/null
+++ b/.github/workflows/validate-plugin-submission.yml
@@ -0,0 +1,31 @@
+name: Validate plugin submission
+
+on:
+  pull_request:
+    paths:
+      - "catalogue.json"
+      - "icons/**"
+      - "validate_submission.py"
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    name: Validate plugin submission
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out pull request
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.x"
+
+      - name: Validate catalogue submission
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+        run: python validate_submission.py --base "${{ github.event.pull_request.base.sha }}" --head "${{ github.event.pull_request.head.sha }}"
diff --git a/README.md b/README.md
index a4b9705..e18471f 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,5 @@ To submit your plugin to the OpenAction Marketplace, please follow these steps:
 4. **Add an Icon**: Add a high-resolution icon representing your plugin to the `icons/` directory. The icon should match the icon provided in your plugin's manifest / bundle. The file should be named matching your plugin's bundle ID (e.g. `com.yourname.plugin.png`). *Note: You do not need to run the `format_icons.py` script yourself; a maintainer will run it in a standardised environment to format your icon when reviewing your submission.*
 
 Once you have added your entry to the appropriate section, submit a Pull Request to this repository for review.
+
+Pull requests that change the catalogue are checked automatically. The check verifies the repository topic, manifest metadata, repository description, bundle ID, latest-release artifacts, icon format and resolution, section placement, and repository URL ordering before maintainers review the submission.
diff --git a/catalogue.json b/catalogue.json
index 8267bad..5348ad5 100644
--- a/catalogue.json
+++ b/catalogue.json
@@ -128,6 +128,15 @@
 		"repository": "https://github.com/mdvictor/opendeck-volume-controller",
 		"description": "A per-application volume control plugin for the Stream Deck using OpenDeck on Linux."
 	},
+	"io.github.millenniumambiguity.warthunder": {
+		"name": "War Thunder Telemetry",
+		"author": "millennIumAMbiguity",
+		"repository": "https://github.com/millennIumAMbiguity/opendeck-warthunder",
+		"description": "Live War Thunder flight data on Stream Deck keys and the Saitek Multi Panel, for OpenDeck",
+		"flags": {
+			"ai_assisted": true
+		}
+	},
 	"fr.jourdois.pipewire": {
 		"name": "PipeWire Audio (Native)",
 		"author": "Stephane Jourdois",
@@ -209,6 +218,15 @@
 		"repository": "https://github.com/MikaBust/opendeck-duo87",
 		"description": "An unofficial plugin for the Womier DUO87 keyboard's detachable screen module."
 	},
+	"io.github.millenniumambiguity.saitekmultipanel": {
+		"name": "Saitek Pro Flight Multi Panel",
+		"author": "millennIumAMbiguity",
+		"repository": "https://github.com/millennIumAMbiguity/opendeck-saitek-multipanel",
+		"description": "OpenDeck device plugin for the Logitech/Saitek Pro Flight Multi Panel",
+		"flags": {
+			"ai_assisted": true
+		}
+	},
 	"com.monkeykiller.plugins.opendeck-ss550": {
 		"name": "Redragon Streamcraft SS550",
 		"author": "MonkeyKiller",
diff --git a/icons/io.github.millenniumambiguity.saitekmultipanel.png b/icons/io.github.millenniumambiguity.saitekmultipanel.png
new file mode 100644
index 0000000..52b8d35
Binary files /dev/null and b/icons/io.github.millenniumambiguity.saitekmultipanel.png differ
diff --git a/icons/io.github.millenniumambiguity.warthunder.png b/icons/io.github.millenniumambiguity.warthunder.png
new file mode 100644
index 0000000..afc84a9
Binary files /dev/null and b/icons/io.github.millenniumambiguity.warthunder.png differ
diff --git a/validate_submission.py b/validate_submission.py
new file mode 100644
index 0000000..a856da2
--- /dev/null
+++ b/validate_submission.py
@@ -0,0 +1,259 @@
+"""Validate plugin catalogue submissions in a pull request."""
