diff --git a/components/Icons/index.tsx b/components/Icons/index.tsx
index 69ee5d65..bed48de0 100644
--- a/components/Icons/index.tsx
+++ b/components/Icons/index.tsx
@@ -1253,3 +1253,23 @@ export function SecurityIcon({ style }: IconProps) {
     </Svg>
   );
 }
+
+export function LintToolsIcon({ style }: IconProps) {
+  return (
+    <Svg
+      viewBox="0 0 256 256"
+      style={[tw`size-5`, style]}
+      fill="none"
+      stroke="currentColor"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      strokeWidth="16">
+      <line x1="128" y1="128" x2="216" y2="128" fill="none" stroke="currentColor" />
+      <line x1="128" y1="64" x2="216" y2="64" fill="none" stroke="currentColor" />
+      <line x1="128" y1="192" x2="216" y2="192" fill="none" stroke="currentColor" />
+      <polyline points="40 64 56 80 88 48" fill="none" stroke="currentColor" strokeWidth="20" />
+      <polyline points="40 128 56 144 88 112" fill="none" stroke="currentColor" strokeWidth="20" />
+      <polyline points="40 192 56 208 88 176" fill="none" stroke="currentColor" strokeWidth="20" />
+    </Svg>
+  );
+}
diff --git a/components/Library/MetaData.tsx b/components/Library/MetaData.tsx
index 964f677c..87545f00 100644
--- a/components/Library/MetaData.tsx
+++ b/components/Library/MetaData.tsx
@@ -12,6 +12,7 @@ import {
   ForkIcon,
   IssueIcon,
   LicenseIcon,
+  LintToolsIcon,
   ModuleIcon,
   NativeCodeIcon,
   NightlyTestIcon,
@@ -25,7 +26,7 @@ import { ConfigPluginContent } from '~/components/Library/ConfigPlugin';
 import { Tooltip } from '~/components/Tooltip';
 import { type LibraryDataEntryType, type LibraryType, type MetadataEntryType } from '~/types';
 import { formatBytes } from '~/util/formatBytes';
-import { formatPackageManager, pluralize } from '~/util/strings';
+import { formatLintTools, formatPackageManager, pluralize } from '~/util/strings';
 import tw from '~/util/tailwind';
 
 import { DirectoryScore } from './DirectoryScore';
@@ -266,6 +267,16 @@ function generateSecondaryData(library: LibraryType, skipExamples: boolean): Met
           tooltip: 'Package manager',
         }
       : null,
+    skipExamples && (github?.lintTools?.length ?? 0) > 0
+      ? {
+          id: 'lintTools',
+          icon: <LintToolsIcon style={iconColor} />,
+          content: (
+            <P style={paragraphStyles}>{github.lintTools?.map(formatLintTools).join(', ')}</P>
+          ),
+          tooltip: 'Lint tools',
+        }
+      : null,
   ];
 }
 
@@ -291,7 +302,7 @@ function MetaData({ library, secondary, skipExamples = false }: Props) {
           );
 
           return tooltip ? (
-            <Tooltip key={id} sideOffset={-2} delayDuration={250} trigger={component}>
+            <Tooltip key={id} sideOffset={-2} side="left" delayDuration={250} trigger={component}>
               {tooltip}
             </Tooltip>
           ) : (
diff --git a/scripts/fetch-github-data.ts b/scripts/fetch-github-data.ts
index 93337eae..10f94dfe 100644
--- a/scripts/fetch-github-data.ts
+++ b/scripts/fetch-github-data.ts
@@ -4,6 +4,7 @@ import { type LibraryLicenseType, type LibraryType } from '~/types';
 import detectModuleType from '~/util/github/detectModuleType';
 import hasConfigPlugin from '~/util/github/hasConfigPlugin';
 import {
+  detectLintStack,
   detectPackageManager,
   hasCCFile,
   hasChangelogFile,
@@ -252,5 +253,6 @@ function createRepoDataWithResponse(json: any, monorepo: boolean): LibraryType['
       json.packageManager ??
       detectPackageManager(json.files) ??
       detectPackageManager(json.rootFiles),
+    lintTools: detectLintStack(json.files) ?? detectLintStack(json.rootFiles),
   };
 }
diff --git a/types/index.ts b/types/index.ts
index 08365383..f0338e87 100644
--- a/types/index.ts
+++ b/types/index.ts
@@ -101,6 +101,7 @@ export type LibraryType = LibraryDataEntryType & {
     configPlugin?: boolean;
     moduleType?: 'expo' | 'nitro' | 'turbo';
     packageManager?: string;
+    lintTools?: string[];
     urls: {
       repo: string;
       homepage?: string | null;
diff --git a/util/github/hasFiles.ts b/util/github/hasFiles.ts
index 28647cee..c4237446 100644
--- a/util/github/hasFiles.ts
+++ b/util/github/hasFiles.ts
@@ -2,41 +2,41 @@ import { type RepositoryTreeNode } from '~/types';
 
