/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { isAbsolute } from 'node:path';
import {
  isProductReleaseVersion,
  isSha512PackageIntegrity,
} from '@maka/runtime-host/operator/update-package-evidence';
import {
  createRuntimeHostLegacyPosixOperatorCommand,
  decodeRuntimeHostPosixOperatorCommand,
  decodeRuntimeHostWebRtcStunPolicy,
  type RuntimeHostManagedUpdatePolicy,
  type RuntimeHostPosixOperatorCommand,
  type RuntimeHostWebRtcStunPolicy,
} from '@maka/runtime-host/operator';
import {
  canonicalProjectDirectoryRootSpec,
  isCanonicalRuntimeHostWebSocketPath,
  PROJECT_DIRECTORY_MAX_ROOTS,
  projectDirectoryPosixRootSpecValid,
  projectDirectoryRootSpecValid,
} from '@maka/runtime-host/protocol';
import type { RuntimeHostManagedServiceTarget } from './runtime-host-service-manager.js';
import { hasEphemeralRuntimeHostPeerPort } from './runtime-host-peer-artifact.js';
import type { RuntimeHostInstalledUpdateExpectedSource } from './runtime-host-installed-update-coordinator.js';
import {
  installedUpdateHelpText,
  isRuntimeHostHelpTopic,
  runtimeHostCommandHelpText,
  runtimeHostHelpText,
} from './runtime-host-help.js';

type RuntimeHostCliError = { kind: 'error'; message: string; exitCode: number };
type RuntimeHostCliHelp = { kind: 'help'; text: string };

export type RuntimeHostUpdateSelector =
  | { readonly kind: 'channel'; readonly channel: 'latest' | 'next' }
  | { readonly kind: 'exact'; readonly version: string };

export interface RuntimeHostExpectedHost {
  /** Freshness fence for admitting a canonical supervised-deployment mutation. */
  readonly hostEpoch: string;
  readonly pid: number;
}

export type RuntimeHostCliCommand =
  | {
      kind: 'runtime-host-managed-activate';
      rootId: string;
      framed: true;
      repairRootAfterRemount?: true;
    }
  | {
      kind: 'runtime-host-managed-connect';
      rootId: string;
      framed: true;
      repairRootAfterRemount?: true;
    }
  | {
      kind: 'runtime-host-installed-update';
      selector: RuntimeHostUpdateSelector;
      allowInterruptActiveTasks: boolean;
    }
  | {
      kind: 'runtime-host-local-update-apply';
      rootPath: string;
      archivePath: string;
      installedPackageRoot: string;
      installedCliPath: string;
      currentVersion: string;
      targetVersion: string;
      targetIntegrity: string;
      targetCompatibility?: number;
      allowInterruptActiveTasks: boolean;
      expectedSource?: RuntimeHostInstalledUpdateExpectedSource;
    }
  | {
      kind: 'runtime-host-local-update-activate';
      rootPath: string;
      expectedRootId: string;
      generation: string;
      candidateEntrypoint: string;
      takeoverHostEpoch?: string;
      awaitCoordinatorCommit: boolean;
      expectedOwnerInstallationId?: string;
      targetVersion?: string;
      targetIntegrity?: string;
    }
  | {
      kind: 'runtime-host-local-source-retire';
      rootPath: string;
      expectedRootId: string;
      expectedHostEpoch: string;
      allowInterruptActiveTasks: boolean;
    }
  | {
      kind: 'runtime-host-serve';
      rootPath?: string;
      managedServiceConfigPath?: string;
      managedDeployment?: {
        rootId: string;
        deploymentId: string;
        configRevision: number;
      };
      json: boolean;
      projectDirectoryRoots?: { label: string; path: string }[];
      websocket?: {
        host: string;
        port: number;
        path?: string;
        tlsCertificatePath?: string;
        tlsPrivateKeyPath?: string;
        allowedOrigins?: string[];
        allowInsecureRemote?: boolean;
      };
      peer?: {
        nativePath: string;
        keyPath: string;
        expectedPeerId?: string;
        listenAddresses?: string[];
        coordinationRelays?: string[];
        webRtcStunUrls?: string[];
      };
    }
  | {
      kind: 'runtime-host-setup';
      json: boolean;
      principalId: string;
      preset: 'desktop-client' | 'terminal-client';
      lifecycle: 'supervised' | 'on_demand';
      deferPairingCommit: boolean;
      bindPairingToClient?: true;
      repairRootAfterRemount?: true;
      updateExisting?: true;
      reuseExistingEnvironment?: true;
      allowInterruptActiveTasks?: true;
      clientDataRoot?: string;
      rootPath?: string;
      projectDirectoryRoots?: { label: string; path: string }[];
      websocketPort?: number;
      websocketPath?: string;
      directPeer?: {
        coordinationRelays: string[];
      };
      expectedTarget?: RuntimeHostManagedServiceTarget;
    }
  | {
      kind: 'runtime-host-service-manage';
      action:
        | 'install'
        | 'configure'
        | 'status'
        | 'start'
        | 'stop'
        | 'restart'
        | 'retire'
        | 'logs'
        | 'uninstall';
      json: boolean;
      framed?: true;
      clientDataRoot?: string;
      managedRootId?: string;
      operatorDeploymentId?: string;
      rootPath?: string;
      projectDirectoryRoots?: { label: string; path: string }[];
      websocketPort?: number;
      websocketPath?: string;
      expectedTarget?: RuntimeHostManagedServiceTarget;
      expectedConfigFingerprint?: string;
      expectedHost?: RuntimeHostExpectedHost;
      retainManagedDeployment?: true;
      allowInterruptActiveTasks?: true;
    }
  | {
      kind: 'runtime-host-service-peer';
      action: 'enable' | 'disable' | 'status' | 'rotate' | 'descriptor';
      json: boolean;
      framed?: true;
      clientDataRoot?: string;
      managedRootId: string;
      operatorDeploymentId: string;
      listenAddresses: string[];
      coordinationRelays?: string[];
      automaticRelayDiscovery?: boolean;
      relayDiscoveryStatus?: true;
      webRtcStunPolicy?: RuntimeHostWebRtcStunPolicy;
      webRtcStunStatus?: true;
      expectedTarget?: RuntimeHostManagedServiceTarget;
      allowInterruptActiveTasks?: true;
    }
  | {
      kind: 'runtime-host-service-peer-mesh';
      action:
        | 'status'
        | 'create'
        | 'invite'
        | 'join'
        | 'remove'
        | 'leave'
        | 'close'
        | 'reconcile'
        | 'transit'
        | 'rename'
        | 'rename-mesh';
      json: boolean;
      framed?: true;
      managedRootId: string;
      operatorDeploymentId: string;
      expectedTarget: RuntimeHostManagedServiceTarget;
      meshId?: string | null;
      peerId?: string;
      displayName?: string | null;
    }
  | {
      kind: 'runtime-host-service-check-update';
      json: boolean;
      framed?: true;
      clientDataRoot?: string;
      managedRootId?: string;
      operatorDeploymentId?: string;
      selector: RuntimeHostUpdateSelector;
      expectedTarget?: RuntimeHostManagedServiceTarget;
    }
  | {
      kind: 'runtime-host-service-update';
      json: boolean;
      framed?: true;
      clientDataRoot?: string;
      managedRootId?: string;
      operatorDeploymentId?: string;
      expectedTarget: RuntimeHostManagedServiceTarget;
      expectedHost?: RuntimeHostExpectedHost;
      expectedConfigFingerprint?: string;
      expectedSourceVersion?: string;
      selector?: RuntimeHostUpdateSelector;
      allowManualUpdate?: true;
      allowInterruptActiveTasks?: true;
    }
  | {
      kind: 'runtime-host-service-update-policy';
      json: boolean;
      framed?: true;
      clientDataRoot?: string;
      managedRootId?: string;
      operatorDeploymentId?: string;
      policy?: RuntimeHostManagedUpdatePolicy;
      expectedTarget?: RuntimeHostManagedServiceTarget;
    }
  | {
      kind: 'runtime-host-service-reconcile-update';
      json: boolean;
      framed?: true;
      clientDataRoot?: string;
      managedRootId?: string;
      operatorDeploymentId?: string;
      expectedTarget?: RuntimeHostManagedServiceTarget;
    }
  | {
      kind: 'runtime-host-managed-deployment-cleanup';
      clientDataRoot?: string;
      managedRootId?: string;
      operatorDeploymentId?: string;
      finalize?: true;
      expectedTarget: RuntimeHostManagedServiceTarget;
    }
  | {
      kind: 'runtime-host-access-issue';
      rootPath?: string;
      expectedRootId?: string;
      principalKind: 'remote_owner' | 'capability_provider';
      principalId: string;
      operationGrants: string[];
      canPublishClientCapabilities: boolean;
      canUseHostPaths: boolean;
      capabilityOwnerCredentialId?: string;
      preset?: 'desktop-client' | 'terminal-client';
    }
  | {
      kind: 'runtime-host-access-prepare';
      rootPath?: string;
      expectedRootId?: string;
      currentCredentialFingerprint: string;
    }
  | {
      kind: 'runtime-host-access-list';
      rootPath?: string;
      expectedRootId?: string;
      framed: boolean;
    }
  | {
      kind: 'runtime-host-access-connection-code';
      rootPath?: string;
      expectedRootId?: string;
      name?: string;
      framed: boolean;
    }
  | {
      kind: 'runtime-host-access-revoke';
      rootPath?: string;
      expectedRootId?: string;
      credentialId: string;
      currentCredentialFingerprint?: string;
      framed: boolean;
    }
  | { kind: 'runtime-host-project-list'; rootPath?: string }
  | {
      kind: 'runtime-host-project-add';
      rootPath?: string;
      path: string;
      prefer: boolean;
    }
  | {
      kind: 'runtime-host-plugin';
      rootPath?: string;
      action:
        | 'status'
        | 'list'
        | 'inspect'
        | 'failures'
        | 'install'
        | 'uninstall'
        | 'reload'
        | 'export'
        | 'apply'
        | 'reconcile';
      subject?: string;
      targetPath?: string;
      rootId?: string;
      cursor?: string;
      limit?: number;
    }
  | {
      kind: 'runtime-host-capability-provider-serve';
      url: string;
      mcpConfigPath: string;
      expectedRootId: string;
      credentialEnv?: string;
      clientIdentityPath?: string;
    }
  | { kind: 'runtime-host-profile-list' }
  | {
      kind: 'runtime-host-profile-set';
      id: string;
      name: string;
      transport:
        | { kind: 'tls'; url: string }
        | {
            kind: 'plaintext';
            url: string;
            acknowledgement: 'plaintext-bearer-v1';
          }
        | {
            kind: 'ssh';
            destination: string;
            sshPort?: number;
            remotePort: number;
            websocketPath: string;
          };
      expectedRootId: string;
      credentialEnv?: string;
    }
  | {
      kind: 'runtime-host-profile-set-environment';
      id: string;
      name: string;
      distribution: string;
      operator: RuntimeHostPosixOperatorCommand;
      expectedRootId: string;
    }
  | { kind: 'runtime-host-profile-remove'; id: string }
  | RuntimeHostCliHelp
  | RuntimeHostCliError;

