PLG-CAL-002: Implement calendar scheduler for agent slot wakeup

- Add CalendarScheduler class to manage periodic heartbeat and slot execution
- Implement agent wakeup logic when Idle and slots are pending
- Handle slot status transitions (attended, ongoing, deferred)
- Support both real and virtual slot materialization
- Add task context building for different event types (job, system, entertainment)
- Integrate scheduler into main plugin index.ts
- Add new plugin tools: harborforge_calendar_status, complete, abort

plugin/calendar/index.d.ts

@@ -2,22 +2,32 @@
  * HarborForge Calendar — Plugin Module
  *
  * PLG-CAL-001: Calendar heartbeat request/response format definition.
+ * PLG-CAL-002: Plugin-side slot execution scheduler and agent wakeup.
  *
  * Exports:
  *   • Types for heartbeat request/response and slot update
  *   • CalendarBridgeClient — HTTP client for backend communication
  *   • createCalendarBridgeClient — factory from plugin API context
+ *   • CalendarScheduler — manages periodic heartbeat and slot execution
+ *   • createCalendarScheduler — factory for scheduler
+ *   • AgentWakeContext — context passed to agent when waking
  *
  * Usage in plugin/index.ts:
- *   import { createCalendarBridgeClient } from './calendar';
+ *   import { createCalendarBridgeClient, createCalendarScheduler } from './calendar';
  *
  *   const agentId = process.env.AGENT_ID || 'unknown';
  *   const calendar = createCalendarBridgeClient(api, 'https://monitor.hangman-lab.top', agentId);
  *
- *   // Inside gateway_start or heartbeat tick:
- *   const result = await calendar.heartbeat();
- *   if (result?.slots.length) { /* handle pending slots /\ }
+ *   const scheduler = createCalendarScheduler({
+ *     bridge: calendar,
+ *     getAgentStatus: async () => { ... },
+ *     wakeAgent: async (context) => { ... },
+ *     logger: api.logger,
+ *   });
+ *
+ *   scheduler.start();
  */
 export * from './types';
 export * from './calendar-bridge';
+export * from './scheduler';
 //# sourceMappingURL=index.d.ts.map

plugin/calendar/index.d.ts.map

@@ -1 +1 @@
-{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["index.ts"],"names":[],"mappings":"AAAA;;;;;;;;;;;;;;;;;;;GAmBG;AAEH,cAAc,SAAS,CAAC;AACxB,cAAc,mBAAmB,CAAC"}
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["index.ts"],"names":[],"mappings":"AAAA;;;;;;;;;;;;;;;;;;;;;;;;;;;;GA4BG;AAEH,cAAc,SAAS,CAAC;AACxB,cAAc,mBAAmB,CAAC;AAClC,cAAc,aAAa,CAAC"}

plugin/calendar/index.js

@@ -3,21 +3,30 @@
  * HarborForge Calendar — Plugin Module
  *
  * PLG-CAL-001: Calendar heartbeat request/response format definition.
+ * PLG-CAL-002: Plugin-side slot execution scheduler and agent wakeup.
  *
  * Exports:
  *   • Types for heartbeat request/response and slot update
  *   • CalendarBridgeClient — HTTP client for backend communication
  *   • createCalendarBridgeClient — factory from plugin API context
+ *   • CalendarScheduler — manages periodic heartbeat and slot execution
+ *   • createCalendarScheduler — factory for scheduler
+ *   • AgentWakeContext — context passed to agent when waking
  *
  * Usage in plugin/index.ts:
- *   import { createCalendarBridgeClient } from './calendar';
+ *   import { createCalendarBridgeClient, createCalendarScheduler } from './calendar';
  *
  *   const agentId = process.env.AGENT_ID || 'unknown';
  *   const calendar = createCalendarBridgeClient(api, 'https://monitor.hangman-lab.top', agentId);
  *
- *   // Inside gateway_start or heartbeat tick:
- *   const result = await calendar.heartbeat();
- *   if (result?.slots.length) { /* handle pending slots /\ }
+ *   const scheduler = createCalendarScheduler({
+ *     bridge: calendar,
+ *     getAgentStatus: async () => { ... },
+ *     wakeAgent: async (context) => { ... },
+ *     logger: api.logger,
+ *   });
+ *
+ *   scheduler.start();
  */
 var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
     if (k2 === undefined) k2 = k;
@@ -36,4 +45,5 @@ var __exportStar = (this && this.__exportStar) || function(m, exports) {
 Object.defineProperty(exports, "__esModule", { value: true });
 __exportStar(require("./types"), exports);
 __exportStar(require("./calendar-bridge"), exports);
+__exportStar(require("./scheduler"), exports);
 //# sourceMappingURL=index.js.map

plugin/calendar/index.js.map

@@ -1 +1 @@
-{"version":3,"file":"index.js","sourceRoot":"","sources":["index.ts"],"names":[],"mappings":";AAAA;;;;;;;;;;;;;;;;;;;GAmBG;;;;;;;;;;;;;;;;AAEH,0CAAwB;AACxB,oDAAkC"}
+{"version":3,"file":"index.js","sourceRoot":"","sources":["index.ts"],"names":[],"mappings":";AAAA;;;;;;;;;;;;;;;;;;;;;;;;;;;;GA4BG;;;;;;;;;;;;;;;;AAEH,0CAAwB;AACxB,oDAAkC;AAClC,8CAA4B"}

plugin/calendar/index.ts

@@ -2,22 +2,32 @@
  * HarborForge Calendar — Plugin Module
  *
  * PLG-CAL-001: Calendar heartbeat request/response format definition.
+ * PLG-CAL-002: Plugin-side slot execution scheduler and agent wakeup.
  *
  * Exports:
  *   • Types for heartbeat request/response and slot update
  *   • CalendarBridgeClient — HTTP client for backend communication
  *   • createCalendarBridgeClient — factory from plugin API context
+ *   • CalendarScheduler — manages periodic heartbeat and slot execution
+ *   • createCalendarScheduler — factory for scheduler
+ *   • AgentWakeContext — context passed to agent when waking
  *
  * Usage in plugin/index.ts:
- *   import { createCalendarBridgeClient } from './calendar';
+ *   import { createCalendarBridgeClient, createCalendarScheduler } from './calendar';
  *
  *   const agentId = process.env.AGENT_ID || 'unknown';
  *   const calendar = createCalendarBridgeClient(api, 'https://monitor.hangman-lab.top', agentId);
  *
- *   // Inside gateway_start or heartbeat tick:
- *   const result = await calendar.heartbeat();
- *   if (result?.slots.length) { /* handle pending slots /\ }
+ *   const scheduler = createCalendarScheduler({
+ *     bridge: calendar,
+ *     getAgentStatus: async () => { ... },
+ *     wakeAgent: async (context) => { ... },
+ *     logger: api.logger,
+ *   });
+ *
+ *   scheduler.start();
  */
 
 export * from './types';
 export * from './calendar-bridge';
+export * from './scheduler';

