diff --git a/src/services/context/ObservationCompiler.ts b/src/services/context/ObservationCompiler.ts
index 76fad159..a55e873c 100644
--- a/src/services/context/ObservationCompiler.ts
+++ b/src/services/context/ObservationCompiler.ts
@@ -5,10 +5,10 @@
  */
 
 import path from 'path';
-import { homedir } from 'os';
 import { existsSync, readFileSync } from 'fs';
 import { SessionStore } from '../sqlite/SessionStore.js';
 import { logger } from '../../utils/logger.js';
+import { CLAUDE_CONFIG_DIR } from '../../shared/paths.js';
 import type {
   ContextConfig,
   Observation,
@@ -203,7 +203,8 @@ export function getPriorSessionMessages(
 
   const priorSessionId = priorSessionObs.memory_session_id;
   const dashedCwd = cwdToDashed(cwd);
-  const transcriptPath = path.join(homedir(), '.claude', 'projects', dashedCwd, `${priorSessionId}.jsonl`);
+  // Use CLAUDE_CONFIG_DIR to support custom Claude config directories
+  const transcriptPath = path.join(CLAUDE_CONFIG_DIR, 'projects', dashedCwd, `${priorSessionId}.jsonl`);
   return extractPriorMessages(transcriptPath);
 }
 
diff --git a/src/services/infrastructure/HealthMonitor.ts b/src/services/infrastructure/HealthMonitor.ts
index d0e86864..46eb9316 100644
--- a/src/services/infrastructure/HealthMonitor.ts
+++ b/src/services/infrastructure/HealthMonitor.ts
@@ -10,9 +10,9 @@
  */
 
 import path from 'path';
-import { homedir } from 'os';
 import { readFileSync } from 'fs';
 import { logger } from '../../utils/logger.js';
+import { MARKETPLACE_ROOT } from '../../shared/paths.js';
 
 /**
  * Check if a port is in use by querying the health endpoint
@@ -100,8 +100,7 @@ export async function httpShutdown(port: number): Promise<boolean> {
  * This is the "expected" version that should be running
  */
 export function getInstalledPluginVersion(): string {
-  const marketplaceRoot = path.join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack');
-  const packageJsonPath = path.join(marketplaceRoot, 'package.json');
+  const packageJsonPath = path.join(MARKETPLACE_ROOT, 'package.json');
   const packageJson = JSON.parse(readFileSync(packageJsonPath, 'utf-8'));
   return packageJson.version;
 }
diff --git a/src/services/integrations/CursorHooksInstaller.ts b/src/services/integrations/CursorHooksInstaller.ts
index 7e485d6e..311c55f6 100644
--- a/src/services/integrations/CursorHooksInstaller.ts
+++ b/src/services/integrations/CursorHooksInstaller.ts
@@ -16,6 +16,7 @@ import { exec } from 'child_process';
 import { promisify } from 'util';
 import { logger } from '../../utils/logger.js';
 import { getWorkerPort } from '../../shared/worker-utils.js';
+import { DATA_DIR, MARKETPLACE_ROOT, CLAUDE_CONFIG_DIR } from '../../shared/paths.js';
 import {
   readCursorRegistry as readCursorRegistryFromFile,
   writeCursorRegistry as writeCursorRegistryToFile,
@@ -27,7 +28,6 @@ import type { CursorInstallTarget, CursorHooksJson, CursorMcpConfig, Platform }
 const execAsync = promisify(exec);
 
 // Standard paths
-const DATA_DIR = path.join(homedir(), '.claude-mem');
 const CURSOR_REGISTRY_FILE = path.join(DATA_DIR, 'cursor-projects.json');
 