export function parseRuntimeHostCommand(
  argv: string[],
  cliCommand = 'maka',
): RuntimeHostCliCommand {
  if (!argv[0] || argv[0] === '--help' || argv[0] === '-h') {
    return { kind: 'help', text: runtimeHostHelpText(cliCommand) };
  }
  if ((argv[1] === '--help' || argv[1] === '-h') && isRuntimeHostHelpTopic(argv[0])) {
    return { kind: 'help', text: runtimeHostCommandHelpText(cliCommand, argv[0]) };
  }
  if (argv[0] === 'activate' || argv[0] === 'connect') {
    return parseManagedRootFramedCommand(argv[0], argv.slice(1));
  }
  if (argv[0] === 'local-update-apply') return parseLocalUpdateApply(argv.slice(1));
  if (argv[0] === 'local-update-activate') return parseLocalUpdateActivate(argv.slice(1));
  if (argv[0] === 'local-source-retire') return parseLocalSourceRetire(argv.slice(1));
  if (argv[0] === 'serve') return parseServeCommand(argv.slice(1));
  if (argv[0] === 'setup') return parseSetupCommand(argv.slice(1));
  if (argv[0] === 'service') return parseServiceManagementCommand(argv.slice(1));
  if (argv[0] === 'access') return parseAccessCommand(argv.slice(1));
  if (argv[0] === 'project') return parseProjectCommand(argv.slice(1));
  if (argv[0] === 'plugin') return parsePluginCommand(argv.slice(1));
  if (argv[0] === 'capability-provider') {
    return parseCapabilityProviderCommand(argv.slice(1));
  }
  if (argv[0] === 'profile') return parseProfileCommand(argv.slice(1));
  return error(`Unexpected runtime-host command: ${argv[0]}`);
}

function parseManagedRootFramedCommand(
  action: 'activate' | 'connect',
  argv: string[],
): RuntimeHostCliCommand {
  let rootId: string | undefined;
  let framed = false;
  let repairRootAfterRemount = false;
  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--framed') {
      if (framed) return error('Duplicate --framed');
      framed = true;
      continue;
    }
    if (argument === '--root-id') {
      if (rootId !== undefined) return error('Duplicate --root-id');
      rootId = argv[index + 1];
      index += 1;
      if (rootId === undefined) return error('--root-id requires a value');
      continue;
    }
    if (argument === '--repair-root-after-remount') {
      if (repairRootAfterRemount) return error('Duplicate --repair-root-after-remount');
      repairRootAfterRemount = true;
      continue;
    }
    return error(`Unexpected runtime-host ${action} option: ${String(argument)}`);
  }
  if (!framed) return error(`runtime-host ${action} requires --framed`);
  if (!rootId || !/^[a-f0-9]{64}$/u.test(rootId)) {
    return error(`runtime-host ${action} requires a valid --root-id`);
  }
  return {
    kind: action === 'activate' ? 'runtime-host-managed-activate' : 'runtime-host-managed-connect',
    rootId,
    framed: true,
    ...(repairRootAfterRemount ? { repairRootAfterRemount: true } : {}),
  };
}

export function parseRuntimeHostInstalledUpdateCommand(
  argv: string[],
  cliCommand = 'maka',
): RuntimeHostCliCommand {
  if (argv[0] === '--help' || argv[0] === '-h') {
    return { kind: 'help', text: installedUpdateHelpText(cliCommand) };
  }
  let target: string | undefined;
  let allowInterruptActiveTasks = false;
  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--target') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (target !== undefined) return error('Duplicate --target');
      target = parsed;
      index += 1;
      continue;
    }
    if (argument === '--allow-interrupt-active-tasks') {
      if (allowInterruptActiveTasks) {
        return error('Duplicate --allow-interrupt-active-tasks');
      }
      allowInterruptActiveTasks = true;
      continue;
    }
    return error(`Unexpected argument: ${argument ?? ''}`);
  }
  if (!target) return error('update requires --target <latest|next|version>');
  const selector = parseUpdateSelector(target, 'update');
  if ('kind' in selector && selector.kind === 'error') return selector;
  return { kind: 'runtime-host-installed-update', selector, allowInterruptActiveTasks };
}

function parseLocalUpdateApply(argv: string[]): RuntimeHostCliCommand {
  const values = new Map<string, string>();
  let allowInterruptActiveTasks = false;
  const valueOptions = new Set([
    '--root',
    '--archive',
    '--installed-package-root',
    '--installed-cli-path',
    '--current-version',
    '--target-version',
    '--target-integrity',
    '--target-compatibility',
    '--expected-root-id',
    '--expected-deployment-revision',
    '--expected-owner-installation-id',
    '--expected-host-epoch',
  ]);
  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--allow-interrupt-active-tasks') {
      if (allowInterruptActiveTasks) return error(`Duplicate ${argument}`);
      allowInterruptActiveTasks = true;
      continue;
    }
    if (!argument || !valueOptions.has(argument))
      return error(`Unexpected argument: ${argument ?? ''}`);
    if (values.has(argument)) return error(`Duplicate ${argument}`);
    const parsed = optionValue(argv, index, argument);
    if (typeof parsed !== 'string') return parsed;
    values.set(argument, parsed);
    index += 1;
  }
  const required = (name: string): string | RuntimeHostCliError => {
    const value = values.get(name);
    return value ? value : error(`runtime-host local-update-apply requires ${name}`);
  };
  const rootPath = required('--root');
  if (typeof rootPath !== 'string') return rootPath;
  const archivePath = required('--archive');
  if (typeof archivePath !== 'string') return archivePath;
  const installedPackageRoot = required('--installed-package-root');
  if (typeof installedPackageRoot !== 'string') return installedPackageRoot;
  const installedCliPath = required('--installed-cli-path');
  if (typeof installedCliPath !== 'string') return installedCliPath;
  if (![rootPath, archivePath, installedPackageRoot, installedCliPath].every(isSafeAbsolutePath)) {
    return error('runtime-host local-update-apply paths must be absolute');
  }
  const currentVersion = required('--current-version');
  if (typeof currentVersion !== 'string') return currentVersion;
  const targetVersion = required('--target-version');
  if (typeof targetVersion !== 'string') return targetVersion;
  const targetIntegrity = required('--target-integrity');
  if (typeof targetIntegrity !== 'string') return targetIntegrity;
  if (!isProductReleaseVersion(currentVersion) || !isProductReleaseVersion(targetVersion)) {
    return error('runtime-host local-update-apply versions are invalid');
  }
  if (!isSha512PackageIntegrity(targetIntegrity)) {
    return error('runtime-host local-update-apply integrity is invalid');
  }
  const rawCompatibility = values.get('--target-compatibility');
  const targetCompatibility = rawCompatibility === undefined ? undefined : Number(rawCompatibility);
  if (
    targetCompatibility !== undefined &&
    (!Number.isSafeInteger(targetCompatibility) || targetCompatibility <= 0)
  ) {
    return error('runtime-host local-update-apply compatibility is invalid');
  }
  const expectedValues = [
    '--expected-root-id',
    '--expected-deployment-revision',
    '--expected-owner-installation-id',
    '--expected-host-epoch',
  ].map((name) => values.get(name));
  let expectedSource: RuntimeHostInstalledUpdateExpectedSource | undefined;
  if (expectedValues.some((value) => value !== undefined)) {
    if (!expectedValues.every((value) => value !== undefined && isSafeIdentity(value))) {
      return error(
        'runtime-host local-update-apply requires one complete expected source identity',
      );
    }
    const [rootId, deploymentRevision, ownerInstallationId, hostEpoch] = expectedValues as string[];
    if (!/^[a-f0-9]{64}$/u.test(rootId!)) {
      return error('runtime-host local-update-apply expected Root identity is invalid');
    }
    expectedSource = {
      rootId: rootId!,
      deploymentRevision: deploymentRevision!,
      ownerInstallationId: ownerInstallationId!,
      hostEpoch: hostEpoch!,
    };
  }
  return {
    kind: 'runtime-host-local-update-apply',
    rootPath,
    archivePath,
    installedPackageRoot,
    installedCliPath,
    currentVersion,
    targetVersion,
    targetIntegrity,
    ...(targetCompatibility === undefined ? {} : { targetCompatibility }),
    allowInterruptActiveTasks,
    ...(expectedSource ? { expectedSource } : {}),
  };
}

function parseLocalUpdateActivate(argv: string[]): RuntimeHostCliCommand {
  const values = new Map<string, string>();
  const options = new Set([
    '--root',
    '--expected-root-id',
    '--generation',
    '--candidate-entrypoint',
    '--takeover-host-epoch',
    '--await-coordinator-commit',
    '--expected-owner-installation-id',
    '--target-version',
    '--target-integrity',
  ]);
  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index];
    if (!argument || !options.has(argument)) return error(`Unexpected argument: ${argument ?? ''}`);
    if (values.has(argument)) return error(`Duplicate ${argument}`);
    const parsed = optionValue(argv, index, argument);
    if (typeof parsed !== 'string') return parsed;
    values.set(argument, parsed);
    index += 1;
  }
  const rootPath = values.get('--root');
  const expectedRootId = values.get('--expected-root-id');
  const generation = values.get('--generation');
  const candidateEntrypoint = values.get('--candidate-entrypoint');
  const takeoverHostEpoch = values.get('--takeover-host-epoch');
  const awaitCoordinatorCommit = values.get('--await-coordinator-commit') === 'true';
  const expectedOwnerInstallationId = values.get('--expected-owner-installation-id');
  const targetVersion = values.get('--target-version');
  const targetIntegrity = values.get('--target-integrity');
  if (!rootPath || !expectedRootId || !generation || !candidateEntrypoint) {
    return error('runtime-host local-update-activate requires its exact target identity');
  }
  if (!isSafeAbsolutePath(rootPath) || !isSafeAbsolutePath(candidateEntrypoint)) {
    return error('runtime-host local-update-activate paths must be absolute');
  }
  if (!/^[a-f0-9]{64}$/u.test(expectedRootId)) {
    return error('runtime-host local-update-activate root identity is invalid');
  }
  if (
    [
      generation,
      takeoverHostEpoch,
      expectedOwnerInstallationId,
      targetVersion,
      targetIntegrity,
    ].some((value) => value !== undefined && !isSafeIdentity(value))
  ) {
    return error('runtime-host local-update-activate generation is invalid');
  }
  if (
    (values.has('--await-coordinator-commit') && !awaitCoordinatorCommit) ||
    (awaitCoordinatorCommit &&
      (!expectedOwnerInstallationId || !targetVersion || !targetIntegrity)) ||
    (!awaitCoordinatorCommit &&
      (expectedOwnerInstallationId !== undefined ||
        targetVersion !== undefined ||
        targetIntegrity !== undefined))
  ) {
    return error('runtime-host local-update-activate coordinator expectation is invalid');
  }
  return {
    kind: 'runtime-host-local-update-activate',
    rootPath,
    expectedRootId,
    generation,
    candidateEntrypoint,
    awaitCoordinatorCommit,
    ...(takeoverHostEpoch ? { takeoverHostEpoch } : {}),
    ...(expectedOwnerInstallationId ? { expectedOwnerInstallationId } : {}),
    ...(targetVersion ? { targetVersion } : {}),
    ...(targetIntegrity ? { targetIntegrity } : {}),
  };
}

