feat(ios): ship gstack-ios-qa-daemon + gstack-ios-qa-mint launchers

The skill doc has been telling users to run `gstack-ios-qa-daemon` and
`gstack-ios-qa-mint` since v1.41.0.0, but neither binary actually existed.
Anyone following the install flow hit "command not found" immediately
after the Swift template install.

Adds the missing pieces:

- bin/gstack-ios-qa-daemon — bash shim that execs
  `bun run ios-qa/daemon/src/index.ts`. Loopback by default;
  `--tailnet` to additionally open the Tailscale-facing listener with
  capability-tier allowlist enforcement.
- bin/gstack-ios-qa-mint — owner-grant CLI for the tailnet allowlist
  (grant / revoke / list). Writes ~/.gstack/ios-qa-allowlist.json at
  mode 0600. Self-service POST /auth/mint reads from this file; remote
  agents never auto-allowlist.
- ios-qa/daemon/src/cli-mint.ts — TS implementation behind the shim.
  Handles --capability tier validation, --ttl expiry, --note metadata,
  and --allowlist-path override for tests.
- ios-qa/daemon/src/allowlist.ts — treat empty files as "no entries
  yet" (caught while writing the CLI tests; previously bombed with a
  JSON parse error on the first grant against a freshly-mktemp'd path).

Tests: 7 new end-to-end launcher tests (--help shape, grant/list/revoke
roundtrip, missing --remote, unknown capability, --ttl persistence,
launcher executability, missing-bun preflight). All 81 daemon tests
pass.

This is the last gap between "templates installed" and "I can drive
any connected iPhone over USB or tailnet" — the user-facing CLI surface
now matches the install instructions byte-for-byte.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

bin/gstack-ios-qa-daemon

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# gstack-ios-qa-daemon — Mac-side daemon that brokers tailnet/loopback traffic
+# to a connected iPhone running the in-app StateServer over the CoreDevice USB
+# tunnel. Single-instance via flock on ~/.gstack/ios-qa-daemon.pid.
+#
+# Usage:
+#   gstack-ios-qa-daemon                         # loopback-only (local USB)
+#   gstack-ios-qa-daemon --tailnet               # additionally open tailnet listener
+#
+# Environment:
+#   GSTACK_IOS_DAEMON_PORT       — loopback listener port (default 9099)
+#   GSTACK_IOS_TARGET_UDID       — target iOS device UDID (optional; otherwise
+#                                  the first paired connected device is used)
+#   GSTACK_IOS_TARGET_BUNDLE_ID  — bundle ID of the iOS app hosting StateServer
+#                                  (default com.gstack.iosqa.fixture)
+#
+# Readiness protocol: prints `READY: port=<n> pid=<pid>` to stdout once both
+# listeners are bound. Spawners read stdin with a ~5s timeout to confirm.
+#
+# Exits cleanly when no active loopback clients are connected AND no remote
+# session tokens are outstanding.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+GSTACK_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+ENTRY="$GSTACK_DIR/ios-qa/daemon/src/index.ts"
+
+if [ ! -f "$ENTRY" ]; then
+  echo "gstack-ios-qa-daemon: missing $ENTRY (gstack install incomplete?)" >&2
+  exit 1
+fi
+
+if ! command -v bun >/dev/null 2>&1; then
+  echo "gstack-ios-qa-daemon: bun runtime not on PATH — install from https://bun.sh" >&2
+  exit 1
+fi
+
+exec bun run "$ENTRY" "$@"

bin/gstack-ios-qa-mint

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# gstack-ios-qa-mint — manage the tailnet allowlist for remote iOS QA agents.
+#
+# This is the owner-grant path: it writes identities into the local allowlist
+# so a remote agent on the tailnet can self-service mint a session token via
+# POST /auth/mint against the daemon.
+#
+# Run `gstack-ios-qa-mint --help` for full usage.
+#
+# Allowlist file: ~/.gstack/ios-qa-allowlist.json (mode 0600).
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+GSTACK_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+ENTRY="$GSTACK_DIR/ios-qa/daemon/src/cli-mint.ts"
+
+if [ ! -f "$ENTRY" ]; then
+  echo "gstack-ios-qa-mint: missing $ENTRY (gstack install incomplete?)" >&2
+  exit 1
+fi
+
+if ! command -v bun >/dev/null 2>&1; then
+  echo "gstack-ios-qa-mint: bun runtime not on PATH — install from https://bun.sh" >&2
+  exit 1
+fi
+
+exec bun run "$ENTRY" "$@"

