diff --git a/ui/src/pages/AppsTab/AppDeploymentPage/AppDeploymentPage.module.css b/ui/src/pages/AppsTab/AppDeploymentPage/AppDeploymentPage.module.css
index c8d8cef7..f7869b64 100644
--- a/ui/src/pages/AppsTab/AppDeploymentPage/AppDeploymentPage.module.css
+++ b/ui/src/pages/AppsTab/AppDeploymentPage/AppDeploymentPage.module.css
@@ -5,3 +5,51 @@
   padding: 16px 24px;
   min-height: 100%;
 }
+
+.section {
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 16px;
+  background: var(--bg-surface);
+}
+
+.configGrid {
+  display: grid;
+  grid-template-columns: 180px 1fr;
+  gap: 10px 16px;
+  align-items: center;
+  margin-top: 8px;
+}
+
+.configLabel {
+  color: var(--text-muted);
+  font-size: 13px;
+}
+
+.readOnlyValue {
+  color: var(--text-primary);
+  font-size: 14px;
+}
+
+.fileRow {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+}
+
+.stagedJar {
+  color: var(--amber);
+  font-size: 13px;
+}
+
+.visuallyHidden {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
diff --git a/ui/src/pages/AppsTab/AppDeploymentPage/IdentitySection.tsx b/ui/src/pages/AppsTab/AppDeploymentPage/IdentitySection.tsx
new file mode 100644
index 00000000..d4567634
--- /dev/null
+++ b/ui/src/pages/AppsTab/AppDeploymentPage/IdentitySection.tsx
@@ -0,0 +1,107 @@
+import { useRef } from 'react';
+import { SectionHeader, Input, MonoText, Button, Badge } from '@cameleer/design-system';
+import type { App, AppVersion } from '../../../api/queries/admin/apps';
+import type { Environment } from '../../../api/queries/admin/environments';
+import styles from './AppDeploymentPage.module.css';
+
+function slugify(name: string): string {
+  return name.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-+|-+$/g, '').substring(0, 100);
+}
+
+function formatBytes(bytes: number): string {
+  if (bytes >= 1_048_576) return `${(bytes / 1_048_576).toFixed(1)} MB`;
+  if (bytes >= 1024) return `${(bytes / 1024).toFixed(1)} KB`;
+  return `${bytes} B`;
+}
+
+interface IdentitySectionProps {
+  mode: 'net-new' | 'deployed';
+  environment: Environment;
+  app: App | null;
+  currentVersion: AppVersion | null;
+  name: string;
+  onNameChange: (next: string) => void;
+  stagedJar: File | null;
+  onStagedJarChange: (file: File | null) => void;
+  deploying: boolean;
+}
+
+export function IdentitySection({
+  mode, environment, app, currentVersion,
+  name, onNameChange, stagedJar, onStagedJarChange, deploying,
+}: IdentitySectionProps) {
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  const slug = app?.slug ?? slugify(name);
+
+  const externalUrl = (() => {
+    const defaults = environment.defaultContainerConfig ?? {};
+    const domain = String(defaults.routingDomain ?? '');
+    if (defaults.routingMode === 'subdomain' && domain) {
+      return `https://${slug || '...'}-${environment.slug}.${domain}/`;
+    }
+    const base = domain ? `https://${domain}` : window.location.origin;
+    return `${base}/${environment.slug}/${slug || '...'}/`;
+  })();
+
+  return (
+    <div className={styles.section}>
+      <SectionHeader>Identity & Artifact</SectionHeader>
+      <div className={styles.configGrid}>
+        <span className={styles.configLabel}>Application Name</span>
+        {mode === 'deployed' ? (
+          <span className={styles.readOnlyValue}>{name}</span>
+        ) : (
+          <Input
+            value={name}
+            onChange={(e) => onNameChange(e.target.value)}
+            placeholder="e.g. Payment Gateway"
+            disabled={deploying}
+          />
+        )}
+
+        <span className={styles.configLabel}>Slug</span>
+        <MonoText size="sm">{slug || '...'}</MonoText>
+
+        <span className={styles.configLabel}>Environment</span>
+        <Badge label={environment.displayName} color="auto" />
+
+        <span className={styles.configLabel}>External URL</span>
+        <MonoText size="sm">{externalUrl}</MonoText>
+
+        {currentVersion && (
+          <>
+            <span className={styles.configLabel}>Current Version</span>
+            <span className={styles.readOnlyValue}>
+              v{currentVersion.version} · {currentVersion.jarFilename} · {formatBytes(currentVersion.jarSizeBytes)}
+            </span>
+          </>
+        )}
+
+        <span className={styles.configLabel}>Application JAR</span>
+        <div className={styles.fileRow}>
+          <input
+            ref={fileInputRef}
+            type="file"
+            accept=".jar"
+            className={styles.visuallyHidden}
+            onChange={(e) => onStagedJarChange(e.target.files?.[0] ?? null)}
+          />
+          <Button
+            size="sm"
+            variant="secondary"
+            type="button"
+            onClick={() => fileInputRef.current?.click()}
+            disabled={deploying}
+          >
+            {currentVersion ? 'Change JAR' : 'Select JAR'}
+          </Button>
+          {stagedJar && (
+            <span className={styles.stagedJar}>
+              staged: {stagedJar.name} ({formatBytes(stagedJar.size)})
+            </span>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/ui/src/pages/AppsTab/AppDeploymentPage/index.tsx b/ui/src/pages/AppsTab/AppDeploymentPage/index.tsx
index c0a73228..03bbb91b 100644
--- a/ui/src/pages/AppsTab/AppDeploymentPage/index.tsx
+++ b/ui/src/pages/AppsTab/AppDeploymentPage/index.tsx
@@ -1,8 +1,11 @@
+import { useState, useEffect, useRef } from 'react';
 import { useParams, useLocation } from 'react-router';
 import { useEnvironmentStore } from '../../../api/environment-store';
 import { useEnvironments } from '../../../api/queries/admin/environments';
-import { useApps } from '../../../api/queries/admin/apps';
+import { useApps, useAppVersions } from '../../../api/queries/admin/apps';
 import { PageLoader } from '../../../components/PageLoader';
+import { IdentitySection } from './IdentitySection';
+import { deriveAppName } from './utils/deriveAppName';
 import styles from './AppDeploymentPage.module.css';
 