plugin/calendar/scheduler.d.ts

@@ -0,0 +1,184 @@
+/**
+ * HarborForge Calendar Scheduler
+ *
+ * PLG-CAL-002: Plugin-side handling for pending slot execution.
+ *
+ * Responsibilities:
+ *   - Run calendar heartbeat every minute
+ *   - Detect when agent is Idle and slots are pending
+ *   - Wake agent with task context
+ *   - Handle slot status transitions (attended, ongoing, deferred)
+ *   - Manage agent status transitions (idle → busy/on_call)
+ *
+ * Design reference: NEXT_WAVE_DEV_DIRECTION.md §6 (Agent wakeup mechanism)
+ */
+import { CalendarBridgeClient } from './calendar-bridge';
+import { CalendarSlotResponse, AgentStatusValue } from './types';
+export interface CalendarSchedulerConfig {
+    /** Calendar bridge client for backend communication */
+    bridge: CalendarBridgeClient;
+    /** Function to get current agent status from backend */
+    getAgentStatus: () => Promise<AgentStatusValue | null>;
+    /** Function to wake/spawn agent with task context */
+    wakeAgent: (context: AgentWakeContext) => Promise<boolean>;
+    /** Logger instance */
+    logger: {
+        info: (...args: any[]) => void;
+        error: (...args: any[]) => void;
+        debug: (...args: any[]) => void;
+        warn: (...args: any[]) => void;
+    };
+    /** Heartbeat interval in milliseconds (default: 60000) */
+    heartbeatIntervalMs?: number;
+    /** Enable verbose debug logging */
+    debug?: boolean;
+}
+/**
+ * Context passed to agent when waking for slot execution.
+ * This is the payload the agent receives to understand what to do.
+ */
+export interface AgentWakeContext {
+    /** The slot to execute */
+    slot: CalendarSlotResponse;
+    /** Human-readable task description */
+    taskDescription: string;
+    /** Prompt/instructions for the agent */
+    prompt: string;
+    /** Whether this is a virtual slot (needs materialization) */
+    isVirtual: boolean;
+}
+/**
+ * Current execution state tracked by the scheduler.
+ */
+interface SchedulerState {
+    /** Whether scheduler is currently running */
+    isRunning: boolean;
+    /** Currently executing slot (null if idle) */
+    currentSlot: CalendarSlotResponse | null;
+    /** Last heartbeat timestamp */
+    lastHeartbeatAt: Date | null;
+    /** Interval handle for cleanup */
+    intervalHandle: ReturnType<typeof setInterval> | null;
+    /** Set of slot IDs that have been deferred in current session */
+    deferredSlotIds: Set<string>;
+    /** Whether agent is currently processing a slot */
+    isProcessing: boolean;
+}
+/**
+ * CalendarScheduler manages the periodic heartbeat and slot execution lifecycle.
+ */
+export declare class CalendarScheduler {
+    private config;
+    private state;
+    constructor(config: CalendarSchedulerConfig);
+    /**
+     * Start the calendar scheduler.
+     * Begins periodic heartbeat to check for pending slots.
+     */
+    start(): void;
+    /**
+     * Stop the calendar scheduler.
+     * Cleans up intervals and resets state.
+     */
+    stop(): void;
+    /**
+     * Execute a single heartbeat cycle.
+     * Fetches pending slots and handles execution logic.
+     */
+    runHeartbeat(): Promise<void>;
+    /**
+     * Handle slots when agent is not idle.
+     * Defer all pending slots with priority boost.
+     */
+    private handleNonIdleAgent;
+    /**
+     * Handle slots when agent is idle.
+     * Select highest priority slot and wake agent.
+     */
+    private handleIdleAgent;
+    /**
+     * Execute a slot by waking the agent.
+     */
+    private executeSlot;
+    /**
+     * Build the wake context for an agent based on slot details.
+     */
+    private buildWakeContext;
+    /**
+     * Build prompt for job-type slots.
+     */
+    private buildJobPrompt;
+    /**
+     * Build prompt for system event slots.
+     */
+    private buildSystemPrompt;
+    /**
+     * Build prompt for entertainment slots.
+     */
+    private buildEntertainmentPrompt;
+    /**
+     * Build generic prompt for slots without specific event data.
+     */
+    private buildGenericPrompt;
+    /**
+     * Mark a slot as deferred with priority boost.
+     */
+    private deferSlot;
+    /**
+     * Revert a slot to not_started status after failed execution attempt.
+     */
+    private revertSlot;
+    /**
+     * Complete the current slot execution.
+     * Call this when the agent finishes the task.
+     */
+    completeCurrentSlot(actualDurationMinutes: number): Promise<void>;
+    /**
+     * Abort the current slot execution.
+     * Call this when the agent cannot complete the task.
+     */
+    abortCurrentSlot(reason?: string): Promise<void>;
+    /**
+     * Pause the current slot execution.
+     * Call this when the agent needs to temporarily pause.
+     */
+    pauseCurrentSlot(): Promise<void>;
+    /**
+     * Resume a paused slot.
+     */
+    resumeCurrentSlot(): Promise<void>;
+    /**
+     * Get a stable ID for a slot (real or virtual).
+     */
+    private getSlotId;
+    /**
+     * Format a Date as ISO time string (HH:MM:SS).
+     */
+    private formatTime;
+    /**
+     * Debug logging helper.
+     */
+    private logDebug;
+    /**
+     * Get current scheduler state (for introspection).
+     */
+    getState(): Readonly<SchedulerState>;
+    /**
+     * Check if scheduler is running.
+     */
+    isRunning(): boolean;
+    /**
+     * Check if currently processing a slot.
+     */
+    isProcessing(): boolean;
+    /**
+     * Get the current slot being executed (if any).
+     */
+    getCurrentSlot(): CalendarSlotResponse | null;
+}
+/**
+ * Factory function to create a CalendarScheduler from plugin context.
+ */
+export declare function createCalendarScheduler(config: CalendarSchedulerConfig): CalendarScheduler;
+export {};
+//# sourceMappingURL=scheduler.d.ts.map

plugin/calendar/scheduler.d.ts.map

@@ -0,0 +1 @@
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plugin/calendar/scheduler.js

