fix(claude): implement official hook contract

AGENTS.md

@@ -26,6 +26,7 @@ This repository owns the published `@elydora/sdk` package, its `elydora` CLI, lo
 - Resolve Codex user hooks through `CODEX_HOME/hooks.json` with `~/.codex/hooks.json` as the default, matching Codex's existing-directory canonicalization rule. Preserve user TOML, project, plugin, and managed hook sources because Codex composes them additively. Register exact `PreToolUse` and `PostToolUse` matcher groups with ten-second command handlers, preserve the complete native payload, propagate freeze and revocation through exit code `2`, and keep guard lookup and audit delivery fail-open with observable errors. Commit Codex's user hooks, guard, audit runtime, runtime config, and private key through one rollback-capable transaction. Use `/hooks` to approve both definition hashes after installation.
 - Resolve stable Kimi hooks through `$KIMI_CODE_HOME/config.toml` with `~/.kimi-code/config.toml` as the default, and treat an empty override as the default. Activate `~/.kimi/config.toml` only when the legacy home exists. Register exact `PreToolUse`, `PostToolUse`, and `PostToolUseFailure` rules with ten-second commands; stable Kimi supports its current sixteen-event schema and legacy kimi-cli supports its thirteen-event schema. Preserve the native snake_case payload, propagate exit code `2`, and keep audit delivery fail-open with owner-only error logs. Use encoded PowerShell commands on Windows and exact two-argument shell commands on Unix. Commit every detected config, generated runtime, runtime config, and private key through one rollback-capable transaction.
 - Resolve Grok Build user hooks through `$GROK_HOME/hooks/*.json` with `~/.grok/hooks/*.json` as the default, and treat an empty override as the default. Keep Claude Code, Cursor, project `.grok/hooks`, plugin, and `hooks-paths` sources read-only. Register exact `PreToolUse`, `PostToolUse`, and `PostToolUseFailure` groups with ten-second command handlers, preserve the complete native camelCase payload, and emit Grok's documented deny JSON plus exit code `2` for frozen or revoked agents. Use encoded PowerShell commands on Windows and exact two-argument shell commands on Unix. Commit Grok's hook file, generated runtimes, runtime config, and private key through one rollback-capable transaction.
+- Resolve Claude Code user hooks through `$CLAUDE_CONFIG_DIR/settings.json` with `~/.claude/settings.json` when the variable is absent. Match Claude Code's path resolution exactly: relative and empty values resolve from the current working directory, and literal tildes remain path segments. Keep project, local, managed, plugin, skill, and agent hook sources read-only. Register exact matchless `PreToolUse`, `PostToolUse`, and `PostToolUseFailure` groups with ten-second exec-form command handlers. Preserve the complete native snake_case payload and propagate freeze and revocation through exit code `2`. Commit Claude Code's user settings, generated runtimes, runtime config, and private key through one rollback-capable transaction. Reject installation while the user source sets `disableAllHooks`, then require `/hooks` and `claude doctor` verification for higher-scope policy effects.
 - Write Auggie hooks only to `~/.augment/settings.json`; keep system and workspace settings read-only. Generate `.cmd` wrappers on Windows and `.sh` wrappers on Unix because Auggie dispatches supported script paths, and express hook timeouts in milliseconds.
 - Write Cline hooks only to `$CLINE_DIR/hooks` with `~/.cline/hooks` as the default; keep Documents and workspace hook roots read-only. Translate guard exit code `2` into Cline's JSON stdout cancellation control and preserve official hook input byte-for-byte.
 - Write Cursor hooks only to `~/.cursor/hooks.json`; keep project and enterprise sources read-only. Register `preToolUse`, `postToolUse`, and `postToolUseFailure`, preserve the complete native payload plus `conversation_id`, and emit valid JSON on successful hook execution. Commit Cursor's config, guard, audit runtime, runtime config, and private key through one rollback-capable transaction. Set a ten-second timeout plus `failClosed` on every managed handler and propagate guard exit code `2` through the host shell.

README.md

@@ -82,6 +82,8 @@ The CLI reads the private key and optional API token through hidden terminal pro
 | GitHub Copilot CLI | `copilot` |
 | Letta Code | `letta` |
 
+Claude Code installation writes exact matchless `PreToolUse`, `PostToolUse`, and `PostToolUseFailure` groups to `$CLAUDE_CONFIG_DIR/settings.json`, with `~/.claude/settings.json` selected when the variable is absent. Relative and empty overrides resolve from the current working directory, matching Claude Code's native path behavior. Each handler uses Claude Code's cross-platform exec form with the current Node.js executable, a single script argument, and a ten-second timeout. Managed runtimes preserve the complete native snake_case event payload and enforce frozen or revoked state through exit code `2`. Project, local, managed, plugin, skill, and agent hook sources remain unchanged and continue loading additively. User settings, generated runtimes, runtime config, and private key commit as one rollback-capable transaction. `disableAllHooks` blocks installation; managed hook policy and safe mode can suppress user hooks. Run `/hooks` and `claude doctor` after installation.
+
 Codex installation writes exact `PreToolUse` and `PostToolUse` command groups to `$CODEX_HOME/hooks.json` (`~/.codex/hooks.json` by default) and preserves the complete native event payload. A configured `CODEX_HOME` follows Codex's existing-directory canonicalization rule. User TOML, project, plugin, and managed sources remain unchanged and continue loading additively. The hook file, generated runtimes, runtime config, and private key commit as one rollback-capable update. Run `/hooks` after installation and approve both Elydora definition hashes.
 
 Cursor installation writes native `preToolUse`, `postToolUse`, and `postToolUseFailure` handlers to `~/.cursor/hooks.json` for both the CLI and IDE. Project and enterprise hook sources remain unchanged. The installation commits Cursor's hook file, generated runtimes, runtime config, and private key as one rollback-capable update. Managed commands use the current Node.js executable, preserve the complete Cursor JSON payload, return valid JSON, propagate freeze and revocation exit code `2`, and enable `failClosed` with a ten-second timeout.

