Prepare codebase for TypeScript Native preview compatibility

[Copilot]

TypeScript Native (v7.0.0-dev) is a Go-based port of the TypeScript compiler that removes the baseUrl compiler option. This PR makes the codebase compatible with both TypeScript 5.9.3 and TypeScript Native.

Changes

• Added TypeScript Native preview as optional dependency (@typescript/native-preview@7.0.0-dev.20260105.1)
• Updated packages/openapi-ts/tsconfig.base.json to remove baseUrl and use explicit path mappings:

  {
    "compilerOptions": {
  -   "baseUrl": "./",
      "paths": {
  +     "*": ["./*"],
  -     "~/*": ["src/*"]
  +     "~/*": ["./src/*"]
      }
    }
  }

Migration Status

TypeScript Native is currently in preview with declaration emit and non-esnext target support still in progress. The codebase is prepared for migration but continues using TypeScript 5.9.3 as primary compiler.

Both compilers can now be used:

npx tsc --noEmit    # TypeScript 5.9.3
npx tsgo --noEmit   # TypeScript Native 7.0.0-dev

See docs/typescript-native-migration.md for detailed analysis and migration timeline.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• devblogs.microsoft.com
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node /home/REDACTED/work/_temp/ghcca-node/node/bin/node --enable-source-maps /home/REDACTED/work/_temp/copilot-developer-action-main/dist/index.js (dns block)
  • Triggering command: /usr/bin/curl curl -s REDACTED (dns block)
• https://api.github.com/repos/microsoft/typescript-go/issues
  • Triggering command: /usr/bin/curl curl -s REDACTED (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Migrate to TypeScript Native preview</issue_title>
<issue_description>https://devblogs.microsoft.com/typescript/progress-on-typescript-7-december-2025/</issue_description>

<agent_instructions>Read through the attached blog posts for instructions how to install TypeScript Native preview, configure tsconfig.json file, and things to watch out for. Verify if we're able to fully migrate today or if there are any remaining blockers preventing us from switching.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Migrate to TypeScript Native preview #3182

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[bolt-new-by-stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[changeset-bot]

⚠️ No Changeset found

Latest commit: ebe27c9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
hey-api-docs	Ready	Preview, Comment	Jan 5, 2026 9:54pm