@stackmemoryai/stackmemory/dist/src/core/context/dual-stack-manager.js

Project-scoped memory for AI coding tools. Durable context across sessions with MCP integration, frames, smart retrieval, Claude Code skills, and automatic hooks.

import { fileURLToPath as __fileURLToPath } from 'url';
import { dirname as __pathDirname } from 'path';
const __filename = __fileURLToPath(import.meta.url);
const __dirname = __pathDirname(__filename);
import { FrameManager } from "./index.js";
import { SQLiteAdapter } from "../database/sqlite-adapter.js";
import { logger } from "../monitoring/logger.js";
import { ValidationError, DatabaseError, ErrorCode } from "../errors/index.js";
import {
  validateInput,
  CreateSharedStackSchema,
  SwitchStackSchema
} from "./validation.js";
import { PermissionManager } from "./permission-manager.js";
class DualStackManager {
  adapter;
  individualStack;
  sharedStacks = /* @__PURE__ */ new Map();
  activeContext;
  handoffRequests = /* @__PURE__ */ new Map();
  permissionManager;
  constructor(adapter, projectId, userId, defaultTeamId) {
    this.adapter = adapter;
    this.permissionManager = new PermissionManager();
    const rawDb = adapter instanceof SQLiteAdapter ? adapter.getRawDatabase() : null;
    if (!rawDb) {
      throw new DatabaseError(
        "DualStackManager requires SQLiteAdapter with connected database",
        ErrorCode.DB_CONNECTION_FAILED,
        { adapter: adapter.constructor.name }
      );
    }
    this.individualStack = new FrameManager(rawDb, projectId, userId);
    this.activeContext = {
      stackId: `individual-${userId}`,
      type: "individual",
      projectId,
      ownerId: userId,
      permissions: this.getDefaultIndividualPermissions(),
      metadata: {},
      createdAt: /* @__PURE__ */ new Date(),
      lastActive: /* @__PURE__ */ new Date()
    };
    this.permissionManager.setStackPermissions(
      userId,
      `individual-${userId}`,
      this.getDefaultIndividualPermissions()
    );
    this.initializeSchema();
  }
  async initializeSchema() {
    try {
      await this.adapter.beginTransaction();
      const createStackContextsTable = `
        CREATE TABLE IF NOT EXISTS stack_contexts (
          stack_id TEXT PRIMARY KEY,
          type TEXT NOT NULL CHECK (type IN ('individual', 'shared')),
          project_id TEXT NOT NULL,
          owner_id TEXT,
          team_id TEXT,
          permissions TEXT NOT NULL,
          metadata TEXT DEFAULT '{}',
          created_at INTEGER NOT NULL,
          last_active INTEGER NOT NULL,
          CONSTRAINT valid_ownership CHECK (
            (type = 'individual' AND owner_id IS NOT NULL AND team_id IS NULL) OR
            (type = 'shared' AND team_id IS NOT NULL)
          )
        )
      `;
      const createHandoffRequestsTable = `
        CREATE TABLE IF NOT EXISTS handoff_requests (
          request_id TEXT PRIMARY KEY,
          source_stack_id TEXT NOT NULL,
          target_stack_id TEXT NOT NULL,
          frame_ids TEXT NOT NULL,
          requester_id TEXT NOT NULL,
          target_user_id TEXT,
          message TEXT,
          status TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('pending', 'accepted', 'rejected', 'expired')),
          created_at INTEGER NOT NULL,
          expires_at INTEGER NOT NULL,
          FOREIGN KEY (source_stack_id) REFERENCES stack_contexts(stack_id),
          FOREIGN KEY (target_stack_id) REFERENCES stack_contexts(stack_id)
        )
      `;
      const createStackSyncLogTable = `
        CREATE TABLE IF NOT EXISTS stack_sync_log (
          sync_id TEXT PRIMARY KEY,
          source_stack_id TEXT NOT NULL,
          target_stack_id TEXT NOT NULL,
          operation TEXT NOT NULL CHECK (operation IN ('handoff', 'merge', 'sync')),
          frame_count INTEGER NOT NULL,
          conflicts TEXT DEFAULT '[]',
          resolution TEXT,
          timestamp INTEGER NOT NULL,
          FOREIGN KEY (source_stack_id) REFERENCES stack_contexts(stack_id),
          FOREIGN KEY (target_stack_id) REFERENCES stack_contexts(stack_id)
        )
      `;
      if (this.adapter.isConnected()) {
        await this.adapter.execute?.(createStackContextsTable) || this.executeSchemaQuery(createStackContextsTable);
        await this.adapter.execute?.(createHandoffRequestsTable) || this.executeSchemaQuery(createHandoffRequestsTable);
        await this.adapter.execute?.(createStackSyncLogTable) || this.executeSchemaQuery(createStackSyncLogTable);
      }
      await this.adapter.commitTransaction();
      logger.info("Dual stack schema initialized successfully");
    } catch (error) {