 export default function AppDeploymentPage() {
@@ -15,12 +18,49 @@ export default function AppDeploymentPage() {
   const isNetNew = location.pathname.endsWith('/apps/new');
   const app = isNetNew ? null : apps.find((a) => a.slug === appId) ?? null;
 
+  const env = environments.find((e) => e.slug === selectedEnv);
+  const { data: versions = [] } = useAppVersions(selectedEnv, app?.slug);
+  const currentVersion = versions.slice().sort((a, b) => b.version - a.version)[0] ?? null;
+
+  // Form state
+  const [name, setName] = useState('');
+  const [stagedJar, setStagedJar] = useState<File | null>(null);
+  const lastDerivedRef = useRef<string>('');
+
+  // Initialize name when app loads
+  useEffect(() => {
+    if (app) setName(app.displayName);
+  }, [app]);
+
+  // Auto-derive from staged JAR (net-new mode only, don't overwrite manual edits)
+  useEffect(() => {
+    if (!stagedJar || app) return;
+    const derived = deriveAppName(stagedJar.name);
+    if (!name || name === lastDerivedRef.current) {
+      setName(derived);
+      lastDerivedRef.current = derived;
+    }
+  }, [stagedJar, app, name]);
+
   if (envLoading || appsLoading) return <PageLoader />;
+  if (!env) return <div>Select an environment first.</div>;
+
+  const mode: 'net-new' | 'deployed' = app ? 'deployed' : 'net-new';
 
   return (
     <div className={styles.container}>
       <h2>{app ? app.displayName : 'Create Application'}</h2>
-      {/* Identity section, tabs, primary button land in subsequent tasks */}
+      <IdentitySection
+        mode={mode}
+        environment={env}
+        app={app}
+        currentVersion={currentVersion}
+        name={name}
+        onNameChange={setName}
+        stagedJar={stagedJar}
+        onStagedJarChange={setStagedJar}
+        deploying={false}
+      />
     </div>
   );
 }