diff --git a/src/commands/scan.test.ts b/src/commands/scan.test.ts
index 08345af..067d131 100644
--- a/src/commands/scan.test.ts
+++ b/src/commands/scan.test.ts
@@ -436,11 +436,13 @@ describe('crawlers module', () => {
         getNpmGlobalPrefix,
         getYarnGlobalPrefix,
         getPnpmGlobalPrefix,
+        getBunGlobalPrefix,
       } = await import('../crawlers/index.js')
 
       assert.equal(typeof getNpmGlobalPrefix, 'function')
       assert.equal(typeof getYarnGlobalPrefix, 'function')
       assert.equal(typeof getPnpmGlobalPrefix, 'function')
+      assert.equal(typeof getBunGlobalPrefix, 'function')
     })
   })
 })
diff --git a/src/crawlers/index.ts b/src/crawlers/index.ts
index 78235e9..094936a 100644
--- a/src/crawlers/index.ts
+++ b/src/crawlers/index.ts
@@ -4,4 +4,5 @@ export {
   getNpmGlobalPrefix,
   getYarnGlobalPrefix,
   getPnpmGlobalPrefix,
+  getBunGlobalPrefix,
 } from './npm-crawler.js'
diff --git a/src/crawlers/npm-crawler.ts b/src/crawlers/npm-crawler.ts
index 3c2727e..a8ec43a 100644
--- a/src/crawlers/npm-crawler.ts
+++ b/src/crawlers/npm-crawler.ts
@@ -104,6 +104,42 @@ function getPnpmGlobalPrefix(): string | null {
   }
 }
 
+/**
+ * Get the bun global node_modules path
+ */
+function getBunGlobalPrefix(): string | null {
+  try {
+    const binPath = execSync('bun pm bin -g', {
+      encoding: 'utf-8',
+      stdio: ['pipe', 'pipe', 'pipe'],
+    }).trim()
+    const bunRoot = path.dirname(binPath)
+    return path.join(bunRoot, 'install', 'global', 'node_modules')
+  } catch {
+    return null
+  }
+}
+
+/**
+ * Get the deno global npm cache path
+ */
+function getDenoGlobalPrefix(): string | null {
+  try {
+    const result = execSync('deno info --json', {
+      encoding: 'utf-8',
+      stdio: ['pipe', 'pipe', 'pipe'],
+    })
+    const info = JSON.parse(result)
+    // Deno stores npm packages at: denoDir/npm/registry.npmjs.org/
+    if (info.denoDir) {
+      return path.join(info.denoDir, 'npm', 'registry.npmjs.org')
+    }
+    return null
+  } catch {
+    return null
+  }
+}
+
 /**
  * NPM ecosystem crawler for discovering packages in node_modules
  */
@@ -150,6 +186,18 @@ export class NpmCrawler {
       paths.push(yarnPath)
     }
 
+    // Try bun global path
+    const bunPath = getBunGlobalPrefix()
+    if (bunPath) {
+      paths.push(bunPath)
+    }
+
+    // Try deno global path
+    const denoPath = getDenoGlobalPrefix()
+    if (denoPath) {
+      paths.push(denoPath)
+    }
+
     return paths
   }
 
@@ -498,4 +546,10 @@ export class NpmCrawler {
 }
 
 // Re-export global prefix functions for backward compatibility
-export { getNpmGlobalPrefix, getYarnGlobalPrefix, getPnpmGlobalPrefix }
+export {
+  getNpmGlobalPrefix,
+  getYarnGlobalPrefix,
+  getPnpmGlobalPrefix,
+  getBunGlobalPrefix,
+  getDenoGlobalPrefix,
+}
diff --git a/src/utils/global-packages.ts b/src/utils/global-packages.ts
index 5f14441..f581a7e 100644
--- a/src/utils/global-packages.ts
+++ b/src/utils/global-packages.ts
@@ -51,6 +51,44 @@ export function getPnpmGlobalPrefix(): string | null {
   }
 }
 
+/**
+ * Get the bun global node_modules path
+ * @returns The path to bun's global node_modules directory, or null if not available
+ */
+export function getBunGlobalPrefix(): string | null {
+  try {
+    const binPath = execSync('bun pm bin -g', {
+      encoding: 'utf-8',
+      stdio: ['pipe', 'pipe', 'pipe'],
+    }).trim()
+    const bunRoot = path.dirname(binPath)
+    return path.join(bunRoot, 'install', 'global', 'node_modules')
+  } catch {
+    return null
+  }
+}
+
+/**
+ * Get the deno global npm cache path
+ * @returns The path to deno's npm cache directory, or null if not available
+ */
+export function getDenoGlobalPrefix(): string | null {
+  try {
+    const result = execSync('deno info --json', {
+      encoding: 'utf-8',
+      stdio: ['pipe', 'pipe', 'pipe'],
+    })
+    const info = JSON.parse(result)
+    // Deno stores npm packages at: denoDir/npm/registry.npmjs.org/
+    if (info.denoDir) {
+      return path.join(info.denoDir, 'npm', 'registry.npmjs.org')
+    }
+    return null
+  } catch {
+    return null
+  }
+}
+
 /**
  * Get the global node_modules path, with support for custom override
  * @param customPrefix - Optional custom path to use instead of auto-detection
@@ -65,7 +103,7 @@ export function getGlobalPrefix(customPrefix?: string): string {
 
 /**
  * Get all global node_modules paths for package lookup
- * Currently returns npm global path, but could be extended for yarn global, etc.
+ * Returns paths from all detected package managers (npm, pnpm, yarn, bun)
  * @param customPrefix - Optional custom path to use instead of auto-detection
  * @returns Array of global node_modules paths
  */
@@ -73,7 +111,36 @@ export function getGlobalNodeModulesPaths(customPrefix?: string): string[] {
   if (customPrefix) {
     return [customPrefix]
   }
-  return [getNpmGlobalPrefix()]
+
+  const paths: string[] = []
+
+  try {
+    paths.push(getNpmGlobalPrefix())
+  } catch {
+    // npm not available
+  }
+
+  const pnpmPath = getPnpmGlobalPrefix()
+  if (pnpmPath) {
+    paths.push(pnpmPath)
+  }
+
+  const yarnPath = getYarnGlobalPrefix()
+  if (yarnPath) {
+    paths.push(yarnPath)
+  }
+
+  const bunPath = getBunGlobalPrefix()
+  if (bunPath) {
+    paths.push(bunPath)
+  }
+
+  const denoPath = getDenoGlobalPrefix()
+  if (denoPath) {
+    paths.push(denoPath)
+  }
+
+  return paths
 }
 
 /**