      await this.adapter.rollbackTransaction();
      logger.error("Failed to initialize dual stack schema", error);
      throw new DatabaseError(
        "Schema initialization failed",
        ErrorCode.DB_SCHEMA_ERROR,
        { adapter: this.adapter.constructor.name },
        error instanceof Error ? error : void 0
      );
    }
  }
  async executeSchemaQuery(sql) {
    logger.debug(
      "Using fallback schema creation - implement execute method in adapter"
    );
    const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
    if (rawDb) {
      try {
        rawDb.exec(sql);
        logger.debug("Executed schema query successfully");
      } catch (error) {
        logger.error("Failed to execute schema query", { sql, error });
        throw error;
      }
    } else {
      throw new DatabaseError(
        "Cannot execute schema query: raw database not available",
        ErrorCode.DB_CONNECTION_FAILED,
        { operation: "executeSchemaQuery" }
      );
    }
  }
  getDefaultIndividualPermissions() {
    return {
      canRead: true,
      canWrite: true,
      canHandoff: true,
      canMerge: true,
      canAdminister: true
    };
  }
  getSharedStackPermissions(role) {
    const basePermissions = {
      canRead: true,
      canWrite: true,
      canHandoff: true,
      canMerge: false,
      canAdminister: false
    };
    switch (role) {
      case "lead":
        return { ...basePermissions, canMerge: true };
      case "admin":
        return { ...basePermissions, canMerge: true, canAdminister: true };
      default:
        return basePermissions;
    }
  }
  /**
   * Switch between individual and shared stacks
   */
  async switchToStack(stackId) {
    const input = validateInput(SwitchStackSchema, { stackId });
    try {
      if (input.stackId.startsWith("individual-")) {
        this.activeContext = {
          ...this.activeContext,
          stackId: input.stackId,
          type: "individual"
        };
        return;
      }
      const stackContext = await this.loadStackContext(input.stackId);
      if (!stackContext) {
        throw new ValidationError(
          `Stack context not found: ${input.stackId}`,
          ErrorCode.STACK_CONTEXT_NOT_FOUND
        );
      }
      await this.permissionManager.enforcePermission(
        this.permissionManager.createContext(
          this.activeContext.ownerId || "unknown",
          "read",
          "stack",
          input.stackId,
          stackContext
        )
      );
      this.activeContext = stackContext;
      if (!this.sharedStacks.has(input.stackId)) {
        const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
        if (!rawDb) {
          throw new DatabaseError(
            "Failed to get raw database for shared stack",
            ErrorCode.DB_CONNECTION_FAILED,
            { stackId: input.stackId, operation: "switchToStack" }
          );
        }
        const sharedStack = new FrameManager(
          rawDb,
          stackContext.projectId,
          input.stackId
        );
        this.sharedStacks.set(input.stackId, sharedStack);
      }
      await this.updateStackActivity(input.stackId);
      logger.info(`Switched to stack: ${input.stackId}`, {
        type: stackContext.type
      });
    } catch (error) {
      throw new ValidationError(
        `Failed to switch to stack: ${input.stackId}`,
        ErrorCode.OPERATION_FAILED,
        { stackId: input.stackId },
        error instanceof Error ? error : void 0
      );
    }
  }
  /**
   * Get the current active stack manager
   */
  getActiveStack() {
    if (this.activeContext.type === "individual") {
      return this.individualStack;
    }
    const sharedStack = this.sharedStacks.get(this.activeContext.stackId);
    if (!sharedStack) {
      throw new DatabaseError(
        `Active shared stack not initialized: ${this.activeContext.stackId}`,
        ErrorCode.INVALID_STATE
      );
    }
    return sharedStack;
  }
  /**
   * Create a new shared stack for team collaboration
   */
  async createSharedStack(teamId, name, ownerId, permissions) {
    const input = validateInput(CreateSharedStackSchema, {
      teamId,
      name,
      ownerId,
      permissions
    });
    await this.permissionManager.enforcePermission(
      this.permissionManager.createContext(
        input.ownerId,
        "administer",
        "stack",
        `shared-${input.teamId}`,
        this.activeContext
      )
    );
    const stackId = `shared-${input.teamId}-${Date.now()}`;
    const stackContext = {
      stackId,
      type: "shared",
      projectId: this.activeContext.projectId,
      teamId: input.teamId,
