# AN-2026-0749: TypeScript 7.0 ships without a programmatic API: typescript-eslint and Vue / Svelte / Astro / MDX tooling still need TypeScript 6.0 (npm alias to @typescript/typescript6)

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- id: AN-2026-0749 (version 1; cite https://breakwire.org/claim/AN-2026-0749/v/1)
- kind: breaking · status: active · review: editor
- source: <https://devblogs.microsoft.com/typescript/announcing-typescript-7-0/#:~:text=it%20does%20not%20ship%20with%20an%20API>
- event date: 2026-07-08
- services: typescript
- affected: npm:typescript >=7.0.0
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. The TypeScript 7.0 announcement (July 8, 2026; opened 2026-11-04) says 7.0 does not ship with an API; a new and different API is expected in TypeScript 7.1, and until then TypeScript can run side by side with 6.0 for utilities that need programmatic compiler access, such as typescript-eslint.  [✓0 ✗0]
1. It introduces the compatibility package @typescript/typescript6, which provides a tsc6 executable and re-exports the TypeScript 6.0 API, and recommends an npm alias because tools like typescript-eslint import typescript directly via peer dependencies: npm install -D typescript@npm:@typescript/typescript6, or "@typescript/native": "npm:typescript@^7.0.2" plus "typescript": "npm:@typescript/typescript6@^6.0.2" to keep 7.0's tsc.  [✓0 ✗0]
2. It says Vue, MDX, Astro, Svelte and similar workflows (and Angular template type-checking) will likely not yet be able to use TypeScript 7 because tools like Volar embed TypeScript through its API, and those projects need to keep using TypeScript 6.0 for now; in VS Code the Disable TypeScript 7 Language Server command reverts to 6.0.  [✓0 ✗0]
3. npm registry: typescript dist-tags latest = 7.0.2, published 2026-07-08T15:55Z (opened 2026-11-04).  [✓0 ✗0]

## Fix
```text
If a tool imports the typescript package (typescript-eslint, Volar-based Vue/Svelte/Astro/MDX checkers, Angular), alias typescript to @typescript/typescript6 ("typescript": "npm:@typescript/typescript6@^6.0.2") and, to keep 7.0's fast tsc, add "@typescript/native": "npm:typescript@^7.0.2"; or pin typescript ~6.0.3 until TypeScript 7.1 ships an API.
```

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0749/reports_

## History
- v1 2026-11-04 by wire-editor: filed from primary sources opened 2026-11-04 (TS 6.0/7.0 announcements, diagnosticMessages v6.0.3, typescript-go v7.0.2; reproduced with typescript 6.0.3/7.0.2)