ios-qa/daemon/src/allowlist.ts

@@ -17,13 +17,9 @@ export function defaultAllowlistPath(): string {
 }
 
 export async function loadAllowlist(path: string = defaultAllowlistPath()): Promise<Allowlist> {
+  let raw: string;
   try {
-    const raw = await readFile(path, 'utf-8');
+    raw = await readFile(path, 'utf-8');
-    const parsed = JSON.parse(raw) as Allowlist;
-    if (parsed.version !== 1 || !Array.isArray(parsed.entries)) {
-      throw new Error('invalid_allowlist');
-    }
-    return parsed;
   } catch (err: unknown) {
     const e = err as { code?: string };
     if (e.code === 'ENOENT') {
@@ -31,6 +27,17 @@ export async function loadAllowlist(path: string = defaultAllowlistPath()): Prom
     }
     throw err;
   }
+  // Empty-file path (mktemp default, partial write, manual `: > file`): treat
+  // as "no entries yet" rather than a parse error. The first grant will fill
+  // it in atomically via saveAllowlist.
+  if (raw.trim() === '') {
+    return { version: 1, entries: [] };
+  }
+  const parsed = JSON.parse(raw) as Allowlist;
+  if (parsed.version !== 1 || !Array.isArray(parsed.entries)) {
+    throw new Error('invalid_allowlist');
+  }
+  return parsed;
 }
 
 export async function saveAllowlist(allowlist: Allowlist, path: string = defaultAllowlistPath()): Promise<void> {

