a

\")).toBe(false);","\t\ttrue,","\texpect(prefersMarkdown([\"text/plain\", \"text/html\"], \"

## a

\")).toBe(","\texpect(prefersMarkdown([\"text/plain\"], \"\")).toBe(true);","test(\"reads plain text and structureless HTML as Markdown, but not rich HTML\", () => {","\t) expect(looksLikeMarkdown(text), text).toBe(false);","\t\t\t\"snake __init__ name\",","\t\t\t\"1986. A great year.\\n1987. Another one.\",","\t\t\t\"Two\\n\\nparagraphs of prose\",","\t\t\t\"```\\nunclosed fence\",","\t\t\t\"It costs $5 and $10\",","\t\t\t\"snake_case_name and __init\",","\t\t\t\"- a lone dash line\",","\t\t\t\"a ** b ** c\",","\t\t\t\"5 * 3 * 2 = 30\",","\t\t\t\"#1 priority is shipping\",","\t\t\t\"Just a sentence.\",","test(\"leaves ordinary prose alone\", () => {","\t) expect(looksLikeMarkdown(text), text).toBe(true);","\t\t\t\"Not ~~this~~\",","\t\t\t\"Run `bun test`\",","\t\t\t\"A [link](https://example.com)\",","\t\t\t\"Some **bold** text\",","\t\t\t\"| a | b |\\n| - | - |\\n| 1 | 2 |\",","\t\t\t\"```ts\\nlet a = 1;\\n```\",","\t\t\t\"> quoted\",","\t\t\t\"- [ ] task\",","\t\t\t\"1. one\\n2. two\",","\t\t\t\"- one\\n- two\",","\t\t\t\"## Heading\",","test(\"recognises clear block and inline syntax\", () => {","\treturn { handled, source };","\tlet source = editor.getEditorState().read(() => $exportPlan({ registry: REGISTRY }));","\t}, { discrete: true });","\t\tif ($isRangeSelection(selection)) handled = $pasteMarkdown(selection, text);","\t\tlet selection = $getSelection();","\t\tblock.selectEnd();","\t\t$getRoot().append(block);","\t\tlet block = build();","\teditor.update(() => {","\tlet handled = false;","\t});","\t\t},","\t\t\tthrow error;","\t\tonError(error) {","\t\tnodes: REGISTRY.nodes,","\tlet editor = createHeadlessEditor({","function paste(text: string, build: () => LexicalNode = () => $createParagraphNode()) {","const REGISTRY = registry();","import type { LexicalNode } from \"lexical\";","} from \"./markdown-paste\";","\tprefersMarkdown,","\tpastedMarkdown,","\tlooksLikeMarkdown,","\tisPlainPasteKey,","\t$pasteMarkdown,","import { limits } from \"@chopin/dialect\";","import { $createCodeBlockNode, $exportPlan, registry } from \"@chopin/dialect\";","\t$createTextNode,","\t$createParagraphNode,","import { createHeadlessEditor } from \"@lexical/headless\";","import { expect, test } from \"bun:test\";","32084f3f","packages/dialect/src/parse.ts",{"_105":1293,"_107":108},{"_105":1292,"_107":108},22,8,[1159,1160,1161],{"_62":1222,"_64":1223,"_66":1222,"_68":1224,"_70":1225},{"_62":1191,"_64":1192,"_66":1193,"_68":1192,"_70":1194},{"_62":1162,"_64":1163,"_66":1164,"_68":1163,"_70":1165},66,11,80,[1166,1167,1168,1169,1170,1171,1172,1173,1174,1175,1176,1177,1178,1179],{"_79":80,"_81":512},{"_79":80,"_81":1190},{"_79":80,"_81":510},{"_79":56,"_81":1189},{"_79":54,"_81":1188},{"_79":80,"_81":547},{"_79":80,"_81":1187},{"_79":56,"_81":1186},{"_79":56,"_81":1185},{"_79":54,"_81":1184},{"_79":54,"_81":1183},{"_79":80,"_81":1182},{"_79":80,"_81":1181},{"_79":80,"_81":1180},"\t\tlet reason = err instanceof Error ? err.message : String(err);","\t} catch (err) {","\t\t});","\t\t\tmdastExtensions: mdast(options),","\t\t\textensions: syntax(options),","\t\t\tmdastExtensions: mdast(),","\t\t\textensions: syntax(),","\t\treturn fromMarkdown(source, {","export function