function parseLocalSourceRetire(argv: string[]): RuntimeHostCliCommand {
  const values = new Map<string, string>();
  let allowInterruptActiveTasks = false;
  const options = new Set(['--root', '--expected-root-id', '--expected-host-epoch']);
  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--allow-interrupt-active-tasks') {
      if (allowInterruptActiveTasks) return error(`Duplicate ${argument}`);
      allowInterruptActiveTasks = true;
      continue;
    }
    if (!argument || !options.has(argument)) return error(`Unexpected argument: ${argument ?? ''}`);
    if (values.has(argument)) return error(`Duplicate ${argument}`);
    const parsed = optionValue(argv, index, argument);
    if (typeof parsed !== 'string') return parsed;
    values.set(argument, parsed);
    index += 1;
  }
  const rootPath = values.get('--root');
  const expectedRootId = values.get('--expected-root-id');
  const expectedHostEpoch = values.get('--expected-host-epoch');
  if (!rootPath || !expectedRootId || !expectedHostEpoch) {
    return error('runtime-host local-source-retire requires its exact source Host identity');
  }
  if (!isSafeAbsolutePath(rootPath)) {
    return error('runtime-host local-source-retire root path must be absolute');
  }
  if (!/^[a-f0-9]{64}$/u.test(expectedRootId) || !isSafeIdentity(expectedHostEpoch)) {
    return error('runtime-host local-source-retire Host identity is invalid');
  }
  return {
    kind: 'runtime-host-local-source-retire',
    rootPath,
    expectedRootId,
    expectedHostEpoch,
    allowInterruptActiveTasks,
  };
}

function isSafeIdentity(value: string): boolean {
  return value.length <= 512 && !/[\u0000-\u001f\u007f]/u.test(value);
}

function parseSetupCommand(argv: string[]): RuntimeHostCliCommand {
  let principalId: string | undefined;
  let preset: 'desktop-client' | 'terminal-client' | undefined;
  let lifecycle: 'supervised' | 'on_demand' = 'supervised';
  let lifecycleProvided = false;
  let deferPairingCommit = false;
  let bindPairingToClient = false;
  let repairRootAfterRemount = false;
  let updateExisting = false;
  let reuseExistingEnvironment = false;
  let allowInterruptActiveTasks = false;
  let clientDataRoot: string | undefined;
  let enableDirectPeer = false;
  const coordinationRelays: string[] = [];
  const options = parseManagedServiceOptions(argv, {
    valueOptions: {
      '--client-data-root': (value) => {
        if (clientDataRoot !== undefined) return error('Duplicate --client-data-root');
        if (!isSafeAbsolutePath(value)) return error('--client-data-root must be an absolute path');
        clientDataRoot = value;
      },
      '--coordination-relay': (value) => {
        coordinationRelays.push(value);
      },
      '--principal': (value) => {
        principalId = value;
      },
      '--preset': (value) => {
        if (value !== 'desktop-client' && value !== 'terminal-client') {
          return error('--preset must be desktop-client or terminal-client');
        }
        preset = value;
      },
      '--lifecycle': (value) => {
        if (lifecycleProvided) return error('Duplicate --lifecycle');
        if (value !== 'supervised' && value !== 'on-demand') {
          return error('--lifecycle must be supervised or on-demand');
        }
        lifecycleProvided = true;
        lifecycle = value === 'on-demand' ? 'on_demand' : 'supervised';
      },
    },
    flagOptions: {
      '--enable-direct-peer': () => {
        if (enableDirectPeer) return error('Duplicate --enable-direct-peer');
        enableDirectPeer = true;
      },
      '--defer-pairing-commit': () => {
        if (deferPairingCommit) return error('Duplicate --defer-pairing-commit');
        deferPairingCommit = true;
      },
      '--bind-pairing-to-client': () => {
        if (bindPairingToClient) return error('Duplicate --bind-pairing-to-client');
        bindPairingToClient = true;
      },
      '--repair-root-after-remount': () => {
        if (repairRootAfterRemount) return error('Duplicate --repair-root-after-remount');
        repairRootAfterRemount = true;
      },
      '--allow-interrupt-active-tasks': () => {
        if (allowInterruptActiveTasks) return error('Duplicate --allow-interrupt-active-tasks');
        allowInterruptActiveTasks = true;
      },
      '--reuse-existing-environment': () => {
        if (reuseExistingEnvironment) return error('Duplicate --reuse-existing-environment');
        reuseExistingEnvironment = true;
      },
      '--update-existing': () => {
        if (updateExisting) return error('Duplicate --update-existing');
        updateExisting = true;
      },
    },
  });
  if ('kind' in options) return options;
  if (
    reuseExistingEnvironment &&
    ((lifecycle as string) !== 'on_demand' ||
      updateExisting ||
      enableDirectPeer ||
      deferPairingCommit ||
      bindPairingToClient)
  ) {
    return error(
      '--reuse-existing-environment requires on-demand local setup without update or remote pairing options',
    );
  }
  if (allowInterruptActiveTasks && !updateExisting) {
    return error('--allow-interrupt-active-tasks requires --update-existing');
  }
  if (!principalId || !/^[A-Za-z0-9_.:-]{1,128}$/u.test(principalId)) {
    return error('runtime-host setup requires a valid --principal');
  }
  if (!preset) return error('runtime-host setup requires --preset');
  if (!enableDirectPeer && coordinationRelays.length > 0) {
    return error('--coordination-relay requires --enable-direct-peer');
  }
  if (bindPairingToClient && !deferPairingCommit) {
    return error('--bind-pairing-to-client requires --defer-pairing-commit');
  }
  return {
    kind: 'runtime-host-setup',
    ...options,
    principalId,
    preset,
    lifecycle,
    deferPairingCommit,
    ...(bindPairingToClient ? { bindPairingToClient: true } : {}),
    ...(repairRootAfterRemount ? { repairRootAfterRemount: true } : {}),
    ...(updateExisting ? { updateExisting: true } : {}),
    ...(reuseExistingEnvironment ? { reuseExistingEnvironment: true } : {}),
    ...(allowInterruptActiveTasks ? { allowInterruptActiveTasks: true } : {}),
    ...(clientDataRoot ? { clientDataRoot } : {}),
    ...(enableDirectPeer ? { directPeer: { coordinationRelays } } : {}),
  };
}

function parseServiceManagementCommand(argv: string[]): RuntimeHostCliCommand {
  const action = argv[0];
  if (action === 'peer') return parseServicePeerCommand(argv.slice(1));
  if (action === 'mesh') return parseServicePeerMeshCommand(argv.slice(1));
  if (action === 'cleanup-deployment') {
    let clientDataRoot: string | undefined;
    let finalize = false;
    const options = parseManagedServiceOptions(argv.slice(1), {
      allowConfiguration: false,
      flagOptions: {
        '--finalize': () => {
          if (finalize) return error('Duplicate --finalize');
          finalize = true;
        },
      },
      valueOptions: {
        '--client-data-root': (value) => {
          if (clientDataRoot !== undefined) return error('Duplicate --client-data-root');
          if (!isSafeAbsolutePath(value))
            return error('--client-data-root must be an absolute path');
          clientDataRoot = value;
        },
      },
    });
    if ('kind' in options) return options;
    if (options.json) return error('Unexpected argument: --json');
    if (!options.expectedTarget) {
      return error('runtime-host service cleanup-deployment requires an expected target');
    }
    return {
      kind: 'runtime-host-managed-deployment-cleanup',
      ...(clientDataRoot ? { clientDataRoot } : {}),
      ...(options.managedRootId ? { managedRootId: options.managedRootId } : {}),
      ...(options.operatorDeploymentId
        ? { operatorDeploymentId: options.operatorDeploymentId }
        : {}),
      ...(finalize ? { finalize: true } : {}),
      expectedTarget: options.expectedTarget,
    };
  }
  if (
    action !== 'install' &&
    action !== 'configure' &&
    action !== 'status' &&
    action !== 'start' &&
    action !== 'stop' &&
    action !== 'restart' &&
    action !== 'retire' &&
    action !== 'check-update' &&
    action !== 'update' &&
    action !== 'update-policy' &&
    action !== 'reconcile-update' &&
    action !== 'logs' &&
    action !== 'uninstall'
  ) {
    return error(
      action
        ? `Unexpected runtime-host service command: ${action}`
        : 'runtime-host service requires install, configure, status, start, stop, restart, retire, peer, mesh, check-update, update, update-policy, reconcile-update, logs, or uninstall',
    );
  }