 // ============================================================================
@@ -133,7 +133,7 @@ export async function updateCursorContextForProject(projectName: string, port: n
 export function findCursorHooksDir(): string | null {
   const possiblePaths = [
     // Marketplace install location
-    path.join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack', 'cursor-hooks'),
+    path.join(MARKETPLACE_ROOT, 'cursor-hooks'),
     // Development/source location (relative to built worker-service.cjs in plugin/scripts/)
     path.join(path.dirname(__filename), '..', '..', 'cursor-hooks'),
     // Alternative dev location
@@ -156,7 +156,7 @@ export function findCursorHooksDir(): string | null {
 export function findMcpServerPath(): string | null {
   const possiblePaths = [
     // Marketplace install location
-    path.join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack', 'plugin', 'scripts', 'mcp-server.cjs'),
+    path.join(MARKETPLACE_ROOT, 'plugin', 'scripts', 'mcp-server.cjs'),
     // Development/source location (relative to built worker-service.cjs in plugin/scripts/)
     path.join(path.dirname(__filename), 'mcp-server.cjs'),
     // Alternative dev location
@@ -178,7 +178,7 @@ export function findMcpServerPath(): string | null {
 export function findWorkerServicePath(): string | null {
   const possiblePaths = [
     // Marketplace install location
-    path.join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack', 'plugin', 'scripts', 'worker-service.cjs'),
+    path.join(MARKETPLACE_ROOT, 'plugin', 'scripts', 'worker-service.cjs'),
     // Development/source location (relative to built worker-service.cjs in plugin/scripts/)
     path.join(path.dirname(__filename), 'worker-service.cjs'),
     // Alternative dev location
@@ -596,8 +596,8 @@ export async function detectClaudeCode(): Promise<boolean> {
     logger.debug('SYSTEM', 'Claude CLI not in PATH', {}, error as Error);
   }
 
-  // Check for Claude Code plugin directory
-  const pluginDir = path.join(homedir(), '.claude', 'plugins');
+  // Check for Claude Code plugin directory (respects CLAUDE_CONFIG_DIR)
+  const pluginDir = path.join(CLAUDE_CONFIG_DIR, 'plugins');
   if (existsSync(pluginDir)) {
     return true;
   }
diff --git a/src/services/worker/BranchManager.ts b/src/services/worker/BranchManager.ts
index 26ed5c45..4027af45 100644
--- a/src/services/worker/BranchManager.ts
+++ b/src/services/worker/BranchManager.ts
@@ -7,11 +7,12 @@
 
 import { execSync, spawnSync } from 'child_process';
 import { existsSync, unlinkSync } from 'fs';
-import { homedir } from 'os';
 import { join } from 'path';
 import { logger } from '../../utils/logger.js';
+import { MARKETPLACE_ROOT } from '../../shared/paths.js';
 
-const INSTALLED_PLUGIN_PATH = join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack');
+// Alias for code clarity - this is the installed plugin path
+const INSTALLED_PLUGIN_PATH = MARKETPLACE_ROOT;
 
 /**
  * Validate branch name to prevent command injection
diff --git a/src/shared/paths.ts b/src/shared/paths.ts
index ca7e7aba..09561198 100644
--- a/src/shared/paths.ts
+++ b/src/shared/paths.ts
@@ -28,6 +28,9 @@ export const DATA_DIR = SettingsDefaultsManager.get('CLAUDE_MEM_DATA_DIR');
 // Note: CLAUDE_CONFIG_DIR is a Claude Code setting, not claude-mem, so leave as env var
 export const CLAUDE_CONFIG_DIR = process.env.CLAUDE_CONFIG_DIR || join(homedir(), '.claude');
 
+// Plugin installation directory - respects CLAUDE_CONFIG_DIR for users with custom Claude locations
+export const MARKETPLACE_ROOT = join(CLAUDE_CONFIG_DIR, 'plugins', 'marketplaces', 'thedotmack');
+
 // Data subdirectories
 export const ARCHIVES_DIR = join(DATA_DIR, 'archives');
 export const LOGS_DIR = join(DATA_DIR, 'logs');
diff --git a/src/shared/worker-utils.ts b/src/shared/worker-utils.ts
index a8b77fca..255cf3f5 100644
--- a/src/shared/worker-utils.ts
+++ b/src/shared/worker-utils.ts
@@ -1,11 +1,9 @@
 import path from "path";
-import { homedir } from "os";
 import { readFileSync } from "fs";
 import { logger } from "../utils/logger.js";
 import { HOOK_TIMEOUTS, getTimeout } from "./hook-constants.js";
 import { SettingsDefaultsManager } from "./SettingsDefaultsManager.js";
-
-const MARKETPLACE_ROOT = path.join(homedir(), '.claude', 'plugins', 'marketplaces', 'thedotmack');
+import { MARKETPLACE_ROOT } from "./paths.js";
 
 // Named constants for health checks
 const HEALTH_CHECK_TIMEOUT_MS = getTimeout(HOOK_TIMEOUTS.HEALTH_CHECK);