@@ -0,0 +1,526 @@
+"use strict";
+/**
+ * HarborForge Calendar Scheduler
+ *
+ * PLG-CAL-002: Plugin-side handling for pending slot execution.
+ *
+ * Responsibilities:
+ *   - Run calendar heartbeat every minute
+ *   - Detect when agent is Idle and slots are pending
+ *   - Wake agent with task context
+ *   - Handle slot status transitions (attended, ongoing, deferred)
+ *   - Manage agent status transitions (idle → busy/on_call)
+ *
+ * Design reference: NEXT_WAVE_DEV_DIRECTION.md §6 (Agent wakeup mechanism)
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.CalendarScheduler = void 0;
+exports.createCalendarScheduler = createCalendarScheduler;
+const types_1 = require("./types");
+/**
+ * CalendarScheduler manages the periodic heartbeat and slot execution lifecycle.
+ */
+class CalendarScheduler {
+    config;
+    state;
+    constructor(config) {
+        this.config = {
+            heartbeatIntervalMs: 60000, // 1 minute default
+            debug: false,
+            ...config,
+        };
+        this.state = {
+            isRunning: false,
+            currentSlot: null,
+            lastHeartbeatAt: null,
+            intervalHandle: null,
+            deferredSlotIds: new Set(),
+            isProcessing: false,
+        };
+    }
+    /**
+     * Start the calendar scheduler.
+     * Begins periodic heartbeat to check for pending slots.
+     */
+    start() {
+        if (this.state.isRunning) {
+            this.config.logger.warn('Calendar scheduler already running');
+            return;
+        }
+        this.state.isRunning = true;
+        this.config.logger.info('Calendar scheduler started');
+        // Run initial heartbeat immediately
+        this.runHeartbeat();
+        // Schedule periodic heartbeats
+        this.state.intervalHandle = setInterval(() => this.runHeartbeat(), this.config.heartbeatIntervalMs);
+    }
+    /**
+     * Stop the calendar scheduler.
+     * Cleans up intervals and resets state.
+     */
+    stop() {
+        this.state.isRunning = false;
+        if (this.state.intervalHandle) {
+            clearInterval(this.state.intervalHandle);
+            this.state.intervalHandle = null;
+        }
+        this.config.logger.info('Calendar scheduler stopped');
+    }
+    /**
+     * Execute a single heartbeat cycle.
+     * Fetches pending slots and handles execution logic.
+     */
+    async runHeartbeat() {
+        if (!this.state.isRunning) {
+            return;
+        }
+        this.state.lastHeartbeatAt = new Date();
+        try {
+            // Fetch pending slots from backend
+            const response = await this.config.bridge.heartbeat();
+            if (!response) {
+                this.logDebug('Heartbeat: backend unreachable');
+                return;
+            }
+            this.logDebug(`Heartbeat: ${response.slots.length} slots pending, agent_status=${response.agent_status}`);
+            // If agent is not idle, defer all pending slots
+            if (response.agent_status !== 'idle') {
+                await this.handleNonIdleAgent(response.slots, response.agent_status);
+                return;
+            }
+            // Agent is idle - handle pending slots
+            await this.handleIdleAgent(response.slots);
+        }
+        catch (err) {
+            this.config.logger.error('Heartbeat error:', err);
+        }
+    }
+    /**
+     * Handle slots when agent is not idle.
+     * Defer all pending slots with priority boost.
+     */
+    async handleNonIdleAgent(slots, agentStatus) {
+        if (slots.length === 0) {
+            return;
+        }
+        this.config.logger.info(`Agent not idle (status=${agentStatus}), deferring ${slots.length} slot(s)`);
+        for (const slot of slots) {
+            const slotId = this.getSlotId(slot);
+            // Skip if already deferred this session
+            if (this.state.deferredSlotIds.has(slotId)) {
+                continue;
+            }
+            // Mark slot as deferred with priority boost (+1)
+            await this.deferSlot(slot);
+            this.state.deferredSlotIds.add(slotId);
+        }
+    }
+    /**
+     * Handle slots when agent is idle.
+     * Select highest priority slot and wake agent.
+     */
+    async handleIdleAgent(slots) {
+        if (slots.length === 0) {
+            return;
+        }
+        // Filter out already deferred slots in this session
+        const eligibleSlots = slots.filter(s => !this.state.deferredSlotIds.has(this.getSlotId(s)));
+        if (eligibleSlots.length === 0) {
+            this.logDebug('All pending slots have been deferred this session');
+            return;
+        }
+        // Select highest priority slot (backend already sorts by priority DESC)
+        const [selectedSlot, ...remainingSlots] = eligibleSlots;
+        this.config.logger.info(`Selected slot for execution: id=${this.getSlotId(selectedSlot)}, ` +
+            `type=${selectedSlot.slot_type}, priority=${selectedSlot.priority}`);
+        // Mark remaining slots as deferred
+        for (const slot of remainingSlots) {
+            await this.deferSlot(slot);
+            this.state.deferredSlotIds.add(this.getSlotId(slot));
+        }
+        // Wake agent to execute selected slot
+        await this.executeSlot(selectedSlot);
+    }
+    /**
+     * Execute a slot by waking the agent.
+     */
+    async executeSlot(slot) {
+        if (this.state.isProcessing) {
+            this.config.logger.warn('Already processing a slot, deferring new slot');
+            await this.deferSlot(slot);
+            return;
+        }
+        this.state.isProcessing = true;
+        this.state.currentSlot = slot;
+        try {
+            // Mark slot as attended and ongoing before waking agent
+            const update = {
+                status: types_1.SlotStatus.ONGOING,
+                started_at: this.formatTime(new Date()),
+            };
+            let updateSuccess;
+            if (slot.id) {
+                updateSuccess = await this.config.bridge.updateSlot(slot.id, update);
+            }
+            else if (slot.virtual_id) {
+                const updated = await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+                updateSuccess = updated !== null;
+                // Update slot reference if materialized
+                if (updated) {
+                    this.state.currentSlot = updated;
+                }
+            }
+            else {
+                updateSuccess = false;
+            }
+            if (!updateSuccess) {
+                this.config.logger.error('Failed to update slot status before execution');
+                this.state.isProcessing = false;
+                this.state.currentSlot = null;
+                return;
+            }
+            // Report agent status change to backend
+            const newAgentStatus = slot.slot_type === 'on_call' ? 'on_call' : 'busy';
+            await this.config.bridge.reportAgentStatus({ status: newAgentStatus });
+            // Build wake context for agent
+            const wakeContext = this.buildWakeContext(slot);
+            // Wake the agent
+            const wakeSuccess = await this.config.wakeAgent(wakeContext);
+            if (!wakeSuccess) {
+                this.config.logger.error('Failed to wake agent for slot execution');
+                // Revert slot to not_started status
+                await this.revertSlot(slot);
+                await this.config.bridge.reportAgentStatus({ status: 'idle' });
+            }
+            // Note: isProcessing remains true until agent signals completion
+            // This is handled by external completion callback
+        }
+        catch (err) {
+            this.config.logger.error('Error executing slot:', err);
+            this.state.isProcessing = false;
+            this.state.currentSlot = null;
+        }
+    }
+    /**
+     * Build the wake context for an agent based on slot details.
+     */
+    buildWakeContext(slot) {
+        const isVirtual = slot.virtual_id !== null;
+        const slotId = this.getSlotId(slot);
+        // Build task description based on event type
+        let taskDescription;
+        let prompt;
+        if (slot.event_type === 'job' && slot.event_data) {
+            const jobData = slot.event_data;
+            taskDescription = `${jobData.type} ${jobData.code}`;
+            prompt = this.buildJobPrompt(slot, jobData);
+        }
+        else if (slot.event_type === 'system_event' && slot.event_data) {
+            const sysData = slot.event_data;
+            taskDescription = `System Event: ${sysData.event}`;
+            prompt = this.buildSystemPrompt(slot, sysData);
+        }
+        else if (slot.event_type === 'entertainment') {
+            taskDescription = 'Entertainment slot';
+            prompt = this.buildEntertainmentPrompt(slot);
+        }
+        else {
+            taskDescription = `Generic ${slot.slot_type} slot`;
+            prompt = this.buildGenericPrompt(slot);
+        }
+        return {
+            slot,
+            taskDescription,
+            prompt,
+            isVirtual,
+        };
+    }
+    /**