ios-qa/daemon/src/cli-mint.ts

@@ -0,0 +1,149 @@
+// Owner-grant CLI. Adds (or upgrades) an identity to the allowlist so a
+// remote agent on the tailnet can self-service mint a session token via
+// POST /auth/mint. Never auto-allowlists; explicit user intent only.
+//
+// Invoked from bin/gstack-ios-qa-mint.
+
+import { grantIdentity, revokeIdentity, loadAllowlist, defaultAllowlistPath } from './allowlist';
+import type { Capability } from './types';
+
+const CAPABILITIES: Capability[] = ['observe', 'interact', 'mutate', 'restore'];
+
+interface ParsedArgs {
+  command: 'grant' | 'revoke' | 'list' | 'help';
+  identity: string | null;
+  capability: Capability;
+  ttlSeconds: number | null;
+  note: string | null;
+  path: string;
+}
+
+function parseArgs(argv: string[]): ParsedArgs {
+  // Default: help. Recognized positional commands: grant | revoke | list.
+  let command: ParsedArgs['command'] = 'help';
+  let identity: string | null = null;
+  let capability: Capability = 'interact';
+  let ttlSeconds: number | null = null;
+  let note: string | null = null;
+  let path = defaultAllowlistPath();
+
+  for (let i = 0; i < argv.length; i++) {
+    const a = argv[i];
+    switch (a) {
+      case 'grant': command = 'grant'; break;
+      case 'revoke': command = 'revoke'; break;
+      case 'list': command = 'list'; break;
+      case '--help':
+      case '-h': command = 'help'; break;
+      case '--remote':
+      case '--identity':
+        identity = argv[++i] ?? null;
+        break;
+      case '--capability':
+      case '--cap': {
+        const v = argv[++i];
+        if (!CAPABILITIES.includes(v as Capability)) {
+          process.stderr.write(`unknown capability: ${v} (want one of ${CAPABILITIES.join(', ')})\n`);
+          process.exit(2);
+        }
+        capability = v as Capability;
+        break;
+      }
+      case '--ttl': {
+        const v = parseInt(argv[++i] ?? '', 10);
+        if (!Number.isFinite(v) || v <= 0) {
+          process.stderr.write('--ttl must be a positive integer (seconds)\n');
+          process.exit(2);
+        }
+        ttlSeconds = v;
+        break;
+      }
+      case '--note': note = argv[++i] ?? null; break;
+      case '--allowlist-path': path = argv[++i] ?? path; break;
+    }
+  }
+  return { command, identity, capability, ttlSeconds, note, path };
+}
+
+function printHelp() {
+  const help = `gstack-ios-qa-mint — manage the tailnet allowlist for remote iOS QA agents
+
+USAGE
+  gstack-ios-qa-mint grant  --remote <identity> [--capability <tier>] [--ttl <seconds>] [--note <text>]
+  gstack-ios-qa-mint revoke --remote <identity>
+  gstack-ios-qa-mint list
+
+ARGUMENTS
+  --remote <identity>     Canonical tailnet identity (e.g. user@example.com or tag:ci).
+  --capability <tier>     observe | interact (default) | mutate | restore
+  --ttl <seconds>         Optional expiry. Omit for no-expiry entry.
+  --note <text>           Free-form note kept alongside the entry.
+  --allowlist-path <path> Override the allowlist file location.
+
+EXAMPLES
+  gstack-ios-qa-mint grant --remote 'alice@example.com' --capability interact
+  gstack-ios-qa-mint grant --remote 'tag:ci' --capability mutate --ttl 86400 --note 'nightly run'
+  gstack-ios-qa-mint revoke --remote 'alice@example.com'
+  gstack-ios-qa-mint list
+
+The allowlist lives at ~/.gstack/ios-qa-allowlist.json (mode 0600). The daemon's
+self-service /auth/mint endpoint reads this file on every request.
+`;
+  process.stdout.write(help);
+}
+
+async function main(): Promise<void> {
+  const args = parseArgs(process.argv.slice(2));
+
+  if (args.command === 'help') {
+    printHelp();
+    return;
+  }
+
+  if (args.command === 'list') {
+    const allowlist = await loadAllowlist(args.path);
+    if (allowlist.entries.length === 0) {
+      process.stdout.write('(empty allowlist)\n');
+      return;
+    }
+    for (const e of allowlist.entries) {
+      const caps = e.capabilities.join(',');
+      const exp = e.expires_at ? ` expires=${e.expires_at}` : '';
+      const note = e.note ? ` note="${e.note}"` : '';
+      process.stdout.write(`${e.identity}  cap=${caps}${exp}${note}\n`);
+    }
+    return;
+  }
+
+  if (!args.identity) {
+    process.stderr.write('error: --remote <identity> required\n');
+    process.exit(2);
+  }
+
+  if (args.command === 'grant') {
+    const result = await grantIdentity({
+      identity: args.identity,
+      capability: args.capability,
+      ttlSeconds: args.ttlSeconds,
+      note: args.note ?? undefined,
+      path: args.path,
+    });
+    const entry = result.entries.find(e => e.identity === args.identity);
+    process.stdout.write(`granted ${args.identity} capability=${args.capability}` +
+      (entry?.expires_at ? ` expires=${entry.expires_at}` : '') + '\n');
+    return;
+  }
+
+  if (args.command === 'revoke') {
+    await revokeIdentity(args.identity, args.path);
+    process.stdout.write(`revoked ${args.identity}\n`);
+    return;
+  }
+}
+
+if (import.meta.main) {
+  main().catch((err) => {
+    process.stderr.write(`gstack-ios-qa-mint: ${(err as Error).message}\n`);
+    process.exit(1);
+  });
+}