src/plugins/claudecode-contract.ts

@@ -0,0 +1,409 @@
+import os from 'node:os';
+import path from 'node:path';
+import { isObject, parseStrictJsonObject, type JsonObject } from './strict-json.js';
+
+export const AGENT_KEY = 'claudecode';
+export const CONFIG_FILE = 'settings.json';
+export const GUARD_SCRIPT = 'guard.js';
+export const AUDIT_SCRIPT = 'hook.js';
+export const HOOK_TIMEOUT_SECONDS = 10;
+export const GUARD_STATUS = 'Checking Elydora agent state';
+export const AUDIT_STATUS = 'Recording Elydora tool use';
+
+const HOOK_EVENTS = new Set([
+  'SessionStart', 'Setup', 'InstructionsLoaded', 'UserPromptSubmit',
+  'UserPromptExpansion', 'MessageDisplay', 'PreToolUse', 'PermissionRequest',
+  'PostToolUse', 'PostToolUseFailure', 'PostToolBatch', 'PermissionDenied',
+  'Notification', 'SubagentStart', 'SubagentStop', 'TaskCreated', 'TaskCompleted',
+  'Stop', 'StopFailure', 'TeammateIdle', 'ConfigChange', 'CwdChanged',
+  'FileChanged', 'WorktreeCreate', 'WorktreeRemove', 'PreCompact', 'PostCompact',
+  'SessionEnd', 'Elicitation', 'ElicitationResult',
+]);
+
+const COMMON_HANDLER_KEYS = ['if', 'once', 'statusMessage', 'timeout'];
+const HANDLER_KEYS: Readonly<Record<string, readonly string[]>> = {
+  command: [...COMMON_HANDLER_KEYS, 'args', 'async', 'asyncRewake', 'command', 'shell', 'type'],
+  prompt: [...COMMON_HANDLER_KEYS, 'continueOnBlock', 'model', 'prompt', 'type'],
+  agent: [...COMMON_HANDLER_KEYS, 'model', 'prompt', 'type'],
+  http: [...COMMON_HANDLER_KEYS, 'allowedEnvVars', 'headers', 'type', 'url'],
+  mcp_tool: [...COMMON_HANDLER_KEYS, 'input', 'server', 'tool', 'type'],
+};
+
+export interface ClaudeHandler extends JsonObject {
+  readonly type: 'command' | 'prompt' | 'agent' | 'http' | 'mcp_tool';
+}
+
+export interface ClaudeGroup extends JsonObject {
+  readonly matcher?: string;
+  readonly hooks: ClaudeHandler[];
+}
+
+export type ClaudeHooks = Record<string, ClaudeGroup[]>;
+
+export interface ClaudeDocument {
+  readonly exists: boolean;
+  readonly filePath: string;
+  readonly root: JsonObject;
+  readonly hooks: ClaudeHooks;
+  readonly hooksDisabled: boolean;
+  readonly raw?: string;
+}
+
+export interface RenderedClaudeDocument {
+  readonly document: ClaudeDocument;
+  readonly changed: boolean;
+  readonly next?: string;
+}
+
+export interface ClaudeRuntimeContract {
+  readonly agentId: string;
+  readonly guardPath: string;
+  readonly auditPath: string;
+}
+
+interface RuntimeReference {
+  readonly agentId: string;
+  readonly scriptPath: string;
+}
+
+function samePath(left: string, right: string): boolean {
+  const normalizedLeft = path.resolve(left);
+  const normalizedRight = path.resolve(right);
+  return process.platform === 'win32'
+    ? normalizedLeft.toLowerCase() === normalizedRight.toLowerCase()
+    : normalizedLeft === normalizedRight;
+}
+
+function sameAgentId(left: string, right: string): boolean {
+  return process.platform === 'win32'
+    ? left.toLowerCase() === right.toLowerCase()
+    : left === right;
+}
+
+function requireKnownKeys(value: JsonObject, allowed: readonly string[], label: string): void {
+  const keys = new Set(allowed);
+  const extra = Object.keys(value).find((key) => !keys.has(key));
+  if (extra) throw new Error(`${label} contains unsupported field "${extra}"`);
+}
+
+function requireNonEmptyString(value: unknown, field: string, label: string): string {
+  if (typeof value !== 'string' || value.length === 0) {
+    throw new Error(`${label} field "${field}" must be a non-empty string`);
+  }
+  return value;
+}
+
+function optionalString(value: JsonObject, field: string, label: string): void {
+  if (value[field] !== undefined && typeof value[field] !== 'string') {
+    throw new Error(`${label} field "${field}" must be a string`);
+  }
+}
+
+function optionalBoolean(value: JsonObject, field: string, label: string): void {
+  if (value[field] !== undefined && typeof value[field] !== 'boolean') {
+    throw new Error(`${label} field "${field}" must be a boolean`);
+  }
+}
+
+function validateCommonHandlerFields(value: JsonObject, label: string): void {
+  optionalString(value, 'if', label);
+  optionalString(value, 'statusMessage', label);
+  optionalBoolean(value, 'once', label);
+  if (value.timeout !== undefined && (
+    typeof value.timeout !== 'number'
+    || !Number.isFinite(value.timeout)
+    || value.timeout <= 0
+  )) {
+    throw new Error(`${label} timeout must be a positive finite number`);
+  }
+}
+
+function validateStringArray(value: unknown, field: string, label: string): string[] {
+  if (!Array.isArray(value) || value.some((item) => typeof item !== 'string')) {
+    throw new Error(`${label} field "${field}" must be an array of strings`);
+  }
+  return value as string[];
+}
+
+function validateHandler(value: unknown, event: string, group: number, index: number): ClaudeHandler {
+  const label = `Claude Code settings handler hooks.${event}[${group}].hooks[${index}]`;
+  if (!isObject(value)) throw new Error(`${label} must be an object`);
+  if (typeof value.type !== 'string' || !HANDLER_KEYS[value.type]) {
+    throw new Error(`${label} has unsupported type "${String(value.type)}"`);
+  }
+  requireKnownKeys(value, HANDLER_KEYS[value.type], label);
+  validateCommonHandlerFields(value, label);
+  if (value.type === 'command') {
+    requireNonEmptyString(value.command, 'command', label);
+    if (value.args !== undefined) validateStringArray(value.args, 'args', label);
+    optionalBoolean(value, 'async', label);
+    optionalBoolean(value, 'asyncRewake', label);
+    if (value.shell !== undefined && value.shell !== 'bash' && value.shell !== 'powershell') {
+      throw new Error(`${label} field "shell" must be "bash" or "powershell"`);
+    }
+  } else if (value.type === 'prompt' || value.type === 'agent') {
+    requireNonEmptyString(value.prompt, 'prompt', label);
+    optionalString(value, 'model', label);
+    if (value.type === 'prompt') optionalBoolean(value, 'continueOnBlock', label);
+  } else if (value.type === 'http') {
+    const rawUrl = requireNonEmptyString(value.url, 'url', label);
+    let url: URL;
+    try {
+      url = new URL(rawUrl);
+    } catch (error) {
+      throw new Error(`${label} field "url" must be a valid URL`, {
+        cause: error instanceof Error ? error : new Error(String(error)),
+      });
+    }
+    if (!['http:', 'https:'].includes(url.protocol) || !url.hostname) {
+      throw new Error(`${label} field "url" must use HTTP or HTTPS`);
+    }
+    if (value.headers !== undefined && (
+      !isObject(value.headers)
+      || Object.values(value.headers).some((item) => typeof item !== 'string')
+    )) {
+      throw new Error(`${label} field "headers" must map names to strings`);
+    }
+    if (value.allowedEnvVars !== undefined) {
+      const allowedEnvVars = validateStringArray(value.allowedEnvVars, 'allowedEnvVars', label);
+      if (allowedEnvVars.some((item) => item.length === 0)) {
+        throw new Error(`${label} field "allowedEnvVars" must contain non-empty strings`);
+      }
+    }
+  } else {
+    requireNonEmptyString(value.server, 'server', label);
+    requireNonEmptyString(value.tool, 'tool', label);
+    if (value.input !== undefined && !isObject(value.input)) {
+      throw new Error(`${label} field "input" must be an object`);
+    }
+  }
+  return value as ClaudeHandler;
+}
+
+function validateGroup(value: unknown, event: string, index: number): ClaudeGroup {
+  const label = `Claude Code settings matcher group hooks.${event}[${index}]`;
+  if (!isObject(value)) throw new Error(`${label} must be an object`);
+  requireKnownKeys(value, ['hooks', 'matcher'], label);
+  if (value.matcher !== undefined) {
+    if (typeof value.matcher !== 'string') throw new Error(`${label} matcher must be a string`);
+  }
+  if (!Array.isArray(value.hooks)) throw new Error(`${label} must contain a hooks array`);
+  return {
+    ...value,
+    hooks: value.hooks.map((handler, handlerIndex) => (
+      validateHandler(handler, event, index, handlerIndex)
+    )),
+  } as ClaudeGroup;
+}
+
+function readHooks(value: unknown): ClaudeHooks {
+  if (value === undefined) return {};
+  if (!isObject(value)) throw new Error('Claude Code settings field "hooks" must be an object');
+  const hooks: ClaudeHooks = {};
+  for (const [event, groups] of Object.entries(value)) {
+    if (!HOOK_EVENTS.has(event)) {
+      throw new Error(`Claude Code settings contains unsupported hook event "${event}"`);
+    }
+    if (!Array.isArray(groups)) {
+      throw new Error(`Claude Code settings field "hooks.${event}" must be an array`);
+    }
+    hooks[event] = groups.map((group, index) => validateGroup(group, event, index));
+  }
+  return hooks;
+}
+
+export function parseClaudeDocument(filePath: string, raw: string): ClaudeDocument {
+  const root = parseStrictJsonObject(raw, `Claude Code user settings at ${filePath}`);
+  if (root.disableAllHooks !== undefined && typeof root.disableAllHooks !== 'boolean') {
+    throw new Error('Claude Code settings field "disableAllHooks" must be a boolean');
+  }
+  return {
+    exists: true,
+    filePath,
+    root,
+    hooks: readHooks(root.hooks),
+    hooksDisabled: root.disableAllHooks === true,
+    raw,
+  };
+}
+
+export function createClaudeDocument(filePath: string): ClaudeDocument {
+  return { exists: false, filePath, root: {}, hooks: {}, hooksDisabled: false };
+}
+
+export function buildClaudeGroup(scriptPath: string, statusMessage: string): ClaudeGroup {
+  return {
+    hooks: [{
+      type: 'command',
+      command: process.execPath,
+      args: [scriptPath],
+      timeout: HOOK_TIMEOUT_SECONDS,
+      statusMessage,
+    }],
+  };
+}
+
+function exactManagedGroup(group: ClaudeGroup): boolean {
+  return Object.keys(group).length === 1 && Object.hasOwn(group, 'hooks');
+}
+
+function runtimeReference(scriptPath: string, scriptName: string): RuntimeReference | undefined {
+  if (!path.isAbsolute(scriptPath) || path.basename(scriptPath) !== scriptName) return undefined;
+  const agentDirectory = path.dirname(scriptPath);
+  if (!samePath(path.dirname(agentDirectory), path.join(os.homedir(), '.elydora'))) return undefined;
+  const agentId = path.basename(agentDirectory);
+  return agentId && agentId !== '.' && agentId !== '..' ? { agentId, scriptPath } : undefined;
+}
+
+function managedReference(
+  handler: ClaudeHandler,
+  scriptName: string,
+  statusMessage: string,
+  includeLegacy = false,
+): RuntimeReference | undefined {
+  const keys = Object.keys(handler).sort().join('|');
+  if (keys === 'args|command|statusMessage|timeout|type'
+    && handler.type === 'command'
+    && handler.timeout === HOOK_TIMEOUT_SECONDS
+    && handler.statusMessage === statusMessage
+    && typeof handler.command === 'string'
+    && samePath(handler.command, process.execPath)
+    && Array.isArray(handler.args)
+    && handler.args.length === 1
+    && typeof handler.args[0] === 'string') {
+    return runtimeReference(handler.args[0], scriptName);
+  }
+  if (!includeLegacy || keys !== 'command|type' || handler.type !== 'command') return undefined;
+  const match = typeof handler.command === 'string'
+    ? /^node "([^"\r\n]+)"$/.exec(handler.command)
+    : undefined;
+  return match ? runtimeReference(match[1], scriptName) : undefined;
+}
+
+function removeFromGroups(
+  groups: readonly ClaudeGroup[],
+  scriptName: string,
+  statusMessage: string,
+  agentId?: string,
+): { groups: ClaudeGroup[]; removed: boolean } {
+  const result: ClaudeGroup[] = [];
+  let removed = false;
+  for (const group of groups) {
+    const handlers = group.hooks.filter((handler) => {
+      const reference = managedReference(handler, scriptName, statusMessage, true);
+      const owned = reference !== undefined
+        && (agentId === undefined || sameAgentId(reference.agentId, agentId));
+      if (owned) removed = true;
+      return !owned;
+    });
+    if (handlers.length > 0) result.push({ ...group, hooks: handlers });
+    else if (!exactManagedGroup(group)) result.push({ ...group, hooks: [] });
+  }
+  return { groups: result, removed };
+}
+
+export function removeManagedClaudeHooks(hooks: ClaudeHooks, agentId?: string): ClaudeHooks {
+  const next: ClaudeHooks = Object.fromEntries(
+    Object.entries(hooks).map(([event, groups]) => [event, [...groups]]),
+  );
+  for (const [event, scriptName, statusMessage] of [
+    ['PreToolUse', GUARD_SCRIPT, GUARD_STATUS],
+    ['PostToolUse', AUDIT_SCRIPT, AUDIT_STATUS],
+    ['PostToolUseFailure', AUDIT_SCRIPT, AUDIT_STATUS],
+  ] as const) {
+    if (!next[event]) continue;
+    const result = removeFromGroups(next[event], scriptName, statusMessage, agentId);
+    if (!result.removed) continue;
+    if (result.groups.length > 0) next[event] = result.groups;
+    else delete next[event];
+  }
+  return next;
+}
+
+function managedEvent(event: string): readonly [string, string] | undefined {
+  if (event === 'PreToolUse') return [GUARD_SCRIPT, GUARD_STATUS];
+  if (event === 'PostToolUse' || event === 'PostToolUseFailure') {
+    return [AUDIT_SCRIPT, AUDIT_STATUS];
+  }
+  return undefined;
+}
+
+function entirelyManaged(document: ClaudeDocument): boolean {
+  if (!document.exists || !Object.keys(document.root).every((key) => key === 'hooks')) return false;
+  const events = Object.entries(document.hooks);
+  if (events.length === 0) return false;
+  let handlers = 0;
+  for (const [event, groups] of events) {
+    const contract = managedEvent(event);
+    if (!contract || groups.length === 0) return false;
+    for (const group of groups) {
+      if (!exactManagedGroup(group)
+        || group.hooks.length === 0
+        || group.hooks.some((handler) => (
+          !managedReference(handler, contract[0], contract[1], true)
+        ))) return false;
+      handlers += group.hooks.length;
+    }
+  }
+  return handlers > 0;
+}
+
+export function renderClaudeDocument(
+  document: ClaudeDocument,
+  hooks: ClaudeHooks,
+): RenderedClaudeDocument {
+  if (!document.exists && Object.keys(hooks).length === 0) {
+    return { document, changed: false };
+  }
+  if (Object.keys(hooks).length === 0 && entirelyManaged(document)) {
+    return { document, changed: true };
+  }
+  const root: JsonObject = { ...document.root };
+  if (Object.keys(hooks).length > 0) root.hooks = hooks;
+  else delete root.hooks;
+  const next = `${JSON.stringify(root, null, 2)}\n`;
+  return { document, changed: next !== document.raw, next };
+}
+
+function referencesForEvent(
+  groups: readonly ClaudeGroup[],
+  scriptName: string,
+  statusMessage: string,
+): Map<string, RuntimeReference[]> {
+  const references = new Map<string, RuntimeReference[]>();
+  for (const group of groups) {
+    if (!exactManagedGroup(group)) continue;
+    for (const handler of group.hooks) {
+      const reference = managedReference(handler, scriptName, statusMessage);
+      if (!reference) continue;
+      const key = process.platform === 'win32'
+        ? reference.agentId.toLowerCase()
+        : reference.agentId;
+      references.set(key, [...(references.get(key) ?? []), reference]);
+    }
+  }
+  return references;
+}
+
+export function claudeRuntimeContracts(hooks: ClaudeHooks): ClaudeRuntimeContract[] {
+  const guards = referencesForEvent(hooks.PreToolUse ?? [], GUARD_SCRIPT, GUARD_STATUS);
+  const successes = referencesForEvent(hooks.PostToolUse ?? [], AUDIT_SCRIPT, AUDIT_STATUS);
+  const failures = referencesForEvent(
+    hooks.PostToolUseFailure ?? [],
+    AUDIT_SCRIPT,
+    AUDIT_STATUS,
+  );
+  const contracts: ClaudeRuntimeContract[] = [];
+  for (const [key, guard] of guards) {
+    const success = successes.get(key);
+    const failure = failures.get(key);
+    if (guard.length !== 1 || success?.length !== 1 || failure?.length !== 1) continue;
+    if (!samePath(success[0].scriptPath, failure[0].scriptPath)) continue;
+    contracts.push({
+      agentId: guard[0].agentId,
+      guardPath: guard[0].scriptPath,
+      auditPath: success[0].scriptPath,
+    });
+  }
+  return contracts;
+}

