feat(relay): rendezvous-relay service — 7 packages + plans (contracts/transport/agent/control-plane/e2e/auth/web)

Multi-tenant reverse-tunnel service ("ngrok for Claude Code" with E2E): a
host-agent dials OUT to an operator-run relay; external devices reach the host
THROUGH the relay, routed by per-tenant subdomain, forwarding ciphertext only
(the relay never sees plaintext). Lets a customer reach their own self-hosted
web-terminal from anywhere with zero networking setup.

Packages — all tsc-strict + vitest green (656 tests), cross-package integration verified:
- relay-contracts: frozen shared contracts (mux frame codec, data model,
  capability token, E2E envelope, pairing) — the src/types.ts analog
- term-relay:   native WS mux + stateless data plane (subdomain routing, ciphertext forward)
- agent:        host-agent (pairing, per-host Ed25519 + mTLS dial-out, forwards to 127.0.0.1:3000)
- control-plane: accounts/hosts registry, pairing-code flow, routing table, provisioning
- relay-e2e:    browser<->agent E2E (X25519 ECDH through relay, AEAD, anti-replay, recoverable replay key)
- relay-auth:   Passkey/WebAuthn, capability tokens, per-host certs, deny-by-default tenant isolation
- relay-web:    browser login + Web Crypto E2E + client-side preview rendering

Security invariants INV1-15 enforced; cross-tenant isolation CI tripwire live
(.github/workflows/relay-tripwire.yml). Design + implementation-level plans in
docs/PLAN_RELAY_*.md and docs/EXPLORE_RELAY_SERVICE.md.

NOTE: generated autonomously per the reviewed plans. The security-critical
packages (relay-e2e, relay-auth) REQUIRE expert security audit before any real
deployment — passing tests prove self-consistency, not resistance to attackers.
Base app (src/, public/) unchanged; concurrent desktop work left uncommitted.

agent/test/cli.test.ts

@@ -0,0 +1,111 @@
+import { describe, expect, it, vi } from 'vitest'
+import type { AgentConfig } from '../src/config/agentConfig.js'
+import type { Keystore } from '../src/keys/keystore.js'
+import type { AgentIdentity } from '../src/keys/identity.js'
+import type { EnrollResult } from 'relay-contracts'
+import { CliUsageError, parseArgs, runCli, type CliDeps } from '../src/cli.js'
+
+const CFG: AgentConfig = {
+  relayUrl: 'wss://relay/agent',
+  enrollUrl: 'https://x/enroll',
+  stateDir: '/tmp/x',
+  localTargetUrl: 'ws://127.0.0.1:3000',
+  subdomain: 'host-42',
+  hostId: 'h-1',
+}
+
+function fakeIdentity(): AgentIdentity {
+  return {
+    publicKey: new Uint8Array(32),
+    enrollFpr: 'fpr',
+    sign: () => new Uint8Array(64),
+    exportPrivatePkcs8Pem: () => 'PEM',
+    privateKeyObject: () => ({}) as never,
+  }
+}
+
+function fakeKeystore(enrolled: boolean): Keystore {
+  return {
+    saveIdentity: vi.fn(),
+    loadIdentity: () => (enrolled ? fakeIdentity() : null),
+    saveCert: vi.fn(),
+    loadCert: () => (enrolled ? { certPem: 'C', caChainPem: 'CA' } : null),
+    saveContentSecret: vi.fn(),
+    loadContentSecret: () => null,
+  }
+}
+
+function deps(overrides: Partial<CliDeps> = {}, enrolled = false): { d: CliDeps; out: string[] } {
+  const out: string[] = []
+  const d: CliDeps = {
+    loadConfig: () => CFG,
+    openKeystore: () => fakeKeystore(enrolled),
+    generateIdentity: fakeIdentity,
+    redeem: async (): Promise<EnrollResult> => ({
+      hostId: 'h-1',
+      subdomain: 'host-42',
+      cert: 'C',
+      caChain: 'CA',
+      hostContentSecret: new Uint8Array([1]),
+    }),
+    runTunnel: async () => 0,
+    installService: vi.fn(async () => {}),
+    uninstallService: vi.fn(async () => {}),
+    print: (l) => out.push(l),
+    ...overrides,
+  }
+  return { d, out }
+}
+
+describe('parseArgs (T5)', () => {
+  it('parses `pair ABCD-1234`', () => {
+    expect(parseArgs(['pair', 'ABCD-1234'])).toEqual({ command: 'pair', code: 'ABCD-1234', flags: {} })
+  })
+
+  it('rejects an unknown command', () => {
+    expect(() => parseArgs(['frobnicate'])).toThrow(CliUsageError)
+  })
+
+  it('requires a code on pair', () => {
+    expect(() => parseArgs(['pair'])).toThrow(CliUsageError)
+  })
+
+  it('collects flags', () => {
+    expect(parseArgs(['pair', 'X', '--install'])).toEqual({
+      command: 'pair',
+      code: 'X',
+      flags: { install: true },
+    })
+  })
+})
+
+describe('runCli (T5)', () => {
+  it('pair happy path calls redeem and prints no secrets', async () => {
+    const { d, out } = deps()
+    const code = await runCli(parseArgs(['pair', 'ABCD']), d)
+    expect(code).toBe(0)
+    expect(out.join('\n')).toContain('host-42')
+    expect(out.join('\n')).not.toContain('PEM')
+  })
+
+  it('pair --install installs the service', async () => {
+    const install = vi.fn(async () => {})
+    const { d } = deps({ installService: install })
+    await runCli(parseArgs(['pair', 'ABCD', '--install']), d)
+    expect(install).toHaveBeenCalledOnce()
+  })
+
+  it('run before pairing fails fast', async () => {
+    const { d } = deps({}, false)
+    await expect(runCli({ command: 'run', flags: {} }, d)).rejects.toBeInstanceOf(CliUsageError)
+  })
+
+  it('status prints no key/cert material (INV9)', async () => {
+    const { d, out } = deps({}, true)
+    await runCli({ command: 'status', flags: {} }, d)
+    const joined = out.join('\n')
+    expect(joined).toContain('subdomain: host-42')
+    expect(joined).not.toContain('PEM')
+    expect(joined).not.toContain('CA')
+  })
+})