      permissions: input.permissions || this.getSharedStackPermissions("admin"),
      metadata: { name: input.name, ownerId: input.ownerId },
      createdAt: /* @__PURE__ */ new Date(),
      lastActive: /* @__PURE__ */ new Date()
    };
    try {
      await this.saveStackContext(stackContext);
      const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
      if (!rawDb) {
        throw new DatabaseError(
          "Failed to get raw database for new shared stack",
          ErrorCode.DB_CONNECTION_FAILED,
          { teamId, operation: "createSharedStack" }
        );
      }
      const sharedStack = new FrameManager(
        rawDb,
        stackContext.projectId,
        stackId
      );
      this.sharedStacks.set(stackId, sharedStack);
      const stackPermissions = stackContext.permissions;
      this.permissionManager.setStackPermissions(
        input.ownerId,
        stackId,
        stackPermissions
      );
      logger.info(`Created shared stack: ${stackId}`, { teamId, name });
      return stackId;
    } catch (error) {
      throw new DatabaseError(
        `Failed to create shared stack`,
        ErrorCode.OPERATION_FAILED,
        { teamId, name },
        error instanceof Error ? error : void 0
      );
    }
  }
  /**
   * Initiate handoff of frames between stacks
   */
  async initiateHandoff(targetStackId, frameIds, targetUserId, message) {
    await this.permissionManager.enforcePermission(
      this.permissionManager.createContext(
        this.activeContext.ownerId || "unknown",
        "handoff",
        "stack",
        this.activeContext.stackId,
        this.activeContext
      )
    );
    const requestId = `handoff-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
    const request = {
      requestId,
      sourceStackId: this.activeContext.stackId,
      targetStackId,
      frameIds,
      requesterId: this.activeContext.ownerId,
      targetUserId,
      message,
      status: "pending",
      createdAt: /* @__PURE__ */ new Date(),
      expiresAt: new Date(Date.now() + 24 * 60 * 60 * 1e3)
      // 24 hours
    };
    try {
      await this.saveHandoffRequest(request);
      this.handoffRequests.set(requestId, request);
      logger.info(`Initiated handoff request: ${requestId}`, {
        sourceStack: this.activeContext.stackId,
        targetStack: targetStackId,
        frameCount: frameIds.length
      });
      return requestId;
    } catch (error) {
      throw new DatabaseError(
        `Failed to initiate handoff`,
        ErrorCode.OPERATION_FAILED,
        { targetStackId, frameIds },
        error instanceof Error ? error : void 0
      );
    }
  }
  /**
   * Accept a handoff request and move frames
   */
  async acceptHandoff(requestId) {
    logger.debug("acceptHandoff called", { requestId });
    const request = await this.loadHandoffRequest(requestId);
    logger.debug("loadHandoffRequest returned", {
      requestId,
      found: !!request
    });
    if (!request) {
      logger.error("Handoff request not found", {
        requestId,
        availableRequests: Array.from(this.handoffRequests.keys())
      });
      throw new DatabaseError(
        `Handoff request not found: ${requestId}`,
        ErrorCode.RESOURCE_NOT_FOUND
      );
    }
    if (request.status !== "pending") {
      throw new DatabaseError(
        `Handoff request is not pending: ${request.status}`,
        ErrorCode.INVALID_STATE
      );
    }
    if (request.expiresAt < /* @__PURE__ */ new Date()) {
      throw new DatabaseError(
        `Handoff request has expired`,
        ErrorCode.OPERATION_EXPIRED
      );
    }
    try {
      logger.debug("Starting moveFramesBetweenStacks", { requestId });
      const syncResult = await this.moveFramesBetweenStacks(
        request.sourceStackId,
        request.targetStackId,
        request.frameIds
      );
      logger.debug("moveFramesBetweenStacks completed", {
        requestId,
        success: syncResult.success
      });
      logger.debug("Updating request status", { requestId });
      request.status = "accepted";
      logger.debug("Calling saveHandoffRequest", { requestId });
      await this.saveHandoffRequest(request);
      logger.debug("saveHandoffRequest completed", { requestId });
      logger.info(`Accepted handoff request: ${requestId}`, {
        frameCount: request.frameIds.length,
        conflicts: syncResult.conflictFrames.length
      });
      return syncResult;
    } catch (error) {
      logger.error("acceptHandoff caught error", {
        error: error instanceof Error ? error.message : error
      });
      request.status = "rejected";