  let retainManagedDeployment = false;
  let allowInterruptActiveTasks = false;
  let allowManualUpdate = false;
  let clientDataRoot: string | undefined;
  let updateTarget: string | undefined;
  let expectedHost: RuntimeHostExpectedHost | undefined;
  let expectedConfigFingerprint: string | undefined;
  let expectedSourceVersion: string | undefined;
  const flagOptions: Readonly<Record<string, () => void | RuntimeHostCliError>> =
    action === 'uninstall'
      ? {
          '--retain-managed-deployment': () => {
            if (retainManagedDeployment) return error('Duplicate --retain-managed-deployment');
            retainManagedDeployment = true;
          },
          '--allow-interrupt-active-tasks': () => {
            if (allowInterruptActiveTasks) {
              return error('Duplicate --allow-interrupt-active-tasks');
            }
            allowInterruptActiveTasks = true;
          },
        }
      : action === 'update'
        ? {
            '--allow-interrupt-active-tasks': () => {
              if (allowInterruptActiveTasks) {
                return error('Duplicate --allow-interrupt-active-tasks');
              }
              allowInterruptActiveTasks = true;
            },
            '--allow-manual-update': () => {
              if (allowManualUpdate) return error('Duplicate --allow-manual-update');
              allowManualUpdate = true;
            },
          }
        : action === 'restart' || action === 'retire' || action === 'configure'
          ? {
              '--allow-interrupt-active-tasks': () => {
                if (allowInterruptActiveTasks) {
                  return error('Duplicate --allow-interrupt-active-tasks');
                }
                allowInterruptActiveTasks = true;
              },
            }
          : {};
  const options = parseManagedServiceOptions(argv.slice(1), {
    allowConfiguration: action === 'install' || action === 'configure',
    allowFramed: true,
    valueOptions: {
      '--client-data-root': (value) => {
        if (clientDataRoot !== undefined) return error('Duplicate --client-data-root');
        if (!isSafeAbsolutePath(value)) return error('--client-data-root must be an absolute path');
        clientDataRoot = value;
      },
      ...(action === 'check-update' || action === 'update' || action === 'update-policy'
        ? {
            '--target': (value: string) => {
              if (updateTarget !== undefined) return error('Duplicate --target');
              updateTarget = value;
            },
          }
        : {}),
      ...(action === 'update'
        ? {
            '--expected-source-version': (value: string) => {
              if (expectedSourceVersion !== undefined)
                return error('Duplicate --expected-source-version');
              if (!isProductReleaseVersion(value))
                return error('--expected-source-version must be an exact package version');
              expectedSourceVersion = value;
            },
          }
        : {}),
      ...(action === 'update' || action === 'restart'
        ? {
            '--expected-host-json': (value: string) => {
              if (expectedHost !== undefined) return error('Duplicate --expected-host-json');
              const parsed = parseExpectedHost(value);
              if ('kind' in parsed) return parsed;
              expectedHost = parsed;
            },
          }
        : {}),
      ...(action === 'configure' || action === 'update'
        ? {
            '--expected-config-fingerprint': (value: string) => {
              if (expectedConfigFingerprint !== undefined) {
                return error('Duplicate --expected-config-fingerprint');
              }
              if (!/^sha256:[a-f0-9]{64}$/u.test(value)) {
                return error(
                  '--expected-config-fingerprint must be a service configuration fingerprint',
                );
              }
              expectedConfigFingerprint = value;
            },
          }
        : {}),
    },
    flagOptions,
  });
  if ('kind' in options) return options;
  if (
    (action === 'retire' ||
      action === 'update' ||
      action === 'configure' ||
      action === 'uninstall') &&
    !options.expectedTarget
  ) {
    return error(`runtime-host service ${action} requires an expected target`);
  }
  if (action === 'configure' && !expectedConfigFingerprint) {
    return error('runtime-host service configure requires --expected-config-fingerprint');
  }
  if (action === 'configure' && options.projectDirectoryRoots === undefined) {
    return error('runtime-host service configure requires --project-root or --no-project-roots');
  }
  if (action === 'update-policy') {
    const policy = updateTarget === undefined ? undefined : parseUpdatePolicy(updateTarget);
    if (policy && 'exitCode' in policy) return policy;
    if (policy && policy.kind !== 'manual' && !options.expectedTarget) {
      return error('runtime-host service update-policy requires an expected target');
    }
    return {
      kind: 'runtime-host-service-update-policy',
      json: options.json,
      ...(options.framed ? { framed: true } : {}),
      ...(clientDataRoot ? { clientDataRoot } : {}),
      ...(options.managedRootId ? { managedRootId: options.managedRootId } : {}),
      ...(options.operatorDeploymentId
        ? { operatorDeploymentId: options.operatorDeploymentId }
        : {}),
      ...(policy ? { policy } : {}),
      ...(options.expectedTarget ? { expectedTarget: options.expectedTarget } : {}),
    };
  }
  if (action === 'reconcile-update') {
    return {
      kind: 'runtime-host-service-reconcile-update',
      json: options.json,
      ...(options.framed ? { framed: true } : {}),
      ...(clientDataRoot ? { clientDataRoot } : {}),
      ...(options.managedRootId ? { managedRootId: options.managedRootId } : {}),
      ...(options.operatorDeploymentId
        ? { operatorDeploymentId: options.operatorDeploymentId }
        : {}),
      ...(options.expectedTarget ? { expectedTarget: options.expectedTarget } : {}),
    };
  }
  if (action === 'check-update') {
    const selector = parseUpdateSelector(updateTarget);
    if ('kind' in selector && selector.kind === 'error') return selector;
    return {
      kind: 'runtime-host-service-check-update',
      json: options.json,
      ...(options.framed ? { framed: true } : {}),
      ...(clientDataRoot ? { clientDataRoot } : {}),
      ...(options.managedRootId ? { managedRootId: options.managedRootId } : {}),
      ...(options.operatorDeploymentId
        ? { operatorDeploymentId: options.operatorDeploymentId }
        : {}),
      selector,
      ...(options.expectedTarget ? { expectedTarget: options.expectedTarget } : {}),
    };
  }
  if (action === 'update') {
    if (
      (expectedHost || expectedSourceVersion || expectedConfigFingerprint) &&
      !options.managedRootId
    ) {
      return error('Observed Host and deployment fences require --managed-root-id');
    }
    const selector =
      updateTarget === undefined ? undefined : parseUpdateSelector(updateTarget, 'update');
    if (selector && 'kind' in selector && selector.kind === 'error') return selector;
    if (
      allowManualUpdate &&
      (selector?.kind !== 'exact' ||
        !options.managedRootId ||
        !options.expectedTarget?.deploymentId)
    ) {
      return error(
        '--allow-manual-update requires an exact --target, --managed-root-id, and --expected-deployment-id',
      );
    }
    return {
      kind: 'runtime-host-service-update',
      json: options.json,
      ...(options.framed ? { framed: true } : {}),
      ...(clientDataRoot ? { clientDataRoot } : {}),
      ...(options.managedRootId ? { managedRootId: options.managedRootId } : {}),
      ...(options.operatorDeploymentId
        ? { operatorDeploymentId: options.operatorDeploymentId }
        : {}),
      expectedTarget: options.expectedTarget!,
      ...(expectedHost ? { expectedHost } : {}),
      ...(expectedConfigFingerprint ? { expectedConfigFingerprint } : {}),
      ...(expectedSourceVersion ? { expectedSourceVersion } : {}),
      ...(selector ? { selector } : {}),
      ...(allowManualUpdate ? { allowManualUpdate: true } : {}),
      ...(allowInterruptActiveTasks ? { allowInterruptActiveTasks: true } : {}),
    };
  }
  if (expectedHost && !options.managedRootId)
    return error('--expected-host-json requires --managed-root-id');
  return {
    kind: 'runtime-host-service-manage',
    action,
    ...options,
    ...(expectedHost ? { expectedHost } : {}),
    ...(clientDataRoot ? { clientDataRoot } : {}),
    ...(options.managedRootId ? { managedRootId: options.managedRootId } : {}),
    ...(retainManagedDeployment ? { retainManagedDeployment: true } : {}),
    ...(allowInterruptActiveTasks ? { allowInterruptActiveTasks: true } : {}),
    ...(action === 'configure'
      ? {
          expectedConfigFingerprint: expectedConfigFingerprint!,
          projectDirectoryRoots: options.projectDirectoryRoots!,
        }
      : {}),
  };
}

function parseServicePeerCommand(argv: string[]): RuntimeHostCliCommand {
  const action = argv[0];
  if (
    action !== 'enable' &&
    action !== 'disable' &&
    action !== 'status' &&
    action !== 'rotate' &&
    action !== 'descriptor'
  ) {
    return error(
      action
        ? `Unexpected runtime-host service peer command: ${action}`
        : 'runtime-host service peer requires enable, disable, status, rotate, or descriptor',
    );
  }
  let clientDataRoot: string | undefined;
  const listenAddresses: string[] = [];
  const coordinationRelays: string[] = [];
  let clearCoordinationRelays = false;
  let automaticRelayDiscovery: boolean | undefined;
  let relayDiscoveryStatus = false;
  let defaultPublicStun = false;
  let noPublicStun = false;
  let webRtcStunStatus = false;
  const webRtcStunUrls: string[] = [];
  let allowInterruptActiveTasks = false;
  const options = parseManagedServiceOptions(argv.slice(1), {
    allowConfiguration: false,
    allowFramed: true,
    flagOptions: {
      '--clear-coordination-relays': () => {
        if (clearCoordinationRelays) return error('Duplicate --clear-coordination-relays');
        clearCoordinationRelays = true;
      },
      '--allow-interrupt-active-tasks': () => {
        if (allowInterruptActiveTasks) return error('Duplicate --allow-interrupt-active-tasks');
        allowInterruptActiveTasks = true;
      },
      '--automatic-relay-discovery': () => {
        if (automaticRelayDiscovery !== undefined) {
          return error('Relay discovery mode was specified more than once');
        }
        automaticRelayDiscovery = true;
      },
      '--no-automatic-relay-discovery': () => {
        if (automaticRelayDiscovery !== undefined) {
          return error('Relay discovery mode was specified more than once');
        }
        automaticRelayDiscovery = false;
      },
      '--relay-discovery-status': () => {
        if (relayDiscoveryStatus) return error('Duplicate --relay-discovery-status');
        relayDiscoveryStatus = true;
      },
      '--default-public-stun': () => {
        if (defaultPublicStun) return error('Duplicate --default-public-stun');
        defaultPublicStun = true;
      },
      '--no-public-stun': () => {
        if (noPublicStun) return error('Duplicate --no-public-stun');
        noPublicStun = true;
      },
      '--webrtc-stun-status': () => {
        if (webRtcStunStatus) return error('Duplicate --webrtc-stun-status');
        webRtcStunStatus = true;
      },
    },
    valueOptions: {
      '--client-data-root': (value) => {
        if (clientDataRoot !== undefined) return error('Duplicate --client-data-root');
        if (!isSafeAbsolutePath(value)) return error('--client-data-root must be an absolute path');
        clientDataRoot = value;
      },
      '--listen': (value) => {
        listenAddresses.push(value);
      },
      '--coordination-relay': (value) => {
        coordinationRelays.push(value);
      },
      '--webrtc-stun': (value) => {
        webRtcStunUrls.push(value);
      },
    },
  });
  if ('kind' in options) return options;
  if (options.framed && (action === 'rotate' || action === 'descriptor')) {
    return error(`runtime-host service peer ${action} does not support --framed`);
  }
  if (relayDiscoveryStatus && !options.framed) {
    return error('--relay-discovery-status requires --framed');
  }
  if (webRtcStunStatus && !options.framed) {
    return error('--webrtc-stun-status requires --framed');
  }
  if (Number(defaultPublicStun) + Number(noPublicStun) + Number(webRtcStunUrls.length > 0) > 1) {
    return error('Specify only one WebRTC STUN policy');
  }
  let webRtcStunPolicy: RuntimeHostWebRtcStunPolicy | undefined;
  try {
    webRtcStunPolicy = defaultPublicStun
      ? { kind: 'default' }
      : noPublicStun
        ? { kind: 'disabled' }
        : webRtcStunUrls.length > 0
          ? decodeRuntimeHostWebRtcStunPolicy({ kind: 'custom', urls: webRtcStunUrls })
          : undefined;
  } catch (failure) {
    return error(failure instanceof Error ? failure.message : String(failure));
  }
  if (listenAddresses.some(hasEphemeralRuntimeHostPeerPort)) {
    return error('--listen requires a stable non-zero transport port');
  }
  if (clearCoordinationRelays && coordinationRelays.length > 0) {
    return error('--clear-coordination-relays cannot be combined with --coordination-relay');
  }
  if (
    action !== 'enable' &&
    (listenAddresses.length > 0 ||
      coordinationRelays.length > 0 ||
      clearCoordinationRelays ||
      automaticRelayDiscovery !== undefined ||
      webRtcStunPolicy !== undefined)
  ) {
    return error('Peer listener options are only valid with peer enable');
  }
  if (allowInterruptActiveTasks && action !== 'enable' && action !== 'disable') {
    return error('--allow-interrupt-active-tasks is only valid with peer enable or peer disable');
  }
  if (!options.managedRootId || !options.operatorDeploymentId) {
    return error(
      'runtime-host service peer requires --managed-root-id and --operator-deployment-id',
    );
  }
  if (
    (action === 'enable' ||
      action === 'disable' ||
      action === 'rotate' ||
      action === 'descriptor') &&
    !options.expectedTarget
  ) {
    return error(`runtime-host service peer ${action} requires an expected target`);
  }
  return {
    kind: 'runtime-host-service-peer',
    action,
    json: options.json,
    ...(options.framed ? { framed: true as const } : {}),
    ...(clientDataRoot ? { clientDataRoot } : {}),
    managedRootId: options.managedRootId,
    operatorDeploymentId: options.operatorDeploymentId,
    listenAddresses,
    ...(clearCoordinationRelays
      ? { coordinationRelays: [] }
      : coordinationRelays.length > 0
        ? { coordinationRelays }
        : {}),
    ...(automaticRelayDiscovery === undefined ? {} : { automaticRelayDiscovery }),
    ...(relayDiscoveryStatus ? { relayDiscoveryStatus: true as const } : {}),
    ...(webRtcStunPolicy ? { webRtcStunPolicy } : {}),
    ...(webRtcStunStatus ? { webRtcStunStatus: true as const } : {}),
    ...(options.expectedTarget ? { expectedTarget: options.expectedTarget } : {}),
    ...(allowInterruptActiveTasks ? { allowInterruptActiveTasks: true } : {}),
  };
}