src/plugins/claudecode-installation.ts

@@ -0,0 +1,70 @@
+import type { InstallConfig } from './base.js';
+import {
+  AGENT_KEY,
+  AUDIT_SCRIPT,
+  GUARD_SCRIPT,
+  type RenderedClaudeDocument,
+} from './claudecode-contract.js';
+import {
+  commitManagedInstallation,
+  managedRuntimePaths,
+  preflightManagedInstallation,
+  prepareManagedInstallation,
+  type ManagedRuntimePaths,
+  type PreparedManagedInstallation,
+  type RenameFile,
+} from './managed-installation.js';
+
+const DISPLAY_NAME = 'Claude Code';
+const SETTINGS_DIRECTORY_LABEL = 'Claude Code configuration directory';
+const SETTINGS_LABEL = 'Claude Code user settings';
+
+export type ClaudeRuntimePaths = ManagedRuntimePaths;
+export type PreparedClaudeInstallation = PreparedManagedInstallation;
+export type { RenameFile };
+
+export function claudeRuntimePaths(config: InstallConfig): ClaudeRuntimePaths {
+  return managedRuntimePaths(config, AGENT_KEY, GUARD_SCRIPT, AUDIT_SCRIPT);
+}
+
+export async function preflightClaudeInstallation(
+  config: InstallConfig,
+  settingsPath: string,
+): Promise<ClaudeRuntimePaths> {
+  return preflightManagedInstallation({
+    agentKey: AGENT_KEY,
+    hookLocations: [{ directoryLabel: SETTINGS_DIRECTORY_LABEL, filePath: settingsPath }],
+    config,
+  }, GUARD_SCRIPT, AUDIT_SCRIPT);
+}
+
+export async function prepareClaudeInstallation(
+  config: InstallConfig,
+  rendered: RenderedClaudeDocument,
+): Promise<PreparedClaudeInstallation> {
+  if (!rendered.changed && rendered.document.raw === undefined) {
+    throw new Error('Claude Code hook installation did not produce a settings document');
+  }
+  const settingsSource = rendered.next ?? rendered.document.raw;
+  if (settingsSource === undefined) throw new Error('Claude Code hook settings are missing');
+  return prepareManagedInstallation({
+    agentKey: AGENT_KEY,
+    displayName: DISPLAY_NAME,
+    hookSources: [{
+      directoryLabel: SETTINGS_DIRECTORY_LABEL,
+      label: SETTINGS_LABEL,
+      filePath: rendered.document.filePath,
+      expectedSource: rendered.document.raw,
+      source: settingsSource,
+    }],
+    config,
+    auditOptions: { nativePayload: true },
+  }, GUARD_SCRIPT, AUDIT_SCRIPT);
+}
+
+export async function commitClaudeInstallation(
+  prepared: PreparedClaudeInstallation,
+  renameFile?: RenameFile,
+): Promise<void> {
+  await commitManagedInstallation(prepared, renameFile);
+}

src/plugins/claudecode-io.ts

@@ -0,0 +1,153 @@
+import os from 'node:os';
+import path from 'node:path';
+import {
+  AGENT_KEY,
+  CONFIG_FILE,
+  createClaudeDocument,
+  parseClaudeDocument,
+  type ClaudeDocument,
+  type ClaudeRuntimeContract,
+  type RenderedClaudeDocument,
+} from './claudecode-contract.js';
+import { inspectPhysicalDirectory, readPhysicalFile } from './managed-files.js';
+import {
+  commitManagedTransaction,
+  prepareManagedFileChange,
+} from './managed-transaction.js';
+import { parseStrictJsonObject, type JsonObject } from './strict-json.js';
+
+export function claudeConfigDirectory(): string {
+  const configured = process.env.CLAUDE_CONFIG_DIR;
+  return configured === undefined
+    ? path.join(os.homedir(), '.claude')
+    : path.resolve(configured);
+}
+
+export function claudeSettingsPath(): string {
+  return path.join(claudeConfigDirectory(), CONFIG_FILE);
+}
+
+export async function readClaudeDocument(): Promise<ClaudeDocument> {
+  const filePath = claudeSettingsPath();
+  await inspectPhysicalDirectory(path.dirname(filePath), 'Claude Code configuration directory');
+  const snapshot = await readPhysicalFile(filePath, 'Claude Code user settings');
+  return snapshot
+    ? parseClaudeDocument(filePath, snapshot.contents)
+    : createClaudeDocument(filePath);
+}
+
+export async function writeClaudeDocument(rendered: RenderedClaudeDocument): Promise<void> {
+  if (!rendered.changed) return;
+  const change = await prepareManagedFileChange({
+    filePath: rendered.document.filePath,
+    label: 'Claude Code user settings',
+    next: rendered.next,
+    mode: 0o600,
+    expectedSource: rendered.document.raw,
+    verifyExpectedSource: true,
+  });
+  if (!change) return;
+  await commitManagedTransaction({
+    displayName: 'Claude Code',
+    operation: 'uninstall',
+    directories: [{
+      path: path.dirname(rendered.document.filePath),
+      label: 'Claude Code configuration directory',
+    }],
+    changes: [change],
+  });
+}
+
+function requireNonEmptyString(value: unknown, field: string, configPath: string): string {
+  if (typeof value !== 'string' || value.trim().length === 0) {
+    throw new Error(`Elydora runtime config ${field} is invalid: ${configPath}`);
+  }
+  return value;
+}
+
+function sameAgentId(left: string, right: string): boolean {
+  return process.platform === 'win32'
+    ? left.toLowerCase() === right.toLowerCase()
+    : left === right;
+}
+
+function samePath(left: string, right: string): boolean {
+  const normalizedLeft = path.resolve(left);
+  const normalizedRight = path.resolve(right);
+  return process.platform === 'win32'
+    ? normalizedLeft.toLowerCase() === normalizedRight.toLowerCase()
+    : normalizedLeft === normalizedRight;
+}
+
+function validateRuntimeConfig(
+  config: JsonObject,
+  contract: ClaudeRuntimeContract,
+  configPath: string,
+): void {
+  const supported = new Set(['org_id', 'agent_id', 'kid', 'base_url', 'token', 'agent_name']);
+  const extra = Object.keys(config).find((key) => !supported.has(key));
+  if (extra) throw new Error(`Elydora runtime config has unsupported field "${extra}": ${configPath}`);
+  requireNonEmptyString(config.org_id, 'org_id', configPath);
+  requireNonEmptyString(config.kid, 'kid', configPath);
+  const agentId = requireNonEmptyString(config.agent_id, 'agent_id', configPath);
+  if (!sameAgentId(agentId, contract.agentId) || config.agent_name !== AGENT_KEY) {
+    throw new Error(`Elydora runtime identity does not match Claude Code hooks: ${configPath}`);
+  }
+  if (config.token !== undefined) requireNonEmptyString(config.token, 'token', configPath);
+  const rawBaseUrl = requireNonEmptyString(config.base_url, 'base_url', configPath);
+  let baseUrl: URL;
+  try {
+    baseUrl = new URL(rawBaseUrl);
+  } catch (error) {
+    throw new Error(`Elydora runtime config base_url is invalid: ${configPath}`, {
+      cause: error instanceof Error ? error : new Error(String(error)),
+    });
+  }
+  if (!['http:', 'https:'].includes(baseUrl.protocol)
+    || !baseUrl.hostname
+    || baseUrl.username
+    || baseUrl.password
+    || baseUrl.search
+    || baseUrl.hash) {
+    throw new Error(`Elydora runtime config base_url is invalid: ${configPath}`);
+  }
+}
+
+function validatePrivateKey(contents: string, keyPath: string): void {
+  const bytes = Buffer.from(contents, 'base64url');
+  if (bytes.length !== 32 || bytes.toString('base64url') !== contents) {
+    throw new Error(`Elydora private key is invalid: ${keyPath}`);
+  }
+}
+
+async function runtimeContractExists(contract: ClaudeRuntimeContract): Promise<boolean> {
+  const runtimeRoot = path.join(os.homedir(), '.elydora');
+  const agentDirectory = path.dirname(contract.guardPath);
+  if (!samePath(path.dirname(agentDirectory), runtimeRoot)
+    || !samePath(contract.auditPath, path.join(agentDirectory, 'hook.js'))) return false;
+  if (!await inspectPhysicalDirectory(runtimeRoot, 'Elydora runtime directory')) return false;
+  if (!await inspectPhysicalDirectory(agentDirectory, 'Elydora agent runtime directory')) return false;
+
+  const configPath = path.join(agentDirectory, 'config.json');
+  const keyPath = path.join(agentDirectory, 'private.key');
+  const [config, key, guard, audit] = await Promise.all([
+    readPhysicalFile(configPath, 'Elydora runtime config'),
+    readPhysicalFile(keyPath, 'Elydora private key'),
+    readPhysicalFile(contract.guardPath, 'Elydora guard runtime'),
+    readPhysicalFile(contract.auditPath, 'Elydora audit runtime'),
+  ]);
+  if (!config || !key || !guard || !audit) return false;
+  const parsed = parseStrictJsonObject(config.contents, `Elydora runtime config at ${configPath}`);
+  validateRuntimeConfig(parsed, contract, configPath);
+  validatePrivateKey(key.contents, keyPath);
+  return guard.contents.length > 0 && audit.contents.length > 0;
+}
+
+export async function claudeRuntimeFilesExist(
+  contracts: readonly ClaudeRuntimeContract[],
+): Promise<boolean> {
+  for (const contract of contracts) {
+    if (await runtimeContractExists(contract)) return true;
+  }
+  return false;
+}

