diff --git a/.env.example b/.env.example
index e092682..f7e8c8d 100644
--- a/.env.example
+++ b/.env.example
@@ -86,4 +86,8 @@ KIT_MATTERMOST_URL=http://100.68.122.24:8065
 KIT_MATTERMOST_TOKEN=
 KIT_MATTERMOST_USER_ID=zdunkip7xjy1ukn9xd8wt5kqrc
 JORDAN_MATTERMOST_USER_ID=zh5bhphuqfdtffks1nys4e76ie
+LEXI_MATTERMOST_USER_ID=7satyicgxpfq5grdsuty9g3cuw
+KIT_MATTERMOST_TEAM=dhoh8n1xkjfgzy7s63ufckb9ko
 KIT_MATTERMOST_CHANNEL=3r1tnxhe5fgcmjxgrspm7316oc
+KIT_MATTERMOST_DM=3r1tnxhe5fgcmjxgrspm7316oc
+KIT_MATTERMOST_HALLWAY=9sp18hgiaiybtj9p5nm8uw3sna
diff --git a/README.md b/README.md
index 2cf776e..15f9a49 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,7 @@ This is Lexi's `instructions()` idea (identity + domain + boot + scratch + missi
 | `YouTubeTranscript` | Full captions via `yt-dlp` (timestamps). Not Lexi's 8k clip. |
 | `MemoryStore` / `MemorySearch` | File-backed `knowledge_kilt`. |
 | `AskLexi` | Shells to `~/.grok/kit/ask-lexi` (her MCP). Taste / life only. |
+| `ChannelCreate` | Find or create a Mattermost open channel. `php artisan kit:channel` / `mm create`. |
 
 Next (not built): `BlenderRun`, `LookCompare` (run Playwright), `GitHubOpenIssue`.
 
diff --git a/app/Agent/KitAgent.php b/app/Agent/KitAgent.php
index 11af12c..979b574 100644
--- a/app/Agent/KitAgent.php
+++ b/app/Agent/KitAgent.php
@@ -5,6 +5,7 @@
 use App\Tools\AskLexi;
 use App\Tools\BoardWrite;
 use App\Tools\CatalogRead;
+use App\Tools\ChannelCreate;
 use App\Tools\HeartbeatRead;
 use App\Tools\LookReport;
 use App\Tools\MemorySearch;
@@ -28,6 +29,7 @@ public function tools(): iterable
         return [
             new CatalogRead,
             new HeartbeatRead,
+            new ChannelCreate,
             new BoardWrite,
             new LookReport,
             new YouTubeTranscript,
diff --git a/app/Console/Commands/ChannelCommand.php b/app/Console/Commands/ChannelCommand.php
new file mode 100644
index 0000000..af92f56
--- /dev/null
+++ b/app/Console/Commands/ChannelCommand.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Mattermost\Client;
+use Illuminate\Console\Command;
+
+class ChannelCommand extends Command
+{
+    protected $signature = 'kit:channel
+        {name : Channel slug}
+        {--display= : Display name}
+        {--purpose= : Purpose}
+        {--add= : Comma @users or ids}';
+
+    protected $description = 'Find or create a Mattermost open channel';
+
+    public function handle(Client $mm): int
+    {
+        $out = $mm->createChannel(
+            (string) $this->argument('name'),
+            (string) $this->option('display'),
+            (string) $this->option('purpose'),
+        );
+        if (isset($out['error'])) {
+            $this->error($out['error']);
+
+            return self::FAILURE;
+        }
+
+        $add = trim((string) $this->option('add'));
+        if ($add !== '') {
+            foreach (preg_split('/\s*,\s*/', $add) ?: [] as $who) {
+                $uid = $mm->resolveUser($who);
+                if ($uid !== null) {
+                    $mm->addMember($out['id'], $uid);
+                }
+            }
+        }
+
+        $this->line((($out['created'] ?? false) ? 'created' : 'exists').' '.$out['id']);
+
+        return self::SUCCESS;
+    }
+}
diff --git a/app/Mattermost/Client.php b/app/Mattermost/Client.php
index 6aeffa1..3f3249d 100644
--- a/app/Mattermost/Client.php
+++ b/app/Mattermost/Client.php
@@ -2,6 +2,7 @@
 
 namespace App\Mattermost;
 
+use Illuminate\Http\Client\PendingRequest;
 use Illuminate\Support\Facades\Http;
 use Illuminate\Support\Facades\Log;
 