function parseServicePeerMeshCommand(argv: string[]): RuntimeHostCliCommand {
  const action = argv[0];
  if (
    action !== 'status' &&
    action !== 'create' &&
    action !== 'invite' &&
    action !== 'join' &&
    action !== 'remove' &&
    action !== 'leave' &&
    action !== 'close' &&
    action !== 'reconcile' &&
    action !== 'transit' &&
    action !== 'rename' &&
    action !== 'rename-mesh'
  ) {
    return error(
      action
        ? `Unexpected runtime-host service mesh command: ${action}`
        : 'runtime-host service mesh requires status, create, invite, join, remove, leave, close, reconcile, transit, rename, or rename-mesh',
    );
  }
  let meshId: string | null | undefined;
  let peerId: string | undefined;
  let displayName: string | null | undefined;
  let clientDataRoot: string | undefined;
  const options = parseManagedServiceOptions(argv.slice(1), {
    allowConfiguration: false,
    allowFramed: true,
    valueOptions: {
      '--client-data-root': (value) => {
        if (clientDataRoot !== undefined) return error('Duplicate --client-data-root');
        if (!isSafeAbsolutePath(value)) return error('--client-data-root must be an absolute path');
        clientDataRoot = value;
      },
      '--mesh': (value) => {
        if (meshId !== undefined) return error('Duplicate --mesh');
        if (!value || value.length > 128) return error('--mesh requires a valid Mesh ID');
        meshId = value;
      },
      '--peer': (value) => {
        if (peerId !== undefined) return error('Duplicate --peer');
        if (!value || value.length > 256) return error('--peer requires a valid Peer ID');
        peerId = value;
      },
      '--name': (value) => {
        if (displayName !== undefined) return error('Duplicate --name');
        if (!value.trim() || value.trim().length > 80) {
          return error('--name requires a display name of at most 80 characters');
        }
        displayName = value.trim();
      },
    },
    flagOptions: {
      '--off': () => {
        if (meshId !== undefined) return error('mesh transit accepts either --mesh or --off');
        meshId = null;
      },
      '--clear-name': () => {
        if (displayName !== undefined) return error('mesh rename accepts --name or --clear-name');
        displayName = null;
      },
    },
  });
  if ('kind' in options) return options;
  if (!options.managedRootId || !options.operatorDeploymentId || !options.expectedTarget) {
    return error(
      'runtime-host service mesh requires --managed-root-id, --operator-deployment-id, and an expected target',
    );
  }
  const needsMesh =
    action === 'invite' ||
    action === 'remove' ||
    action === 'leave' ||
    action === 'close' ||
    action === 'rename-mesh';
  if (needsMesh && typeof meshId !== 'string') {
    return error(`runtime-host service mesh ${action} requires --mesh`);
  }
  if (!needsMesh && action !== 'transit' && typeof meshId === 'string') {
    return error('--mesh is only valid with mesh invite, remove, leave, close, or transit');
  }
  if ((action === 'remove') !== (peerId !== undefined)) {
    return error(
      action === 'remove'
        ? 'runtime-host service mesh remove requires --peer'
        : '--peer is only valid with mesh remove',
    );
  }
  if (meshId === null && action !== 'transit') {
    return error('--off is only valid with mesh transit');
  }
  if (action === 'transit' && meshId === undefined) {
    return error('runtime-host service mesh transit requires --mesh or --off');
  }
  if ((action === 'rename' || action === 'rename-mesh') !== (displayName !== undefined)) {
    return error(
      action === 'rename'
        ? 'runtime-host service mesh rename requires --name or --clear-name'
        : '--name and --clear-name are only valid with mesh rename or rename-mesh',
    );
  }
  return {
    kind: 'runtime-host-service-peer-mesh',
    action,
    json: options.json,
    ...(options.framed ? { framed: true as const } : {}),
    managedRootId: options.managedRootId,
    operatorDeploymentId: options.operatorDeploymentId,
    expectedTarget: options.expectedTarget,
    ...(meshId !== undefined ? { meshId } : {}),
    ...(peerId ? { peerId } : {}),
    ...(displayName !== undefined ? { displayName } : {}),
  };
}

function parseUpdatePolicy(value: string): RuntimeHostManagedUpdatePolicy | RuntimeHostCliError {
  if (value === 'manual') return { kind: 'manual' };
  const selector = parseUpdateSelector(value, 'update-policy');
  if ('exitCode' in selector) return selector;
  return selector.kind === 'exact' ? { kind: 'fixed', version: selector.version } : selector;
}

function parseUpdateSelector(
  value: string | undefined,
  action: 'check-update' | 'update' | 'update-policy' = 'check-update',
): RuntimeHostUpdateSelector | RuntimeHostCliError {
  if (!value) return error(`runtime-host service ${action} requires --target`);
  if (value === 'latest' || value === 'next') {
    return { kind: 'channel', channel: value };
  }
  if (!isProductReleaseVersion(value)) {
    return error('--target must be latest, next, or an exact Maka version');
  }
  return { kind: 'exact', version: value };
}

function parseExpectedHost(value: string): RuntimeHostExpectedHost | RuntimeHostCliError {
  let parsed: unknown;
  try {
    parsed = JSON.parse(value) as unknown;
  } catch {
    return error('--expected-host-json must be valid JSON');
  }
  if (
    typeof parsed !== 'object' ||
    parsed === null ||
    Array.isArray(parsed) ||
    Object.keys(parsed).length !== 2 ||
    typeof (parsed as { hostEpoch?: unknown }).hostEpoch !== 'string' ||
    (parsed as { hostEpoch: string }).hostEpoch.length === 0 ||
    Buffer.byteLength((parsed as { hostEpoch: string }).hostEpoch, 'utf8') > 128 ||
    /[\u0000-\u001f\u007f]/u.test((parsed as { hostEpoch: string }).hostEpoch) ||
    !Number.isSafeInteger((parsed as { pid?: unknown }).pid) ||
    (parsed as { pid: number }).pid <= 0
  ) {
    return error('--expected-host-json must contain one valid hostEpoch and pid');
  }
  return {
    hostEpoch: (parsed as { hostEpoch: string }).hostEpoch,
    pid: (parsed as { pid: number }).pid,
  };
}

interface ManagedServiceOptions {
  readonly json: boolean;
  readonly framed?: true;
  readonly managedRootId?: string;
  readonly operatorDeploymentId?: string;
  readonly rootPath?: string;
  readonly projectDirectoryRoots?: {
    readonly label: string;
    readonly path: string;
  }[];
  readonly websocketPort?: number;
  readonly websocketPath?: string;
  readonly expectedTarget?: RuntimeHostManagedServiceTarget;
}

function parseManagedServiceOptions(
  argv: string[],
  input: {
    readonly valueOptions?: Readonly<Record<string, (value: string) => RuntimeHostCliError | void>>;
    readonly flagOptions?: Readonly<Record<string, () => RuntimeHostCliError | void>>;
    readonly allowConfiguration?: boolean;
    readonly allowFramed?: boolean;
  } = {},
): ManagedServiceOptions | RuntimeHostCliError {
  let json = false;
  let framed = false;
  let rootPath: string | undefined;
  let websocketPort: number | undefined;
  let websocketPath: string | undefined;
  let expectedServiceId: string | undefined;
  let expectedRootPath: string | undefined;
  let expectedRootId: string | undefined;
  let expectedDeploymentId: string | undefined;
  let managedRootId: string | undefined;
  let operatorDeploymentId: string | undefined;
  let projectDirectoryPolicySpecified = false;
  const projectDirectoryRoots: { label: string; path: string }[] = [];
  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--json') {
      if (json) return error('Duplicate --json');
      if (framed) return error('--json and --framed cannot be used together');
      json = true;
      continue;
    }
    if (argument === '--framed') {
      if (!input.allowFramed) return error(`Unexpected argument: ${argument}`);
      if (framed) return error('Duplicate --framed');
      if (json) return error('--json and --framed cannot be used together');
      framed = true;
      continue;
    }
    if (Object.hasOwn(input.flagOptions ?? {}, argument ?? '')) {
      const optionError = input.flagOptions?.[argument ?? '']?.();
      if (optionError) return optionError;
      continue;
    }
    if (argument === '--no-project-roots') {
      if (input.allowConfiguration === false) return error(`Unexpected argument: ${argument}`);
      if (projectDirectoryPolicySpecified) {
        return error('--no-project-roots cannot be combined with --project-root');
      }
      projectDirectoryPolicySpecified = true;
      continue;
    }
    const isTargetOption =
      argument === '--expected-service-id' ||
      argument === '--expected-root-path' ||
      argument === '--expected-root-id' ||
      argument === '--expected-deployment-id' ||
      argument === '--operator-deployment-id' ||
      argument === '--managed-root-id';
    const isExplicitlyAllowedOption = Object.hasOwn(input.valueOptions ?? {}, argument ?? '');
    if (input.allowConfiguration === false && !isTargetOption && !isExplicitlyAllowedOption) {
      return error(`Unexpected argument: ${argument ?? ''}`);
    }
    if (
      argument === '--root' ||
      argument === '--websocket-port' ||
      argument === '--websocket-path' ||
      argument === '--project-root' ||
      argument === '--project-root-json' ||
      argument === '--expected-service-id' ||
      argument === '--expected-root-path' ||
      argument === '--expected-root-id' ||
      argument === '--expected-deployment-id' ||
      argument === '--operator-deployment-id' ||
      argument === '--managed-root-id' ||
      Object.hasOwn(input.valueOptions ?? {}, argument ?? '')
    ) {
      const parsed = optionValue(argv, index, argument ?? '');
      if (typeof parsed !== 'string') return parsed;
      if (argument === '--root') rootPath = parsed;
      else if (argument === '--websocket-port') websocketPort = Number(parsed);
      else if (argument === '--websocket-path') websocketPath = parsed;
      else if (argument === '--expected-service-id') expectedServiceId = parsed;
      else if (argument === '--expected-root-path') expectedRootPath = parsed;
      else if (argument === '--expected-root-id') expectedRootId = parsed;
      else if (argument === '--expected-deployment-id') expectedDeploymentId = parsed;
      else if (argument === '--operator-deployment-id') operatorDeploymentId = parsed;
      else if (argument === '--managed-root-id') managedRootId = parsed;
      else if (argument === '--project-root' || argument === '--project-root-json') {
        if (projectDirectoryPolicySpecified && projectDirectoryRoots.length === 0) {
          return error('--project-root cannot be combined with --no-project-roots');
        }
        projectDirectoryPolicySpecified = true;
        const root =
          argument === '--project-root'
            ? parseProjectRoot(parsed, 'posix')
            : parseProjectRootJson(parsed, 'posix');
        if ('kind' in root) return root;
        if (projectDirectoryRoots.length >= PROJECT_DIRECTORY_MAX_ROOTS) {
          return error(
            `--project-root may be provided at most ${PROJECT_DIRECTORY_MAX_ROOTS} times`,
          );
        }
        if (projectDirectoryRoots.some((candidate) => candidate.label === root.label)) {
          return error(`Duplicate --project-root label: ${root.label}`);
        }
        projectDirectoryRoots.push(root);
      } else {
        const optionError = input.valueOptions?.[argument ?? '']?.(parsed);
        if (optionError) return optionError;
      }
      index += 1;
      continue;
    }
    return error(`Unexpected argument: ${argument ?? ''}`);
  }
  if (
    websocketPort !== undefined &&
    (!Number.isInteger(websocketPort) || websocketPort < 1 || websocketPort > 65_535)
  ) {
    return error('--websocket-port must be an integer between 1 and 65535');
  }
  if (websocketPath !== undefined && !isCanonicalRuntimeHostWebSocketPath(websocketPath)) {
    return error('--websocket-path must be a canonical absolute URL path');
  }
  if (expectedServiceId !== undefined && !/^[a-f0-9]{64}$/u.test(expectedServiceId)) {
    return error('--expected-service-id must be a Runtime Host managed service identity');
  }
  if (expectedRootId !== undefined && !/^[a-f0-9]{64}$/u.test(expectedRootId)) {
    return error('--expected-root-id must be a Runtime Host State Root identity');
  }
  if (
    expectedDeploymentId !== undefined &&
    !/^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/iu.test(
      expectedDeploymentId,
    )
  ) {
    return error('--expected-deployment-id must be a Runtime Host deployment identity');
  }
  if (managedRootId !== undefined && !/^[a-f0-9]{64}$/u.test(managedRootId)) {
    return error('--managed-root-id must be a Runtime Host State Root identity');
  }
  if (
    operatorDeploymentId !== undefined &&
    !/^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/iu.test(
      operatorDeploymentId,
    )
  ) {
    return error('--operator-deployment-id must be a Runtime Host deployment identity');
  }
  if (
    expectedRootPath !== undefined &&
    (expectedRootPath.length === 0 ||
      Buffer.byteLength(expectedRootPath, 'utf8') > 4 * 1024 ||
      /[\u0000-\u001f\u007f]/u.test(expectedRootPath))
  ) {
    return error('--expected-root-path is invalid');
  }
  const hasExpectedTarget =
    expectedServiceId !== undefined ||
    expectedRootPath !== undefined ||
    expectedRootId !== undefined ||
    expectedDeploymentId !== undefined;
  if (hasExpectedTarget && (!expectedServiceId || !expectedRootPath || !expectedRootId)) {
    return error(
      '--expected-service-id, --expected-root-path, and --expected-root-id must be provided together',
    );
  }
  return {
    json,
    ...(framed ? { framed: true as const } : {}),
    ...(managedRootId ? { managedRootId } : {}),
    ...(operatorDeploymentId ? { operatorDeploymentId } : {}),
    ...(rootPath ? { rootPath } : {}),
    ...(projectDirectoryPolicySpecified ? { projectDirectoryRoots } : {}),
    ...(websocketPort === undefined ? {} : { websocketPort }),
    ...(websocketPath === undefined ? {} : { websocketPath }),
    ...(expectedServiceId === undefined
      ? {}
      : {
          expectedTarget: {
            serviceId: expectedServiceId,
            rootPath: expectedRootPath!,
            rootId: expectedRootId!,
            ...(expectedDeploymentId ? { deploymentId: expectedDeploymentId } : {}),
          },
        }),
  };
}