src/plugins/claudecode.ts

@@ -1,171 +1,86 @@
-import fsp from 'node:fs/promises';
-import path from 'node:path';
-import os from 'node:os';
 import type { AgentPlugin, InstallConfig, PluginStatus } from './base.js';
+import {
+  AGENT_KEY,
+  AUDIT_STATUS,
+  GUARD_STATUS,
+  buildClaudeGroup,
+  claudeRuntimeContracts,
+  removeManagedClaudeHooks,
+  renderClaudeDocument,
+} from './claudecode-contract.js';
+import {
+  commitClaudeInstallation,
+  preflightClaudeInstallation,
+  prepareClaudeInstallation,
+} from './claudecode-installation.js';
+import {
+  claudeRuntimeFilesExist,
+  readClaudeDocument,
+  writeClaudeDocument,
+} from './claudecode-io.js';
 import { SUPPORTED_AGENTS } from './registry.js';
 
-const AGENT_KEY = 'claudecode';
 const entry = SUPPORTED_AGENTS.get(AGENT_KEY)!;
 
-function resolveConfigDir(): string {
+function requireEnabledHooks(disabled: boolean, filePath: string): void {
-  return entry.configDir.replace(/^~/, os.homedir());
+  if (disabled) {
-}
+    throw new Error(`Claude Code hooks are disabled by disableAllHooks: ${filePath}`);
-
-function resolveConfigPath(): string {
-  return path.join(resolveConfigDir(), entry.configFile);
-}
-
-function buildHookCommand(scriptPath: string): string {
-  return `node "${scriptPath}"`;
-}
-
-function isElydoraCommand(cmd: string, agentId?: string): boolean {
-  if (!cmd.includes('elydora')) return false;
-  if (agentId) {
-    return cmd.includes(agentId);
   }
-  return true;
-}
-
-function filterElydoraEntries(arr: Array<Record<string, unknown>>, agentId?: string): Array<Record<string, unknown>> {
-  return arr.filter((entry) => {
-    if (Array.isArray(entry.hooks)) {
-      const cmds = entry.hooks as Array<Record<string, unknown>>;
-      return !cmds.some((h) => typeof h.command === 'string' && isElydoraCommand(h.command, agentId));
-    }
-    if (typeof entry.command === 'string') {
-      return !isElydoraCommand(entry.command, agentId);
-    }
-    return true;
-  });
 }
 
 export const claudecodePlugin: AgentPlugin = {
+  managesRuntime: true,
+
+  async preflightInstall(config: InstallConfig): Promise<void> {
+    const document = await readClaudeDocument();
+    requireEnabledHooks(document.hooksDisabled, document.filePath);
+    await preflightClaudeInstallation(config, document.filePath);
+  },
+
   async install(config: InstallConfig): Promise<void> {
-    const configDir = resolveConfigDir();
+    const document = await readClaudeDocument();
-    await fsp.mkdir(configDir, { recursive: true });
+    requireEnabledHooks(document.hooksDisabled, document.filePath);
-
+    const paths = await preflightClaudeInstallation(config, document.filePath);
-    const configPath = resolveConfigPath();
+    const hooks = removeManagedClaudeHooks(document.hooks);
-    let settings: Record<string, unknown> = {};
+    hooks.PreToolUse = [
-
+      ...(hooks.PreToolUse ?? []),
-    try {
+      buildClaudeGroup(paths.guardPath, GUARD_STATUS),
-      const raw = await fsp.readFile(configPath, 'utf-8');
+    ];
-      settings = JSON.parse(raw);
+    hooks.PostToolUse = [
-    } catch {
+      ...(hooks.PostToolUse ?? []),
-      // File doesn't exist or isn't valid JSON — start fresh
+      buildClaudeGroup(paths.auditPath, AUDIT_STATUS),
-    }
+    ];
-
+    hooks.PostToolUseFailure = [
-    if (!settings.hooks || typeof settings.hooks !== 'object') {
+      ...(hooks.PostToolUseFailure ?? []),
-      settings.hooks = {};
+      buildClaudeGroup(paths.auditPath, AUDIT_STATUS),
-    }
+    ];
-    const hooks = settings.hooks as Record<string, unknown>;
+    const rendered = renderClaudeDocument(document, hooks);
-
+    const prepared = await prepareClaudeInstallation(config, rendered);
-    // --- PreToolUse (guard — freeze enforcement) ---
+    await commitClaudeInstallation(prepared);
-    if (!Array.isArray(hooks.PreToolUse)) {
+    console.log(`  Claude Code hooks: ${document.filePath}`);
-      hooks.PreToolUse = [];
+    console.log('  Claude Code verification: run /hooks and claude doctor.');
-    }
-    const preFiltered = filterElydoraEntries(hooks.PreToolUse as Array<Record<string, unknown>>);
-    preFiltered.push({
-      hooks: [{ type: 'command', command: buildHookCommand(config.guardScriptPath) }],
-    });
-    hooks.PreToolUse = preFiltered;
-
-    // --- PostToolUse (audit logging) ---
-    if (!Array.isArray(hooks.PostToolUse)) {
-      hooks.PostToolUse = [];
-    }
-    const postFiltered = filterElydoraEntries(hooks.PostToolUse as Array<Record<string, unknown>>);
-    postFiltered.push({
-      hooks: [{ type: 'command', command: buildHookCommand(config.hookScriptPath) }],
-    });
-    hooks.PostToolUse = postFiltered;
-
-    settings.hooks = hooks;
-    await fsp.writeFile(configPath, JSON.stringify(settings, null, 2) + '\n', 'utf-8');
   },
 
   async uninstall(agentId?: string): Promise<void> {
-    const configPath = resolveConfigPath();
+    const document = await readClaudeDocument();
-
+    const hooks = removeManagedClaudeHooks(document.hooks, agentId);
-    let settings: Record<string, unknown>;
+    await writeClaudeDocument(renderClaudeDocument(document, hooks));
-    try {
-      const raw = await fsp.readFile(configPath, 'utf-8');
-      settings = JSON.parse(raw);
-    } catch {
-      return; // Nothing to uninstall
-    }
-
-    const hooks = settings.hooks as Record<string, unknown> | undefined;
-    if (!hooks) return;
-
-    if (Array.isArray(hooks.PreToolUse)) {
-      hooks.PreToolUse = filterElydoraEntries(hooks.PreToolUse as Array<Record<string, unknown>>, agentId);
-    }
-    if (Array.isArray(hooks.PostToolUse)) {
-      hooks.PostToolUse = filterElydoraEntries(hooks.PostToolUse as Array<Record<string, unknown>>, agentId);
-    }
-
-    await fsp.writeFile(configPath, JSON.stringify(settings, null, 2) + '\n', 'utf-8');
   },
 
   async status(): Promise<PluginStatus> {
-    const configPath = resolveConfigPath();
+    const document = await readClaudeDocument();
-
+    const contracts = claudeRuntimeContracts(document.hooks);
-    let hookConfigured = false;
+    const hookConfigured = !document.hooksDisabled && contracts.length > 0;
-    let hookScriptPath = '';
+    const hookScriptExists = hookConfigured
-    try {
+      ? await claudeRuntimeFilesExist(contracts)
-      const raw = await fsp.readFile(configPath, 'utf-8');
+      : false;
-      const settings = JSON.parse(raw);
-      const hooks = settings.hooks as Record<string, unknown> | undefined;
-      if (hooks) {
-        const checkArr = (arr: unknown) => {
-          if (!Array.isArray(arr)) return false;
-          return (arr as Array<Record<string, unknown>>).some((entry) => {
-            if (Array.isArray(entry.hooks)) {
-              return (entry.hooks as Array<Record<string, unknown>>).some(
-                (h) => typeof h.command === 'string' && h.command.includes('elydora'),
-              );
-            }
-            return typeof entry.command === 'string' && entry.command.includes('elydora');
-          });
-        };
-        hookConfigured = checkArr(hooks.PreToolUse) && checkArr(hooks.PostToolUse);
-
-        // Extract hook script path from PostToolUse command
-        if (hookConfigured && Array.isArray(hooks.PostToolUse)) {
-          for (const e of hooks.PostToolUse as Array<Record<string, unknown>>) {
-            if (Array.isArray(e.hooks)) {
-              for (const h of e.hooks as Array<Record<string, unknown>>) {
-                const cmd = h.command as string;
-                if (cmd && cmd.includes('elydora')) {
-                  hookScriptPath = cmd.replace(/^node\s+"?/, '').replace(/"?\s*$/, '');
-                }
-              }
-            }
-          }
-        }
-      }
-    } catch {
-      // Config not readable
-    }
-
-    let hookScriptExists = false;
-    if (hookScriptPath) {
-      try {
-        await fsp.access(hookScriptPath);
-        hookScriptExists = true;
-      } catch {
-        // File doesn't exist
-      }
-    }
-
     return {
       installed: hookConfigured && hookScriptExists,
       agentName: AGENT_KEY,
       displayName: entry.name,
       hookConfigured,
       hookScriptExists,
-      configPath,
+      configPath: document.filePath,
     };
   },
 };