+     * Build prompt for job-type slots.
+     */
+    buildJobPrompt(slot, jobData) {
+        const duration = slot.estimated_duration;
+        const type = jobData.type;
+        const code = jobData.code;
+        return `You have a scheduled ${type} job to work on.
+
+Task Code: ${code}
+Estimated Duration: ${duration} minutes
+Slot Type: ${slot.slot_type}
+Priority: ${slot.priority}
+
+Please focus on this task for the allocated time. When you finish or need to pause,
+report your progress back to the calendar system.
+
+Working sessions: ${jobData.working_sessions?.join(', ') || 'none recorded'}
+
+Start working on ${code} now.`;
+    }
+    /**
+     * Build prompt for system event slots.
+     */
+    buildSystemPrompt(slot, sysData) {
+        switch (sysData.event) {
+            case 'ScheduleToday':
+                return `System Event: Schedule Today
+
+Please review today's calendar and schedule any pending tasks or planning activities.
+Estimated time: ${slot.estimated_duration} minutes.
+
+Check your calendar and plan the day's work.`;
+            case 'SummaryToday':
+                return `System Event: Daily Summary
+
+Please provide a summary of today's activities and progress.
+Estimated time: ${slot.estimated_duration} minutes.
+
+Review what was accomplished and prepare end-of-day notes.`;
+            case 'ScheduledGatewayRestart':
+                return `System Event: Scheduled Gateway Restart
+
+The OpenClaw gateway is scheduled to restart soon.
+Please:
+1. Persist any important state
+2. Complete or gracefully pause current tasks
+3. Prepare for restart
+
+Time remaining: ${slot.estimated_duration} minutes.`;
+            default:
+                return `System Event: ${sysData.event}
+
+A system event has been scheduled. Please handle accordingly.
+Estimated time: ${slot.estimated_duration} minutes.`;
+        }
+    }
+    /**
+     * Build prompt for entertainment slots.
+     */
+    buildEntertainmentPrompt(slot) {
+        return `Scheduled Entertainment Break
+
+Duration: ${slot.estimated_duration} minutes
+
+Take a break and enjoy some leisure time. This slot is reserved for non-work activities
+ to help maintain work-life balance.`;
+    }
+    /**
+     * Build generic prompt for slots without specific event data.
+     */
+    buildGenericPrompt(slot) {
+        return `Scheduled Calendar Slot
+
+Type: ${slot.slot_type}
+Duration: ${slot.estimated_duration} minutes
+Priority: ${slot.priority}
+
+Please use this time for the scheduled activity.`;
+    }
+    /**
+     * Mark a slot as deferred with priority boost.
+     */
+    async deferSlot(slot) {
+        const update = {
+            status: types_1.SlotStatus.DEFERRED,
+        };
+        try {
+            if (slot.id) {
+                await this.config.bridge.updateSlot(slot.id, update);
+            }
+            else if (slot.virtual_id) {
+                await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+            }
+            this.logDebug(`Deferred slot: ${this.getSlotId(slot)}`);
+        }
+        catch (err) {
+            this.config.logger.error('Failed to defer slot:', err);
+        }
+    }
+    /**
+     * Revert a slot to not_started status after failed execution attempt.
+     */
+    async revertSlot(slot) {
+        const update = {
+            status: types_1.SlotStatus.NOT_STARTED,
+            started_at: undefined,
+        };
+        try {
+            if (slot.id) {
+                await this.config.bridge.updateSlot(slot.id, update);
+            }
+            else if (slot.virtual_id) {
+                await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+            }
+        }
+        catch (err) {
+            this.config.logger.error('Failed to revert slot:', err);
+        }
+    }
+    /**
+     * Complete the current slot execution.
+     * Call this when the agent finishes the task.
+     */
+    async completeCurrentSlot(actualDurationMinutes) {
+        if (!this.state.currentSlot) {
+            this.config.logger.warn('No current slot to complete');
+            return;
+        }
+        const slot = this.state.currentSlot;
+        const update = {
+            status: types_1.SlotStatus.FINISHED,
+            actual_duration: actualDurationMinutes,
+        };
+        try {
+            if (slot.id) {
+                await this.config.bridge.updateSlot(slot.id, update);
+            }
+            else if (slot.virtual_id) {
+                await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+            }
+            // Report agent back to idle
+            await this.config.bridge.reportAgentStatus({ status: 'idle' });
+            this.config.logger.info(`Completed slot ${this.getSlotId(slot)}, actual_duration=${actualDurationMinutes}min`);
+        }
+        catch (err) {
+            this.config.logger.error('Failed to complete slot:', err);
+        }
+        finally {
+            this.state.isProcessing = false;
+            this.state.currentSlot = null;
+        }
+    }
+    /**
+     * Abort the current slot execution.
+     * Call this when the agent cannot complete the task.
+     */
+    async abortCurrentSlot(reason) {
+        if (!this.state.currentSlot) {
+            this.config.logger.warn('No current slot to abort');
+            return;
+        }
+        const slot = this.state.currentSlot;
+        const update = {
+            status: types_1.SlotStatus.ABORTED,
+        };
+        try {
+            if (slot.id) {
+                await this.config.bridge.updateSlot(slot.id, update);
+            }
+            else if (slot.virtual_id) {
+                await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+            }
+            // Report agent back to idle
+            await this.config.bridge.reportAgentStatus({ status: 'idle' });
+            this.config.logger.info(`Aborted slot ${this.getSlotId(slot)}${reason ? `: ${reason}` : ''}`);
+        }
+        catch (err) {
+            this.config.logger.error('Failed to abort slot:', err);
+        }
+        finally {
+            this.state.isProcessing = false;
+            this.state.currentSlot = null;
+        }
+    }
+    /**
+     * Pause the current slot execution.
+     * Call this when the agent needs to temporarily pause.
+     */
+    async pauseCurrentSlot() {
+        if (!this.state.currentSlot) {
+            this.config.logger.warn('No current slot to pause');
+            return;
+        }
+        const slot = this.state.currentSlot;
+        const update = {
+            status: types_1.SlotStatus.PAUSED,
+        };
+        try {
+            if (slot.id) {
+                await this.config.bridge.updateSlot(slot.id, update);
+            }
+            else if (slot.virtual_id) {
+                await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+            }
+            this.config.logger.info(`Paused slot ${this.getSlotId(slot)}`);
+        }
+        catch (err) {
+            this.config.logger.error('Failed to pause slot:', err);
+        }
+    }
+    /**
+     * Resume a paused slot.
+     */
+    async resumeCurrentSlot() {
+        if (!this.state.currentSlot) {
+            this.config.logger.warn('No current slot to resume');
+            return;
+        }
+        const slot = this.state.currentSlot;
+        const update = {
+            status: types_1.SlotStatus.ONGOING,
+        };
+        try {
+            if (slot.id) {
+                await this.config.bridge.updateSlot(slot.id, update);
+            }
+            else if (slot.virtual_id) {
+                await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+            }
+            this.config.logger.info(`Resumed slot ${this.getSlotId(slot)}`);
+        }
+        catch (err) {
+            this.config.logger.error('Failed to resume slot:', err);
+        }
+    }
+    /**
+     * Get a stable ID for a slot (real or virtual).
+     */
+    getSlotId(slot) {
+        return slot.id?.toString() || slot.virtual_id || 'unknown';
+    }
+    /**
+     * Format a Date as ISO time string (HH:MM:SS).
+     */
+    formatTime(date) {
+        return date.toTimeString().split(' ')[0];
+    }
+    /**
+     * Debug logging helper.
+     */
+    logDebug(message) {
+        if (this.config.debug) {
+            this.config.logger.debug(`[CalendarScheduler] ${message}`);
+        }
+    }
+    /**
+     * Get current scheduler state (for introspection).
+     */
+    getState() {
+        return { ...this.state };
+    }
+    /**
+     * Check if scheduler is running.
+     */
+    isRunning() {
+        return this.state.isRunning;
+    }
+    /**
+     * Check if currently processing a slot.
+     */
+    isProcessing() {
+        return this.state.isProcessing;
+    }
+    /**
+     * Get the current slot being executed (if any).
+     */
+    getCurrentSlot() {
+        return this.state.currentSlot;
+    }
+}
+exports.CalendarScheduler = CalendarScheduler;
+/**
+ * Factory function to create a CalendarScheduler from plugin context.
+ */
+function createCalendarScheduler(config) {
+    return new CalendarScheduler(config);
+}
+//# sourceMappingURL=scheduler.js.map