function isSafeAbsolutePath(value: string): boolean {
  return isAbsolute(value) && !/[\u0000-\u001f\u007f]/u.test(value);
}

function parseProjectCommand(argv: string[]): RuntimeHostCliCommand {
  const action = argv[0];
  if (action !== 'list' && action !== 'add') {
    return error(
      action
        ? `Unexpected runtime-host project command: ${action}`
        : 'runtime-host project requires the list or add command',
    );
  }
  let rootPath: string | undefined;
  let path: string | undefined;
  let prefer = false;
  for (let index = 1; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--root') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      rootPath = parsed;
      index += 1;
      continue;
    }
    if (action === 'add' && argument === '--prefer') {
      prefer = true;
      continue;
    }
    if (action === 'add' && path === undefined) {
      path = argument;
      continue;
    }
    return error(`Unexpected argument: ${argument ?? ''}`);
  }
  if (action === 'list') {
    return {
      kind: 'runtime-host-project-list',
      ...(rootPath ? { rootPath } : {}),
    };
  }
  if (!path) return error('runtime-host project add requires a path');
  return {
    kind: 'runtime-host-project-add',
    path,
    prefer,
    ...(rootPath ? { rootPath } : {}),
  };
}

function parsePluginCommand(argv: string[]): RuntimeHostCliCommand {
  const action = argv[0];
  const actions = [
    'status',
    'list',
    'inspect',
    'failures',
    'install',
    'uninstall',
    'reload',
    'export',
    'apply',
    'reconcile',
  ] as const;
  if (!actions.includes(action as (typeof actions)[number])) {
    return error(
      action
        ? `Unexpected runtime-host plugin command: ${action}`
        : 'runtime-host plugin requires an action',
    );
  }
  let rootPath: string | undefined;
  let rootId: string | undefined;
  let cursor: string | undefined;
  let limit: number | undefined;
  const positional: string[] = [];
  for (let index = 1; index < argv.length; index += 1) {
    const argument = argv[index];
    if (
      argument === '--root' ||
      argument === '--scope' ||
      argument === '--cursor' ||
      argument === '--limit'
    ) {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (argument === '--root') rootPath = parsed;
      else if (argument === '--scope') rootId = parsed;
      else if (argument === '--cursor') cursor = parsed;
      else {
        const numeric = Number(parsed);
        if (!Number.isSafeInteger(numeric) || numeric < 0 || numeric < 1 || numeric > 64) {
          return error('--limit requires an integer between 1 and 64');
        }
        limit = numeric;
      }
      index += 1;
      continue;
    }
    positional.push(argument ?? '');
  }
  const selected = action as (typeof actions)[number];
  const expected =
    selected === 'export'
      ? 2
      : ['install', 'uninstall', 'reload', 'apply'].includes(selected)
        ? 1
        : 0;
  if (positional.length !== expected) {
    return error(
      `runtime-host plugin ${selected} requires ${expected} target${expected === 1 ? '' : 's'}`,
    );
  }
  if (rootId && selected !== 'inspect') return error('--scope is only valid for plugin inspect');
  if (
    (cursor !== undefined || limit !== undefined) &&
    !['list', 'inspect', 'failures'].includes(selected)
  ) {
    return error('--cursor and --limit require a paged Plugin query');
  }
  return {
    kind: 'runtime-host-plugin',
    action: selected,
    ...(rootPath ? { rootPath } : {}),
    ...(positional[0] ? { subject: positional[0] } : {}),
    ...(positional[1] ? { targetPath: positional[1] } : {}),
    ...(rootId ? { rootId } : {}),
    ...(cursor ? { cursor } : {}),
    ...(limit === undefined ? {} : { limit }),
  };
}

function parseProfileCommand(argv: string[]): RuntimeHostCliCommand {
  const action = argv[0];
  if (action === 'list') {
    return argv.length === 1
      ? { kind: 'runtime-host-profile-list' }
      : error(`Unexpected argument: ${argv[1] ?? ''}`);
  }
  if (action === 'remove') {
    if (argv[1] !== '--id') return error('runtime-host profile remove requires --id');
    const id = optionValue(argv, 1, '--id');
    if (typeof id !== 'string') return id;
    return argv.length === 3
      ? { kind: 'runtime-host-profile-remove', id }
      : error(`Unexpected argument: ${argv[3] ?? ''}`);
  }
  if (action !== 'set') {
    return error(
      action
        ? `Unexpected runtime-host profile command: ${action}`
        : 'runtime-host profile requires the list, set, or remove command',
    );
  }
  let id: string | undefined;
  let name: string | undefined;
  let tlsUrl: string | undefined;
  let plaintextUrl: string | undefined;
  let acknowledgePlaintext = false;
  let sshDestination: string | undefined;
  let sshPort: number | undefined;
  let sshRemotePort: number | undefined;
  let sshWebSocketPath = '/runtime-host';
  let sshWebSocketPathConfigured = false;
  let wslDistribution: string | undefined;
  let operator: RuntimeHostPosixOperatorCommand | undefined;
  let operatorPath: string | undefined;
  let expectedRootId: string | undefined;
  let credentialEnv: string | undefined;
  for (let index = 1; index < argv.length; index += 1) {
    const argument = argv[index];
    if (
      argument !== '--id' &&
      argument !== '--name' &&
      argument !== '--tls-url' &&
      argument !== '--plaintext-url' &&
      argument !== '--ssh-destination' &&
      argument !== '--ssh-port' &&
      argument !== '--ssh-remote-port' &&
      argument !== '--ssh-websocket-path' &&
      argument !== '--wsl-distribution' &&
      argument !== '--operator-command' &&
      argument !== '--operator-path' &&
      argument !== '--expected-root' &&
      argument !== '--credential-env' &&
      argument !== '--acknowledge-plaintext'
    ) {
      return error(`Unexpected argument: ${argument ?? ''}`);
    }
    if (argument === '--acknowledge-plaintext') {
      acknowledgePlaintext = true;
      continue;
    }
    const parsed = optionValue(argv, index, argument);
    if (typeof parsed !== 'string') return parsed;
    if (argument === '--id') id = parsed;
    if (argument === '--name') name = parsed;
    if (argument === '--tls-url') tlsUrl = parsed;
    if (argument === '--plaintext-url') plaintextUrl = parsed;
    if (argument === '--ssh-destination') sshDestination = parsed;
    if (argument === '--ssh-port') sshPort = Number(parsed);
    if (argument === '--ssh-remote-port') sshRemotePort = Number(parsed);
    if (argument === '--ssh-websocket-path') {
      sshWebSocketPath = parsed;
      sshWebSocketPathConfigured = true;
    }
    if (argument === '--wsl-distribution') wslDistribution = parsed;
    if (argument === '--operator-command') {
      try {
        operator = decodeRuntimeHostPosixOperatorCommand(JSON.parse(parsed));
      } catch {
        return error('--operator-command must be a valid Runtime Host operator command JSON value');
      }
    }
    if (argument === '--operator-path') operatorPath = parsed;
    if (argument === '--expected-root') expectedRootId = parsed;
    if (argument === '--credential-env') credentialEnv = parsed;
    index += 1;
  }
  if (!id) return error('--id is required');
  if (!name) return error('--name is required');
  if (operator && operatorPath) {
    return error('--operator-command and --operator-path cannot be combined');
  }
  if (operatorPath) {
    try {
      operator = createRuntimeHostLegacyPosixOperatorCommand(operatorPath);
    } catch {
      return error('--operator-path must be an absolute POSIX path');
    }
  }
  if (
    (tlsUrl ? 1 : 0) +
      (plaintextUrl ? 1 : 0) +
      (sshDestination ? 1 : 0) +
      (wslDistribution ? 1 : 0) !==
    1
  ) {
    return error(
      'exactly one of --tls-url, --plaintext-url, --ssh-destination, or --wsl-distribution is required',
    );
  }
  if (wslDistribution && !operator) {
    return error('--wsl-distribution requires --operator-command or --operator-path');
  }
  if (!wslDistribution && operatorPath) return error('--operator-path requires --wsl-distribution');
  if (!wslDistribution && operator) return error('--operator-command requires --wsl-distribution');
  if (wslDistribution && credentialEnv) {
    return error('WSL environment profiles do not accept --credential-env');
  }
  if (plaintextUrl && !acknowledgePlaintext) {
    return error('--plaintext-url requires --acknowledge-plaintext');
  }
  if (!plaintextUrl && acknowledgePlaintext) {
    return error('--acknowledge-plaintext requires --plaintext-url');
  }
  if (
    !sshDestination &&
    (sshPort !== undefined || sshRemotePort !== undefined || sshWebSocketPathConfigured)
  ) {
    return error('SSH options require --ssh-destination');
  }
  if (sshDestination && !sshRemotePort) {
    return error('--ssh-destination requires --ssh-remote-port');
  }
  if (sshPort !== undefined && (!Number.isInteger(sshPort) || sshPort < 1 || sshPort > 65_535)) {
    return error('--ssh-port must be an integer between 1 and 65535');
  }
  if (
    sshRemotePort !== undefined &&
    (!Number.isInteger(sshRemotePort) || sshRemotePort < 1 || sshRemotePort > 65_535)
  ) {
    return error('--ssh-remote-port must be an integer between 1 and 65535');
  }
  if (!expectedRootId) return error('--expected-root is required');
  if (wslDistribution) {
    return {
      kind: 'runtime-host-profile-set-environment',
      id,
      name,
      distribution: wslDistribution,
      operator: operator!,
      expectedRootId,
    };
  }
  const transport = tlsUrl
    ? ({ kind: 'tls', url: tlsUrl } as const)
    : plaintextUrl
      ? ({
          kind: 'plaintext',
          url: plaintextUrl,
          acknowledgement: 'plaintext-bearer-v1',
        } as const)
      : ({
          kind: 'ssh',
          destination: sshDestination!,
          ...(sshPort === undefined ? {} : { sshPort }),
          remotePort: sshRemotePort!,
          websocketPath: sshWebSocketPath,
        } as const);
  return {
    kind: 'runtime-host-profile-set',
    id,
    name,
    transport,
    expectedRootId,
    ...(credentialEnv ? { credentialEnv } : {}),
  };
}