parse(source: string, options: ParseOptions = {}): Root {","export function parse(source: string): Root {"," * @throws {PlanParseError} when the source cannot be parsed.",50,14,64,[1195,1196,1197,1198,1199,1200,1201,1202,1203,1204,1205,1206,1207,1208,1209,1210],{"_79":80,"_81":1211},{"_79":80,"_81":467},{"_79":80,"_81":104},{"_79":56,"_81":1221},{"_79":54,"_81":1220},{"_79":80,"_81":1219},{"_79":80,"_81":1218},{"_79":80,"_81":1217},{"_79":80,"_81":1216},{"_79":80,"_81":1215},{"_79":80,"_81":1214},{"_79":56,"_81":1213},{"_79":54,"_81":1212},{"_79":80,"_81":1211},{"_79":80,"_81":467},{"_79":80,"_81":104},"\t];","\t\t...(jsx ? [mdxJsxFromMarkdown()] : []),","\t\tmdxJsxFromMarkdown(),","\t\tmathFromMarkdown(),","\t\tgfmFootnoteFromMarkdown(),","\t\tgfmTaskListItemFromMarkdown(),","\t\tgfmStrikethroughFromMarkdown(),","\t\tgfmTableFromMarkdown(),","\treturn [","function mdast({ jsx = true }: ParseOptions) {","function mdast() {",29,20,34,[1226,1227,1228,1229,1230,1231,1232,1233,1234,1235,1236,1237,1238,1239,1240,1241,1242,1243,1244,1245,1246,1247,1248,1249,1250,1251,1252,1253,1254,1255,1256,1257,1258,1259,1260,1261,1262],{"_79":80,"_81":1291},{"_79":80,"_81":467},{"_79":80,"_81":104},{"_79":54,"_81":1290},{"_79":54,"_81":1285},{"_79":54,"_81":1289},{"_79":54,"_81":1288},{"_79":54,"_81":1287},{"_79":54,"_81":1282},{"_79":54,"_81":1286},{"_79":54,"_81":1285},{"_79":54,"_81":1284},{"_79":54,"_81":1283},{"_79":54,"_81":1282},{"_79":54,"_81":1281},{"_79":54,"_81":1280},{"_79":54,"_81":104},{"_79":80,"_81":514},{"_79":80,"_81":1279},{"_79":80,"_81":1278},{"_79":80,"_81":510},{"_79":56,"_81":1277},{"_79":54,"_81":1276},{"_79":80,"_81":1219},{"_79":80,"_81":1275},{"_79":80,"_81":1274},{"_79":80,"_81":1273},{"_79":80,"_81":1272},{"_79":56,"_81":1271},{"_79":54,"_81":1270},{"_79":80,"_81":1269},{"_79":80,"_81":1268},{"_79":56,"_81":1267},{"_79":54,"_81":1266},{"_79":80,"_81":1265},{"_79":80,"_81":1264},{"_79":80,"_81":1263},"\t\t// `html` node, and indenting a nested component would turn it into code.","\t\t// HTML constructs shadow JSX, so `` would parse as an opaque","\t\t// Turns off raw HTML, autolinks and indented code. Without it micromark's","\t\t...(jsx ? [mdxJsx()] : []),","\t\tmdxJsx(),","\t\t// validator rejects any attribute that is not a plain string.","\t\t// No `acorn`: attribute expressions cannot be parsed into JS, and the","\t\tmath({ singleDollarTextMath: singleDollarMath }),","\t\tmath(),","\t\tgfmFootnote(),","\t\tgfmTaskListItem(),","\t\tgfmStrikethrough({ singleTilde: false }),","\t\tgfmTable(),","function syntax({ jsx = true, singleDollarMath = true }: ParseOptions) {","function syntax() {"," * expressions) and any raw-HTML extension."," * Syntax extensions. Notably absent: `mdxjs`/`mdxExpression` (ESM and JS","};","\tsingleDollarMath?: boolean;","\t */","\t * than formulas, so paste keeps only `$$…$$`. Defaults to true.","\t * Treat `$…$` as inline math. Pasted prose mentions prices far more often","\t/**","\tjsx?: boolean;","\t * protected projection. Defaults to true.","\t * text, which is what pasted Markdown needs: it must never be able to mint a","\t * Parse components. Off, `` and every other tag stay literal","export type ParseOptions = {","\toverride readonly name = \"PlanParseError\";","89c73fb9","3a3b0e91","packages/dialect/src/index.ts",{"_105":1316,"_107":108},{"_105":1315,"_107":108},[1298],{"_62":1299,"_64":65,"_66":1299,"_68":69,"_70":1300},24,[1301,1302,1303,1304,1305,1306,1307],{"_79":80,"_81":1314},{"_79":80,"_81":1313},{"_79":80,"_81":1312},{"_79":54,"_81":1311},{"_79":80,"_81":1310},{"_79":80,"_81":1309},{"_79":80,"_81":1308},"export type { Issue, Options as ValidateOptions, Result as ValidateResult } from \"./validate\";","export { assert, assertIntroducedUrls, PlanValidationError, validate } from \"./validate\";","export { serialize } from \"./serialize\";","export type { ParseOptions } from \"./parse\";","export { parse, PlanParseError } from \"./parse\";","export type { MdxChunk } from \"./chunk\";","export { topLevelChunks } from \"./chunk\";","4e3f8da0","be9fe8bb","e2e/markdown-paste.e2e.ts",{"_105":1442,"_107":108},71,[1321],{"_62":57,"_64":57,"_66":115,"_68":1319,"_70":1322},[1323,1324,1325,1326,1327,1328,1329,1330,1331,1332,1333,1334,1335,1336,1337,1338,1339,1340,1341,1342,1343,1344,1345,1346,1347,1348,1349,1350,1351,1352,1353,1354,1355,1356,1357,1358,1359,1360,1361,1362,1363,1364,1365,1366,1367,1368,1369,1370,1371,1372,1373,1374,1375,1376,1377,1378,1379,1380,1381,1382,1383,1384,1385,1386,1387,1388,1389,1390,1391,1392,1393],{"_79":54,"_81":514},{"_79":54,"_81":1441},{"_79":54,"_81":512},{"_79":54,"_81":1440},{"_79":54,"_81":1439},{"_79":54,"_81":1438},{"_79":54,"_81":510},{"_79":54,"_81":104},{"_79":54,"_81":1437},{"_79":54,"_81":104},{"_79":54,"_81":1436},{"_79":54,"_81":104},{"_79":54,"_81":1435},{"_79":54,"_81":1434},{"_79":54,"_81":1431},{"_79":54,"_81":1433},{"_79":54,"_81":1432},{"_79":54,"_81":1431},{"_79":54,"_81":1430},{"_79":54,"_81":1429},{"_79":54,"_81":1428},{"_79":54,"_81":1427},{"_79":54,"_81":104},{"_79":54,"_81":1426},{"_79":54,"_81":1425},{"_79":54,"_81":1424},{"_79":54,"_81":506},{"_79":54,"_81":1423},{"_79":54,"_81":1422},{"_79":54,"_81":1421},{"_79":54,"_81":1420},{"_79":54,"_81":1419},{"_79":54,"_81":467},{"_79":54,"_81":104},{"_79":54,"_81":1418},{"_79":54,"_81":1405},{"_79":54,"_81":104},{"_79":54,"_81":1404},{"_79":54,"_81":1417},{"_79":54,"_81":104},{"_79":54,"_81":1416},{"_79":54,"_81":1415},{"_79":54,"_81":1414},{"_79":54,"_81":1413},{"_79":54,"_81":1412},{"_79":54,"_81":1411},{"_79":54,"_81":472},{"_79":54,"_81":1410},{"_79":54,"_81":1409},{"_79":54,"_81":1408},{"_79":54,"_81":1407},{"_79":54,"_81":981},{"_79":54,"_81":104},{"_79":54,"_81":1406},{"_79":54,"_81":1405},{"_79":54,"_81":104},{"_79":54,"_81":1404},{"_79":54,"_81":1403},{"_79":54,"_81":1402},{"_79":54,"_81":104},{"_79":54,"_81":1399},{"_79":54,"_81":1401},{"_79":54,"_81":1400},{"_79":54,"_81":104},{"_79":54,"_81":1399},{"_79":54,"_81":1398},{"_79":54,"_81":1397},{"_79":54,"_81":1396},{"_79":54,"_81":1395},{"_79":54,"_81":1394},{"_79":54,"_81":981},"\tawait written(page, room, /Questionnaire id=\"x\"/);","\tawait written(page, room, /Not a heading/);","\tawait expect(content(page)).toContainText('Card ');","\tawait expect(content(page).getByRole(\"heading\")).toHaveCount(0);","\tawait paste(page, '**Card** ');","\tawait page.keyboard.press(\"Enter\");","\tawait expect(content(page)).toContainText(\"## Not a heading\");","\tawait paste(page, \"## Not a heading\", { plain: true });","\tawait expect(content(page)).toContainText(\"#1 priority is 5 * 3\");","\tawait