{"record":{"id":"e5a6585bc1a87530","repo":"windmill-labs/windmill","slug":"no-changes-in-file-requested-changed-files","errorCode":null,"errorMessage":"No changes in file \"${requested}\". Changed files: ${changed}.","messagePattern":"No changes in file \"(.+?)\"\\. Changed files: (.+?)\\.","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"warning","filePath":"frontend/src/lib/components/copilot/chat/global/core.ts","lineNumber":6692,"sourceCode":"function renderEntryFiles(\n\tfiles: Record<string, DiffFileView>,\n\tconfigPatch: string,\n\targs: { file?: string; offset?: number; limit?: number }\n): string {\n\tif (args.file !== undefined) {\n\t\t// App files are keyed with a leading slash (\"/App.tsx\") — accept the\n\t\t// slash-less spelling and a unique basename too.\n\t\tconst names = Object.keys(files)\n\t\tconst requested = args.file\n\t\tconst resolved =\n\t\t\tnames.find((n) => n === requested) ??\n\t\t\tnames.find((n) => n === `/${requested}`) ??\n\t\t\t(names.filter((n) => n.endsWith(`/${requested.replace(/^\\//, '')}`)).length === 1\n\t\t\t\t? names.find((n) => n.endsWith(`/${requested.replace(/^\\//, '')}`))\n\t\t\t\t: undefined)\n\t\tif (resolved === undefined) {\n\t\t\tconst changed = names.join(', ') || '(none)'\n\t\t\tthrow new Error(`No changes in file \"${requested}\". Changed files: ${changed}.`)\n\t\t}\n\t\tconst fileDiff = files[resolved]\n\t\tif (fileDiff.patch === '') {\n\t\t\t// Empty file added/deleted: the presence change IS the whole diff.\n\t\t\treturn `File \"${resolved}\" was ${fileDiff.status} with empty content.`\n\t\t}\n\t\treturn windowPatchBody(fileDiff.patch, args.offset ?? 0, args.limit ?? DIFF_READ_DEFAULT_LINES)\n\t}\n\tconst sections: string[] = []\n\tconst fileLines = Object.entries(files).map(\n\t\t([name, fileDiff]) =>\n\t\t\t`- ${name} — ${fileDiff.status}${fileDiff.status === 'deleted' ? '' : fileDiff.lineCount === 0 ? ' (empty file)' : ` (${fileDiff.lineCount} diff lines)`}`\n\t)\n\tsections.push(\n\t\tfileLines.length > 0\n\t\t\t? `${fileLines.length} file(s) changed:\\n${fileLines.join('\\n')}\\nRead one with file=\"<name>\".`\n\t\t\t: 'No file contents changed.'\n\t)","sourceCodeStart":6674,"sourceCodeEnd":6710,"githubUrl":"https://github.com/windmill-labs/windmill/blob/e474e8803ce2ff5c2df09a58dab51d45f5c922ca/frontend/src/lib/components/copilot/chat/global/core.ts#L6674-L6710","documentation":"When diffing a multi-file app with a `file` argument, the tool resolves the requested name against the changed-file list: exact `/name` match first, then a unique suffix match. If no changed file resolves, it throws this error listing which files actually changed. Note it reports files with changes — an unchanged file is not in the list.","triggerScenarios":"Calling diff on an app with `file` set to a name that is not among the changed files: misspelled name, wrong relative path, the file exists in the app but was not modified, or the suffix match is ambiguous (two files end with the same suffix) so resolution returns undefined.","commonSituations":"Agents guessing file names without listing the app; asking for 'index.ts' when the change is in 'backend/index.ts' and a sibling 'frontend/index.ts' also changed (ambiguous); requesting a file that exists but has no diff.","solutions":["Read the 'Changed files:' list in the error and retry with one of those exact names","If the file exists but is unchanged, diff without `file` and inspect the full diff","Use the app's file tree to get exact paths before narrowing"],"exampleFix":"// before\ndiff({ type: 'app', path: 'u/admin', file: 'app.ts' })\n// error: Changed files: /scripts/loader.ts\n// after\ndiff({ type: 'app', path: 'u/admin', file: 'scripts/loader.ts' })","handlingStrategy":"validation","validationCode":"const changed = Object.keys(files)\nconst resolved = changed.find((n) => n === `/${requested}`) ??\n  (changed.filter((n) => n.endsWith(`/${requested.replace(/^\\//, '')}`)).length === 1\n    ? changed.find((n) => n.endsWith(`/${requested.replace(/^\\//, '')}`))\n    : undefined)\nif (!resolved) console.warn(`\"${requested}\" not changed; changed files: ${changed.join(', ')}`)","typeGuard":null,"tryCatchPattern":"try {\n  return await diffItem({ type: 'app', path, file: requested })\n} catch (e) {\n  const m = /Changed files: (.*)\\.$/.exec(String(e?.message))\n  if (m) {\n    const [first] = m[1].split(', ')\n    return await diffItem({ type: 'app', path, file: first.replace(/^\\//, '') })\n  }\n  throw e\n}","preventionTips":["Copy file names exactly from the changed-files list","Use unique unambiguous paths when several files share a basename","Diff without `file` first to discover which files changed"],"tags":["arguments","apps","diff"],"backgroundTag":"invalid-tool-arguments","analyzedSha":"e474e8803ce2ff5c2df09a58dab51d45f5c922ca","analyzedAt":"2026-09-03T12:38:19.024Z","contentChangedAt":"2026-09-03T12:38:19.024Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}