diff --git a/.editorconfig b/.editorconfig
index c602028..ba5b634 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -11,3 +11,9 @@ trim_trailing_whitespace = true
 # Markdown files can have flexible indentation for lists
 [*.md]
 indent_size = unset
+
+[.mise.toml]
+max_line_length = off
+
+[*.dart]
+max_line_length = off
diff --git a/.mise.toml b/.mise.toml
index 3f6416f..fac192a 100644
--- a/.mise.toml
+++ b/.mise.toml
@@ -5,6 +5,7 @@ action-validator = "latest"
 "chromedriver" = "146"
 cmake = "latest"
 codex = "latest"
+dart = { version = "latest", url = "https://storage.googleapis.com/dart-archive/channels/stable/release/{{ version }}/sdk/dartsdk-{{ os() }}-{{ arch() }}-release.zip", version_expr = 'fromJSON(body).prefixes | filter({ # matches "^channels/stable/release/(\\d+\\.\\d+\\.\\d+)/$" }) | map({split(#, "/")[3]}) | sortVersions()', version_list_url = "https://storage.googleapis.com/storage/v1/b/dart-archive/o?prefix=channels/stable/release/&delimiter=/" }
 dprint = "latest"
 editorconfig-checker = "latest"
 gemini-cli = "latest"
@@ -22,6 +23,7 @@ typos = "latest"
 uv = "latest"
 
 [tasks]
+ec = "ec"
 editorconfig-check = "ec"
 ruff-check = "ruff check services/ws-modules/"
 ruff-fmt = "ruff format services/ws-modules/"
@@ -36,17 +38,24 @@ DPRINT_CACHE_DIR = "/tmp/dprint-cache"
 run = "dprint fmt"
 
 [tasks.fmt]
-depends = ["cargo-clippy-fix", "cargo-fmt", "dprint-fmt", "ruff-fmt", "taplo-fmt"]
+depends = ["cargo-clippy-fix", "cargo-fmt", "dart-fmt", "dprint-fmt", "ruff-fmt", "taplo-fmt"]
 description = "Run repository formatters"
 
 [tasks.install-nightly]
 run = "cargo +nightly fmt --version >/dev/null 2>&1 || rustup toolchain install nightly --component rustfmt"
 
+[tasks.dart-check]
+run = "dart analyze services/ws-modules/dart-comm1/"
+
+[tasks.dart-fmt]
+run = "dart format services/ws-modules/dart-comm1/"
+
 [tasks.check]
 depends = [
   "cargo-check",
   "cargo-clippy",
   "cargo-fmt-check",
+  "dart-check",
   "dprint-check",
   "editorconfig-check",
   "osv-scanner",
@@ -164,6 +173,11 @@ description = "Build the nfc workflow WASM module"
 dir = "services/ws-modules/nfc"
 run = "wasm-pack build . --target web"
 