      await this.saveHandoffRequest(request);
      throw new DatabaseError(
        `Failed to accept handoff`,
        ErrorCode.OPERATION_FAILED,
        { requestId },
        error instanceof Error ? error : void 0
      );
    }
  }
  /**
   * Sync frames between individual and shared stacks
   */
  async syncStacks(sourceStackId, targetStackId, options) {
    try {
      const sourceStack = this.getStackManager(sourceStackId);
      const targetStack = this.getStackManager(targetStackId);
      const framesToSync = options.frameIds || (await sourceStack.getActiveFrames()).map((f) => f.frame_id);
      const result = {
        success: true,
        conflictFrames: [],
        mergedFrames: [],
        errors: []
      };
      for (const frameId of framesToSync) {
        try {
          const sourceFrame = await sourceStack.getFrame(frameId);
          if (!sourceFrame) {
            result.errors.push({
              frameId,
              error: "Source frame not found",
              resolution: "skipped"
            });
            continue;
          }
          const existingFrame = await targetStack.getFrame(frameId);
          if (existingFrame) {
            switch (options.conflictResolution) {
              case "skip":
                result.conflictFrames.push(frameId);
                result.errors.push({
                  frameId,
                  error: "Frame already exists",
                  resolution: "skipped"
                });
                continue;
              case "merge":
                if (!options.dryRun) {
                  await this.mergeFrames(
                    existingFrame,
                    sourceFrame,
                    targetStack
                  );
                }
                result.mergedFrames.push(frameId);
                break;
              case "overwrite":
                if (!options.dryRun) {
                  await targetStack.deleteFrame(frameId);
                  await this.copyFrame(sourceFrame, targetStack);
                }
                result.mergedFrames.push(frameId);
                break;
            }
          } else {
            if (!options.dryRun) {
              await this.copyFrame(sourceFrame, targetStack);
            }
            result.mergedFrames.push(frameId);
          }
        } catch (error) {
          result.errors.push({
            frameId,
            error: error instanceof Error ? error.message : String(error),
            resolution: "skipped"
          });
          result.success = false;
        }
      }
      logger.info(`Stack sync completed`, {
        source: sourceStackId,
        target: targetStackId,
        merged: result.mergedFrames.length,
        conflicts: result.conflictFrames.length,
        errors: result.errors.length
      });
      return result;
    } catch (error) {
      throw new DatabaseError(
        `Stack sync failed`,
        ErrorCode.OPERATION_FAILED,
        { sourceStackId, targetStackId },
        error instanceof Error ? error : void 0
      );
    }
  }
  getStackManager(stackId) {
    logger.debug("getStackManager called", {
      stackId,
      availableStacks: Array.from(this.sharedStacks.keys())
    });
    if (stackId.startsWith("individual-")) {
      logger.debug("Returning individual stack", { stackId });
      return this.individualStack;
    }
    const sharedStack = this.sharedStacks.get(stackId);
    if (!sharedStack) {
      logger.error("Stack manager not found", {
        stackId,
        availableSharedStacks: Array.from(this.sharedStacks.keys()),
        message: "getStackManager could not find shared stack"
      });
      throw new DatabaseError(
        `Stack manager not found: ${stackId}`,
        ErrorCode.RESOURCE_NOT_FOUND
      );
    }
    logger.debug("Returning shared stack", { stackId });
    return sharedStack;
  }
  async moveFramesBetweenStacks(sourceStackId, targetStackId, frameIds) {
    const syncResult = await this.syncStacks(sourceStackId, targetStackId, {
      frameIds,
      conflictResolution: "merge"
    });
    if (syncResult.success && syncResult.errors.length === 0) {
      const sourceStack = this.getStackManager(sourceStackId);
      for (const frameId of frameIds) {
        try {
          sourceStack.deleteFrame(frameId);
          logger.debug("Deleted frame from source stack", {
            frameId,
            sourceStackId
          });
        } catch (error) {
          logger.warn("Failed to delete frame from source stack", {
            frameId,
            error
          });
        }
      }
      logger.debug("Completed frame cleanup from source stack", {