function parseCapabilityProviderCommand(argv: string[]): RuntimeHostCliCommand {
  if (argv[0] !== 'serve') {
    return error(
      argv[0]
        ? `Unexpected runtime-host capability-provider command: ${argv[0]}`
        : 'runtime-host capability-provider requires the serve command',
    );
  }
  let url: string | undefined;
  let mcpConfigPath: string | undefined;
  let expectedRootId: string | undefined;
  let credentialEnv: string | undefined;
  let clientIdentityPath: string | undefined;
  for (let index = 1; index < argv.length; index += 1) {
    const argument = argv[index];
    if (
      argument === '--url' ||
      argument === '--mcp-config' ||
      argument === '--expected-root' ||
      argument === '--credential-env' ||
      argument === '--client-identity'
    ) {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (argument === '--url') url = parsed;
      if (argument === '--mcp-config') mcpConfigPath = parsed;
      if (argument === '--expected-root') expectedRootId = parsed;
      if (argument === '--credential-env') credentialEnv = parsed;
      if (argument === '--client-identity') clientIdentityPath = parsed;
      index += 1;
      continue;
    }
    return error(`Unexpected argument: ${argument ?? ''}`);
  }
  if (!url) return error('--url is required');
  if (!mcpConfigPath) return error('--mcp-config is required');
  if (!expectedRootId) return error('--expected-root is required');
  return {
    kind: 'runtime-host-capability-provider-serve',
    url,
    mcpConfigPath,
    expectedRootId,
    ...(credentialEnv ? { credentialEnv } : {}),
    ...(clientIdentityPath ? { clientIdentityPath } : {}),
  };
}

function parseServeCommand(argv: string[]): RuntimeHostCliCommand {
  let rootPath: string | undefined;
  let managedServiceConfigPath: string | undefined;
  let managedRootId: string | undefined;
  let managedDeploymentId: string | undefined;
  let managedConfigRevision: number | undefined;
  let json = false;
  let websocketHost = '127.0.0.1';
  let websocketConfigured = false;
  let websocketPort: number | undefined;
  let websocketPath: string | undefined;
  let tlsCertificatePath: string | undefined;
  let tlsPrivateKeyPath: string | undefined;
  let allowInsecureRemote = false;
  let peerNativePath: string | undefined;
  let peerKeyPath: string | undefined;
  let peerId: string | undefined;
  const allowedOrigins: string[] = [];
  const peerListenAddresses: string[] = [];
  const peerCoordinationRelays: string[] = [];
  const projectDirectoryRoots: { label: string; path: string }[] = [];
  let projectDirectoryPolicySpecified = false;
  for (let index = 0; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--json') {
      json = true;
      continue;
    }
    if (argument === '--allow-insecure-remote') {
      allowInsecureRemote = true;
      websocketConfigured = true;
      continue;
    }
    if (argument === '--root') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      rootPath = parsed;
      index += 1;
      continue;
    }
    if (argument === '--managed-service-config') {
      if (managedServiceConfigPath !== undefined) {
        return error('Duplicate --managed-service-config');
      }
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (!isSafeAbsolutePath(parsed)) {
        return error('--managed-service-config must be an absolute path');
      }
      managedServiceConfigPath = parsed;
      index += 1;
      continue;
    }
    if (
      argument === '--root-id' ||
      argument === '--deployment-id' ||
      argument === '--config-revision'
    ) {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (argument === '--root-id') {
        if (managedRootId !== undefined) return error('Duplicate --root-id');
        managedRootId = parsed;
      } else if (argument === '--deployment-id') {
        if (managedDeploymentId !== undefined) return error('Duplicate --deployment-id');
        managedDeploymentId = parsed;
      } else {
        if (managedConfigRevision !== undefined) return error('Duplicate --config-revision');
        managedConfigRevision = Number(parsed);
      }
      index += 1;
      continue;
    }
    if (argument === '--project-root' || argument === '--project-root-json') {
      if (projectDirectoryPolicySpecified && projectDirectoryRoots.length === 0) {
        return error('--project-root cannot be combined with --no-project-roots');
      }
      projectDirectoryPolicySpecified = true;
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      const root =
        argument === '--project-root'
          ? parseProjectRoot(parsed, 'native')
          : parseProjectRootJson(parsed, 'native');
      if ('kind' in root) return root;
      if (projectDirectoryRoots.length >= PROJECT_DIRECTORY_MAX_ROOTS) {
        return error(`--project-root may be provided at most ${PROJECT_DIRECTORY_MAX_ROOTS} times`);
      }
      if (projectDirectoryRoots.some((candidate) => candidate.label === root.label)) {
        return error(`Duplicate --project-root label: ${root.label}`);
      }
      projectDirectoryRoots.push(root);
      index += 1;
      continue;
    }
    if (argument === '--no-project-roots') {
      if (projectDirectoryPolicySpecified) {
        return error('--no-project-roots cannot be combined with --project-root');
      }
      projectDirectoryPolicySpecified = true;
      continue;
    }
    if (argument === '--websocket-host') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      websocketHost = parsed;
      websocketConfigured = true;
      index += 1;
      continue;
    }
    if (argument === '--websocket-port') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      websocketPort = Number(parsed);
      websocketConfigured = true;
      if (!Number.isInteger(websocketPort) || websocketPort < 1 || websocketPort > 65_535) {
        return error('--websocket-port must be an integer between 1 and 65535');
      }
      index += 1;
      continue;
    }
    if (argument === '--websocket-path') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      websocketPath = parsed;
      websocketConfigured = true;
      index += 1;
      continue;
    }
    if (argument === '--tls-certificate' || argument === '--tls-private-key') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (argument === '--tls-certificate') tlsCertificatePath = parsed;
      else tlsPrivateKeyPath = parsed;
      websocketConfigured = true;
      index += 1;
      continue;
    }
    if (argument === '--allow-origin') {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      allowedOrigins.push(parsed);
      websocketConfigured = true;
      index += 1;
      continue;
    }
    if (
      argument === '--peer-native-path' ||
      argument === '--peer-key' ||
      argument === '--peer-id' ||
      argument === '--peer-listen' ||
      argument === '--peer-coordination-relay'
    ) {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (argument === '--peer-native-path') peerNativePath = parsed;
      if (argument === '--peer-key') peerKeyPath = parsed;
      if (argument === '--peer-id') peerId = parsed;
      if (argument === '--peer-listen') peerListenAddresses.push(parsed);
      if (argument === '--peer-coordination-relay') peerCoordinationRelays.push(parsed);
      index += 1;
      continue;
    }
    return error(`Unexpected argument: ${argument ?? ''}`);
  }
  if ((tlsCertificatePath === undefined) !== (tlsPrivateKeyPath === undefined)) {
    return error('--tls-certificate and --tls-private-key must be provided together');
  }
  if (allowInsecureRemote && tlsCertificatePath !== undefined) {
    return error('--allow-insecure-remote cannot be combined with TLS');
  }
  if (websocketConfigured && websocketPort === undefined) {
    return error('--websocket-port is required for WebSocket options');
  }
  if (websocketPath !== undefined && !isCanonicalRuntimeHostWebSocketPath(websocketPath)) {
    return error('--websocket-path must be a canonical absolute URL path');
  }
  if ((peerNativePath === undefined) !== (peerKeyPath === undefined)) {
    return error('--peer-native-path and --peer-key must be provided together');
  }
  if (
    peerNativePath === undefined &&
    (peerId !== undefined || peerListenAddresses.length > 0 || peerCoordinationRelays.length > 0)
  ) {
    return error('peer listener options require --peer-native-path and --peer-key');
  }
  if (
    managedServiceConfigPath !== undefined &&
    (rootPath !== undefined ||
      projectDirectoryPolicySpecified ||
      websocketConfigured ||
      peerNativePath !== undefined)
  ) {
    return error('--managed-service-config cannot be combined with Runtime Host settings');
  }
  const managedDeploymentSpecified =
    managedRootId !== undefined ||
    managedDeploymentId !== undefined ||
    managedConfigRevision !== undefined;
  if (
    managedDeploymentSpecified &&
    (managedRootId === undefined ||
      managedDeploymentId === undefined ||
      managedConfigRevision === undefined)
  ) {
    return error('--root-id, --deployment-id, and --config-revision must be provided together');
  }
  if (
    managedRootId !== undefined &&
    (!/^[a-f0-9]{64}$/u.test(managedRootId) ||
      !/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/u.test(
        managedDeploymentId!,
      ) ||
      !Number.isSafeInteger(managedConfigRevision) ||
      managedConfigRevision! < 1)
  ) {
    return error('Managed deployment identity is invalid');
  }
  if (
    managedRootId !== undefined &&
    (managedServiceConfigPath !== undefined ||
      rootPath !== undefined ||
      projectDirectoryPolicySpecified ||
      websocketConfigured ||
      peerNativePath !== undefined)
  ) {
    return error('Managed deployment identity cannot be combined with Runtime Host settings');
  }
  return {
    kind: 'runtime-host-serve',
    json,
    ...(managedServiceConfigPath ? { managedServiceConfigPath } : {}),
    ...(managedRootId
      ? {
          managedDeployment: {
            rootId: managedRootId,
            deploymentId: managedDeploymentId!,
            configRevision: managedConfigRevision!,
          },
        }
      : {}),
    ...(rootPath ? { rootPath } : {}),
    ...(projectDirectoryPolicySpecified ? { projectDirectoryRoots } : {}),
    ...(websocketPort === undefined
      ? {}
      : {
          websocket: {
            host: websocketHost,
            port: websocketPort,
            ...(websocketPath ? { path: websocketPath } : {}),
            ...(tlsCertificatePath ? { tlsCertificatePath } : {}),
            ...(tlsPrivateKeyPath ? { tlsPrivateKeyPath } : {}),
            ...(allowedOrigins.length > 0 ? { allowedOrigins } : {}),
            ...(allowInsecureRemote ? { allowInsecureRemote: true } : {}),
          },
        }),
    ...(peerNativePath === undefined
      ? {}
      : {
          peer: {
            nativePath: peerNativePath,
            keyPath: peerKeyPath!,
            ...(peerId ? { expectedPeerId: peerId } : {}),
            ...(peerListenAddresses.length > 0 ? { listenAddresses: peerListenAddresses } : {}),
            ...(peerCoordinationRelays.length > 0
              ? { coordinationRelays: peerCoordinationRelays }
              : {}),
          },
        }),
  };
}