test-support/claudecode-test-helpers.mjs

@@ -0,0 +1,206 @@
+import assert from 'node:assert/strict';
+import { spawn } from 'node:child_process';
+import { mkdir, mkdtemp, readFile, rm, writeFile } from 'node:fs/promises';
+import http from 'node:http';
+import os from 'node:os';
+import path from 'node:path';
+import { pathToFileURL } from 'node:url';
+
+export const VALID_PRIVATE_KEY = Buffer.alloc(32).toString('base64url');
+export const pluginModuleUrl = pathToFileURL(path.resolve('dist/plugins/claudecode.js')).href;
+export const registryModuleUrl = pathToFileURL(path.resolve('dist/plugins/registry.js')).href;
+export const ioModuleUrl = pathToFileURL(path.resolve('dist/plugins/claudecode-io.js')).href;
+export const installationModuleUrl = pathToFileURL(
+  path.resolve('dist/plugins/claudecode-installation.js'),
+).href;
+export const cliPath = path.resolve('dist/cli.js');
+
+export function runProcess(command, args, env, cwd, input = '', unset = []) {
+  return new Promise((resolve, reject) => {
+    const childEnv = { ...process.env, ...env };
+    for (const key of unset) delete childEnv[key];
+    const child = spawn(command, args, {
+      cwd,
+      env: childEnv,
+      stdio: ['pipe', 'pipe', 'pipe'],
+      windowsHide: true,
+    });
+    let stdout = '';
+    let stderr = '';
+    child.stdout.on('data', (chunk) => { stdout += chunk; });
+    child.stderr.on('data', (chunk) => { stderr += chunk; });
+    child.once('error', reject);
+    child.once('close', (code) => resolve({ code, stdout, stderr }));
+    child.stdin.end(input);
+  });
+}
+
+export function runNode(args, env, cwd, input = '', unset = []) {
+  return runProcess(process.execPath, args, env, cwd, input, unset);
+}
+
+export function runClaudeHook(handler, input, fixture, environment = {}) {
+  return runProcess(
+    handler.command,
+    handler.args,
+    {
+      HOME: fixture.homeDir,
+      USERPROFILE: fixture.homeDir,
+      CLAUDE_CONFIG_DIR: fixture.claudeConfigOverride ?? '',
+      ...environment,
+    },
+    fixture.projectDir,
+    input,
+  );
+}
+
+export async function writeJson(filePath, value) {
+  await mkdir(path.dirname(filePath), { recursive: true });
+  const contents = typeof value === 'string' ? value : `${JSON.stringify(value, null, 2)}\n`;
+  await writeFile(filePath, contents, { encoding: 'utf-8', mode: 0o600 });
+}
+
+export function installConfig(fixture, overrides = {}) {
+  return {
+    agentName: 'claudecode',
+    orgId: 'org-1',
+    agentId: 'agent-1',
+    privateKey: VALID_PRIVATE_KEY,
+    kid: 'kid-1',
+    token: 'token-1',
+    baseUrl: fixture.baseUrl,
+    guardScriptPath: fixture.guardScriptPath,
+    hookScriptPath: fixture.hookScriptPath,
+    ...overrides,
+  };
+}
+
+export async function runPlugin(fixture, method, argument, environment = {}) {
+  const source = `
+    import { claudecodePlugin } from ${JSON.stringify(pluginModuleUrl)};
+    const argument = JSON.parse(process.env.ELYDORA_TEST_ARGUMENT);
+    const result = await claudecodePlugin[process.env.ELYDORA_TEST_METHOD](argument);
+    if (result !== undefined) console.log(JSON.stringify(result));
+  `;
+  const env = {
+    HOME: fixture.homeDir,
+    USERPROFILE: fixture.homeDir,
+    ELYDORA_TEST_ARGUMENT: JSON.stringify(argument),
+    ELYDORA_TEST_METHOD: method,
+    ...environment,
+  };
+  const unset = [];
+  if (fixture.claudeConfigOverride === undefined) unset.push('CLAUDE_CONFIG_DIR');
+  else env.CLAUDE_CONFIG_DIR = fixture.claudeConfigOverride;
+  return runNode(
+    ['--input-type=module', '--eval', source],
+    env,
+    fixture.projectDir,
+    '',
+    unset,
+  );
+}
+
+export async function createFixture({
+  baseUrl = 'http://127.0.0.1:9',
+  settings,
+  explicitClaudeConfig = true,
+} = {}) {
+  const rootDir = await mkdtemp(path.join(os.tmpdir(), 'elydora-claude-'));
+  const homeDir = path.join(rootDir, "home with spaces and 'quote %CLAUDE_HOOK_EVENT%");
+  const projectDir = path.join(rootDir, 'project with spaces');
+  const claudeConfigDir = explicitClaudeConfig
+    ? path.join(homeDir, 'custom claude')
+    : path.join(homeDir, '.claude');
+  const settingsPath = path.join(claudeConfigDir, 'settings.json');
+  const agentDir = path.join(homeDir, '.elydora', 'agent-1');
+  const guardScriptPath = path.join(agentDir, 'guard.js');
+  const hookScriptPath = path.join(agentDir, 'hook.js');
+  await mkdir(projectDir, { recursive: true });
+  if (settings !== undefined) await writeJson(settingsPath, settings);
+  const fixture = {
+    agentDir,
+    baseUrl,
+    claudeConfigDir,
+    claudeConfigOverride: explicitClaudeConfig ? claudeConfigDir : undefined,
+    guardScriptPath,
+    homeDir,
+    hookScriptPath,
+    projectDir,
+    rootDir,
+    settingsPath,
+    install(overrides = {}) {
+      return runPlugin(this, 'install', installConfig(this, overrides));
+    },
+    async close() {
+      await rm(rootDir, { recursive: true, force: true });
+    },
+  };
+  return fixture;
+}
+
+export async function readSettings(filePath) {
+  const raw = await readFile(filePath, 'utf-8');
+  return { raw, settings: JSON.parse(raw) };
+}
+
+export function managedHandler(settings, event) {
+  for (const group of settings.hooks?.[event] ?? []) {
+    if (Object.keys(group).join('|') !== 'hooks' || !Array.isArray(group.hooks)) continue;
+    const handler = group.hooks.find((candidate) => (
+      Object.keys(candidate).sort().join('|') === 'args|command|statusMessage|timeout|type'
+      && candidate.type === 'command'
+      && candidate.timeout === 10
+    ));
+    if (handler) return handler;
+  }
+  return undefined;
+}
+
+export function assertManagedHandler(handler, scriptPath, statusMessage) {
+  assert(handler);
+  assert.deepEqual(
+    Object.keys(handler).sort(),
+    ['args', 'command', 'statusMessage', 'timeout', 'type'],
+  );
+  assert.equal(handler.type, 'command');
+  assert.equal(handler.command, process.execPath);
+  assert.deepEqual(handler.args, [scriptPath]);
+  assert.equal(handler.timeout, 10);
+  assert.equal(handler.statusMessage, statusMessage);
+}
+
+export function legacyHandler(scriptPath) {
+  return { type: 'command', command: `node "${scriptPath}"` };
+}
+
+export async function startApiServer({ status = 'active', operationStatus = 201 } = {}) {
+  const requests = [];
+  const server = http.createServer(async (request, response) => {
+    const chunks = [];
+    for await (const chunk of request) chunks.push(chunk);
+    const raw = Buffer.concat(chunks).toString('utf-8');
+    requests.push({ headers: request.headers, method: request.method, url: request.url, raw });
+    if (request.method === 'GET') {
+      response.writeHead(200, { 'Content-Type': 'application/json' });
+      response.end(JSON.stringify({ agent: { status } }));
+      return;
+    }
+    response.writeHead(operationStatus, { 'Content-Type': 'application/json' });
+    response.end(operationStatus >= 200 && operationStatus < 300
+      ? JSON.stringify({ operation: { accepted: true } })
+      : JSON.stringify({ error: { code: 'UPSTREAM_FAILURE', message: 'failed' } }));
+  });
+  await new Promise((resolve, reject) => {
+    server.once('error', reject);
+    server.listen(0, '127.0.0.1', resolve);
+  });
+  const address = server.address();
+  return {
+    baseUrl: `http://127.0.0.1:${address.port}`,
+    requests,
+    close: () => new Promise((resolve, reject) => {
+      server.close((error) => error ? reject(error) : resolve());
+    }),
+  };
+}

test/claudecode-official.test.mjs

@@ -0,0 +1,44 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  createFixture,
+  runProcess,
+} from '../test-support/claudecode-test-helpers.mjs';
+
+const claudeBinary = process.env.ELYDORA_CLAUDE_BINARY;
+
+test('official Claude Code accepts the installed user hook contract', {
+  skip: claudeBinary ? false : 'set ELYDORA_CLAUDE_BINARY to the official Claude Code executable',
+}, async () => {
+  const fixture = await createFixture();
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    const environment = {
+      HOME: fixture.homeDir,
+      USERPROFILE: fixture.homeDir,
+      CLAUDE_CONFIG_DIR: fixture.claudeConfigDir,
+      DISABLE_AUTOUPDATER: '1',
+      DISABLE_TELEMETRY: '1',
+    };
+    const version = await runProcess(
+      claudeBinary,
+      ['--version'],
+      environment,
+      fixture.projectDir,
+    );
+    assert.equal(version.code, 0, version.stderr);
+    assert.match(version.stdout, /Claude Code/i);
+
+    const doctor = await runProcess(
+      claudeBinary,
+      ['doctor'],
+      environment,
+      fixture.projectDir,
+    );
+    assert.equal(doctor.code, 0, doctor.stderr);
+    const output = `${doctor.stdout}\n${doctor.stderr}`;
+    assert.doesNotMatch(output, /invalid settings|settings validation|failed to parse/i);
+  } finally {
+    await fixture.close();
+  }
+});

