diff --git a/‎packages/knip/fixtures/plugins/typescript/package.json‎
Lines changed: 1 addition & 0 deletions b/‎packages/knip/fixtures/plugins/typescript/package.json‎
Lines changed: 1 addition & 0 deletions
diff --git a/‎packages/knip/fixtures/plugins/typescript/tsconfig.content-mapper.json‎
Lines changed: 4 additions & 1 deletion b/‎packages/knip/fixtures/plugins/typescript/tsconfig.content-mapper.json‎
Lines changed: 4 additions & 1 deletion
diff --git a/‎packages/knip/src/plugins/typescript/index.ts‎
Lines changed: 14 additions & 1 deletion b/‎packages/knip/src/plugins/typescript/index.ts‎
Lines changed: 14 additions & 1 deletion
diff --git a/‎packages/knip/src/types/tsconfig-json.ts‎
Lines changed: 1 addition & 0 deletions b/‎packages/knip/src/types/tsconfig-json.ts‎
Lines changed: 1 addition & 0 deletions
diff --git a/‎packages/knip/test/plugins/typescript.test.ts‎
Lines changed: 3 additions & 1 deletion b/‎packages/knip/test/plugins/typescript.test.ts‎
Lines changed: 3 additions & 1 deletion
@@ -10,6 +10,7 @@
   },
   "devDependencies": {
     "ember-content-mapper": "*",
+    "remark-gfm": "*",
     "@tsconfig/node16": "*",
     "@tsconfig/node20": "*",
     "@tsconfig/node22": "*",
 
@@ -2,7 +2,10 @@
   "contentMappers": [
     {
       "package": "@mdx-js/content-mapper",
-      "extensions": [".mdx"]
+      "extensions": [".mdx"],
+      "options": {
+        "remarkPlugins": ["remark-gfm", ["remark-math", {}], "remark-mdx-frontmatter"]
+      }
     },
     {
       "package": "ember-content-mapper",
 
@@ -19,6 +19,9 @@ const config = ['tsconfig.json', 'package.json'];
 
 const packageJsonPath = 'typescript.contentMapper';
 
+const mdxContentMappers = ['mdx-content-mapper', '@mdx-js/content-mapper'];
+const mdxTransformerPlugins = ['remark-mdx-frontmatter'];
+
 const resolveContentMapper = ({ exec }: ContentMapperManifest, options: PluginOptions) => {
   if (!Array.isArray(exec) || exec.some(arg => typeof arg !== 'string')) return [];
   return options
@@ -42,7 +45,17 @@ const resolveTsConfig = (localConfig: TsConfigJson, options: PluginOptions) => {
       ?.filter(reference => reference.path.endsWith('.json'))
       .map(reference => toConfig('typescript', reference.path, { containingFilePath: options.configFilePath })) ?? [];
 
-  const contentMappers = localConfig.contentMappers?.map(contentMapper => toDependency(contentMapper.package)) ?? [];
+  const contentMappers = [];
+  for (const { package: name, options: mapperOptions } of localConfig.contentMappers ?? []) {
+    contentMappers.push(toDependency(name));
+    if (!mdxContentMappers.includes(name)) continue;
+    const remarkPlugins = mapperOptions?.remarkPlugins;
+    if (!Array.isArray(remarkPlugins)) continue;
+    for (const plugin of remarkPlugins) {
+      const id = typeof plugin === 'string' ? plugin : plugin[0];
+      if (typeof id === 'string' && !mdxTransformerPlugins.includes(id)) contentMappers.push(toDependency(id));
+    }
+  }
 
   if (!(compilerOptions && localConfig)) return compact([...contentMappers, ...extend, ...references]);
 
 
@@ -8,6 +8,7 @@ export interface TsConfigJson {
   };
   contentMappers?: {
     package: string;
+    options?: { remarkPlugins?: Array<string | [string, ...unknown[]]> };
   }[];
   references?: Array<{ path: string }>;
 }
 
@@ -15,6 +15,8 @@ test('Find dependencies with the TypeScript plugin', async () => {
   assert(issues.unresolved['tsconfig.json']['ts-graphql-plugin']);
   assert(issues.unresolved['tsconfig.json']['tslib']); // resolved up to dep of knip itself
   assert(issues.unlisted['tsconfig.content-mapper.json']['@mdx-js/content-mapper']);
+  assert(issues.unlisted['tsconfig.content-mapper.json']['remark-math']);
+  assert(!issues.unlisted['tsconfig.content-mapper.json']['remark-mdx-frontmatter']);
   assert(issues.unlisted['tsconfig.jsx-import-source-preact.json']['preact']);
   assert(issues.unresolved['tsconfig.jsx-import-source-preact.json']['preact']);
   assert(issues.unresolved['tsconfig.jsx-import-source-react.json']['vitest/globals']);
@@ -23,7 +25,7 @@ test('Find dependencies with the TypeScript plugin', async () => {
   assert.deepEqual(counters, {
     ...baseCounters,
     binaries: 1,
-    unlisted: 3,
+    unlisted: 4,
     unresolved: 5,
     processed: 0,
     total: 0,
Original file line number	Diff line number	Diff line change
`@@ -2,7 +2,10 @@`
`2`	`2`	`"contentMappers": [`
`3`	`3`	`{`
`4`	`4`	`"package": "@mdx-js/content-mapper",`
`5`		`- "extensions": [".mdx"]`
	`5`	`+ "extensions": [".mdx"],`
	`6`	`+ "options": {`
	`7`	`+ "remarkPlugins": ["remark-gfm", ["remark-math", {}], "remark-mdx-frontmatter"]`
	`8`	`+ }`
`6`	`9`	`},`
`7`	`10`	`{`
`8`	`11`	`"package": "ember-content-mapper",`
Original file line number	Diff line number	Diff line change
`@@ -8,6 +8,7 @@ export interface TsConfigJson {`
`8`	`8`	`};`
`9`	`9`	`contentMappers?: {`
`10`	`10`	`package: string;`
	`11`	`+ options?: { remarkPlugins?: Array<string \| [string, ...unknown[]]> };`
`11`	`12`	`}[];`
`12`	`13`	`references?: Array<{ path: string }>;`
`13`	`14`	`}`