function parseProjectRoot(
  value: string,
  pathKind: 'native' | 'posix',
): { label: string; path: string } | RuntimeHostCliError {
  const separator = value.indexOf('=');
  if (separator <= 0 || separator === value.length - 1) {
    return error('--project-root must use <label>=<absolute-path>');
  }
  const root = canonicalProjectDirectoryRootSpec({
    label: value.slice(0, separator),
    path: value.slice(separator + 1),
  });
  if (!projectRootValid(root, pathKind)) {
    return error(
      `--project-root must use a valid label and absolute ${pathKind === 'posix' ? 'POSIX' : 'Host'} path`,
    );
  }
  return root;
}

function parseProjectRootJson(
  value: string,
  pathKind: 'native' | 'posix',
): { label: string; path: string } | RuntimeHostCliError {
  let parsed: unknown;
  try {
    parsed = JSON.parse(value);
  } catch {
    return error('--project-root-json must be a JSON object with label and path');
  }
  if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) {
    return error('--project-root-json must be a JSON object with label and path');
  }
  const root = parsed as Record<string, unknown>;
  if (
    Object.keys(root).length !== 2 ||
    typeof root.label !== 'string' ||
    typeof root.path !== 'string'
  ) {
    return error('--project-root-json must be a JSON object with label and path');
  }
  const canonical = canonicalProjectDirectoryRootSpec({
    label: root.label,
    path: root.path,
  });
  if (!projectRootValid(canonical, pathKind)) {
    return error(
      `--project-root-json must use a valid label and absolute ${pathKind === 'posix' ? 'POSIX' : 'Host'} path`,
    );
  }
  return canonical;
}

function projectRootValid(
  root: { readonly label: string; readonly path: string },
  pathKind: 'native' | 'posix',
): boolean {
  return pathKind === 'posix'
    ? projectDirectoryPosixRootSpecValid(root)
    : projectDirectoryRootSpecValid(root) && isAbsolute(root.path);
}

function parseAccessCommand(argv: string[]): RuntimeHostCliCommand {
  const action = argv[0];
  if (
    action !== 'list' &&
    action !== 'issue' &&
    action !== 'prepare' &&
    action !== 'revoke' &&
    action !== 'connection-code'
  ) {
    return error(
      action
        ? `Unexpected runtime-host access command: ${action}`
        : 'runtime-host access requires connection-code, list, issue, prepare, or revoke',
    );
  }
  let rootPath: string | undefined;
  let expectedRootId: string | undefined;
  let framed = false;
  let principalId: string | undefined;
  let principalKind: 'remote_owner' | 'capability_provider' = 'remote_owner';
  let principalKindSpecified = false;
  let credentialId: string | undefined;
  let capabilityOwnerCredentialId: string | undefined;
  let currentCredentialFingerprint: string | undefined;
  let name: string | undefined;
  const operationGrants: string[] = [];
  let canPublishClientCapabilities = false;
  let canUseHostPaths = false;
  let preset: 'desktop-client' | 'terminal-client' | undefined;
  for (let index = 1; index < argv.length; index += 1) {
    const argument = argv[index];
    if (argument === '--framed') {
      if (framed) return error('Duplicate --framed');
      framed = true;
      continue;
    }
    if (argument === '--publish-client-capabilities') {
      canPublishClientCapabilities = true;
      continue;
    }
    if (argument === '--allow-host-paths') {
      canUseHostPaths = true;
      continue;
    }
    if (
      argument === '--root' ||
      argument === '--expected-root' ||
      argument === '--name' ||
      argument === '--kind' ||
      argument === '--preset' ||
      argument === '--principal' ||
      argument === '--grant' ||
      argument === '--credential' ||
      argument === '--capability-owner-credential' ||
      argument === '--current-fingerprint'
    ) {
      const parsed = optionValue(argv, index, argument);
      if (typeof parsed !== 'string') return parsed;
      if (argument === '--root') rootPath = parsed;
      if (argument === '--expected-root') expectedRootId = parsed;
      if (argument === '--name') name = parsed;
      if (argument === '--kind') {
        if (parsed !== 'remote-owner' && parsed !== 'capability-provider') {
          return error('--kind must be remote-owner or capability-provider');
        }
        principalKind = parsed === 'remote-owner' ? 'remote_owner' : 'capability_provider';
        principalKindSpecified = true;
      }
      if (argument === '--preset') {
        if (parsed !== 'desktop-client' && parsed !== 'terminal-client') {
          return error('--preset must be desktop-client or terminal-client');
        }
        preset = parsed;
      }
      if (argument === '--principal') principalId = parsed;
      if (argument === '--grant') operationGrants.push(parsed);
      if (argument === '--credential') credentialId = parsed;
      if (argument === '--capability-owner-credential') capabilityOwnerCredentialId = parsed;
      if (argument === '--current-fingerprint') currentCredentialFingerprint = parsed;
      index += 1;
      continue;
    }
    return error(`Unexpected argument: ${argument ?? ''}`);
  }
  if (expectedRootId && !/^[a-f0-9]{64}$/u.test(expectedRootId)) {
    return error('--expected-root must be a Runtime Host root identity');
  }
  if (action === 'connection-code') {
    if (
      principalId ||
      principalKindSpecified ||
      operationGrants.length > 0 ||
      canPublishClientCapabilities ||
      canUseHostPaths ||
      preset ||
      credentialId ||
      capabilityOwnerCredentialId ||
      currentCredentialFingerprint
    ) {
      return error('Credential management options are not valid for access connection-code');
    }
    return {
      kind: 'runtime-host-access-connection-code',
      ...(rootPath ? { rootPath } : {}),
      ...(expectedRootId ? { expectedRootId } : {}),
      ...(name ? { name } : {}),
      framed,
    };
  }
  if (action === 'list') {
    if (
      principalId ||
      principalKindSpecified ||
      operationGrants.length > 0 ||
      canPublishClientCapabilities ||
      canUseHostPaths ||
      preset ||
      credentialId ||
      capabilityOwnerCredentialId ||
      currentCredentialFingerprint ||
      name
    ) {
      return error('Credential mutation options are not valid for access list');
    }
    return {
      kind: 'runtime-host-access-list',
      ...(rootPath ? { rootPath } : {}),
      ...(expectedRootId ? { expectedRootId } : {}),
      framed,
    };
  }
  if (action === 'prepare') {
    if (!framed) return error('access prepare is reserved for framed operator management');
    if (!currentCredentialFingerprint) return error('--current-fingerprint is required');
    if (!/^[a-f0-9]{32}$/u.test(currentCredentialFingerprint)) {
      return error('--current-fingerprint must be a Runtime Host credential fingerprint');
    }
    if (
      principalId ||
      principalKindSpecified ||
      operationGrants.length > 0 ||
      canPublishClientCapabilities ||
      canUseHostPaths ||
      preset ||
      credentialId ||
      capabilityOwnerCredentialId ||
      name
    ) {
      return error('Credential issue options are not valid for access prepare');
    }
    return {
      kind: 'runtime-host-access-prepare',
      ...(rootPath ? { rootPath } : {}),
      ...(expectedRootId ? { expectedRootId } : {}),
      currentCredentialFingerprint,
    };
  }
  if (action === 'issue') {
    if (framed) return error('--framed is only valid for access management');
    if (!principalId) return error('--principal is required');
    if (credentialId || currentCredentialFingerprint || name) {
      return error('Credential target options are only valid for access revoke');
    }
    if (
      preset &&
      (principalKindSpecified ||
        operationGrants.length > 0 ||
        canPublishClientCapabilities ||
        canUseHostPaths)
    ) {
      return error('--preset cannot be combined with --kind, --grant, or authority flags');
    }
    if (preset) {
      if (capabilityOwnerCredentialId) {
        return error('--capability-owner-credential requires --kind capability-provider');
      }
      return {
        kind: 'runtime-host-access-issue',
        ...(rootPath ? { rootPath } : {}),
        ...(expectedRootId ? { expectedRootId } : {}),
        principalKind: 'remote_owner',
        principalId,
        operationGrants,
        canPublishClientCapabilities: false,
        canUseHostPaths: false,
        preset,
      };
    }
    if (principalKind === 'capability_provider') {
      const requiredGrants = ['client.capability.replace', 'client.capability.unregister'];
      if (canUseHostPaths) return error('A capability provider cannot use Host paths');
      if (operationGrants.length === 0) operationGrants.push(...requiredGrants);
      if (
        operationGrants.length !== requiredGrants.length ||
        requiredGrants.some((grant) => !operationGrants.includes(grant))
      ) {
        return error('A capability provider may grant only Client Capability publication');
      }
      canPublishClientCapabilities = true;
    } else {
      if (capabilityOwnerCredentialId) {
        return error('--capability-owner-credential requires --kind capability-provider');
      }
      if (operationGrants.length === 0) return error('At least one --grant is required');
    }
    return {
      kind: 'runtime-host-access-issue',
      ...(rootPath ? { rootPath } : {}),
      ...(expectedRootId ? { expectedRootId } : {}),
      principalKind,
      principalId,
      operationGrants,
      canPublishClientCapabilities,
      canUseHostPaths,
      ...(capabilityOwnerCredentialId ? { capabilityOwnerCredentialId } : {}),
    };
  }
  if (capabilityOwnerCredentialId) {
    return error('--capability-owner-credential is only valid for access issue');
  }
  if (!credentialId) return error('--credential is required');
  if (framed && !currentCredentialFingerprint) {
    return error('--current-fingerprint is required for framed access revoke');
  }
  if (currentCredentialFingerprint && !/^[a-f0-9]{32}$/u.test(currentCredentialFingerprint)) {
    return error('--current-fingerprint must be a Runtime Host credential fingerprint');
  }
  if (
    principalId ||
    principalKindSpecified ||
    operationGrants.length > 0 ||
    canPublishClientCapabilities ||
    canUseHostPaths ||
    preset ||
    name
  ) {
    return error('Issue-only access options are not valid for revoke');
  }
  return {
    kind: 'runtime-host-access-revoke',
    ...(rootPath ? { rootPath } : {}),
    ...(expectedRootId ? { expectedRootId } : {}),
    credentialId,
    ...(currentCredentialFingerprint ? { currentCredentialFingerprint } : {}),
    framed,
  };
}

function optionValue(argv: string[], index: number, option: string): string | RuntimeHostCliError {
  const value = argv[index + 1];
  return !value || value.startsWith('-') ? error(`${option} requires a value`) : value;
}

function error(message: string): RuntimeHostCliError {
  return { kind: 'error', message, exitCode: 2 };
}