 type RootFiles = { entries: RepositoryTreeNode[] } | null;
 
-function hasMatchingFiles(rootFiles: RootFiles, fileNames: string[]) {
+function hasMatchingFiles(rootFiles: RootFiles, fileNames: Set<string>) {
   if (!rootFiles?.entries.length) {
     return false;
   }
 
   return rootFiles.entries.some(
-    node => fileNames.includes(node.name.toLowerCase()) && node.type === 'blob'
+    node => fileNames.has(node.name.toLowerCase()) && node.type === 'blob'
   );
 }
 
-const README_FILE_NAMES = ['readme', 'readme.md', 'readme.mdx'];
+const README_FILE_NAMES = new Set(['readme', 'readme.md', 'readme.mdx']);
 
 export function hasReadmeFile(rootFiles: RootFiles) {
   return hasMatchingFiles(rootFiles, README_FILE_NAMES);
 }
 
-const CONTRIBUTING_FILE_NAMES = ['contributing.md'];
+const CONTRIBUTING_FILE_NAMES = new Set(['contributing.md']);
 
 export function hasContributingFile(rootFiles: RootFiles) {
   return hasMatchingFiles(rootFiles, CONTRIBUTING_FILE_NAMES);
 }
 
-const CHANGELOG_FILE_NAMES = ['changelog.md'];
+const CHANGELOG_FILE_NAMES = new Set(['changelog.md']);
 
 export function hasChangelogFile(rootFiles: RootFiles) {
   return hasMatchingFiles(rootFiles, CHANGELOG_FILE_NAMES);
 }
 
-const CC_FILE_NAMES = ['code_of_conduct.md'];
+const CC_FILE_NAMES = new Set(['code_of_conduct.md']);
 
 export function hasCCFile(rootFiles: RootFiles) {
   return hasMatchingFiles(rootFiles, CC_FILE_NAMES);
 }
 
-const SECURITY_FILE_NAMES = ['security.md'];
+const SECURITY_FILE_NAMES = new Set(['security.md']);
 
 export function hasSecurityFile(rootFiles: RootFiles) {
   return hasMatchingFiles(rootFiles, SECURITY_FILE_NAMES);
@@ -44,24 +44,89 @@ export function hasSecurityFile(rootFiles: RootFiles) {
 