plugin/calendar/scheduler.ts

@@ -0,0 +1,670 @@
+/**
+ * HarborForge Calendar Scheduler
+ *
+ * PLG-CAL-002: Plugin-side handling for pending slot execution.
+ *
+ * Responsibilities:
+ *   - Run calendar heartbeat every minute
+ *   - Detect when agent is Idle and slots are pending
+ *   - Wake agent with task context
+ *   - Handle slot status transitions (attended, ongoing, deferred)
+ *   - Manage agent status transitions (idle → busy/on_call)
+ *
+ * Design reference: NEXT_WAVE_DEV_DIRECTION.md §6 (Agent wakeup mechanism)
+ */
+
+import {
+  CalendarBridgeClient,
+} from './calendar-bridge';
+import {
+  CalendarSlotResponse,
+  SlotStatus,
+  AgentStatusValue,
+  SlotAgentUpdate,
+  CalendarEventDataJob,
+  CalendarEventDataSystemEvent,
+} from './types';
+
+export interface CalendarSchedulerConfig {
+  /** Calendar bridge client for backend communication */
+  bridge: CalendarBridgeClient;
+  /** Function to get current agent status from backend */
+  getAgentStatus: () => Promise<AgentStatusValue | null>;
+  /** Function to wake/spawn agent with task context */
+  wakeAgent: (context: AgentWakeContext) => Promise<boolean>;
+  /** Logger instance */
+  logger: {
+    info: (...args: any[]) => void;
+    error: (...args: any[]) => void;
+    debug: (...args: any[]) => void;
+    warn: (...args: any[]) => void;
+  };
+  /** Heartbeat interval in milliseconds (default: 60000) */
+  heartbeatIntervalMs?: number;
+  /** Enable verbose debug logging */
+  debug?: boolean;
+}
+
+/**
+ * Context passed to agent when waking for slot execution.
+ * This is the payload the agent receives to understand what to do.
+ */
+export interface AgentWakeContext {
+  /** The slot to execute */
+  slot: CalendarSlotResponse;
+  /** Human-readable task description */
+  taskDescription: string;
+  /** Prompt/instructions for the agent */
+  prompt: string;
+  /** Whether this is a virtual slot (needs materialization) */
+  isVirtual: boolean;
+}
+
+/**
+ * Current execution state tracked by the scheduler.
+ */
+interface SchedulerState {
+  /** Whether scheduler is currently running */
+  isRunning: boolean;
+  /** Currently executing slot (null if idle) */
+  currentSlot: CalendarSlotResponse | null;
+  /** Last heartbeat timestamp */
+  lastHeartbeatAt: Date | null;
+  /** Interval handle for cleanup */
+  intervalHandle: ReturnType<typeof setInterval> | null;
+  /** Set of slot IDs that have been deferred in current session */
+  deferredSlotIds: Set<string>;
+  /** Whether agent is currently processing a slot */
+  isProcessing: boolean;
+}
+
+/**
+ * CalendarScheduler manages the periodic heartbeat and slot execution lifecycle.
+ */
+export class CalendarScheduler {
+  private config: Required<CalendarSchedulerConfig>;
+  private state: SchedulerState;
+
+  constructor(config: CalendarSchedulerConfig) {
+    this.config = {
+      heartbeatIntervalMs: 60000, // 1 minute default
+      debug: false,
+      ...config,
+    };
+    this.state = {
+      isRunning: false,
+      currentSlot: null,
+      lastHeartbeatAt: null,
+      intervalHandle: null,
+      deferredSlotIds: new Set(),
+      isProcessing: false,
+    };
+  }
+
+  /**
+   * Start the calendar scheduler.
+   * Begins periodic heartbeat to check for pending slots.
+   */
+  start(): void {
+    if (this.state.isRunning) {
+      this.config.logger.warn('Calendar scheduler already running');
+      return;
+    }
+
+    this.state.isRunning = true;
+    this.config.logger.info('Calendar scheduler started');
+
+    // Run initial heartbeat immediately
+    this.runHeartbeat();
+
+    // Schedule periodic heartbeats
+    this.state.intervalHandle = setInterval(
+      () => this.runHeartbeat(),
+      this.config.heartbeatIntervalMs
+    );
+  }
+
+  /**
+   * Stop the calendar scheduler.
+   * Cleans up intervals and resets state.
+   */
+  stop(): void {
+    this.state.isRunning = false;
+
+    if (this.state.intervalHandle) {
+      clearInterval(this.state.intervalHandle);
+      this.state.intervalHandle = null;
+    }
+
+    this.config.logger.info('Calendar scheduler stopped');
+  }
+
+  /**
+   * Execute a single heartbeat cycle.
+   * Fetches pending slots and handles execution logic.
+   */
+  async runHeartbeat(): Promise<void> {
+    if (!this.state.isRunning) {
+      return;
+    }
+
+    this.state.lastHeartbeatAt = new Date();
+
+    try {
+      // Fetch pending slots from backend
+      const response = await this.config.bridge.heartbeat();
+
+      if (!response) {
+        this.logDebug('Heartbeat: backend unreachable');
+        return;
+      }
+
+      this.logDebug(`Heartbeat: ${response.slots.length} slots pending, agent_status=${response.agent_status}`);
+
+      // If agent is not idle, defer all pending slots
+      if (response.agent_status !== 'idle') {
+        await this.handleNonIdleAgent(response.slots, response.agent_status);
+        return;
+      }
+
+      // Agent is idle - handle pending slots
+      await this.handleIdleAgent(response.slots);
+
+    } catch (err) {
+      this.config.logger.error('Heartbeat error:', err);
+    }
+  }
+
+  /**
+   * Handle slots when agent is not idle.
+   * Defer all pending slots with priority boost.
+   */
+  private async handleNonIdleAgent(
+    slots: CalendarSlotResponse[],
+    agentStatus: AgentStatusValue
+  ): Promise<void> {
+    if (slots.length === 0) {
+      return;
+    }
+
+    this.config.logger.info(
+      `Agent not idle (status=${agentStatus}), deferring ${slots.length} slot(s)`
+    );
+
+    for (const slot of slots) {
+      const slotId = this.getSlotId(slot);
+
+      // Skip if already deferred this session
+      if (this.state.deferredSlotIds.has(slotId)) {
+        continue;
+      }
+
+      // Mark slot as deferred with priority boost (+1)
+      await this.deferSlot(slot);
+      this.state.deferredSlotIds.add(slotId);
+    }
+  }
+
+  /**
+   * Handle slots when agent is idle.
+   * Select highest priority slot and wake agent.
+   */
+  private async handleIdleAgent(slots: CalendarSlotResponse[]): Promise<void> {
+    if (slots.length === 0) {
+      return;
+    }
+
+    // Filter out already deferred slots in this session
+    const eligibleSlots = slots.filter(
+      s => !this.state.deferredSlotIds.has(this.getSlotId(s))
+    );
+
+    if (eligibleSlots.length === 0) {
+      this.logDebug('All pending slots have been deferred this session');
+      return;
+    }
+
+    // Select highest priority slot (backend already sorts by priority DESC)
+    const [selectedSlot, ...remainingSlots] = eligibleSlots;
+
+    this.config.logger.info(
+      `Selected slot for execution: id=${this.getSlotId(selectedSlot)}, ` +
+      `type=${selectedSlot.slot_type}, priority=${selectedSlot.priority}`
+    );
+
+    // Mark remaining slots as deferred
+    for (const slot of remainingSlots) {
+      await this.deferSlot(slot);
+      this.state.deferredSlotIds.add(this.getSlotId(slot));
+    }
+
+    // Wake agent to execute selected slot
+    await this.executeSlot(selectedSlot);
+  }
+
+  /**
+   * Execute a slot by waking the agent.
+   */
+  private async executeSlot(slot: CalendarSlotResponse): Promise<void> {
+    if (this.state.isProcessing) {
+      this.config.logger.warn('Already processing a slot, deferring new slot');
+      await this.deferSlot(slot);
+      return;
+    }
+
+    this.state.isProcessing = true;
+    this.state.currentSlot = slot;
+
+    try {
+      // Mark slot as attended and ongoing before waking agent
+      const update: SlotAgentUpdate = {
+        status: SlotStatus.ONGOING,
+        started_at: this.formatTime(new Date()),
+      };
+
+      let updateSuccess: boolean;
+      if (slot.id) {
+        updateSuccess = await this.config.bridge.updateSlot(slot.id, update);
+      } else if (slot.virtual_id) {
+        const updated = await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+        updateSuccess = updated !== null;
+        // Update slot reference if materialized
+        if (updated) {
+          this.state.currentSlot = updated;
+        }
+      } else {
+        updateSuccess = false;
+      }
+
+      if (!updateSuccess) {
+        this.config.logger.error('Failed to update slot status before execution');
+        this.state.isProcessing = false;
+        this.state.currentSlot = null;
+        return;
+      }
+
+      // Report agent status change to backend
+      const newAgentStatus = slot.slot_type === 'on_call' ? 'on_call' : 'busy';
+      await this.config.bridge.reportAgentStatus({ status: newAgentStatus });
+
+      // Build wake context for agent
+      const wakeContext = this.buildWakeContext(slot);
+
+      // Wake the agent
+      const wakeSuccess = await this.config.wakeAgent(wakeContext);
+
+      if (!wakeSuccess) {
+        this.config.logger.error('Failed to wake agent for slot execution');
+        // Revert slot to not_started status
+        await this.revertSlot(slot);
+        await this.config.bridge.reportAgentStatus({ status: 'idle' });
+      }
+
+      // Note: isProcessing remains true until agent signals completion
+      // This is handled by external completion callback
+
+    } catch (err) {
+      this.config.logger.error('Error executing slot:', err);
+      this.state.isProcessing = false;
+      this.state.currentSlot = null;
+    }
+  }
+
+  /**
+   * Build the wake context for an agent based on slot details.
+   */
+  private buildWakeContext(slot: CalendarSlotResponse): AgentWakeContext {
+    const isVirtual = slot.virtual_id !== null;
+    const slotId = this.getSlotId(slot);
+
+    // Build task description based on event type
+    let taskDescription: string;
+    let prompt: string;
+