paste(page, \"#1 priority is 5 * 3\");","\tawait content(page).click();","\tlet page = await join(\"ana\");","test(\"ordinary prose, components and ⇧⌘V paste literally\", async ({ join, room }) => {","\tawait written(page, room, /^```ts\\nlet a = 1;\\n```$/m);","\tawait written(page, room, /^- first \\*\\*bold\\*\\* item$/m);","\tawait written(page, room, /^## Pasted heading$/m);","\tawait expect(content(page)).not.toContainText(\"##\");","\t\t\"https://example.com\",","\t\t\"href\",","\tawait expect(content(page).getByRole(\"link\", { name: \"link\" })).toHaveAttribute(","\tawait expect(content(page).locator(\"strong, b\").getByText(\"bold\")).toBeVisible();","\tawait expect(content(page).getByRole(\"listitem\")).toHaveCount(2);","\tawait expect(content(page).getByRole(\"heading\", { level: 2 })).toHaveText(\"Pasted heading\");","\tawait paste(page, MARKDOWN);","test(\"pasted Markdown arrives as the blocks it describes\", async ({ join, room }) => {","\t}, text);","\t\troot.dispatchEvent(new ClipboardEvent(\"paste\", { clipboardData: data, bubbles: true }));","\t\tdata.setData(\"text/plain\", text);","\t\tlet data = new DataTransfer();","\tawait content(page).evaluate((root, text) => {","\t\tawait content(page).dispatchEvent(\"keydown\", { key: \"V\", shiftKey: true, metaKey: true });","\tif (options.plain) {","async function paste(page: Page, text: string, options: { plain?: boolean } = {}) {","].join(\"\\n\");","\t\"```\",","\t\"let a = 1;\",","\t\"```ts\",","\t\"\",","\t\"- second [link](https://example.com)\",","\t\"- first **bold** item\",","\t\"## Pasted heading\",","const MARKDOWN = [","import type { Page } from \"@playwright/test\";","import { content, expect, test, written } from \"./room\";"," * Lexical's literal one, that ⇧⌘V still opts out, and that the result syncs."," * Only a browser can show that a real paste event reaches that path ahead of"," * `markdown-paste.test.ts` covers what counts as Markdown and what it becomes."," * Plain-text Markdown, pasted.","c16c9909","id","01M4CB3P6RGKPS2CTT7BW82VT5","project","number",360,"title","Convert pasted plain-text Markdown into document blocks","description",{"_1482":1483,"_53":1484},"state","merged","base",{"_1445":18,"_1478":1481,"_1480":36},"head",{"_1445":18,"_1478":1479,"_1480":38},"mergeRevision","7f95d854c9cca03081fbf19dd608fda078060c83","implements",[],"addresses",[],"createdBy",{"_1474":1475},"createdAt","2026-10-07T23:27:51.000Z","updatedAt","2026-10-08T14:57:02.000Z","locked","fork","headAvailable",true,"actor",{"_52":1476,"_1443":1477},"user","import:github:5599295","branch","refs/pull/360/head","revision","refs/heads/main","format","markdown","## Why\nPlain-text Markdown pasted from a terminal or writing tool stayed as literal markers such as `##`, `**`, and fences. Structured HTML paste already converted.\n\n## What changed\n- Detect clear Markdown in ordinary plain-text paste, parse it through the restricted dialect, and insert validated document blocks at the selection.\n- Keep protected components, raw HTML, imports, expressions, and ambiguous prose literal. Rejected content falls back to ordinary paste.\n- Preserve literal paste inside code, math, inline code, and table cells, as well as the explicit paste-as-plain-text shortcut. Structured HTML still takes precedence.