        frameIds: frameIds.length
      });
    }
    return syncResult;
  }
  async copyFrame(frame, targetStack) {
    await targetStack.createFrame({
      type: frame.type,
      name: frame.name,
      inputs: frame.inputs
    });
    const events = await this.individualStack.getFrameEvents(frame.frame_id);
    for (const event of events) {
      await targetStack.addEvent(frame.frame_id, {
        type: event.type,
        text: event.text,
        metadata: event.metadata
      });
    }
    const anchors = await this.individualStack.getFrameAnchors(frame.frame_id);
    for (const anchor of anchors) {
      await targetStack.addAnchor(frame.frame_id, {
        type: anchor.type,
        text: anchor.text,
        priority: anchor.priority,
        metadata: anchor.metadata
      });
    }
  }
  async mergeFrames(existingFrame, sourceFrame, targetStack) {
    const sourceEvents = await this.individualStack.getFrameEvents(
      sourceFrame.frame_id
    );
    for (const event of sourceEvents) {
      await targetStack.addEvent(existingFrame.frame_id, {
        type: event.type,
        text: event.text,
        metadata: { ...event.metadata, merged: true }
      });
    }
    const sourceAnchors = await this.individualStack.getFrameAnchors(
      sourceFrame.frame_id
    );
    for (const anchor of sourceAnchors) {
      await targetStack.addAnchor(existingFrame.frame_id, {
        type: anchor.type,
        text: anchor.text,
        priority: anchor.priority,
        metadata: { ...anchor.metadata, merged: true }
      });
    }
  }
  async loadStackContext(stackId) {
    try {
      const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
      if (!rawDb) {
        return null;
      }
      const query = rawDb.prepare(`
        SELECT stack_id, type, project_id, owner_id, team_id, permissions, metadata, created_at, last_active
        FROM stack_contexts 
        WHERE stack_id = ?
      `);
      const row = query.get(stackId);
      if (!row) {
        return null;
      }
      return {
        stackId: row.stack_id,
        type: row.type,
        projectId: row.project_id,
        ownerId: row.owner_id,
        teamId: row.team_id,
        permissions: JSON.parse(row.permissions),
        metadata: JSON.parse(row.metadata || "{}"),
        createdAt: new Date(row.created_at),
        lastActive: new Date(row.last_active)
      };
    } catch (error) {
      logger.error("Failed to load stack context", { stackId, error });
      return null;
    }
  }
  async saveStackContext(context) {
    try {
      const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
      if (!rawDb) {
        throw new DatabaseError(
          "SQLite database not available for stack context save",
          ErrorCode.DB_CONNECTION_FAILED,
          { stackId: context.stackId, operation: "saveStackContext" }
        );
      }
      const query = rawDb.prepare(`
        INSERT OR REPLACE INTO stack_contexts 
        (stack_id, type, project_id, owner_id, team_id, permissions, metadata, created_at, last_active)
        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
      `);
      query.run(
        context.stackId,
        context.type,
        context.projectId,
        context.ownerId || null,
        context.teamId || null,
        JSON.stringify(context.permissions),
        JSON.stringify(context.metadata || {}),
        context.createdAt.getTime(),
        context.lastActive.getTime()
      );
      logger.debug("Saved stack context", { stackId: context.stackId });
    } catch (error) {
      logger.error("Failed to save stack context", {
        stackId: context.stackId,
        error
      });
      throw error;
    }
  }
  async updateStackActivity(stackId) {
    try {
      const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
      if (!rawDb) {
        logger.warn("SQLite database not available for activity update");
        return;
      }
      const query = rawDb.prepare(`
        UPDATE stack_contexts 
        SET last_active = ?
        WHERE stack_id = ?
      `);
      query.run(Date.now(), stackId);
      logger.debug("Updated stack activity", { stackId });
    } catch (error) {
      logger.error("Failed to update stack activity", { stackId, error });
    }
  }
  async loadHandoffRequest(requestId) {
    const memoryRequest = this.handoffRequests.get(requestId);
    if (memoryRequest) {
      return memoryRequest;
    }
    try {
      const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
      if (rawDb) {
        const query = rawDb.prepare(`
          SELECT * FROM handoff_requests WHERE request_id = ?
