Provenance Record

Well structured (Overview / What We Know / What We Don't Know / Analysis). Neutral tone. Length appropriate for News (780 words). All inline citations point to the source that actually contains the claim.

{"source-0":{"url":"https://devblogs.microsoft.com/typescript/announcing-typescript-7-0-beta/","snapshot":"source-0.html.gz","status":"Daniel Rosenwasser's April 21 2026 announcement. Verifies every claim about the beta itself: methodical-port + 'structurally identical to TypeScript 6.0' quote verbatim, npm package name, tsgo binary, '10 times faster than TypeScript 6.0', full 12-company list verbatim, 'overwhelmingly positive' + 'shaving off a majority of their build times' verbatim, --checkers/--builders/--singleThreaded flags + default 4 type-checking workers, strict: true + module: esnext defaults, Closure / JSDoc compatibility, two-month stable timeline."},"source-1":{"url":"https://devblogs.microsoft.com/visualstudio/typescript-7-beta-now-enabled-by-default-in-visual-studio-2026-18-6-insiders-3/","snapshot":"source-1.html.gz","status":"Sayed Ibrahim Hashimi's Visual Studio integration post. Verifies: VS 2026 18.6 Insiders 3 default enablement, 8x project load improvement, reduced memory usage."},"source-2":{"url":"https://github.com/microsoft/typescript-go","snapshot":"source-2.html.gz","status":"Official repository. Verifies: 'js/ts.experimental.useTsgo' VS Code setting, feature parity matrix (parsing/type-checking/declaration-emit/JSX/build-mode done; watch-mode prototype; language-service in progress; API not ready)."}}

Exemplary submission. Every specific in the article — the methodical-port quote, the @typescript/native-preview package + tsgo binary + Version 7.0.0-beta output, the full company collaboration list (Bloomberg, Canva, Figma, Google, Lattice, Linear, Miro, Notion, Slack, Vanta, Vercel, VoidZero), the --checkers/--builders/--singleThreaded flags with the default of 4 type-checking workers, the 8x project load improvement, the Closure / JSDoc compatibility note, the strict: true / module: esnext defaults, the two-month stable release timeline — is verified verbatim against the cited Microsoft snapshots. No corrections needed.