@@ -9,20 +10,109 @@ class Client
 {
     public function post(string $channel, string $text): void
     {
-        $url = rtrim((string) config('kit.mattermost.url'), '/');
-        $token = (string) config('kit.mattermost.token');
-        if ($url === '' || $token === '' || $channel === '') {
+        if ($this->base() === null || $channel === '') {
             Log::warning('kit mm post skipped: missing url/token/channel');
 
             return;
         }
 
-        Http::timeout(20)
-            ->withToken($token)
-            ->acceptJson()
-            ->post($url.'/api/v4/posts', [
-                'channel_id' => $channel,
-                'message' => $text,
-            ]);
+        $this->http()->post($this->base().'/api/v4/posts', [
+            'channel_id' => $channel,
+            'message' => $text,
+        ]);
+    }
+
+    /**
+     * Find or create an open team channel. Returns id + created flag.
+     *
+     * @return array{id: string, name: string, created: bool}|array{error: string}
+     */
+    public function createChannel(string $name, string $display = '', string $purpose = ''): array
+    {
+        $slug = $this->slug($name);
+        if ($slug === '') {
+            return ['error' => 'channel name required'];
+        }
+        $base = $this->base();
+        $team = (string) config('kit.mattermost.team_id');
+        if ($base === null || $team === '') {
+            return ['error' => 'mattermost url/token/team missing'];
+        }
+
+        $existing = $this->http()->get($base.'/api/v4/teams/'.$team.'/channels/name/'.$slug);
+        if ($existing->successful() && is_string($existing->json('id'))) {
+            return ['id' => $existing->json('id'), 'name' => $slug, 'created' => false];
+        }
+
+        $res = $this->http()->post($base.'/api/v4/channels', [
+            'team_id' => $team,
+            'name' => $slug,
+            'display_name' => $display !== '' ? $display : $slug,
+            'purpose' => $purpose,
+            'type' => 'O',
+        ]);
+        if (! $res->successful() || ! is_string($res->json('id'))) {
+            return ['error' => 'create failed: '.($res->json('message') ?? $res->status())];
+        }
+
+        return ['id' => $res->json('id'), 'name' => $slug, 'created' => true];
+    }
+
+    public function addMember(string $channel, string $userId): bool
+    {
+        $base = $this->base();
+        if ($base === null || $channel === '' || $userId === '') {
+            return false;
+        }
+        $res = $this->http()->post($base.'/api/v4/channels/'.$channel.'/members', [
+            'user_id' => $userId,
+        ]);
+
+        return $res->successful();
+    }
+
+    public function resolveUser(string $who): ?string
+    {
+        $who = ltrim(trim($who), '@');
+        if ($who === '') {
+            return null;
+        }
+        $base = $this->base();
+        if ($base === null) {
+            return null;
+        }
+        if (strlen($who) === 26 && ctype_alnum($who)) {
+            return $who;
+        }
+        $res = $this->http()->get($base.'/api/v4/users/username/'.$who);
+        $id = $res->json('id');
+
+        return is_string($id) && $id !== '' ? $id : null;
+    }
+
+    private function slug(string $name): string
+    {
+        $name = strtolower(trim($name));
+        $name = ltrim($name, '#');
+
+        return preg_replace('/[^a-z0-9-]/', '-', $name) ?? '';
+    }
+
+    private function http(): PendingRequest
+    {
+        return Http::timeout(20)
+            ->withToken((string) config('kit.mattermost.token'))
+            ->acceptJson();
+    }
+
+    private function base(): ?string
+    {
+        $url = rtrim((string) config('kit.mattermost.url'), '/');
+        $token = (string) config('kit.mattermost.token');
+        if ($url === '' || $token === '') {
+            return null;
+        }
+
+        return $url;
     }
 }
diff --git a/app/Tools/ChannelCreate.php b/app/Tools/ChannelCreate.php
new file mode 100644
index 0000000..ac1616e
--- /dev/null
+++ b/app/Tools/ChannelCreate.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace App\Tools;
+
+use App\Mattermost\Client;
+use Illuminate\Contracts\JsonSchema\JsonSchema;
+use Laravel\Ai\Contracts\Tool;
+use Laravel\Ai\Tools\Request;
+use Stringable;
+
+readonly class ChannelCreate implements Tool
+{
+    public function description(): Stringable|string
+    {
+        return 'Find or create a Mattermost open channel on the factory team. '
+            .'Pass name (slug). Optional display, purpose, and add (comma @users or ids). '
