diff --git a/app/Devnull/IssueCommand.php b/app/Devnull/IssueCommand.php
index 57a1cb2..58376dc 100644
--- a/app/Devnull/IssueCommand.php
+++ b/app/Devnull/IssueCommand.php
@@ -8,7 +8,7 @@
 
 /**
  * The web's `/feature` and `/bug` commands, which turn a new commit's draft
- * into a public issue on nunomaduro/dev-null.sh, opened by devnull's GitHub
+ * into a public issue on dev-null-sh/dev-null.sh, opened by devnull's GitHub
  * App and crediting you. The wording, and when each is suggested, are the
  * web's (resources/js/lib/issue-commands.ts).
  */
@@ -20,7 +20,7 @@ enum IssueCommand: string
     /**
      * Where the issue goes, as the web says it under the command.
      */
-    public const string Repository = 'nunomaduro/dev-null.sh';
+    public const string Repository = 'dev-null-sh/dev-null.sh';
 
     /**
      * Issues still need three literal characters and do not discount URLs.
diff --git a/app/Devnull/IssueEnvironment.php b/app/Devnull/IssueEnvironment.php
new file mode 100644
index 0000000..71b957b
--- /dev/null
+++ b/app/Devnull/IssueEnvironment.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Devnull;
+
+use Native\Mobile\Facades\Device;
+use Native\Mobile\Facades\System;
+
+/**
+ * What maintainers need to reproduce an issue opened from the app, as the
+ * web's collectEnvironment() sends its browser and screen: the app and its
+ * version, the system and its version, the language and the appearance.
+ * devnull puts them in a collapsed Environment table under the issue.
+ *
+ * It's kept coarse, since the issue is public, so never the phone's name. A
+ * detail the phone doesn't give is left out, and none is longer than devnull
+ * takes, so a long one can't stop the issue opening.
+ */
+final class IssueEnvironment
+{
+    public const int MaxLength = 100;
+
+    /**
+     * @return array<string, string>
+     */
+    public static function collect(): array
+    {
+        $info = json_decode((string) Device::getInfo(), true);
+        $info = is_array($info) ? $info : [];
+        $text = fn (string $key): string => is_string($info[$key] ?? null) ? $info[$key] : '';
+
+        $environment = [
+            'browser' => 'devnull app '.config('nativephp.version'),
+            'os' => $text('operatingSystem').' '.$text('osVersion'),
+            'language' => $text('language'),
+            'color_scheme' => System::appearance(),
+        ];
+
+        $environment = array_map(fn (string $value): string => mb_substr(trim($value), 0, self::MaxLength), $environment);
+
+        return array_filter($environment, fn (string $value): bool => $value !== '');
+    }
+}
diff --git a/app/NativeComponents/Concerns/DraftsIssues.php b/app/NativeComponents/Concerns/DraftsIssues.php
index 3580918..ffa1d0e 100644
--- a/app/NativeComponents/Concerns/DraftsIssues.php
+++ b/app/NativeComponents/Concerns/DraftsIssues.php
@@ -7,6 +7,7 @@
 use App\Devnull\DraftImages;
 use App\Devnull\Exceptions\ApiException;
 use App\Devnull\IssueCommand;
+use App\Devnull\IssueEnvironment;
 use App\Devnull\SiteLink;
 use App\Devnull\Stash;
 use App\Devnull\Toasts;
@@ -37,14 +38,16 @@
  * it, which offers the command with the draft kept. Its X stops the hints
  * on this phone, as the web's stops them in that browser.
  *
- * Opening the issue waits on GitHub, so it's sent in the background while the
- * button spins (see WritesInBackground). Once it's open the draft goes, with
- * any photos it had, and the sheet says "Opened issue #123." with View issue,
- * as the web's toast does, or a toast does, with View issue as its button, if
- * the sheet was swiped away by then (see SyncsOutbox::toastActionPressed()).
- * When it isn't, the draft stays an issue, with why under it: devnull's own
- * words when it sends them, else the web's, which say to check upstream when
- * the issue might have been opened anyway.
+ * Opening the issue waits on GitHub, so it's sent in the background while
+ * the button spins (see WritesInBackground), with the app and device
+ * details the web sends about its browser (see IssueEnvironment). Once it's
+ * open the draft goes, with any photos it had, and the sheet says "Opened
+ * issue #123." with View issue, as the web's toast does, or a toast does,
+ * with View issue as its button, if the sheet was swiped away by then (see
+ * SyncsOutbox::toastActionPressed()). When it isn't, the draft stays an
+ * issue, with why under it: devnull's own words when it sends them, else
+ * the web's, which say to check upstream when the issue might have been
+ * opened anyway.
  */
 trait DraftsIssues
 {
@@ -134,7 +137,7 @@ public function openIssueFromSheet(): void
         $this->openingIssue = true;
         $this->sheetError = null;
 