+[tasks.build-ws-dart-comm1-module]
+description = "Build the dart-comm1 workflow module"
+dir = "services/ws-modules/dart-comm1"
+run = "dart compile js lib/dart_comm1.dart -o pkg/et_ws_dart_comm1_compiled.js --no-source-maps"
+
 [tasks.build-ws-pydata1-module]
 description = "Build the pydata1 Python workflow module"
 dir = "services/ws-modules/pydata1"
@@ -177,6 +191,7 @@ depends = [
   "build-ws-audio1-module",
   "build-ws-bluetooth-module",
   "build-ws-comm1-module",
+  "build-ws-dart-comm1-module",
   "build-ws-data1-module",
   "build-ws-face-detection-module",
   "build-ws-geolocation-module",
diff --git a/services/ws-modules/dart-comm1/.gitignore b/services/ws-modules/dart-comm1/.gitignore
new file mode 100644
index 0000000..3cceda5
--- /dev/null
+++ b/services/ws-modules/dart-comm1/.gitignore
@@ -0,0 +1,7 @@
+# https://dart.dev/guides/libraries/private-files
+# Created by `dart pub`
+.dart_tool/
+
+# Avoid committing pubspec.lock for library packages; see
+# https://dart.dev/guides/libraries/private-files#pubspeclock.
+pubspec.lock
diff --git a/services/ws-modules/dart-comm1/lib/dart_comm1.dart b/services/ws-modules/dart-comm1/lib/dart_comm1.dart
new file mode 100644
index 0000000..a3c9b28
--- /dev/null
+++ b/services/ws-modules/dart-comm1/lib/dart_comm1.dart
@@ -0,0 +1,155 @@
+import 'dart:async';
+import 'dart:js_interop';
+
+// JS interop declarations for et_ws_wasm_agent
+@JS()
+extension type WsClientConfig._(JSObject _) implements JSObject {
+  external factory WsClientConfig(String serverUrl);
+}
+
+@JS()
+extension type WsClient._(JSObject _) implements JSObject {
+  external factory WsClient(WsClientConfig config);
+  external void connect();
+  external void disconnect();
+  // ignore: non_constant_identifier_names
+  external String get_state();
+  // ignore: non_constant_identifier_names
+  external String get_client_id();
+  external void send(String message);
+  // ignore: non_constant_identifier_names
+  external void set_on_message(JSFunction callback);
+}
+
+// JS interop for browser globals
+@JS('window.location.protocol')
+external String get locationProtocol;
+
+@JS('window.location.host')
+external String get locationHost;
+
+@JS('document.getElementById')
+external JSObject? getElementById(String id);
+
+@JS()
+extension type _TextArea._(JSObject _) implements JSObject {
+  external String get value;
+  external set value(String v);
+}
+
+void appendOutput(String msg) {
+  final el = getElementById('module-output');
+  if (el != null) {
+    final ta = el as _TextArea;
+    ta.value = ta.value.isEmpty ? msg : '${ta.value}\n$msg';
+  }
+}
+
+void log(String msg) {
+  appendOutput('[dart-comm1] $msg');
+}
+
+String get wsUrl {
+  final proto = locationProtocol == 'https:' ? 'wss:' : 'ws:';
+  return '$proto//$locationHost/ws';
+}
+
+Future<void> sleep(int ms) {
+  final c = Completer<void>();
+  Timer(Duration(milliseconds: ms), c.complete);
+  return c.future;
+}
+
+Future<void> waitForConnected(WsClient client) async {
+  for (var i = 0; i < 100; i++) {
+    if (client.get_state() == 'connected') return;
+    await sleep(100);
+  }
+  throw Exception('Timeout waiting for WebSocket connection');
+}
+
+Future<String> waitForAgentId(WsClient client) async {
+  for (var i = 0; i < 100; i++) {
+    final id = client.get_client_id();
+    if (id.isNotEmpty) return id;
+    await sleep(100);
+  }
+  throw Exception('Timeout waiting for agent_id');
+}
+
+Future<void> run() async {
+  log('entered run()');
+
+  final client = WsClient(WsClientConfig(wsUrl));
+
+  String selfAgentId = '';
+  String? targetAgentId;
+
+  client.set_on_message(
+    ((JSString raw) {
+      final data = raw.toDart;
+      try {
+        // Parse type field manually to avoid a JSON dep
+        if (data.contains('"list_agents_response"')) {
+          // Extract first other connected agent id
+          final idMatches = RegExp(
+            r'"agent_id"\s*:\s*"([^"]+)"',
+          ).allMatches(data);
+          for (final m in idMatches) {
+            final id = m.group(1)!;
+            if (id != selfAgentId) {
