feat: implement Claudeman - Claude session manager with Ralph Loop

Claudeman manages multiple Claude CLI sessions as subprocesses with:
- Session management (start/stop/list/logs)
- Priority-based task queue with dependency support
- Ralph Loop for autonomous task assignment and completion detection
- Time-aware loops for extended work sessions
- JSON file persistence to ~/.claudeman/state.json

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/types.ts

@@ -0,0 +1,104 @@
+export type SessionStatus = 'idle' | 'busy' | 'stopped' | 'error';
+export type TaskStatus = 'pending' | 'running' | 'completed' | 'failed';
+export type RalphLoopStatus = 'stopped' | 'running' | 'paused';
+
+export interface SessionConfig {
+  id: string;
+  workingDir: string;
+  createdAt: number;
+}
+
+export interface SessionState {
+  id: string;
+  pid: number | null;
+  status: SessionStatus;
+  workingDir: string;
+  currentTaskId: string | null;
+  createdAt: number;
+  lastActivityAt: number;
+}
+
+export interface TaskDefinition {
+  id: string;
+  prompt: string;
+  workingDir: string;
+  priority: number;
+  dependencies: string[];
+  completionPhrase?: string;
+  timeoutMs?: number;
+}
+
+export interface TaskState {
+  id: string;
+  prompt: string;
+  workingDir: string;
+  priority: number;
+  dependencies: string[];
+  completionPhrase?: string;
+  timeoutMs?: number;
+  status: TaskStatus;
+  assignedSessionId: string | null;
+  createdAt: number;
+  startedAt: number | null;
+  completedAt: number | null;
+  output: string;
+  error: string | null;
+}
+
+export interface RalphLoopState {
+  status: RalphLoopStatus;
+  startedAt: number | null;
+  minDurationMs: number | null;
+  tasksCompleted: number;
+  tasksGenerated: number;
+  lastCheckAt: number | null;
+}
+
+export interface AppState {
+  sessions: Record<string, SessionState>;
+  tasks: Record<string, TaskState>;
+  ralphLoop: RalphLoopState;
+  config: AppConfig;
+}
+
+export interface AppConfig {
+  pollIntervalMs: number;
+  defaultTimeoutMs: number;
+  maxConcurrentSessions: number;
+  stateFilePath: string;
+}
+
+export interface SessionOutput {
+  stdout: string;
+  stderr: string;
+  exitCode: number | null;
+}
+
+export interface TaskAssignment {
+  sessionId: string;
+  taskId: string;
+  assignedAt: number;
+}
+
+export const DEFAULT_CONFIG: AppConfig = {
+  pollIntervalMs: 1000,
+  defaultTimeoutMs: 300000, // 5 minutes
+  maxConcurrentSessions: 5,
+  stateFilePath: '',
+};
+
+export function createInitialState(): AppState {
+  return {
+    sessions: {},
+    tasks: {},
+    ralphLoop: {
+      status: 'stopped',
+      startedAt: null,
+      minDurationMs: null,
+      tasksCompleted: 0,
+      tasksGenerated: 0,
+      lastCheckAt: null,
+    },
+    config: { ...DEFAULT_CONFIG },
+  };
+}