-        $this->writeInBackground('POST', Client::IssuesPath, ['command' => $command->command(), 'body' => $body], function (array $json): void {
+        $this->writeInBackground('POST', Client::IssuesPath, ['command' => $command->command(), 'body' => $body, 'environment' => IssueEnvironment::collect()], function (array $json): void {
             $number = is_int($json['number'] ?? null) ? $json['number'] : null;
             $url = is_string($json['url'] ?? null) ? $json['url'] : null;
             $stash = app(Stash::class);
diff --git a/resources/views/native/partials/issue-badge.blade.php b/resources/views/native/partials/issue-badge.blade.php
index 410db8c..b5cb86b 100644
--- a/resources/views/native/partials/issue-badge.blade.php
+++ b/resources/views/native/partials/issue-badge.blade.php
@@ -1,6 +1,7 @@
 {{--
     The web's IssueCommandBadge, over the field of a draft that's an issue: $command in a soft chip, whose X turns the
-    draft back into a commit, then where the issue goes. The X's target is the chip's full height.
+    draft back into a commit, then where the issue goes and what goes with it (see IssueEnvironment). That line wraps
+    rather than truncating, so the device details it mentions are never cut off. The X's target is the chip's full height.
 --}}
 <native:row ref="issue-badge" class="w-full gap-2 items-center">
     <native:row class="gap-[6] items-center pl-2 rounded-md bg-theme-primary-soft">
@@ -12,5 +13,5 @@
             </native:column>
         </native:pressable>
     </native:row>
-    <native:text class="flex-1 text-[13px] text-theme-ink-muted" :max-lines="1">Public issue on {{ \App\Devnull\IssueCommand::Repository }}, crediting you</native:text>
+    <native:text class="flex-1 text-[13px] text-theme-ink-muted">Public issue on {{ \App\Devnull\IssueCommand::Repository }}, crediting you, with your app and device details</native:text>
 </native:row>
diff --git a/tests/Feature/Screens/IssueCommandsTest.php b/tests/Feature/Screens/IssueCommandsTest.php
index c0299aa..d09611d 100644
--- a/tests/Feature/Screens/IssueCommandsTest.php
+++ b/tests/Feature/Screens/IssueCommandsTest.php
@@ -3,12 +3,14 @@
 use App\Devnull\Client;
 use App\Devnull\Data\StashedDraft;
 use App\Devnull\IssueCommand;
+use App\Devnull\IssueEnvironment;
 use App\Devnull\Stash;
 use App\NativeComponents\Log;
 use Illuminate\Http\Client\ConnectionException;
 use Illuminate\Http\Client\Request;
 use Illuminate\Support\Facades\Cache;
 use Illuminate\Support\Facades\Http;
+use Native\Mobile\Facades\System;
 use Native\Mobile\Testing\Native;
 use Native\Mobile\Testing\TestableComponent;
 use Victorycodedev\ToastKit\Events\ToastActionPressed;
@@ -29,7 +31,7 @@ function issueSheetOnLog(?array $answer = null): TestableComponent
 {
     serveApi([
         'GET /api/v1/log/following' => [pageJson([commitJson(['id' => 'c1', 'body' => 'An older commit', 'author' => userJson(['id' => 'u2', 'handle' => 'ada'])])])],
-        'POST /api/v1/issues' => $answer ?? [['number' => 123, 'url' => 'https://github.com/nunomaduro/dev-null.sh/issues/123'], 201],
+        'POST /api/v1/issues' => $answer ?? [['number' => 123, 'url' => 'https://github.com/dev-null-sh/dev-null.sh/issues/123'], 201],
     ]);
 
     return Native::visit('/log', platform: 'ios')->press('composeInSheet');
@@ -53,7 +55,10 @@ function hasRef(TestableComponent $screen, string $ref): bool
         ->and(hasRef($screen, 'sheet-open-issue'))->toBeTrue()
         ->and(hasRef($screen, 'sheet-commit'))->toBeFalse();
 
-    $screen->assertSee($command)->assertSee('Public issue on nunomaduro/dev-null.sh, crediting you');
+    $screen->assertSee($command)->assertSee('Public issue on dev-null-sh/dev-null.sh, crediting you, with your app and device details');
+
+    // It says what goes with the issue, so it wraps rather than being cut off.
+    expect(findNode(nodeByRef($screen, 'issue-badge'), fn (array $node): bool => str_starts_with($node['props']['text'] ?? '', 'Public issue on'))['props'])->not->toHaveKey('max_lines');
 })->with([
     'feature' => ['/feature Dark mode', '/feature', 'Dark mode', IssueCommand::Feature->placeholder()],
     'bug' => ['/bug ', '/bug', '', IssueCommand::Bug->placeholder()],
@@ -184,7 +189,8 @@ function hasRef(TestableComponent $screen, string $ref): bool
 
