diff --git a/src/codex-auth/commands/show-detail-view.ts b/src/codex-auth/commands/show-detail-view.ts
index 077af14a..9ae5114f 100644
--- a/src/codex-auth/commands/show-detail-view.ts
+++ b/src/codex-auth/commands/show-detail-view.ts
@@ -69,6 +69,8 @@ export function showProfileDetail(
   if (isActive) states.push('active');
   const stateStr = states.join(',');
   const accountId = meta.account_id ?? identity.account_id ?? null;
+  const email = meta.email ?? identity.email ?? null;
+  const plan = meta.plan_type ?? identity.plan_type ?? null;
 
   if (json) {
     const out: CodexProfileOutput = {
@@ -77,8 +79,8 @@ export function showProfileDetail(
       is_active: isActive,
       created: meta.created,
       last_used: meta.last_used ?? null,
-      email: identity.email ?? null,
-      plan: meta.plan_type ?? null,
+      email,
+      plan,
       account_id: accountId,
       profile_dir: profileDir,
       auth_json_exists: authExists,
@@ -98,8 +100,8 @@ export function showProfileDetail(
     ['Profile dir', profileDir],
     ['config.toml', configTarget ? `-> ${configTarget}  (symlink)` : '(not linked)'],
     ['auth.json', authState],
-    ['Email', identity.email ?? (authExists ? '<invalid>' : '<unknown>')],
-    ['Plan', meta.plan_type ?? (authExists ? '<invalid>' : '<unknown>')],
+    ['Email', email ?? (authExists ? '<invalid>' : '<unknown>')],
+    ['Plan', plan ?? (authExists ? '<invalid>' : '<unknown>')],
     ['Account ID', accountId ?? '-'],
     ['Created', new Date(meta.created).toLocaleString()],
     ['Last used', meta.last_used ? new Date(meta.last_used).toLocaleString() : 'never'],
diff --git a/src/codex-auth/commands/types.ts b/src/codex-auth/commands/types.ts
index 04eb5829..523ba2fe 100644
--- a/src/codex-auth/commands/types.ts
+++ b/src/codex-auth/commands/types.ts
@@ -28,6 +28,7 @@ export interface CodexAuthArgs {
   shell?: string;
   unknownFlags?: string[];
   seenOptions?: string[];
+  extraPositionals?: string[];
 }
 
 // ── Profile output shape (JSON mode) ─────────────────────────────────────────
@@ -86,6 +87,9 @@ export function parseArgs(args: string[]): CodexAuthArgs {
   if (positional.length > 0) {
     result.profileName = positional[0];
   }
+  if (positional.length > 1) {
+    result.extraPositionals = positional.slice(1);
+  }
 
   return result;
 }
@@ -108,10 +112,17 @@ export function rejectUnsupportedOptions(
   if (seen.has('--json') && !allowed.json) unsupported.add('--json');
   if (seen.has('--force') && !allowed.force) unsupported.add('--force');
   if (seen.has('--shell') && !allowed.shell) unsupported.add('--shell');
+  const extraPositionals = parsed.extraPositionals ?? [];
 
-  if (unsupported.size > 0) {
+  if (unsupported.size > 0 || extraPositionals.length > 0) {
     const flags = [...unsupported].join(', ');
     process.stderr.write(`Usage: ${color(usage, 'command')}\n`);
-    exitWithError(`Unknown options: ${flags}`, ExitCode.GENERAL_ERROR);
+    const details = [
+      flags ? `Unknown options: ${flags}` : null,
+      extraPositionals.length > 0
+        ? `Unexpected arguments: ${extraPositionals.map((arg) => `"${arg}"`).join(', ')}`
+        : null,
+    ].filter(Boolean);
+    exitWithError(details.join('; '), ExitCode.GENERAL_ERROR);
   }
 }
diff --git a/tests/unit/codex-auth/commands/remove-command.test.ts b/tests/unit/codex-auth/commands/remove-command.test.ts
index e52f753a..f612686d 100644
--- a/tests/unit/codex-auth/commands/remove-command.test.ts
+++ b/tests/unit/codex-auth/commands/remove-command.test.ts
@@ -146,6 +146,42 @@ describe('handleRemoveCodex — only profile', () => {
 // ── confirmation prompt ───────────────────────────────────────────────────────
 