test/claudecode-plugin.test.mjs

@@ -0,0 +1,368 @@
+import assert from 'node:assert/strict';
+import { lstat, mkdir, readFile, writeFile } from 'node:fs/promises';
+import path from 'node:path';
+import test from 'node:test';
+import {
+  assertManagedHandler,
+  cliPath,
+  createFixture,
+  legacyHandler,
+  managedHandler,
+  readSettings,
+  registryModuleUrl,
+  runNode,
+  runPlugin,
+  VALID_PRIVATE_KEY,
+  writeJson,
+} from '../test-support/claudecode-test-helpers.mjs';
+
+const GUARD_STATUS = 'Checking Elydora agent state';
+const AUDIT_STATUS = 'Recording Elydora tool use';
+
+async function assertMissing(filePath) {
+  await assert.rejects(lstat(filePath), { code: 'ENOENT' });
+}
+
+function assertManagedTriple(settings, fixture) {
+  assertManagedHandler(
+    managedHandler(settings, 'PreToolUse'),
+    fixture.guardScriptPath,
+    GUARD_STATUS,
+  );
+  assertManagedHandler(
+    managedHandler(settings, 'PostToolUse'),
+    fixture.hookScriptPath,
+    AUDIT_STATUS,
+  );
+  assertManagedHandler(
+    managedHandler(settings, 'PostToolUseFailure'),
+    fixture.hookScriptPath,
+    AUDIT_STATUS,
+  );
+}
+
+test('Claude Code is registered in the SDK and CLI', async () => {
+  const { SUPPORTED_AGENTS } = await import(registryModuleUrl);
+  assert.deepEqual(SUPPORTED_AGENTS.get('claudecode'), {
+    name: 'Claude Code',
+    configDir: '~/.claude',
+    configFile: 'settings.json',
+  });
+  const fixture = await createFixture();
+  try {
+    const result = await runNode(['--no-warnings', cliPath, 'status'], {
+      HOME: fixture.homeDir,
+      USERPROFILE: fixture.homeDir,
+      CLAUDE_CONFIG_DIR: fixture.claudeConfigDir,
+    }, fixture.projectDir);
+    assert.equal(result.code, 0, result.stderr);
+    assert.match(result.stdout, /Claude Code \(claudecode\)/);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude installs one exact managed triple and preserves user settings', async () => {
+  const existing = {
+    $schema: 'https://json.schemastore.org/claude-code-settings.json',
+    model: 'sonnet',
+    disableAllHooks: false,
+    hooks: {
+      Notification: [{
+        matcher: 'permission_prompt',
+        hooks: [{ type: 'http', url: 'https://example.test/hook', timeout: 1 }],
+      }],
+      PreToolUse: [{
+        matcher: 'Bash',
+        hooks: [{ type: 'command', command: 'existing-command', timeout: 5 }],
+      }],
+    },
+  };
+  const fixture = await createFixture({ settings: existing });
+  try {
+    const first = await fixture.install();
+    assert.equal(first.code, 0, first.stderr);
+    assert.match(first.stdout, /run \/hooks and claude doctor/i);
+    const installed = await readSettings(fixture.settingsPath);
+    assert.equal(installed.settings.model, 'sonnet');
+    assert.deepEqual(installed.settings.hooks.Notification, existing.hooks.Notification);
+    assert.deepEqual(installed.settings.hooks.PreToolUse[0], existing.hooks.PreToolUse[0]);
+    assertManagedTriple(installed.settings, fixture);
+
+    const second = await fixture.install();
+    assert.equal(second.code, 0, second.stderr);
+    assert.equal(await readFile(fixture.settingsPath, 'utf-8'), installed.raw);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude resolves absolute, relative, empty, and absent CLAUDE_CONFIG_DIR values', async () => {
+  const custom = await createFixture();
+  try {
+    assert.equal((await custom.install()).code, 0);
+    assert.equal((await readSettings(custom.settingsPath)).settings.hooks !== undefined, true);
+    await assertMissing(path.join(custom.homeDir, '.claude', 'settings.json'));
+  } finally {
+    await custom.close();
+  }
+
+  const fallback = await createFixture({ explicitClaudeConfig: false });
+  try {
+    assert.equal((await fallback.install()).code, 0);
+    assert.equal((await readSettings(fallback.settingsPath)).settings.hooks !== undefined, true);
+  } finally {
+    await fallback.close();
+  }
+
+  const relative = await createFixture();
+  try {
+    relative.claudeConfigOverride = 'relative claude';
+    assert.equal((await relative.install()).code, 0);
+    const relativePath = path.join(relative.projectDir, 'relative claude', 'settings.json');
+    assert.equal((await readSettings(relativePath)).settings.hooks !== undefined, true);
+  } finally {
+    await relative.close();
+  }
+
+  const empty = await createFixture();
+  try {
+    empty.claudeConfigOverride = '';
+    assert.equal((await empty.install()).code, 0);
+    const currentDirectoryPath = path.join(empty.projectDir, 'settings.json');
+    assert.equal((await readSettings(currentDirectoryPath)).settings.hooks !== undefined, true);
+  } finally {
+    await empty.close();
+  }
+});
+
+test('Claude parses settings before creating runtime files', async () => {
+  const fixture = await createFixture({ settings: '{ malformed' });
+  try {
+    const result = await fixture.install();
+    assert.equal(result.code, 1);
+    assert.match(result.stderr, /parse Claude Code user settings/i);
+    assert.equal(await readFile(fixture.settingsPath, 'utf-8'), '{ malformed');
+    await assertMissing(fixture.agentDir);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude rejects invalid official hook shapes before writes', async (t) => {
+  const cases = [
+    ['duplicate', '{"hooks":{},"hooks":{}}', /duplicate field "hooks"/i],
+    ['disabled type', JSON.stringify({ disableAllHooks: 'yes' }), /must be a boolean/i],
+    ['hooks shape', JSON.stringify({ hooks: null }), /field "hooks" must be an object/i],
+    ['unknown event', JSON.stringify({ hooks: { MadeUp: [] } }), /unsupported hook event/i],
+    ['event shape', JSON.stringify({ hooks: { PreToolUse: null } }), /must be an array/i],
+    ['group shape', JSON.stringify({ hooks: { PreToolUse: [null] } }), /group.*must be an object/i],
+    ['group field', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [], label: 'x' }] } }), /unsupported field "label"/i],
+    ['matcher shape', JSON.stringify({ hooks: { PreToolUse: [{ matcher: 1, hooks: [] }] } }), /matcher must be a string/i],
+    ['hooks missing', JSON.stringify({ hooks: { PreToolUse: [{}] } }), /must contain a hooks array/i],
+    ['handler shape', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [null] }] } }), /handler.*must be an object/i],
+    ['handler type', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'file' }] }] } }), /unsupported type/i],
+    ['handler field', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'command', command: 'x', invented: true }] }] } }), /unsupported field "invented"/i],
+    ['command value', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'command', command: '' }] }] } }), /non-empty string/i],
+    ['argument type', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'command', command: 'x', args: [1] }] }] } }), /array of strings/i],
+    ['timeout zero', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'command', command: 'x', timeout: 0 }] }] } }), /positive finite number/i],
+    ['headers type', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'http', url: 'https://example.test', headers: { A: 1 } }] }] } }), /map names to strings/i],
+    ['input type', JSON.stringify({ hooks: { PreToolUse: [{ hooks: [{ type: 'mcp_tool', server: 's', tool: 't', input: [] }] }] } }), /input.*must be an object/i],
+  ];
+  for (const [name, settings, pattern] of cases) {
+    await t.test(name, async () => {
+      const fixture = await createFixture({ settings });
+      try {
+        const result = await fixture.install();
+        assert.equal(result.code, 1);
+        assert.match(result.stderr, pattern);
+        assert.equal(await readFile(fixture.settingsPath, 'utf-8'), settings);
+        await assertMissing(fixture.agentDir);
+      } finally {
+        await fixture.close();
+      }
+    });
+  }
+});
+
+test('Claude refuses installation while user hooks are disabled', async () => {
+  const fixture = await createFixture({ settings: { disableAllHooks: true } });
+  try {
+    const result = await fixture.install();
+    assert.equal(result.code, 1);
+    assert.match(result.stderr, /disabled by disableAllHooks/i);
+    await assertMissing(fixture.agentDir);
+    assert.deepEqual((await readSettings(fixture.settingsPath)).settings, {
+      disableAllHooks: true,
+    });
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude migrates exact legacy hooks and preserves ownership lookalikes', async () => {
+  const fixture = await createFixture();
+  const lookalike = { ...legacyHandler(fixture.guardScriptPath) };
+  lookalike.command += ' --inspect';
+  const legacy = {
+    hooks: {
+      PreToolUse: [{ hooks: [legacyHandler(fixture.guardScriptPath)] }, { hooks: [lookalike] }],
+      PostToolUse: [{ hooks: [legacyHandler(fixture.hookScriptPath)] }],
+    },
+  };
+  try {
+    await writeJson(fixture.settingsPath, legacy);
+    const install = await fixture.install();
+    assert.equal(install.code, 0, install.stderr);
+    let { settings } = await readSettings(fixture.settingsPath);
+    assertManagedTriple(settings, fixture);
+    assert(settings.hooks.PreToolUse.some((group) => group.hooks[0].command === lookalike.command));
+
+    const managed = settings.hooks.PreToolUse.at(-1);
+    managed.hooks.push({ type: 'command', command: 'user-command', timeout: 5 });
+    await writeJson(fixture.settingsPath, settings);
+    const uninstall = await runPlugin(fixture, 'uninstall', 'agent-1');
+    assert.equal(uninstall.code, 0, uninstall.stderr);
+    settings = (await readSettings(fixture.settingsPath)).settings;
+    assert.deepEqual(settings.hooks.PreToolUse.flatMap((group) => group.hooks), [
+      lookalike,
+      { type: 'command', command: 'user-command', timeout: 5 },
+    ]);
+    assert.equal(settings.hooks.PostToolUse, undefined);
+    assert.equal(settings.hooks.PostToolUseFailure, undefined);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude uninstall preserves user sources and removes a fully managed file', async () => {
+  const user = await createFixture({ settings: { model: 'sonnet', hooks: { Notification: [] } } });
+  try {
+    assert.equal((await user.install()).code, 0);
+    const result = await runPlugin(user, 'uninstall', 'agent-1');
+    assert.equal(result.code, 0, result.stderr);
+    assert.deepEqual((await readSettings(user.settingsPath)).settings, {
+      model: 'sonnet',
+      hooks: { Notification: [] },
+    });
+  } finally {
+    await user.close();
+  }
+
+  const managed = await createFixture();
+  try {
+    assert.equal((await managed.install()).code, 0);
+    assert.equal((await runPlugin(managed, 'uninstall', 'agent-1')).code, 0);
+    await assertMissing(managed.settingsPath);
+  } finally {
+    await managed.close();
+  }
+});
+
+test('Claude status requires one enabled complete triple and strict runtime identity', async () => {
+  const fixture = await createFixture();
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    let status = await runPlugin(fixture, 'status', null);
+    assert.equal(JSON.parse(status.stdout).installed, true);
+
+    let { settings } = await readSettings(fixture.settingsPath);
+    delete settings.hooks.PostToolUseFailure;
+    await writeJson(fixture.settingsPath, settings);
+    status = await runPlugin(fixture, 'status', null);
+    assert.equal(JSON.parse(status.stdout).installed, false);
+
+    assert.equal((await fixture.install()).code, 0);
+    settings = (await readSettings(fixture.settingsPath)).settings;
+    settings.hooks.PostToolUseFailure.push(settings.hooks.PostToolUseFailure.at(-1));
+    await writeJson(fixture.settingsPath, settings);
+    status = await runPlugin(fixture, 'status', null);
+    assert.equal(JSON.parse(status.stdout).installed, false);
+
+    assert.equal((await fixture.install()).code, 0);
+    settings = (await readSettings(fixture.settingsPath)).settings;
+    settings.disableAllHooks = true;
+    await writeJson(fixture.settingsPath, settings);
+    status = await runPlugin(fixture, 'status', null);
+    assert.equal(JSON.parse(status.stdout).installed, false);
+
+    settings.disableAllHooks = false;
+    await writeJson(fixture.settingsPath, settings);
+    await writeFile(path.join(fixture.agentDir, 'private.key'), 'invalid');
+    status = await runPlugin(fixture, 'status', null);
+    assert.equal(status.code, 1);
+    assert.match(status.stderr, /private key is invalid/i);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude leaves project and local settings unchanged', async () => {
+  const fixture = await createFixture();
+  const projectSettings = path.join(fixture.projectDir, '.claude', 'settings.json');
+  const localSettings = path.join(fixture.projectDir, '.claude', 'settings.local.json');
+  const projectSource = '{"hooks":{"PreToolUse":[]}}\n';
+  const localSource = '{"model":"haiku"}\n';
+  try {
+    await mkdir(path.dirname(projectSettings), { recursive: true });
+    await writeFile(projectSettings, projectSource);
+    await writeFile(localSettings, localSource);
+    assert.equal((await fixture.install()).code, 0);
+    assert.equal(await readFile(projectSettings, 'utf-8'), projectSource);
+    assert.equal(await readFile(localSettings, 'utf-8'), localSource);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude CLI completes install, status, and uninstall end to end', async () => {
+  const fixture = await createFixture();
+  const privateKeyFile = path.join(fixture.rootDir, 'install-private.key');
+  const tokenFile = path.join(fixture.rootDir, 'install-token.txt');
+  const environment = {
+    HOME: fixture.homeDir,
+    USERPROFILE: fixture.homeDir,
+    CLAUDE_CONFIG_DIR: fixture.claudeConfigDir,
+  };
+  try {
+    await writeFile(privateKeyFile, `${VALID_PRIVATE_KEY}\n`, { mode: 0o600 });
+    await writeFile(tokenFile, 'token-1\n', { mode: 0o600 });
+    const install = await runNode([
+      '--no-warnings',
+      cliPath,
+      'install',
+      '--agent', 'claudecode',
+      '--org_id', 'org-1',
+      '--agent_id', 'agent-1',
+      '--kid', 'kid-1',
+      '--private_key_file', privateKeyFile,
+      '--token_file', tokenFile,
+      '--base_url', fixture.baseUrl,
+    ], environment, fixture.projectDir);
+    assert.equal(install.code, 0, install.stderr);
+    assert.match(install.stdout, /installed for Claude Code/i);
+    assertManagedTriple((await readSettings(fixture.settingsPath)).settings, fixture);
+
+    const status = await runNode(
+      ['--no-warnings', cliPath, 'status'],
+      environment,
+      fixture.projectDir,
+    );
+    assert.equal(status.code, 0, status.stderr);
+    assert.match(status.stdout, /Claude Code \(claudecode\) \[installed\]/);
+
+    const uninstall = await runNode([
+      '--no-warnings',
+      cliPath,
+      'uninstall',
+      '--agent', 'claudecode',
+      '--agent_id', 'agent-1',
+    ], environment, fixture.projectDir);
+    assert.equal(uninstall.code, 0, uninstall.stderr);
+    assert.match(uninstall.stdout, /uninstalled for Claude Code/i);
+    await assertMissing(fixture.settingsPath);
+    await assertMissing(fixture.agentDir);
+  } finally {
+    await fixture.close();
+  }
+});