+    if (slot.event_type === 'job' && slot.event_data) {
+      const jobData = slot.event_data as CalendarEventDataJob;
+      taskDescription = `${jobData.type} ${jobData.code}`;
+      prompt = this.buildJobPrompt(slot, jobData);
+    } else if (slot.event_type === 'system_event' && slot.event_data) {
+      const sysData = slot.event_data as CalendarEventDataSystemEvent;
+      taskDescription = `System Event: ${sysData.event}`;
+      prompt = this.buildSystemPrompt(slot, sysData);
+    } else if (slot.event_type === 'entertainment') {
+      taskDescription = 'Entertainment slot';
+      prompt = this.buildEntertainmentPrompt(slot);
+    } else {
+      taskDescription = `Generic ${slot.slot_type} slot`;
+      prompt = this.buildGenericPrompt(slot);
+    }
+
+    return {
+      slot,
+      taskDescription,
+      prompt,
+      isVirtual,
+    };
+  }
+
+  /**
+   * Build prompt for job-type slots.
+   */
+  private buildJobPrompt(slot: CalendarSlotResponse, jobData: CalendarEventDataJob): string {
+    const duration = slot.estimated_duration;
+    const type = jobData.type;
+    const code = jobData.code;
+
+    return `You have a scheduled ${type} job to work on.
+
+Task Code: ${code}
+Estimated Duration: ${duration} minutes
+Slot Type: ${slot.slot_type}
+Priority: ${slot.priority}
+
+Please focus on this task for the allocated time. When you finish or need to pause,
+report your progress back to the calendar system.
+
+Working sessions: ${jobData.working_sessions?.join(', ') || 'none recorded'}
+
+Start working on ${code} now.`;
+  }
+
+  /**
+   * Build prompt for system event slots.
+   */
+  private buildSystemPrompt(
+    slot: CalendarSlotResponse,
+    sysData: CalendarEventDataSystemEvent
+  ): string {
+    switch (sysData.event) {
+      case 'ScheduleToday':
+        return `System Event: Schedule Today
+
+Please review today's calendar and schedule any pending tasks or planning activities.
+Estimated time: ${slot.estimated_duration} minutes.
+
+Check your calendar and plan the day's work.`;
+
+      case 'SummaryToday':
+        return `System Event: Daily Summary
+
+Please provide a summary of today's activities and progress.
+Estimated time: ${slot.estimated_duration} minutes.
+
+Review what was accomplished and prepare end-of-day notes.`;
+
+      case 'ScheduledGatewayRestart':
+        return `System Event: Scheduled Gateway Restart
+
+The OpenClaw gateway is scheduled to restart soon.
+Please:
+1. Persist any important state
+2. Complete or gracefully pause current tasks
+3. Prepare for restart
+
+Time remaining: ${slot.estimated_duration} minutes.`;
+
+      default:
+        return `System Event: ${sysData.event}
+
+A system event has been scheduled. Please handle accordingly.
+Estimated time: ${slot.estimated_duration} minutes.`;
+    }
+  }
+
+  /**
+   * Build prompt for entertainment slots.
+   */
+  private buildEntertainmentPrompt(slot: CalendarSlotResponse): string {
+    return `Scheduled Entertainment Break
+
+Duration: ${slot.estimated_duration} minutes
+
+Take a break and enjoy some leisure time. This slot is reserved for non-work activities
+ to help maintain work-life balance.`;
+  }
+
+  /**
+   * Build generic prompt for slots without specific event data.
+   */
+  private buildGenericPrompt(slot: CalendarSlotResponse): string {
+    return `Scheduled Calendar Slot
+
+Type: ${slot.slot_type}
+Duration: ${slot.estimated_duration} minutes
+Priority: ${slot.priority}
+
+Please use this time for the scheduled activity.`;
+  }
+
+  /**
+   * Mark a slot as deferred with priority boost.
+   */
+  private async deferSlot(slot: CalendarSlotResponse): Promise<void> {
+    const update: SlotAgentUpdate = {
+      status: SlotStatus.DEFERRED,
+    };
+
+    try {
+      if (slot.id) {
+        await this.config.bridge.updateSlot(slot.id, update);
+      } else if (slot.virtual_id) {
+        await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+      }
+      this.logDebug(`Deferred slot: ${this.getSlotId(slot)}`);
+    } catch (err) {
+      this.config.logger.error('Failed to defer slot:', err);
+    }
+  }
+
+  /**
+   * Revert a slot to not_started status after failed execution attempt.
+   */
+  private async revertSlot(slot: CalendarSlotResponse): Promise<void> {
+    const update: SlotAgentUpdate = {
+      status: SlotStatus.NOT_STARTED,
+      started_at: undefined,
+    };
+
+    try {
+      if (slot.id) {
+        await this.config.bridge.updateSlot(slot.id, update);
+      } else if (slot.virtual_id) {
+        await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+      }
+    } catch (err) {
+      this.config.logger.error('Failed to revert slot:', err);
+    }
+  }
+
+  /**
+   * Complete the current slot execution.
+   * Call this when the agent finishes the task.
+   */
+  async completeCurrentSlot(actualDurationMinutes: number): Promise<void> {
+    if (!this.state.currentSlot) {
+      this.config.logger.warn('No current slot to complete');
+      return;
+    }
+
+    const slot = this.state.currentSlot;
+    const update: SlotAgentUpdate = {
+      status: SlotStatus.FINISHED,
+      actual_duration: actualDurationMinutes,
+    };
+
+    try {
+      if (slot.id) {
+        await this.config.bridge.updateSlot(slot.id, update);
+      } else if (slot.virtual_id) {
+        await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+      }
+
+      // Report agent back to idle
+      await this.config.bridge.reportAgentStatus({ status: 'idle' });
+
+      this.config.logger.info(
+        `Completed slot ${this.getSlotId(slot)}, actual_duration=${actualDurationMinutes}min`
+      );
+
+    } catch (err) {
+      this.config.logger.error('Failed to complete slot:', err);
+    } finally {
+      this.state.isProcessing = false;
+      this.state.currentSlot = null;
+    }
+  }
+
+  /**
+   * Abort the current slot execution.
+   * Call this when the agent cannot complete the task.
+   */
+  async abortCurrentSlot(reason?: string): Promise<void> {
+    if (!this.state.currentSlot) {
+      this.config.logger.warn('No current slot to abort');
+      return;
+    }
+
+    const slot = this.state.currentSlot;
+    const update: SlotAgentUpdate = {
+      status: SlotStatus.ABORTED,
+    };
+
+    try {
+      if (slot.id) {
+        await this.config.bridge.updateSlot(slot.id, update);
+      } else if (slot.virtual_id) {
+        await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+      }
+
+      // Report agent back to idle
+      await this.config.bridge.reportAgentStatus({ status: 'idle' });
+
+      this.config.logger.info(
+        `Aborted slot ${this.getSlotId(slot)}${reason ? `: ${reason}` : ''}`
+      );
+
+    } catch (err) {
+      this.config.logger.error('Failed to abort slot:', err);
+    } finally {
+      this.state.isProcessing = false;
+      this.state.currentSlot = null;
+    }
+  }
+
+  /**
+   * Pause the current slot execution.
+   * Call this when the agent needs to temporarily pause.
+   */
+  async pauseCurrentSlot(): Promise<void> {
+    if (!this.state.currentSlot) {
+      this.config.logger.warn('No current slot to pause');
+      return;
+    }
+
+    const slot = this.state.currentSlot;
+    const update: SlotAgentUpdate = {
+      status: SlotStatus.PAUSED,
+    };
+
+    try {
+      if (slot.id) {
+        await this.config.bridge.updateSlot(slot.id, update);
+      } else if (slot.virtual_id) {
+        await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+      }
+
+      this.config.logger.info(`Paused slot ${this.getSlotId(slot)}`);
+
+    } catch (err) {
+      this.config.logger.error('Failed to pause slot:', err);
+    }
+  }
+
+  /**
+   * Resume a paused slot.
+   */
+  async resumeCurrentSlot(): Promise<void> {
+    if (!this.state.currentSlot) {
+      this.config.logger.warn('No current slot to resume');
+      return;
+    }
+
+    const slot = this.state.currentSlot;
+    const update: SlotAgentUpdate = {
+      status: SlotStatus.ONGOING,
+    };
+
+    try {
+      if (slot.id) {
+        await this.config.bridge.updateSlot(slot.id, update);
+      } else if (slot.virtual_id) {
+        await this.config.bridge.updateVirtualSlot(slot.virtual_id, update);
+      }
+
+      this.config.logger.info(`Resumed slot ${this.getSlotId(slot)}`);
+
+    } catch (err) {
+      this.config.logger.error('Failed to resume slot:', err);
+    }
+  }
+
+  /**
+   * Get a stable ID for a slot (real or virtual).
+   */
+  private getSlotId(slot: CalendarSlotResponse): string {
+    return slot.id?.toString() || slot.virtual_id || 'unknown';
+  }
+
+  /**
+   * Format a Date as ISO time string (HH:MM:SS).
+   */
+  private formatTime(date: Date): string {
+    return date.toTimeString().split(' ')[0];
+  }
+
+  /**
+   * Debug logging helper.
+   */
+  private logDebug(message: string): void {
+    if (this.config.debug) {
+      this.config.logger.debug(`[CalendarScheduler] ${message}`);
+    }
+  }
+
+  /**
+   * Get current scheduler state (for introspection).
+   */
+  getState(): Readonly<SchedulerState> {
+    return { ...this.state };
+  }
+
+  /**
+   * Check if scheduler is running.
+   */
+  isRunning(): boolean {
+    return this.state.isRunning;
+  }
+
+  /**
+   * Check if currently processing a slot.
+   */
+  isProcessing(): boolean {
+    return this.state.isProcessing;
+  }
+
+  /**
+   * Get the current slot being executed (if any).
+   */
+  getCurrentSlot(): CalendarSlotResponse | null {
+    return this.state.currentSlot;
+  }
+}
+
+/**
+ * Factory function to create a CalendarScheduler from plugin context.
+ */
+export function createCalendarScheduler(
+  config: CalendarSchedulerConfig
+): CalendarScheduler {
+  return new CalendarScheduler(config);
+}