 export function detectPackageManager(rootFiles: RootFiles) {
   // LOCKS
-  if (hasMatchingFiles(rootFiles, ['bun.lock', 'bun.lockb'])) {
+  if (hasMatchingFiles(rootFiles, new Set(['bun.lock', 'bun.lockb']))) {
     return 'bun';
-  } else if (hasMatchingFiles(rootFiles, ['pnpm-lock.yaml', 'shrinkwrap.yaml'])) {
+  } else if (hasMatchingFiles(rootFiles, new Set(['pnpm-lock.yaml', 'shrinkwrap.yaml']))) {
     return 'pnpm';
-  } else if (hasMatchingFiles(rootFiles, ['yarn.lock'])) {
+  } else if (hasMatchingFiles(rootFiles, new Set(['yarn.lock']))) {
     return 'yarn';
-  } else if (hasMatchingFiles(rootFiles, ['package-lock.json', 'shrinkwrap.json'])) {
+  } else if (hasMatchingFiles(rootFiles, new Set(['package-lock.json', 'shrinkwrap.json']))) {
     return 'npm';
   }
   // CONFIGS
-  if (hasMatchingFiles(rootFiles, ['bunfig.toml'])) {
+  if (hasMatchingFiles(rootFiles, new Set(['bunfig.toml']))) {
     return 'bun';
-  } else if (hasMatchingFiles(rootFiles, ['.pnpm-workspace.yaml', '.pnpmfile.cjs'])) {
+  } else if (hasMatchingFiles(rootFiles, new Set(['.pnpm-workspace.yaml', '.pnpmfile.cjs']))) {
     return 'pnpm';
-  } else if (hasMatchingFiles(rootFiles, ['.yarnrc'])) {
+  } else if (hasMatchingFiles(rootFiles, new Set(['.yarnrc']))) {
     return 'yarn@1';
-  } else if (hasMatchingFiles(rootFiles, ['.yarnrc.yml'])) {
+  } else if (hasMatchingFiles(rootFiles, new Set(['.yarnrc.yml']))) {
     return 'yarn@2+';
   }
   return undefined;
 }
+
+const OXLINT_CONFIG_FILE_NAMES = new Set([
+  '.oxlintrc.json',
+  '.oxlintrc.jsonc',
+  'oxlint.config.mts',
+  'oxlint.config.ts',
+  'oxlint.config.mjs',
+  'oxlint.config.js',
+]);
+const OXFMT_CONFIG_FILE_NAMES = new Set([
+  '.oxfmtrc.json',
+  '.oxfmtrc.jsonc',
+  'oxfmt.config.mts',
+  'oxfmt.config.ts',
+  'oxfmt.config.mjs',
+  'oxfmt.config.js',
+]);
+const ESLINT_CONFIG_FILE_NAMES = new Set([
+  'eslint.config.js',
+  'eslint.config.mjs',
+  'eslint.config.cjs',
+  'eslint.config.ts',
+  'eslint.config.mjs',
+  'eslint.config.cjs',
+  '.eslintrc.js',
+  '.eslintrc.cjs',
+  '.eslintrc.json',
+  '.eslintrc.yaml',
+  '.eslintrc.yml',
+]);
+const PRETTIER_CONFIG_FILE_NAMES = new Set([
+  '.prettierrc',
+  '.prettierrc.json',
+  '.prettierrc.json5',
+  '.prettierrc.yaml',
+  '.prettierrc.yml',
+  '.prettierrc.js',
+  '.prettierrc.cjs',
+  '.prettierrc.toml',
+  '.prettierrc.mjs',
+  'prettier.config.js',
+  'prettier.config.cjs',
+  'prettier.config.mjs',
+]);
+const BIOME_CONFIG_FILE_NAMES = new Set(['biome.json', 'biome.jsonc']);
+
+export function detectLintStack(rootFiles: RootFiles) {
+  const lintTools = [];
+  if (hasMatchingFiles(rootFiles, OXLINT_CONFIG_FILE_NAMES)) {
+    lintTools.push('oxlint');
+  }
+  if (hasMatchingFiles(rootFiles, OXFMT_CONFIG_FILE_NAMES)) {
+    lintTools.push('oxfmt');
+  }
+  if (hasMatchingFiles(rootFiles, ESLINT_CONFIG_FILE_NAMES)) {
+    lintTools.push('eslint');
+  }
+  if (hasMatchingFiles(rootFiles, PRETTIER_CONFIG_FILE_NAMES)) {
+    lintTools.push('prettier');
+  }
+  if (hasMatchingFiles(rootFiles, BIOME_CONFIG_FILE_NAMES)) {
+    lintTools.push('biome');
+  }
+  return lintTools;
+}
diff --git a/util/strings.ts b/util/strings.ts
index 095b6d67..32573b2b 100644
--- a/util/strings.ts
+++ b/util/strings.ts
@@ -61,6 +61,22 @@ export function formatPackageManager(pmRaw?: string) {
   }
 }
 
+export function formatLintTools(lintTool: string) {
+  if (lintTool === 'oxlint') {
+    return 'Oxlint';
+  } else if (lintTool === 'oxfmt') {
+    return 'Oxfmt';
+  } else if (lintTool === 'eslint') {
+    return 'ESLint';
+  } else if (lintTool === 'prettier') {
+    return 'Prettier';
+  } else if (lintTool === 'biome') {
+    return 'Biome';
+  } else {
+    return lintTool;
+  }
+}
+
 export function childrenToText(children: ReactNode): string {
   return Children.toArray(children)
     .map(child => {