test/claudecode-runtime.test.mjs

@@ -0,0 +1,145 @@
+import assert from 'node:assert/strict';
+import { readFile } from 'node:fs/promises';
+import path from 'node:path';
+import test from 'node:test';
+import {
+  createFixture,
+  managedHandler,
+  readSettings,
+  runClaudeHook,
+  startApiServer,
+} from '../test-support/claudecode-test-helpers.mjs';
+
+function officialPayload(event, overrides = {}) {
+  return {
+    session_id: 'session-1',
+    prompt_id: '302d811d-0d17-41ad-a359-d2cb618fd42b',
+    transcript_path: '/tmp/session-1.jsonl',
+    cwd: '/tmp/project',
+    permission_mode: 'default',
+    effort: { level: 'high' },
+    hook_event_name: event,
+    tool_name: 'Bash',
+    tool_input: { command: 'npm test', description: 'Run tests' },
+    tool_use_id: 'toolu_01ABC123',
+    ...overrides,
+  };
+}
+
+test('Claude runtimes enforce active state and preserve official event payloads', async () => {
+  const api = await startApiServer();
+  const fixture = await createFixture({ baseUrl: api.baseUrl });
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    const { settings } = await readSettings(fixture.settingsPath);
+    const guard = managedHandler(settings, 'PreToolUse');
+    const successAudit = managedHandler(settings, 'PostToolUse');
+    const failureAudit = managedHandler(settings, 'PostToolUseFailure');
+
+    const pre = officialPayload('PreToolUse');
+    const guardResult = await runClaudeHook(guard, JSON.stringify(pre), fixture);
+    assert.equal(guardResult.code, 0, guardResult.stderr);
+    assert.equal(guardResult.stdout, '');
+
+    const success = officialPayload('PostToolUse', {
+      tool_response: {
+        stdout: 'tests passed',
+        stderr: '',
+        interrupted: false,
+        isImage: false,
+      },
+    });
+    const successResult = await runClaudeHook(successAudit, JSON.stringify(success), fixture);
+    assert.equal(successResult.code, 0, successResult.stderr);
+
+    const failure = officialPayload('PostToolUseFailure', {
+      error: 'Command exited with non-zero status code 1',
+      is_interrupt: false,
+      duration_ms: 4187,
+    });
+    const failureResult = await runClaudeHook(failureAudit, JSON.stringify(failure), fixture);
+    assert.equal(failureResult.code, 0, failureResult.stderr);
+
+    assert.equal(api.requests.length, 3);
+    assert.deepEqual(
+      api.requests.map((request) => [request.method, request.url]),
+      [
+        ['GET', '/v1/agents/agent-1'],
+        ['POST', '/v1/operations'],
+        ['POST', '/v1/operations'],
+      ],
+    );
+    const successOperation = JSON.parse(api.requests[1].raw);
+    const failureOperation = JSON.parse(api.requests[2].raw);
+    assert.deepEqual(successOperation.payload, success);
+    assert.deepEqual(failureOperation.payload, failure);
+    assert.deepEqual(successOperation.subject, { session_id: 'session-1' });
+    assert.deepEqual(successOperation.action, { tool: 'Bash' });
+    assert.equal(api.requests[1].headers.authorization, 'Bearer token-1');
+    assert.equal(failureOperation.prev_chain_hash, successOperation.chain_hash);
+  } finally {
+    await fixture.close();
+    await api.close();
+  }
+});
+
+test('Claude guard returns official blocking exit code 2 for frozen and revoked agents', async (t) => {
+  for (const status of ['frozen', 'revoked']) {
+    await t.test(status, async () => {
+      const api = await startApiServer({ status });
+      const fixture = await createFixture({ baseUrl: api.baseUrl });
+      try {
+        assert.equal((await fixture.install()).code, 0);
+        const { settings } = await readSettings(fixture.settingsPath);
+        const guard = managedHandler(settings, 'PreToolUse');
+        const result = await runClaudeHook(
+          guard,
+          JSON.stringify(officialPayload('PreToolUse')),
+          fixture,
+        );
+        assert.equal(result.code, 2);
+        assert.equal(result.stdout, '');
+        assert.match(result.stderr, new RegExp(`Agent "claudecode" is ${status}`, 'i'));
+        assert.match(result.stderr, /Tool execution blocked/i);
+      } finally {
+        await fixture.close();
+        await api.close();
+      }
+    });
+  }
+});
+
+test('Claude runtime failures stay observable while guard and audit delivery remain fail-open', async () => {
+  const fixture = await createFixture();
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    const { settings } = await readSettings(fixture.settingsPath);
+    const guard = managedHandler(settings, 'PreToolUse');
+    const audit = managedHandler(settings, 'PostToolUse');
+
+    const guardResult = await runClaudeHook(
+      guard,
+      JSON.stringify(officialPayload('PreToolUse')),
+      fixture,
+    );
+    assert.equal(guardResult.code, 0);
+    assert.match(guardResult.stderr, /Failed to resolve agent status/i);
+
+    const auditResult = await runClaudeHook(
+      audit,
+      JSON.stringify(officialPayload('PostToolUse', { tool_response: { stdout: '' } })),
+      fixture,
+    );
+    assert.equal(auditResult.code, 0);
+    const errorLog = await readFile(path.join(fixture.agentDir, 'error.log'), 'utf-8');
+    assert.match(errorLog, /\[claudecode\]/i);
+    assert.match(errorLog, /fetch failed|ECONNREFUSED/i);
+
+    const malformed = await runClaudeHook(audit, '{ malformed', fixture);
+    assert.equal(malformed.code, 0);
+    const updatedLog = await readFile(path.join(fixture.agentDir, 'error.log'), 'utf-8');
+    assert.match(updatedLog, /Hook input is invalid JSON/i);
+  } finally {
+    await fixture.close();
+  }
+});