plugin/index.ts

@@ -4,6 +4,9 @@
  * Provides monitor-related tools and exposes OpenClaw metadata
  * for the HarborForge Monitor bridge (via monitor_port).
  *
+ * Also integrates with HarborForge Calendar system to wake agents
+ * for scheduled tasks (PLG-CAL-002).
+ *
  * Sidecar architecture has been removed. Telemetry data is now
  * served directly by the plugin when Monitor queries via the
  * local monitor_port communication path.
@@ -11,6 +14,12 @@
 import { hostname, freemem, totalmem, uptime, loadavg, platform } from 'os';
 import { getLivePluginConfig, type HarborForgeMonitorConfig } from './core/live-config';
 import { MonitorBridgeClient, type OpenClawMeta } from './core/monitor-bridge';
+import {
+  createCalendarBridgeClient,
+  createCalendarScheduler,
+  CalendarScheduler,
+  AgentWakeContext,
+} from './calendar';
 
 interface PluginAPI {
   logger: {
@@ -24,6 +33,15 @@ interface PluginAPI {
   pluginConfig?: Record<string, unknown>;
   on: (event: string, handler: () => void) => void;
   registerTool: (factory: (ctx: any) => any) => void;
+  /** Spawn a sub-agent with task context (OpenClaw 2.1+) */
+  spawn?: (options: {
+    agentId?: string;
+    task: string;
+    model?: string;
+    timeoutSeconds?: number;
+  }) => Promise<{ sessionId: string; status: string }>;
+  /** Get current agent status */
+  getAgentStatus?: () => Promise<{ status: string } | null>;
 }
 
 export default {
@@ -87,7 +105,7 @@ export default {
         },
         openclaw: {
           version: api.version || 'unknown',
-          pluginVersion: '0.2.0',
+          pluginVersion: '0.3.0',
         },
         timestamp: new Date().toISOString(),
       };
@@ -96,6 +114,9 @@ export default {
     // Periodic metadata push interval handle
     let metaPushInterval: ReturnType<typeof setInterval> | null = null;
 
+    // Calendar scheduler instance
+    let calendarScheduler: CalendarScheduler | null = null;
+
     /**
      * Push OpenClaw metadata to the Monitor bridge.
      * This enriches Monitor heartbeats with OpenClaw version/plugin/agent info.
@@ -107,7 +128,7 @@ export default {
 
       const meta: OpenClawMeta = {
         version: api.version || 'unknown',
-        plugin_version: '0.2.0',
+        plugin_version: '0.3.0',
         agents: [], // TODO: populate from api agent list when available
       };
 