     Http::assertSent(fn (Request $request): bool => $request->method() === 'POST'
         && $request->url() === 'http://devnull.test/api/v1/'.Client::IssuesPath
-        && $request->body() === '{"command":"/bug","body":"Search loses its filters\n\nSteps: select PHP."}'
+        && $request['command'] === '/bug'
+        && $request['body'] === "Search loses its filters\n\nSteps: select PHP."
         && $request->hasHeader('X-SSH-Signature'));
 
     expect(issueRequestsSent())->toBe(1)
@@ -195,7 +201,7 @@ function hasRef(TestableComponent $screen, string $ref): bool
     $bridge->assertNotCalled('ToastKit.Show');
 
     $screen->tap('view-issue')
-        ->assertNativeCalled('Browser.OpenInApp', fn (array $params): bool => $params['url'] === 'https://github.com/nunomaduro/dev-null.sh/issues/123');
+        ->assertNativeCalled('Browser.OpenInApp', fn (array $params): bool => $params['url'] === 'https://github.com/dev-null-sh/dev-null.sh/issues/123');
 
     $screen->tap('issue-done');
     expect(nodeByRef($screen, 'sheet')['props']['visible'])->toBeFalse();
@@ -206,6 +212,37 @@ function hasRef(TestableComponent $screen, string $ref): bool
         ->and(hasRef($screen, 'sheet-commit'))->toBeTrue();
 });
 
+it('sends the app and device details the web sends about its browser, never the phone\'s name', function () {
+    config(['nativephp.version' => '1.4.0']);
+    Native::fakeBridge()->respondTo('Device.GetInfo', ['info' => json_encode([
+        'name' => "Ada's iPhone",
+        'model' => 'iPhone',
+        'operatingSystem' => 'iOS',
+        'osVersion' => '27.2',
+        'language' => 'en-GB',
+    ])]);
+    System::rememberAppearance('dark');
+
+    try {
+        issueSheetOnLog()->input('sheet-body', '/bug Broken.')->tap('sheet-open-issue');
+    } finally {
+        System::rememberAppearance('light');
+    }
+
+    Http::assertSent(fn (Request $request): bool => str_ends_with($request->url(), '/api/v1/'.Client::IssuesPath)
+        && $request['environment'] === ['browser' => 'devnull app 1.4.0', 'os' => 'iOS 27.2', 'language' => 'en-GB', 'color_scheme' => 'dark']
+        && ! str_contains($request->body(), 'Ada'));
+});
+
+it('leaves out the details the phone does not give, and cuts the rest to what devnull takes', function () {
+    config(['nativephp.version' => str_repeat('9', 120)]);
+
+    issueSheetOnLog()->input('sheet-body', '/bug Broken.')->tap('sheet-open-issue');
+
+    Http::assertSent(fn (Request $request): bool => str_ends_with($request->url(), '/api/v1/'.Client::IssuesPath)
+        && $request['environment'] === ['browser' => mb_substr('devnull app '.str_repeat('9', 120), 0, IssueEnvironment::MaxLength), 'color_scheme' => 'light']);
+});
+
 it('opens no issue link that is not a web page', function () {
     $screen = issueSheetOnLog([['number' => 123, 'url' => 'javascript:alert(1)'], 201])->input('sheet-body', '/bug Broken.')->tap('sheet-open-issue');
 
@@ -222,13 +259,13 @@ function hasRef(TestableComponent $screen, string $ref): bool
         ->assertNativeCalled('ToastKit.Show', fn (array $params): bool => $params['message'] === 'Opened issue #123.'
             && $params['variant'] === 'success'
             && $params['action'] === ['id' => 'view-issue', 'label' => 'View issue']
-            && $params['data'] === ['url' => 'https://github.com/nunomaduro/dev-null.sh/issues/123']);
+            && $params['data'] === ['url' => 'https://github.com/dev-null-sh/dev-null.sh/issues/123']);
 
     expect(app(Stash::class)->get($this->userId, 'commit')->body)->toBe('')
         ->and(nodeByRef($screen, 'sheet')['props']['visible'])->toBeFalse();
 
-    $screen->emitNative(ToastActionPressed::class, ['toastId' => 'toast-1', 'actionId' => 'view-issue', 'data' => ['url' => 'https://github.com/nunomaduro/dev-null.sh/issues/123']])
-        ->assertNativeCalled('Browser.OpenInApp', fn (array $params): bool => $params['url'] === 'https://github.com/nunomaduro/dev-null.sh/issues/123');
+    $screen->emitNative(ToastActionPressed::class, ['toastId' => 'toast-1', 'actionId' => 'view-issue', 'data' => ['url' => 'https://github.com/dev-null-sh/dev-null.sh/issues/123']])
+        ->assertNativeCalled('Browser.OpenInApp', fn (array $params): bool => $params['url'] === 'https://github.com/dev-null-sh/dev-null.sh/issues/123');
 });
 
 it('keeps the issue draft with why when devnull or GitHub says no', function (array $answer, string $message) {