test/claudecode-transaction.test.mjs

@@ -0,0 +1,323 @@
+import assert from 'node:assert/strict';
+import {
+  lstat,
+  mkdir,
+  readFile,
+  readdir,
+  symlink,
+  writeFile,
+} from 'node:fs/promises';
+import path from 'node:path';
+import test from 'node:test';
+import {
+  createFixture,
+  installationModuleUrl,
+  installConfig,
+  ioModuleUrl,
+  runNode,
+  writeJson,
+} from '../test-support/claudecode-test-helpers.mjs';
+
+const managedFileNames = ['guard.js', 'config.json', 'private.key', 'hook.js'];
+
+async function snapshotInstallation(fixture) {
+  const entries = await Promise.all(managedFileNames.map(async (name) => [
+    path.join(fixture.agentDir, name),
+    await readFile(path.join(fixture.agentDir, name), 'utf-8'),
+  ]));
+  entries.push([fixture.settingsPath, await readFile(fixture.settingsPath, 'utf-8')]);
+  return new Map(entries);
+}
+
+async function assertSnapshot(snapshot) {
+  for (const [filePath, expected] of snapshot) {
+    assert.equal(await readFile(filePath, 'utf-8'), expected, filePath);
+  }
+}
+
+async function assertNoTransactionFiles(fixture) {
+  const names = [
+    ...await readdir(fixture.agentDir),
+    ...await readdir(path.dirname(fixture.settingsPath)),
+  ];
+  assert.equal(names.some((name) => /\.(tmp|rollback)$/.test(name)), false, names.join(', '));
+}
+
+async function preservedRollback(fixture, basename) {
+  const entries = await readdir(fixture.agentDir);
+  const matches = entries.filter(
+    (name) => name.startsWith(`.${basename}.`) && name.endsWith('.rollback'),
+  );
+  assert.equal(matches.length, 1, entries.join(', '));
+  return path.join(fixture.agentDir, matches[0]);
+}
+
+function testEnvironment(fixture, overrides = {}) {
+  return {
+    HOME: fixture.homeDir,
+    USERPROFILE: fixture.homeDir,
+    CLAUDE_CONFIG_DIR: fixture.claudeConfigDir,
+    ELYDORA_INSTALL_CONFIG: JSON.stringify(installConfig(fixture, overrides)),
+  };
+}
+
+test('Claude rolls back all five files when a transaction commit fails', async () => {
+  const fixture = await createFixture();
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    const before = await snapshotInstallation(fixture);
+    const source = `
+      import { rename } from 'node:fs/promises';
+      import { readClaudeDocument } from ${JSON.stringify(ioModuleUrl)};
+      import {
+        commitClaudeInstallation,
+        prepareClaudeInstallation,
+      } from ${JSON.stringify(installationModuleUrl)};
+      const config = JSON.parse(process.env.ELYDORA_INSTALL_CONFIG);
+      const document = await readClaudeDocument();
+      const prepared = await prepareClaudeInstallation(config, { document, changed: false });
+      let calls = 0;
+      await commitClaudeInstallation(prepared, async (from, to) => {
+        calls += 1;
+        if (calls === 3) throw new Error('injected rename failure');
+        await rename(from, to);
+      });
+    `;
+    const result = await runNode(
+      ['--input-type=module', '--eval', source],
+      testEnvironment(fixture, { orgId: 'org-updated', token: 'token-updated' }),
+      fixture.projectDir,
+    );
+    assert.equal(result.code, 1);
+    assert.match(result.stderr, /injected rename failure/i);
+    await assertSnapshot(before);
+    await assertNoTransactionFiles(fixture);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude detects concurrent settings changes before committing runtime updates', async () => {
+  const fixture = await createFixture({ settings: { model: 'sonnet' } });
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    const before = await snapshotInstallation(fixture);
+    const concurrent = '{"model":"opus","hooks":{"Notification":[]}}\n';
+    const source = `
+      import { writeFile } from 'node:fs/promises';
+      import { readClaudeDocument } from ${JSON.stringify(ioModuleUrl)};
+      import {
+        commitClaudeInstallation,
+        prepareClaudeInstallation,
+      } from ${JSON.stringify(installationModuleUrl)};
+      const document = await readClaudeDocument();
+      const prepared = await prepareClaudeInstallation(
+        JSON.parse(process.env.ELYDORA_INSTALL_CONFIG),
+        { document, changed: false },
+      );
+      await writeFile(document.filePath, process.env.ELYDORA_CONCURRENT, 'utf-8');
+      await commitClaudeInstallation(prepared);
+    `;
+    const result = await runNode(
+      ['--input-type=module', '--eval', source],
+      {
+        ...testEnvironment(fixture, { orgId: 'updated' }),
+        ELYDORA_CONCURRENT: concurrent,
+      },
+      fixture.projectDir,
+    );
+    assert.equal(result.code, 1);
+    assert.match(result.stderr, /changed during Claude Code installation/i);
+    for (const [filePath, expected] of before) {
+      if (filePath !== fixture.settingsPath) {
+        assert.equal(await readFile(filePath, 'utf-8'), expected);
+      }
+    }
+    assert.equal(await readFile(fixture.settingsPath, 'utf-8'), concurrent);
+    await assertNoTransactionFiles(fixture);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude rejects a stale settings document before staging files', async () => {
+  const fixture = await createFixture();
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    const before = await snapshotInstallation(fixture);
+    const concurrent = '{"hooks":{"Notification":[]}}\n';
+    const source = `
+      import { writeFile } from 'node:fs/promises';
+      import { readClaudeDocument } from ${JSON.stringify(ioModuleUrl)};
+      import { prepareClaudeInstallation } from ${JSON.stringify(installationModuleUrl)};
+      const document = await readClaudeDocument();
+      await writeFile(document.filePath, process.env.ELYDORA_CONCURRENT, 'utf-8');
+      await prepareClaudeInstallation(
+        JSON.parse(process.env.ELYDORA_INSTALL_CONFIG),
+        { document, changed: false },
+      );
+    `;
+    const result = await runNode(
+      ['--input-type=module', '--eval', source],
+      {
+        ...testEnvironment(fixture),
+        ELYDORA_CONCURRENT: concurrent,
+      },
+      fixture.projectDir,
+    );
+    assert.equal(result.code, 1);
+    assert.match(result.stderr, /changed before installation/i);
+    for (const [filePath, expected] of before) {
+      if (filePath !== fixture.settingsPath) {
+        assert.equal(await readFile(filePath, 'utf-8'), expected);
+      }
+    }
+    assert.equal(await readFile(fixture.settingsPath, 'utf-8'), concurrent);
+    await assertNoTransactionFiles(fixture);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude preserves rollback data after a committed runtime changes', async () => {
+  const fixture = await createFixture();
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    const original = await readFile(fixture.guardScriptPath, 'utf-8');
+    const source = `
+      import { rename, rm, writeFile } from 'node:fs/promises';
+      import { readClaudeDocument } from ${JSON.stringify(ioModuleUrl)};
+      import {
+        commitClaudeInstallation,
+        prepareClaudeInstallation,
+      } from ${JSON.stringify(installationModuleUrl)};
+      const document = await readClaudeDocument();
+      const prepared = await prepareClaudeInstallation(
+        JSON.parse(process.env.ELYDORA_INSTALL_CONFIG),
+        { document, changed: false },
+      );
+      let calls = 0;
+      await commitClaudeInstallation(prepared, async (from, to) => {
+        calls += 1;
+        if (calls === 1) {
+          await rename(from, to);
+          await rm(to);
+          await writeFile(to, 'external change\\n');
+          return;
+        }
+        if (calls === 2) throw new Error('injected later commit failure');
+        await rename(from, to);
+      });
+    `;
+    const result = await runNode(
+      ['--input-type=module', '--eval', source],
+      testEnvironment(fixture, { orgId: 'updated' }),
+      fixture.projectDir,
+    );
+    assert.equal(result.code, 1);
+    assert.match(result.stderr, /original content preserved at/i);
+    assert.equal(await readFile(fixture.guardScriptPath, 'utf-8'), 'external change\n');
+    assert.equal(await readFile(await preservedRollback(fixture, 'guard.js'), 'utf-8'), original);
+  } finally {
+    await fixture.close();
+  }
+});
+
+test('Claude rejects orphaned and mismatched runtime identities before writes', async (t) => {
+  await t.test('orphaned runtime', async () => {
+    const fixture = await createFixture();
+    try {
+      await mkdir(fixture.agentDir, { recursive: true });
+      await writeFile(fixture.guardScriptPath, 'orphaned guard\n');
+      const result = await fixture.install();
+      assert.equal(result.code, 1);
+      assert.match(result.stderr, /identity cannot be verified/i);
+      assert.equal(await readFile(fixture.guardScriptPath, 'utf-8'), 'orphaned guard\n');
+      await assertMissing(fixture.settingsPath);
+    } finally {
+      await fixture.close();
+    }
+  });
+
+  await t.test('mismatched identity', async () => {
+    const fixture = await createFixture();
+    try {
+      await writeJson(path.join(fixture.agentDir, 'config.json'), {
+        agent_name: 'claudecode',
+        agent_id: 'another-agent',
+      });
+      const configPath = path.join(fixture.agentDir, 'config.json');
+      const before = await readFile(configPath, 'utf-8');
+      const result = await fixture.install();
+      assert.equal(result.code, 1);
+      assert.match(result.stderr, /identity does not match/i);
+      assert.equal(await readFile(configPath, 'utf-8'), before);
+      await assertMissing(fixture.settingsPath);
+    } finally {
+      await fixture.close();
+    }
+  });
+});
+
+async function assertMissing(filePath) {
+  await assert.rejects(lstat(filePath), { code: 'ENOENT' });
+}
+
+test('Claude rejects linked configuration, settings, and runtime paths', async (t) => {
+  for (const kind of ['configuration', 'settings', 'runtime']) {
+    await t.test(kind, async () => {
+      const fixture = await createFixture();
+      try {
+        const target = path.join(fixture.rootDir, `${kind}-target`);
+        await mkdir(target, { recursive: true });
+        await mkdir(fixture.homeDir, { recursive: true });
+        let link;
+        let linkType = 'junction';
+        if (kind === 'configuration') {
+          link = fixture.claudeConfigDir;
+        } else if (kind === 'runtime') {
+          link = path.join(fixture.homeDir, '.elydora');
+        } else {
+          await mkdir(fixture.claudeConfigDir, { recursive: true });
+          const targetFile = path.join(target, 'settings.json');
+          await writeFile(targetFile, '{}\n');
+          link = fixture.settingsPath;
+          linkType = 'file';
+          await symlink(targetFile, link, linkType).catch((error) => { throw error; });
+        }
+        if (kind !== 'settings') {
+          try {
+            await symlink(target, link, linkType);
+          } catch (error) {
+            if (error?.code === 'EPERM') {
+              t.skip(`symbolic links unavailable: ${error.message}`);
+              return;
+            }
+            throw error;
+          }
+        }
+        const result = await fixture.install();
+        assert.equal(result.code, 1);
+        assert.match(result.stderr, /physical (directory|file)/i);
+      } catch (error) {
+        if (error?.code === 'EPERM') {
+          t.skip(`symbolic links unavailable: ${error.message}`);
+          return;
+        }
+        throw error;
+      } finally {
+        await fixture.close();
+      }
+    });
+  }
+});
+
+test('Claude installation leaves no transaction artifacts', async () => {
+  const fixture = await createFixture();
+  try {
+    assert.equal((await fixture.install()).code, 0);
+    await assertNoTransactionFiles(fixture);
+  } finally {
+    await fixture.close();
+  }
+});