+              targetAgentId = id;
+              break;
+            }
+          }
+        } else if (data.contains('"agent_message"') ||
+            data.contains('"message_status"')) {
+          log('received: $data');
+          appendOutput(data);
+        }
+      } catch (_) {}
+    }).toJS,
+  );
+
+  client.connect();
+  await waitForConnected(client);
+  selfAgentId = await waitForAgentId(client);
+  log('connected as $selfAgentId');
+
+  // Poll for a peer agent
+  while (targetAgentId == null) {
+    client.send('{"type":"list_agents"}');
+    await sleep(1000);
+  }
+
+  log('found peer $targetAgentId, sending broadcast');
+  client.send(
+    '{"type":"broadcast_message","message":{"module":"dart-comm1","step":"broadcast","from_agent_id":"$selfAgentId","message":"dart-comm1 broadcast to all other connected agents"}}',
+  );
+
+  await sleep(3000);
+
+  log('sending direct message to $targetAgentId');
+  client.send(
+    '{"type":"send_agent_message","to_agent_id":"$targetAgentId","message":{"module":"dart-comm1","step":"direct","from_agent_id":"$selfAgentId","message":"dart-comm1 direct message"}}',
+  );
+
+  await sleep(3000);
+  client.disconnect();
+  log('workflow complete');
+}
+
+@JS('dartComm1Run')
+external set _dartComm1Run(JSFunction f);
+
+void main() {
+  _dartComm1Run = (() {
+    return (() async {
+      try {
+        await run();
+      } catch (e, st) {
+        throw '$e\n$st'.toJS;
+      }
+    }().toJS);
+  }.toJS);
+}
diff --git a/services/ws-modules/dart-comm1/pkg/.gitignore b/services/ws-modules/dart-comm1/pkg/.gitignore
new file mode 100644
index 0000000..50ebc2b
--- /dev/null
+++ b/services/ws-modules/dart-comm1/pkg/.gitignore
@@ -0,0 +1 @@
+*_compiled*
diff --git a/services/ws-modules/dart-comm1/pkg/et_ws_dart_comm1.js b/services/ws-modules/dart-comm1/pkg/et_ws_dart_comm1.js
new file mode 100644
index 0000000..d6bf2c5
--- /dev/null
+++ b/services/ws-modules/dart-comm1/pkg/et_ws_dart_comm1.js
@@ -0,0 +1,34 @@
+// et_ws_dart_comm1.js — ES module shim for dart-comm1
+
+export default async function init() {
+  await new Promise((resolve, reject) => {
+    const s = document.createElement("script");
+    s.src = new URL("et_ws_dart_comm1_compiled.js", import.meta.url).href;
+    s.onload = resolve;
+    s.onerror = reject;
+    document.head.appendChild(s);
+  });
+}
+
+export async function run() {
+  if (typeof globalThis.dartComm1Run !== "function") {
+    throw new Error("dart-comm1: not initialized");
+  }
+  // Dart @JS() interop resolves against globalThis, so expose the wasm-agent
+  // classes there for the duration of the call.
+  const { WsClient, WsClientConfig } = await import("/pkg/et_ws_wasm_agent.js");
+  globalThis.WsClient = WsClient;
+  globalThis.WsClientConfig = WsClientConfig;
+  try {
+    const result = globalThis.dartComm1Run();
+    console.log("dart-comm1 dartComm1Run returned:", result, typeof result);
+    await result;
+  } catch (e) {
+    console.error("dart-comm1 raw error:", e, "boxed:", e?.error);
+    const msg = e?.error?.toString?.() ?? e?.message ?? String(e);
+    throw new Error(msg);
+  } finally {
+    delete globalThis.WsClient;
+    delete globalThis.WsClientConfig;
+  }
+}
diff --git a/services/ws-modules/dart-comm1/pkg/package.json b/services/ws-modules/dart-comm1/pkg/package.json
new file mode 100644
index 0000000..23b0bef
--- /dev/null
+++ b/services/ws-modules/dart-comm1/pkg/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "et-ws-dart-comm1",
+  "type": "module",
+  "description": "dart comm1",
+  "version": "0.1.0",
+  "license": "Apache-2.0 OR MIT",
+  "main": "et_ws_dart_comm1.js"
+}
diff --git a/services/ws-modules/dart-comm1/pubspec.yaml b/services/ws-modules/dart-comm1/pubspec.yaml
new file mode 100644
index 0000000..c7d3aef
--- /dev/null
+++ b/services/ws-modules/dart-comm1/pubspec.yaml
@@ -0,0 +1,13 @@
+name: et_dart_comm1
+description: dart-comm1 workflow module
+version: 0.1.0
+repository: https://github.com/edge-toolkit/core
+
+environment:
+  sdk: ^3.11.5
+
+dependencies:
+  web: ^1.1.0
+
+dev_dependencies:
+  lints: ^6.0.0