+            .'Returns channel id. Use for hallway channels. Does not post as a second mouth.';
+    }
+
+    public function schema(JsonSchema $schema): array
+    {
+        return [
+            'name' => $schema->string()->description('Channel slug, e.g. mesa-studio.')->required(),
+            'display' => $schema->string()->description('Optional display name.'),
+            'purpose' => $schema->string()->description('Optional purpose line.'),
+            'add' => $schema->string()->description('Optional comma @usernames or user ids to add.'),
+        ];
+    }
+
+    public function handle(Request $request): Stringable|string
+    {
+        $name = trim((string) ($request['name'] ?? ''));
+        $mm = app(Client::class);
+        $out = $mm->createChannel(
+            $name,
+            trim((string) ($request['display'] ?? '')),
+            trim((string) ($request['purpose'] ?? '')),
+        );
+        if (isset($out['error'])) {
+            return 'channel: '.$out['error'];
+        }
+
+        $added = [];
+        $add = trim((string) ($request['add'] ?? ''));
+        if ($add !== '') {
+            foreach (preg_split('/\s*,\s*/', $add) ?: [] as $who) {
+                $uid = $mm->resolveUser($who);
+                if ($uid !== null && $mm->addMember($out['id'], $uid)) {
+                    $added[] = $who;
+                }
+            }
+        }
+
+        $flag = ($out['created'] ?? false) ? 'created' : 'exists';
+
+        return $flag.' #'.$out['name'].' id='.$out['id']
+            .($added !== [] ? ' added='.implode(',', $added) : '');
+    }
+}
diff --git a/config/kit.php b/config/kit.php
index 98abf80..43417ee 100644
--- a/config/kit.php
+++ b/config/kit.php
@@ -23,6 +23,10 @@
         'token' => env('KIT_MATTERMOST_TOKEN', ''),
         'user_id' => env('KIT_MATTERMOST_USER_ID', 'zdunkip7xjy1ukn9xd8wt5kqrc'),
         'jordan_user_id' => env('JORDAN_MATTERMOST_USER_ID', 'zh5bhphuqfdtffks1nys4e76ie'),
+        'lexi_user_id' => env('LEXI_MATTERMOST_USER_ID', '7satyicgxpfq5grdsuty9g3cuw'),
+        'team_id' => env('KIT_MATTERMOST_TEAM', 'dhoh8n1xkjfgzy7s63ufckb9ko'),
         'channel_id' => env('KIT_MATTERMOST_CHANNEL', '3r1tnxhe5fgcmjxgrspm7316oc'),
+        'hallway_id' => env('KIT_MATTERMOST_HALLWAY', '9sp18hgiaiybtj9p5nm8uw3sna'),
+        'dm_id' => env('KIT_MATTERMOST_DM', '3r1tnxhe5fgcmjxgrspm7316oc'),
     ],
 ];
diff --git a/tests/Feature/ChannelCreateTest.php b/tests/Feature/ChannelCreateTest.php
new file mode 100644
index 0000000..0363768
--- /dev/null
+++ b/tests/Feature/ChannelCreateTest.php
@@ -0,0 +1,57 @@
+<?php
+
+use App\Mattermost\Client;
+use App\Tools\ChannelCreate;
+use Illuminate\Support\Facades\Http;
+use Laravel\Ai\Tools\Request;
+
+beforeEach(function () {
+    config([
+        'kit.mattermost.url' => 'http://mm.test',
+        'kit.mattermost.token' => 'tok',
+        'kit.mattermost.team_id' => 'team-1',
+    ]);
+});
+
+test('returns existing channel without creating', function () {
+    Http::fake([
+        'http://mm.test/api/v4/teams/team-1/channels/name/mesa-studio' => Http::response([
+            'id' => 'ch-exists',
+            'name' => 'mesa-studio',
+        ], 200),
+    ]);
+
+    $out = (string) (new ChannelCreate)->handle(new Request(['name' => 'mesa-studio']));
+
+    expect($out)->toBe('exists #mesa-studio id=ch-exists');
+    Http::assertNotSent(fn ($req) => $req->url() === 'http://mm.test/api/v4/channels' && $req->method() === 'POST');
+});
+
+test('creates an open channel and adds members', function () {
+    Http::fake([
+        'http://mm.test/api/v4/teams/team-1/channels/name/shop-floor' => Http::response(['id' => 'missing'], 404),
+        'http://mm.test/api/v4/channels' => Http::response(['id' => 'ch-new', 'name' => 'shop-floor'], 201),
+        'http://mm.test/api/v4/users/username/jordan' => Http::response(['id' => 'u-j'], 200),
+        'http://mm.test/api/v4/channels/ch-new/members' => Http::response(['user_id' => 'u-j'], 201),
+    ]);
+
+    $out = (string) (new ChannelCreate)->handle(new Request([
+        'name' => 'Shop Floor',
+        'purpose' => 'factory',
+        'add' => '@jordan',
+    ]));
+
+    expect($out)->toBe('created #shop-floor id=ch-new added=@jordan');
+});
+
+test('client slugs names', function () {
+    Http::fake([
+        'http://mm.test/api/v4/teams/team-1/channels/name/mesa-studio' => Http::response([
+            'id' => 'ch-1',
+            'name' => 'mesa-studio',
+        ], 200),
+    ]);
+
+    $out = (new Client)->createChannel('#Mesa Studio');
+    expect($out)->toMatchArray(['id' => 'ch-1', 'created' => false, 'name' => 'mesa-studio']);
+});