@@ -119,6 +140,170 @@ export default {
       }
     }
 
+    /**
+     * Get current agent status from OpenClaw.
+     * Falls back to querying backend if OpenClaw API unavailable.
+     */
+    async function getAgentStatus(): Promise<'idle' | 'on_call' | 'busy' | 'exhausted' | 'offline' | null> {
+      // Try OpenClaw API first (if available)
+      if (api.getAgentStatus) {
+        try {
+          const status = await api.getAgentStatus();
+          if (status?.status) {
+            return status.status as 'idle' | 'on_call' | 'busy' | 'exhausted' | 'offline';
+          }
+        } catch (err) {
+          logger.debug('Failed to get agent status from OpenClaw API:', err);
+        }
+      }
+
+      // Fallback: query backend for agent status
+      const live = resolveConfig();
+      const agentId = process.env.AGENT_ID || 'unknown';
+      try {
+        const response = await fetch(`${live.backendUrl}/calendar/agent/status?agent_id=${agentId}`, {
+          headers: {
+            'X-Agent-ID': agentId,
+            'X-Claw-Identifier': live.identifier || hostname(),
+          },
+        });
+        if (response.ok) {
+          const data = await response.json();
+          return data.status;
+        }
+      } catch (err) {
+        logger.debug('Failed to get agent status from backend:', err);
+      }
+
+      return null;
+    }
+
+    /**
+     * Wake/spawn agent with task context for slot execution.
+     * This is the callback invoked by CalendarScheduler when a slot is ready.
+     */
+    async function wakeAgent(context: AgentWakeContext): Promise<boolean> {
+      logger.info(`Waking agent for slot: ${context.taskDescription}`);
+
+      try {
+        // Method 1: Use OpenClaw spawn API if available (preferred)
+        if (api.spawn) {
+          const result = await api.spawn({
+            task: context.prompt,
+            timeoutSeconds: context.slot.estimated_duration * 60, // Convert to seconds
+          });
+
+          if (result?.sessionId) {
+            logger.info(`Agent spawned for calendar slot: session=${result.sessionId}`);
+
+            // Track session completion
+            trackSessionCompletion(result.sessionId, context);
+            return true;
+          }
+        }
+
+        // Method 2: Send notification/alert to wake agent (fallback)
+        // This relies on the agent's heartbeat to check for notifications
+        logger.warn('OpenClaw spawn API not available, using notification fallback');
+
+        // Send calendar wakeup notification via backend
+        const live = resolveConfig();
+        const agentId = process.env.AGENT_ID || 'unknown';
+
+        const notifyResponse = await fetch(`${live.backendUrl}/calendar/agent/notify`, {
+          method: 'POST',
+          headers: {
+            'Content-Type': 'application/json',
+            'X-Agent-ID': agentId,
+            'X-Claw-Identifier': live.identifier || hostname(),
+          },
+          body: JSON.stringify({
+            agent_id: agentId,
+            message: context.prompt,
+            slot_id: context.slot.id || context.slot.virtual_id,
+            task_description: context.taskDescription,
+          }),
+        });
+
+        return notifyResponse.ok;
+
+      } catch (err) {
+        logger.error('Failed to wake agent:', err);
+        return false;
+      }
+    }
+
+    /**
+     * Track session completion and update slot status accordingly.
+     */
+    function trackSessionCompletion(sessionId: string, context: AgentWakeContext): void {
+      // Poll for session completion (simplified approach)
+      // In production, this would use webhooks or event streaming
+      const pollInterval = 30000; // 30 seconds
+      const maxDuration = context.slot.estimated_duration * 60 * 1000; // Convert to ms
+      const startTime = Date.now();
+
+      const poll = async () => {
+        if (!calendarScheduler) return;
+
+        const elapsed = Date.now() - startTime;
+
+        // Check if session is complete (would use actual API in production)
+        // For now, estimate completion based on duration
+        if (elapsed >= maxDuration) {
+          // Assume completion
+          const actualMinutes = Math.round(elapsed / 60000);
+          await calendarScheduler.completeCurrentSlot(actualMinutes);
+          return;
+        }
+
+        // Continue polling
+        setTimeout(poll, pollInterval);
+      };
+
+      // Start polling
+      setTimeout(poll, pollInterval);
+    }
+
+    /**
+     * Initialize and start the calendar scheduler.
+     */
+    function startCalendarScheduler(): void {
+      const live = resolveConfig();
+      const agentId = process.env.AGENT_ID || 'unknown';
+
+      // Create calendar bridge client
+      const calendarBridge = createCalendarBridgeClient(
+        api,
+        live.backendUrl || 'https://monitor.hangman-lab.top',
+        agentId
+      );
+
+      // Create and start scheduler
+      calendarScheduler = createCalendarScheduler({
+        bridge: calendarBridge,
+        getAgentStatus,
+        wakeAgent,
+        logger,
+        heartbeatIntervalMs: 60000, // 1 minute
+        debug: live.logLevel === 'debug',
+      });
+
+      calendarScheduler.start();
+      logger.info('Calendar scheduler started');
+    }
+
+    /**
+     * Stop the calendar scheduler.
+     */
+    function stopCalendarScheduler(): void {
+      if (calendarScheduler) {
+        calendarScheduler.stop();
+        calendarScheduler = null;
+        logger.info('Calendar scheduler stopped');
+      }
+    }
+
     api.on('gateway_start', () => {
       logger.info('HarborForge plugin active');
 
@@ -135,14 +320,22 @@ export default {
         () => pushMetaToMonitor(),
         intervalSec * 1000,
       );
+
+      // Start calendar scheduler (delayed to let everything initialize)
+      if (live.enabled !== false) {
+        setTimeout(() => startCalendarScheduler(), 5000);
+      }
     });
 
     api.on('gateway_stop', () => {
       logger.info('HarborForge plugin stopping');
+
       if (metaPushInterval) {
         clearInterval(metaPushInterval);
         metaPushInterval = null;
       }
+
+      stopCalendarScheduler();
     });
 
     // Tool: plugin status
@@ -165,6 +358,13 @@ export default {
             : { connected: false, error: 'Monitor bridge unreachable' };
         }
 
+        // Get calendar scheduler status
+        const calendarStatus = calendarScheduler ? {
+          running: calendarScheduler.isRunning(),
+          processing: calendarScheduler.isProcessing(),
+          currentSlot: calendarScheduler.getCurrentSlot(),
+        } : null;
+
         return {
           enabled: live.enabled !== false,
           config: {
@@ -175,6 +375,7 @@ export default {
             hasApiKey: Boolean(live.apiKey),
           },
           monitorBridge,
+          calendar: calendarStatus,
           telemetry: collectTelemetry(),
         };
       },
@@ -220,6 +421,75 @@ export default {
       },
     }));
 
+    // Tool: calendar slot management
+    api.registerTool(() => ({
+      name: 'harborforge_calendar_status',
+      description: 'Get current calendar scheduler status and pending slots',
+      parameters: {
+        type: 'object',
+        properties: {},
+      },
+      async execute() {
+        if (!calendarScheduler) {
+          return { error: 'Calendar scheduler not running' };
+        }
+
+        return {
+          running: calendarScheduler.isRunning(),
+          processing: calendarScheduler.isProcessing(),
+          currentSlot: calendarScheduler.getCurrentSlot(),
+          state: calendarScheduler.getState(),
+        };
+      },
+    }));
+
+    // Tool: complete current slot (for agent to report completion)
+    api.registerTool(() => ({
+      name: 'harborforge_calendar_complete',
+      description: 'Complete the current calendar slot with actual duration',
+      parameters: {
+        type: 'object',
+        properties: {
+          actualDurationMinutes: {
+            type: 'number',
+            description: 'Actual time spent on the task in minutes',
+          },
+        },
+        required: ['actualDurationMinutes'],
+      },
+      async execute(params: { actualDurationMinutes: number }) {
+        if (!calendarScheduler) {
+          return { error: 'Calendar scheduler not running' };
+        }
+
+        await calendarScheduler.completeCurrentSlot(params.actualDurationMinutes);
+        return { success: true, message: 'Slot completed' };
+      },
+    }));
+
+    // Tool: abort current slot (for agent to report failure)
+    api.registerTool(() => ({
+      name: 'harborforge_calendar_abort',
+      description: 'Abort the current calendar slot',
+      parameters: {
+        type: 'object',
+        properties: {
+          reason: {
+            type: 'string',
+            description: 'Reason for aborting',
+          },
+        },
+      },
+      async execute(params: { reason?: string }) {
+        if (!calendarScheduler) {
+          return { error: 'Calendar scheduler not running' };
+        }
+
+        await calendarScheduler.abortCurrentSlot(params.reason);
+        return { success: true, message: 'Slot aborted' };
+      },
+    }));
+
     logger.info('HarborForge plugin registered (id: harbor-forge)');
   },
 };