 describe('handleRemoveCodex — confirmation', () => {
+  it('rejects extra positional arguments before deleting anything', async () => {
+    const { handleRemoveCodex } = await import(
+      '../../../../src/codex-auth/commands/remove-command'
+    );
+    const ctx = await makeCtx('work');
+
+    let exitCode = -1;
+    const err: string[] = [];
+    const origExit = process.exit;
+    const origError = console.error;
+    const origWrite = process.stderr.write.bind(process.stderr);
+    process.exit = (code?: number) => {
+      exitCode = code ?? 0;
+      throw new Error('exit');
+    };
+    console.error = (...a: unknown[]) => err.push(a.join(' '));
+    process.stderr.write = (chunk: string | Uint8Array) => {
+      err.push(String(chunk));
+      return true;
+    };
+
+    try {
+      await handleRemoveCodex(ctx, ['work', 'accidental', '--yes']);
+    } catch {
+      /* process.exit */
+    } finally {
+      process.exit = origExit;
+      console.error = origError;
+      process.stderr.write = origWrite;
+    }
+
+    expect(exitCode).toBeGreaterThan(0);
+    expect(ctx.registry.hasProfile('work')).toBe(true);
+    expect(err.join('')).toContain('Unexpected arguments: "accidental"');
+  });
+
   it('cancels when user declines confirmation', async () => {
     await mockConfirmNo();
     const { handleRemoveCodex } = await import(
diff --git a/tests/unit/codex-auth/commands/show-command.test.ts b/tests/unit/codex-auth/commands/show-command.test.ts
index bd557629..ac56b946 100644
--- a/tests/unit/codex-auth/commands/show-command.test.ts
+++ b/tests/unit/codex-auth/commands/show-command.test.ts
@@ -168,17 +168,58 @@ describe('handleShowCodex — detail view', () => {
     expect(out).toContain('<unknown>');
   });
 
-  it('detail JSON includes account_id from registry metadata when auth.json is missing', async () => {
+  it('detail JSON includes cached registry identity when auth.json is missing', async () => {
     const { handleShowCodex } = await import('../../../../src/codex-auth/commands/show-command');
     const ctx = await makeCtx('registrydetail');
     ctx.registry.updateProfile('registrydetail', {
       account_id: 'acct-from-registry-detail',
+      email: 'detail@example.com',
+      plan_type: 'team',
     });
 
     const out = await captureStdout(() => handleShowCodex(ctx, ['registrydetail', '--json']));
-    const parsed = JSON.parse(out) as { account_id: string | null };
+    const parsed = JSON.parse(out) as {
+      account_id: string | null;
+      email: string | null;
+      plan: string | null;
+    };
 
     expect(parsed.account_id).toBe('acct-from-registry-detail');
+    expect(parsed.email).toBe('detail@example.com');
+    expect(parsed.plan).toBe('team');
+  });
+
+  it('rejects extra positional arguments instead of ignoring them', async () => {
+    const { handleShowCodex } = await import('../../../../src/codex-auth/commands/show-command');
+    const ctx = await makeCtx('myprofile');
+
+    let exitCode = -1;
+    const err: string[] = [];
+    const origExit = process.exit;
+    const origError = console.error;
+    const origWrite = process.stderr.write.bind(process.stderr);
+    process.exit = (code?: number) => {
+      exitCode = code ?? 0;
+      throw new Error('exit');
+    };
+    console.error = (...a: unknown[]) => err.push(a.join(' '));
+    process.stderr.write = (chunk: string | Uint8Array) => {
+      err.push(String(chunk));
+      return true;
+    };
+
+    try {
+      await handleShowCodex(ctx, ['myprofile', 'extra']);
+    } catch {
+      /* process.exit */
+    } finally {
+      process.exit = origExit;
+      console.error = origError;
+      process.stderr.write = origWrite;
+    }
+
+    expect(exitCode).toBeGreaterThan(0);
+    expect(err.join('')).toContain('Unexpected arguments: "extra"');
   });
 
   it('does not crash with malformed auth.json', async () => {