ChromeDevTools/chrome-devtools-mcp

Chrome DevTools for coding agents

TypeScript★ 50,722+148 that day#5 on trending

Analyzed September 3, 2026 at b2007ab (main) with jscpd 5.4.0 in 0.1s.

0.8%duplicated code · 180 of 22,589 lines

16clones in code

129code files of 265 scanned

9.5%duplicated over all files · 391 clones

The code number leaves out tests, fixtures, docs, examples, data files, styles, translations and vendored code, and 1 generated file: src/config/cli-options.ts.

Largest clones in the code

13 lines in 4 placestypescript61 tokens

src/tools/memory.ts:187–199src/tools/memory.ts:292–304src/tools/memory.ts:341–355src/tools/memory.ts:446–458

187  'Loads a memory heapsnapshot and returns retainers for a specific node ID.',
188annotations: {
189  category: ToolCategory.MEMORY,
190  readOnlyHint: true,
191  conditions: ['memoryDebugging'],
192},
193blockedByDialog: false,
194verifyFilesSchema: {
195  filePath: true,
196},

First 10 of 13 lines.

6 lines in 4 placestypescript51 tokens

src/tools/memory.ts:199–204src/tools/memory.ts:315–320src/tools/memory.ts:427–432src/tools/memory.ts:510–515

199  nodeId: zod.number().describe('The node ID to get retainers for.'),
200  pageIdx: zod.number().optional().describe('The page index for pagination.'),
201  pageSize: zod.number().optional().describe('The page size for pagination.'),
202},
203handler: async (request, response, context) => {
204  const retainers = await context.getHeapSnapshotRetainers(

315    .describe('Whether to exclude primitive target nodes. Default is true.'),
316  pageIdx: zod.number().optional().describe('The page index for pagination.'),
317  pageSize: zod.number().optional().describe('The page size for pagination.'),
318},
319handler: async (request, response, context) => {
320  const edges = await context.getHeapSnapshotEdges(

26 lines in 2 placestypescript67 tokens

scripts/eval_scenarios/lighthouse_a11y_test.ts:12–37scripts/eval_scenarios/lighthouse_best_practices_test.ts:12–37

12prompt: 'Check a11y issues on the page at <TEST_URL>',
13maxTurns: 3,
14htmlRoute: {
15  path: '/lighthouse_test.html',
16  htmlContent: `
17    <!DOCTYPE html>
18    <html>
19      <head>
20        <title>Lighthouse Audit Test</title>
21      </head>

First 10 of 26 lines.

7 more

14 lines in 2 placestypescript66 tokens
scripts/profile/scenarios/navigation.ts:13–26 scripts/profile/scenarios/navigation.ts:17–30
10 lines in 2 placestypescript65 tokens
src/devtools/DevtoolsUtils.ts:334–343 src/devtools/DevtoolsUtils.ts:355–365
9 lines in 2 placestypescript63 tokens
scripts/generate-cli.ts:175–183 scripts/generate-docs.ts:337–345
14 lines in 2 placestypescript61 tokens
src/tools/screenshot.ts:48–61 src/tools/screenshot.ts:77–90
10 lines in 2 placestypescript59 tokens
src/McpPage.ts:416–425 src/utils/WaitForHelper.ts:112–121
9 lines in 2 placestypescript59 tokens
src/McpResponse.ts:951–959 src/McpResponse.ts:973–981
8 lines in 2 placestypescript58 tokens
src/processors/HeapSnapshotManager.ts:209–216 src/processors/HeapSnapshotManager.ts:267–274

Largest clones over all files, tests and data included

24 lines in 5 placestypescripttests127 tokens

tests/tools/console.test.ts:507–530tests/tools/console.test.ts:536–559tests/tools/console.test.ts:565–588tests/tools/console.test.ts:594–617tests/tools/console.test.ts:623–646

507    `);
508});
509server.addHtmlRoute(
510  '/index.html',
511  `<script src="${server.getRoute('/main.min.js')}"></script>`,
512);
513
514await withMcpContext(async (response, context) => {
515  const page = context.getSelectedMcpPage();
516  await page.pptrPage.goto(server.getRoute('/index.html'));

First 10 of 24 lines.

14 lines in 8 placestypescripttests66 tokens

tests/tools/memory.test.ts:69–82tests/tools/memory.test.ts:116–128tests/tools/memory.test.ts:138–150tests/tools/memory.test.ts:193–206tests/tools/memory.test.ts:366–378and 3 more

69  {params: {filePath}},
70  response,
71  context,
72);
73
74// Call handle to trigger formatting (similar to network tests)
75const responseData = await response.handle(context);
76const output = responseData.content
77  .map(c => (c.type === 'text' ? c.text : ''))
78  .join('\n');

116  {params: {filePath, filterName: 'objectsRetainedByContexts'}},
117  response,
118  context,
119);
120
121const responseData = await response.handle(context);
122const output = responseData.content
123  .map(c => (c.type === 'text' ? c.text : ''))
124  .join('\n');
125

First 10 of 14 lines, the second copy on the right.

10 lines in 10 placestypescripttests51 tokens

tests/tools/memory.test.ts:99–108tests/tools/memory.test.ts:121–130tests/tools/memory.test.ts:143–152tests/tools/memory.test.ts:371–380tests/tools/memory.test.ts:421–430and 5 more

99    const responseData = await response.handle(context);
100    const output = responseData.content
101      .map(c => (c.type === 'text' ? c.text : ''))
102      .join('\n');
103
104    t.assert.snapshot(output);
105  });
106});
107
108it('with objectsRetainedByContexts filterName', async t => {

121    const responseData = await response.handle(context);
122    const output = responseData.content
123      .map(c => (c.type === 'text' ? c.text : ''))
124      .join('\n');
125
126    t.assert.snapshot(output);
127  });
128});
129
130it('with sharedNativeContext filterName', async t => {

13 lines in 10 placestypescripttests50 tokens
tests/ToolHandler.test.ts:276–288 tests/ToolHandler.test.ts:503–515 tests/ToolHandler.test.ts:579–591 tests/ToolHandler.test.ts:635–647 tests/ToolHandler.test.ts:692–704and 5 more
13 lines in 8 placestypescripttests51 tokens
tests/ToolHandler.test.ts:59–71 tests/ToolHandler.test.ts:274–286 tests/ToolHandler.test.ts:577–589 tests/ToolHandler.test.ts:633–645 tests/ToolHandler.test.ts:690–702and 3 more

By format, code only

Format	Files	Lines	Clones	Duplicated lines	Duplication
typescript	112	20,784	16	180	0.87%
javascript	7	987	0	0	0%
bash	9	644	0	0	0%
perl	1	174	0	0	0%

By format, all files

Format	Files	Lines	Clones	Duplicated lines	Duplication
typescript	182	46,023	370	5,063	11%
markdown	29	4,728	13	83	1.76%
yaml	16	666	8	122	18.32%
json	12	1,919	0	0	0%
javascript	10	1,147	0	0	0%
bash	15	808	0	0	0%
perl	1	174	0	0	0%

Trending appearances

Day	Rank	Stars	Files	Lines	Clones	All files	Code	Health	Commit
Sep 3, 2026	#5	50,722 (+148)	265	55,465	391	9.5%	0.8%	—	`b2007ab`

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