+
+from __future__ import annotations
+
+import argparse
+import base64
+import json
+import os
+import struct
+import subprocess
+import sys
+from pathlib import Path
+from urllib.error import HTTPError, URLError
+from urllib.parse import urlparse
+from urllib.request import Request, urlopen
+
+CATALOGUE = Path("catalogue.json")
+ICONS = Path("icons")
+
+SECTION_NAMES = ("official", "native", "device", "stream-deck")
+ALLOWED_SECTIONS = {"native", "device"}
+
+
+class ValidationError(Exception):
+	pass
+
+
+def load_catalogue(path: Path) -> dict[str, dict]:
+	try:
+		with path.open(encoding="utf-8") as file:
+			return json.load(file, object_pairs_hook=_unique_object)
+	except (OSError, json.JSONDecodeError) as exc:
+		raise ValidationError(f"{path} is not valid JSON: {exc}") from exc
+
+
+def load_catalogue_text(contents: str) -> dict[str, dict]:
+	try:
+		return json.loads(contents, object_pairs_hook=_unique_object)
+	except json.JSONDecodeError as exc:
+		raise ValidationError(f"catalogue is not valid JSON: {exc}") from exc
+
+
+def validate_catalogue_format(path: Path, catalogue: dict[str, dict]) -> None:
+	try:
+		contents = path.read_text(encoding="utf-8")
+	except OSError as exc:
+		raise ValidationError(f"could not read {path}: {exc}") from exc
+
+	for line_number, line in enumerate(contents.splitlines(), start=1):
+		if line.rstrip() != line:
+			raise ValidationError(f"{path}:{line_number}: trailing whitespace is not allowed")
+		if line and line[0] == " ":
+			raise ValidationError(f"{path}:{line_number}: indentation must use tabs")
+	if not contents.endswith("\n"):
+		raise ValidationError(f"{path}: file must end with a newline")
+
+	expected = json.dumps(catalogue, indent="\t", ensure_ascii=False) + "\n"
+	if contents != expected:
+		raise ValidationError(
+			f"{path}: formatting must match tab-indented JSON generated by json.dumps"
+		)
+
+
+def _unique_object(pairs: list[tuple[str, object]]) -> dict:
+	result: dict[str, object] = {}
+	for key, value in pairs:
+		if key in result:
+			raise ValidationError(f"duplicate catalogue key: {key}")
+		result[key] = value
+	return result
+
+
+def changed_files(base: str, head: str) -> set[str]:
+	output = subprocess.check_output(
+		["git", "diff", "--name-only", f"{base}...{head}", "--"],
+		text=True,
+	)
+	return {line for line in output.splitlines() if line}
+
+
+def section_for(plugin_id: str, catalogue: dict[str, dict]) -> str:
+	ids = list(catalogue)
+	try:
+		index = ids.index(plugin_id)
+	except ValueError as exc:
+		raise ValidationError(f"{plugin_id} is not present in the catalogue") from exc
+
+	section_starts = catalogue_section_starts(catalogue)
+	for position, start in enumerate(section_starts):
+		end = section_starts[position + 1] if position + 1 < len(section_starts) else len(ids)
+		if start <= index < end:
+			return SECTION_NAMES[position]
+	raise ValidationError(f"could not determine the catalogue section for {plugin_id}")
+
+
+def catalogue_section_starts(catalogue: dict[str, dict]) -> list[int]:
+	"""Find section starts from the URL sort resets in the ordered catalogue."""
+	ids = list(catalogue)
+	repositories = [catalogue[plugin_id].get("repository", "").casefold() for plugin_id in ids]
+	resets = [
+		index for index in range(1, len(ids)) if repositories[index] < repositories[index - 1]
+	]
+	if len(resets) < len(SECTION_NAMES) - 1:
+		raise ValidationError("could not determine all catalogue sections from repository ordering")
+	return [0, *resets[: len(SECTION_NAMES) - 1]]
+
+
+def validate_order(catalogue: dict[str, dict], relevant_ids: set[str]) -> None:
+	ids = list(catalogue)
+	for plugin_id in relevant_ids:
+		section = section_for(plugin_id, catalogue)
+		if section not in ALLOWED_SECTIONS:
+			continue
+		index = ids.index(plugin_id)
+		repository = catalogue[plugin_id].get("repository", "")
+		if (
+			index
+			and catalogue[ids[index - 1]].get("repository", "").casefold() > repository.casefold()
+		):
+			raise ValidationError(f"{plugin_id}: plugin is not sorted by repository URL")
+		if (
+			index + 1 < len(ids)
+			and repository.casefold() > catalogue[ids[index + 1]].get("repository", "").casefold()
+		):
+			raise ValidationError(f"{plugin_id}: plugin is not sorted by repository URL")
+
+
+def github_json(path: str) -> dict:
+	url = f"https://api.github.com{path}"
+	headers = {"Accept": "application/vnd.github+json", "X-GitHub-Api-Version": "2022-11-28"}
+	token = os.environ.get("GITHUB_TOKEN")
+	if token:
+		headers["Authorization"] = "Bearer " + token
+	try:
+		with urlopen(Request(url, headers=headers), timeout=20) as response:
+			return json.load(response)
+	except (HTTPError, URLError, TimeoutError, json.JSONDecodeError) as exc:
+		raise ValidationError(f"GitHub API request failed for {path}: {exc}") from exc
+
+
+def repository_parts(url: str) -> tuple[str, str]:
+	parsed = urlparse(url)
+	if parsed.scheme != "https" or parsed.netloc.lower() != "github.com":
+		raise ValidationError(f"repository must be an HTTPS GitHub URL: {url}")
