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/revocation.test.ts

@@ -0,0 +1,69 @@
+import { describe, expect, it } from 'vitest'
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { GOAWAY_REASON_TO_CODE } from 'relay-contracts'
+import {
+  applyGoAway,
+  applyGoAwayCode,
+  classifyGoAway,
+  createRevocationState,
+} from '../src/lifecycle/revocation.js'
+
+describe('classifyGoAway (T14, frozen 3-value union)', () => {
+  it('maps operatorDrain and shutdown → drain, revoked → revoked', () => {
+    expect(classifyGoAway('operatorDrain')).toBe('drain')
+    expect(classifyGoAway('shutdown')).toBe('drain')
+    expect(classifyGoAway('revoked')).toBe('revoked')
+  })
+})
+
+describe('createRevocationState (T14, INV12)', () => {
+  it('revoke tears down once and makes isRevoked() true (suppresses reconnect)', () => {
+    let teardowns = 0
+    const state = createRevocationState(() => {
+      teardowns += 1
+    })
+    expect(state.isRevoked()).toBe(false)
+    state.markRevoked('goaway-revoked')
+    expect(state.isRevoked()).toBe(true)
+    state.markRevoked('operator') // idempotent
+    expect(teardowns).toBe(1)
+  })
+})
+
+describe('applyGoAway / applyGoAwayCode (T14)', () => {
+  it('a revoked GOAWAY tears down; a drain GOAWAY does not', () => {
+    const revokeState = createRevocationState(() => {})
+    expect(applyGoAway('revoked', revokeState)).toBe('revoked')
+    expect(revokeState.isRevoked()).toBe(true)
+
+    const drainState = createRevocationState(() => {})
+    expect(applyGoAway('operatorDrain', drainState)).toBe('drain')
+    expect(applyGoAway('shutdown', drainState)).toBe('drain')
+    expect(drainState.isRevoked()).toBe(false)
+  })
+
+  it('decodes the frozen wire codes via decodeGoAwayReason', () => {
+    const state = createRevocationState(() => {})
+    expect(applyGoAwayCode(GOAWAY_REASON_TO_CODE.operatorDrain, state)).toBe('drain')
+    expect(applyGoAwayCode(GOAWAY_REASON_TO_CODE.revoked, state)).toBe('revoked')
+  })
+
+  it('an unknown reason code FAILS CLOSED to revoked (INV12 safety)', () => {
+    const state = createRevocationState(() => {})
+    expect(applyGoAwayCode(99, state)).toBe('revoked')
+    expect(state.isRevoked()).toBe(true)
+  })
+
+  it('cross-plan-drift guard: no bare integer reason literal in revocation.ts', () => {
+    const src = readFileSync(
+      join(import.meta.dirname, '..', 'src', 'lifecycle', 'revocation.ts'),
+      'utf8',
+    )
+    // The reason mapping must come only from the frozen union/decoder — never a hardcoded
+    // `=== 2` / `reason: 2` style integer. (Comments are allowed to mention numbers.)
+    const code = src.replace(/\/\*[\s\S]*?\*\//g, '').replace(/\/\/.*$/gm, '')
+    expect(code).not.toMatch(/reason\s*[=:]\s*\d/)
+    expect(code).not.toMatch(/===\s*[123]\b/)
+  })
+})