\n\n## Verification\n17 focused paste tests, `bun run types`, `bun run ci`, and `bun run build` pass on the restacked branch. GitHub's browser suite will run the Markdown paste scenarios on the final published head.\n\n## Visuals\n![Plain-text Markdown before](https://github.com/user-attachments/assets/c74db2bd-aa87-4e9e-a682-40a4e1f0640b)\n\n![Converted Markdown after](https://github.com/user-attachments/assets/f09b72cc-8d19-4ef8-acd5-b043a0a25f03)\n","MaggieAppleton","documentNavigation","repo","githubnext/chopin","repoId","ownerId","org:89615882","site","nexthub","private","admin","settings","triage","starred","stars","watchers","watching","pinned","notify","views",[1623,1624,1625,1626,1627,1628,1629,1630,1631,1632,1633,1634,1635],"navigation",{"_1504":1505,"_1584":1585,"_1586":1587,"_1588":1589,"_1590":1591,"_1592":1593,"_79":1594},"sources",[],"meta",{"_1450":1579,"_1580":1581,"_1582":104,"_1494":22,"_1456":1574,"_1583":22,"_1499":57,"_1500":57},"branches",[1522,1523,1524,1525,1526,1527,1528,1529,1530,1531,1532,1533,1534,1535,1536,1537,1538,1539,1540,1541,1542,1543,1544,1545,30,1546,1547,1548,1549,1550,1551,1552,1553,1554,1555,1556,1557,1558,1559,1560,1561,1562,1563,1564,1565,1566,1567,1568,1569,1570,1571,1572,1573,1574,1575,1576,1577,1578],"tags",[1518,1519,1520,1521],"cloneUrl","https://git.nexthub.sh/githubnext/chopin.git","color-controls-slice-1","color-controls-slice-2","color-controls-slice-3","color-controls-slice-4","Krzysztof-Cieslak-patch-1","Krzysztof-Cieslak-patch-2","Maggie/app-preview-toolkit","Maggie/ci-playwright-install-timeout","Maggie/collaborative-visual-decision","Maggie/design-audit","Maggie/generic-visual-decision-runtime","Maggie/impeccable-chopin-metadata","Maggie/jev-chat-product","Maggie/jev-composed-assessment","Maggie/native-document-layouts","Maggie/openui-composition-product","Maggie/openui-composition-trial","Maggie/planner-visual-authoring","Maggie/planner-visual-requests","Maggie/visual-selection-eval","artifacts/pr-419-live-preview-20261009","automation/pr-maintenance-state","automation/use-effect/callout-disabled-picker-8cf9e49ba5c09471","automation/use-effect/collaboration-options-ref-4e3a5a08a879a5ae","automation/use-effect/room-workspace-effective-access-a57d40866c71bed0","chore/bun-1.4.2","color-controls","color-controls-plan","design-pr-assets","design/archived-decisions-badge","design/channel-route-remount","design/chat-decision-entry","design/conversation-analysis-markers","design/decision-evidence","design/settled-line-icon","dev/integration","diagram-step-controls","feat/liveapp-frontend-pilot","feat/local-experiments","feat/local-launcher-tracer","fix/autolink-mdx-crash","github-pills/2-pills","github-pills/3-hover-card","maggie/app-preview-toolkit","maggie/ci-playwright-install-timeout","maggie/collaborative-visual-decision","maggie/design-audit","maggie/generic-visual-decision-runtime","maggie/impeccable-chopin-metadata","maggie/jev-composed-assessment","maggie/native-document-layouts","maggie/openui-composition-product","maggie/openui-composition-trial","maggie/planner-visual-authoring","maggie/planner-visual-requests","maggie/visual-selection-eval","main","plain-text-fence-chrome","tokens/09-copy","wireframes/2-renderer","wireframes/3-planner","Let's 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