        `);
        const row = query.get(requestId);
        if (row) {
          const request = {
            requestId: row.request_id,
            sourceStackId: row.source_stack_id,
            targetStackId: row.target_stack_id,
            frameIds: JSON.parse(row.frame_ids),
            status: row.status,
            createdAt: new Date(row.created_at),
            expiresAt: new Date(row.expires_at),
            targetUserId: row.target_user_id,
            message: row.message
          };
          this.handoffRequests.set(requestId, request);
          return request;
        }
      }
    } catch (error) {
      logger.error("Failed to load handoff request from database", {
        requestId,
        error
      });
    }
    return null;
  }
  async saveHandoffRequest(request) {
    try {
      const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
      if (rawDb) {
        const query = rawDb.prepare(`
          INSERT OR REPLACE INTO handoff_requests 
          (request_id, source_stack_id, target_stack_id, frame_ids, status, created_at, expires_at, target_user_id, message)
          VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
        `);
        query.run(
          request.requestId,
          request.sourceStackId,
          request.targetStackId,
          JSON.stringify(request.frameIds),
          request.status,
          request.createdAt.getTime(),
          request.expiresAt.getTime(),
          request.targetUserId || null,
          request.message || null
        );
        logger.debug("Saved handoff request to database", {
          requestId: request.requestId
        });
      }
      this.handoffRequests.set(request.requestId, request);
    } catch (error) {
      logger.error("Failed to save handoff request", {
        requestId: request.requestId,
        error
      });
      this.handoffRequests.set(request.requestId, request);
    }
  }
  /**
   * Get list of available stacks for the current user
   */
  async getAvailableStacks() {
    try {
      const stacks = [];
      stacks.push(this.activeContext);
      const rawDb = this.adapter instanceof SQLiteAdapter ? this.adapter.getRawDatabase() : null;
      if (rawDb) {
        const query = rawDb.prepare(`
          SELECT stack_id, type, project_id, owner_id, team_id, permissions, metadata, created_at, last_active
          FROM stack_contexts 
          WHERE type = 'shared' AND project_id = ?
        `);
        const rows = query.all(this.activeContext.projectId);
        for (const row of rows) {
          const context = {
            stackId: row.stack_id,
            type: row.type,
            projectId: row.project_id,
            ownerId: row.owner_id,
            teamId: row.team_id,
            permissions: JSON.parse(row.permissions),
            metadata: JSON.parse(row.metadata || "{}"),
            createdAt: new Date(row.created_at),
            lastActive: new Date(row.last_active)
          };
          try {
            await this.permissionManager.enforcePermission(
              this.permissionManager.createContext(
                this.activeContext.ownerId || "unknown",
                "read",
                "stack",
                context.stackId,
                context
              )
            );
            stacks.push(context);
          } catch (permissionError) {
            logger.debug("User lacks access to stack", {
              stackId: context.stackId,
              userId: this.activeContext.ownerId
            });
          }
        }
      }
      return stacks;
    } catch (error) {
      logger.error("Failed to get available stacks", error);
      return [this.activeContext];
    }
  }
  /**
   * Get pending handoff requests for the current user
   */
  async getPendingHandoffRequests() {
    return Array.from(this.handoffRequests.values()).filter(
      (request) => request.status === "pending" && request.expiresAt > /* @__PURE__ */ new Date()
    );
  }
  /**
   * Get current stack context
   */
  getCurrentContext() {
    return { ...this.activeContext };
  }
  /**
   * Get permission manager for external access
   */
  getPermissionManager() {
    return this.permissionManager;
  }
  /**
   * Add user to shared stack with specific permissions
   */
  async addUserToSharedStack(stackId, userId, permissions, requesterId) {
    await this.permissionManager.enforcePermission(
      this.permissionManager.createContext(
        requesterId,
        "administer",
        "stack",
        stackId
      )
    );
    this.permissionManager.setStackPermissions(userId, stackId, permissions);
    logger.info(`Added user to shared stack`, {
      stackId,
      userId,
      permissions,
      requesterId
    });
  }
  /**
   * Remove user from shared stack
   */
  async removeUserFromSharedStack(stackId, userId, requesterId) {
    await this.permissionManager.enforcePermission(
      this.permissionManager.createContext(
        requesterId,
        "administer",
        "stack",
        stackId
      )
    );
    const userPermissions = this.permissionManager.getUserPermissions(userId);
    userPermissions.delete(stackId);
    logger.info(`Removed user from shared stack`, {
      stackId,
      userId,
      requesterId
    });
  }
}
export {
  DualStackManager
};
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