ios-qa/daemon/test/cli-mint.test.ts

@@ -0,0 +1,119 @@
+// CLI tests for gstack-ios-qa-mint. Invokes the bash launcher end-to-end
+// so we catch any breakage between bin/, the entry-point resolution, and
+// the underlying allowlist primitives. Runs against a temp allowlist path
+// so the user's real ~/.gstack/ios-qa-allowlist.json is untouched.
+
+import { describe, test, expect, beforeEach } from 'bun:test';
+import { mkdtempSync, rmSync, readFileSync, statSync, existsSync, chmodSync } from 'fs';
+import { tmpdir } from 'os';
+import { join } from 'path';
+import { spawnSync } from 'child_process';
+
+const ROOT = join(import.meta.dir, '..', '..', '..');
+const MINT_BIN = join(ROOT, 'bin', 'gstack-ios-qa-mint');
+const DAEMON_BIN = join(ROOT, 'bin', 'gstack-ios-qa-daemon');
+
+function runMint(args: string[]) {
+  return spawnSync(MINT_BIN, args, { stdio: 'pipe', encoding: 'utf-8' });
+}
+
+describe('bin/gstack-ios-qa-mint launcher', () => {
+  let tmpDir: string;
+  let listPath: string;
+
+  beforeEach(() => {
+    tmpDir = mkdtempSync(join(tmpdir(), 'ios-qa-cli-mint-'));
+    listPath = join(tmpDir, 'allowlist.json');
+  });
+
+  test('--help prints usage without touching allowlist', () => {
+    const r = runMint(['--help']);
+    expect(r.status).toBe(0);
+    expect(r.stdout).toContain('gstack-ios-qa-mint');
+    expect(r.stdout).toContain('grant');
+    expect(r.stdout).toContain('revoke');
+    expect(r.stdout).toContain('list');
+  });
+
+  test('grant + list + revoke roundtrip', () => {
+    const grant = runMint([
+      'grant', '--remote', 'alice@example.com',
+      '--capability', 'interact',
+      '--allowlist-path', listPath,
+    ]);
+    expect(grant.status).toBe(0);
+    expect(grant.stdout).toContain('granted alice@example.com');
+
+    // File must exist and be mode 0600 (owner-only). Mint creates the
+    // parent directory with 0700 + writes the file at 0600.
+    expect(existsSync(listPath)).toBe(true);
+    const mode = statSync(listPath).mode & 0o777;
+    expect(mode).toBe(0o600);
+
+    const list = runMint(['list', '--allowlist-path', listPath]);
+    expect(list.status).toBe(0);
+    expect(list.stdout).toContain('alice@example.com');
+    expect(list.stdout).toContain('cap=interact');
+
+    const revoke = runMint(['revoke', '--remote', 'alice@example.com', '--allowlist-path', listPath]);
+    expect(revoke.status).toBe(0);
+
+    const listAfter = runMint(['list', '--allowlist-path', listPath]);
+    expect(listAfter.status).toBe(0);
+    expect(listAfter.stdout).toContain('(empty allowlist)');
+  });
+
+  test('grant without --remote exits non-zero with clear error', () => {
+    const r = runMint(['grant', '--capability', 'interact', '--allowlist-path', listPath]);
+    expect(r.status).not.toBe(0);
+    expect(r.stderr).toContain('--remote');
+  });
+
+  test('rejects unknown capability', () => {
+    const r = runMint([
+      'grant', '--remote', 'alice@example.com',
+      '--capability', 'godmode',
+      '--allowlist-path', listPath,
+    ]);
+    expect(r.status).not.toBe(0);
+    expect(r.stderr).toContain('unknown capability');
+  });
+
+  test('grant with --ttl persists expires_at', () => {
+    const r = runMint([
+      'grant', '--remote', 'tag:ci',
+      '--capability', 'mutate',
+      '--ttl', '3600',
+      '--note', 'nightly',
+      '--allowlist-path', listPath,
+    ]);
+    expect(r.status).toBe(0);
+    const raw = readFileSync(listPath, 'utf-8');
+    const parsed = JSON.parse(raw);
+    expect(parsed.entries[0].identity).toBe('tag:ci');
+    expect(parsed.entries[0].capabilities).toEqual(['mutate']);
+    expect(parsed.entries[0].expires_at).toBeTruthy();
+    expect(parsed.entries[0].note).toBe('nightly');
+  });
+});
+
+describe('bin/gstack-ios-qa-daemon launcher', () => {
+  test('launcher is executable', () => {
+    expect(existsSync(DAEMON_BIN)).toBe(true);
+    const mode = statSync(DAEMON_BIN).mode & 0o111;
+    expect(mode).not.toBe(0);
+  });
+
+  test('reports missing bun runtime cleanly', () => {
+    // Simulate `bun` missing by giving PATH only /usr/bin + /bin (so bash
+    // resolves but `command -v bun` does not). The launcher's preflight
+    // check should fire BEFORE attempting to exec bun.
+    const r = spawnSync(DAEMON_BIN, [], {
+      stdio: 'pipe',
+      encoding: 'utf-8',
+      env: { PATH: '/usr/bin:/bin' },
+    });
+    expect(r.status).not.toBe(0);
+    expect(r.stderr).toContain('bun');
+  });
+});