+	parts = parsed.path.strip("/").split("/")
+	if len(parts) != 2 or not all(parts):
+		raise ValidationError(f"repository URL must identify an owner and repository: {url}")
+	return parts[0], parts[1].removesuffix(".git")
+
+
+def validate_repository(plugin_id: str, entry: dict, changed: set[str]) -> None:
+	for field in ("name", "author", "repository", "description"):
+		if field not in entry:
+			raise ValidationError(f"{plugin_id}: missing catalogue field '{field}'")
+
+	owner, repo = repository_parts(entry["repository"])
+	repo_info = github_json(f"/repos/{owner}/{repo}")
+	release = github_json(f"/repos/{owner}/{repo}/releases/latest")
+	if not any(
+		asset.get("name", "").lower().endswith((".zip", ".streamdeckplugin"))
+		for asset in release.get("assets", [])
+	):
+		raise ValidationError(
+			f"{plugin_id}: latest release must include a .zip or .streamDeckPlugin artifact"
+		)
+	if "openaction" not in github_json(f"/repos/{owner}/{repo}/topics").get("names", []):
+		raise ValidationError(f"{plugin_id}: repository is missing the openaction topic")
+	if entry["description"] != repo_info.get("description"):
+		raise ValidationError(
+			f"{plugin_id}: description does not match the repository sidebar description"
+		)
+
+	tree = github_json(
+		f"/repos/{owner}/{repo}/git/trees/{repo_info['default_branch']}?recursive=1"
+	).get("tree", [])
+	manifest_paths = [
+		item["path"]
+		for item in tree
+		if item.get("type") == "blob" and item["path"].endswith("manifest.json")
+	]
+	if not manifest_paths:
+		raise ValidationError(f"{plugin_id}: could not find a manifest.json in the repository")
+	manifest_path = (
+		"assets/manifest.json" if "assets/manifest.json" in manifest_paths else manifest_paths[0]
+	)
+	manifest_response = github_json(f"/repos/{owner}/{repo}/contents/{manifest_path}")
+	try:
+		manifest = json.loads(base64.b64decode(manifest_response["content"]).decode("utf-8"))
+	except (KeyError, ValueError, UnicodeDecodeError, json.JSONDecodeError) as exc:
+		raise ValidationError(f"{plugin_id}: manifest.json is not valid JSON") from exc
+	if manifest.get("Name") != entry["name"] or manifest.get("Author") != entry["author"]:
+		raise ValidationError(f"{plugin_id}: name and author must match manifest.json")
+	action_ids = [action.get("UUID", "") for action in manifest.get("Actions", [])]
+	if action_ids and not any(action_id.startswith(f"{plugin_id}.") for action_id in action_ids):
+		raise ValidationError(f"{plugin_id}: catalogue key is not the manifest bundle ID")
+
+	icon_path = ICONS / f"{plugin_id}.png"
+	if not icon_path.is_file():
+		raise ValidationError(f"{plugin_id}: missing icon {icon_path}")
+	if plugin_id not in {path.removeprefix("icons/").removesuffix(".png") for path in changed}:
+		raise ValidationError(f"{plugin_id}: submission must add or update its icon")
+	try:
+		with icon_path.open("rb") as icon:
+			if icon.read(8) != b"\x89PNG\r\n\x1a\n":
+				raise ValueError("not a PNG")
+			length = struct.unpack(">I", icon.read(4))[0]
+			if icon.read(4) != b"IHDR" or length < 8:
+				raise ValueError("missing PNG dimensions")
+			width, height = struct.unpack(">II", icon.read(8))
+	except (OSError, ValueError, struct.error) as exc:
+		raise ValidationError(f"{plugin_id}: icon is not a valid PNG") from exc
+	if width < 144 or height < 144:
+		raise ValidationError(f"{plugin_id}: icon must be at least 144x144 pixels")
+
+
+def main() -> int:
+	parser = argparse.ArgumentParser()
+	parser.add_argument("--base", required=True)
+	parser.add_argument("--head", default="HEAD")
+	args = parser.parse_args()
+	try:
+		base_catalogue = load_catalogue_text(
+			subprocess.check_output(["git", "show", f"{args.base}:catalogue.json"], text=True)
+		)
+		head_catalogue = load_catalogue(CATALOGUE)
+		validate_catalogue_format(CATALOGUE, head_catalogue)
+		changed = changed_files(args.base, args.head)
+		changed_ids = {
+			plugin_id
+			for plugin_id in set(base_catalogue) | set(head_catalogue)
+			if base_catalogue.get(plugin_id) != head_catalogue.get(plugin_id)
+		}
+		if not changed_ids:
+			print("No catalogue entries changed; plugin submission checks skipped.")
+			return 0
+		validate_order(head_catalogue, changed_ids)
+		list(head_catalogue)
+		for plugin_id in changed_ids:
+			if plugin_id not in head_catalogue:
+				raise ValidationError(
+					f"{plugin_id}: catalogue entries may not be removed in a submission PR"
+				)
+			section = section_for(plugin_id, head_catalogue)
+			if section not in ALLOWED_SECTIONS:
+				raise ValidationError(
+					f"{plugin_id}: submissions are only allowed in Native or Device sections"
+				)
+			validate_repository(plugin_id, head_catalogue[plugin_id], changed)
+		print(
+			f"Validated {len(changed_ids)} plugin catalogue entr{'y' if len(changed_ids) == 1 else 'ies'}."
+		)
+		return 0
+	except (ValidationError, subprocess.CalledProcessError) as exc:
+		print(f"::error::{exc}", file=sys.stderr)
+		return 1
+
+
+if __name__ == "__main__":
+	sys.exit(main())