Move @typescript/api and @typescript/ast into @typescript/native-preview for publishing

[andrewbranch]

To avoid version compatibility issues between the JS API client and Go API server, we decided not to separate them into different packages. This PR moves the contents of @typescript/api and @typescript/ast into the @typescript/native-preview package, which will eventually become typescript.

I'd like to merge this after the TypeScript 7.0 beta release.

[andrewbranch]

I kept the option only because I feel like it will be useful for us in local development/debugging, but maybe not—I could remove it from the declaration emit types, or remove it altogether, or remove it once we're ready to RC. Thoughts?

[jakebailey]

I don't think it's a big deal to leave in for now

[Copilot]

Pull request overview

This PR consolidates the JavaScript API client (@typescript/api) and AST surface (@typescript/ast) into @typescript/native-preview to avoid version skew between the JS client and the Go server, aligning with the longer-term plan for native-preview to become typescript.

Changes:

• Move generated AST + API client codegen outputs into _packages/native-preview/src/{ast,api} and update generators accordingly.
• Update @typescript/native-preview to be publishable as a JS API package (exports map, build/test scripts, dist output, enums generation).
• Remove the standalone _packages/api and _packages/ast package manifests/tsconfigs and update tests/imports to use @typescript/native-preview/*.

Reviewed changes

Copilot reviewed 32 out of 96 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
package-lock.json	Marks removed workspace packages as extraneous; updates native-preview deps/devDeps metadata.
_scripts/generate-ts-ast.ts	Redirects AST codegen outputs into native-preview/src/ast.
_scripts/generate-encoder.ts	Redirects encoder/protocol codegen outputs into native-preview/src/api/node and updates AST imports to relative paths.
_packages/native-preview/tsconfig.json	Switches native-preview to a composite build that emits dist/ + declarations.
_packages/native-preview/tsconfig.dev.json	Adds dev/test-oriented TS settings (noEmit, nodenext, TS extension imports).
_packages/native-preview/tsconfig.base.json	Introduces shared TS defaults for the package (target/lib/strict/composite, etc.).
_packages/native-preview/test/types.d.ts	Adds local type shim for tinybench compilation.
_packages/native-preview/test/tsconfig.json	Removes reference to the old ../../ast project and references only the package root.
_packages/native-preview/test/sync/astnav.test.ts	Updates imports from @typescript/api/@typescript/ast to @typescript/native-preview/*; relies on default exe path.
_packages/native-preview/test/sync/ast.test.ts	Updates imports to @typescript/native-preview/ast and related subpaths; updates fs/api imports.
_packages/native-preview/test/sync/api.test.ts	Updates imports to @typescript/native-preview/*; removes explicit tsserverPath usage.
_packages/native-preview/test/sync/api.bench.ts	Updates imports and internal paths for moved node API implementation.
_packages/native-preview/test/encoder.test.ts	Updates AST/factory imports and node encoder/protocol import paths.
_packages/native-preview/test/async/astnav.test.ts	Updates async API + AST imports; removes explicit tsserverPath.
_packages/native-preview/test/async/api.test.ts	Updates async API + AST imports; removes explicit tsserverPath.
_packages/native-preview/test/async/api.bench.ts	Updates async benchmark imports and internal node API path.
_packages/native-preview/test/api.bench.ts	Adds a unified entrypoint to run both async and sync benchmarks.
_packages/native-preview/src/enums/typePredicateKind.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/typePredicateKind.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/typeFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/typeFlags.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/tokenFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/tokenFlags.enum.ts	Adds generated typed const-enum declaration in native-preview.
_packages/native-preview/src/enums/syntaxKind.enum.ts	Adds generated SyntaxKind enum into native-preview.
_packages/native-preview/src/enums/symbolFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/symbolFlags.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/signatureKind.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/signatureKind.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/signatureFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/signatureFlags.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/scriptTarget.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/scriptTarget.enum.ts	Adds generated typed const-enum declaration in native-preview.
_packages/native-preview/src/enums/scriptKind.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/scriptKind.enum.ts	Adds generated typed const-enum declaration in native-preview.
_packages/native-preview/src/enums/regularExpressionFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/regularExpressionFlags.enum.ts	Adds generated typed const-enum declaration in native-preview.
_packages/native-preview/src/enums/outerExpressionKinds.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/outerExpressionKinds.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/objectFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/objectFlags.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/nodeFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/nodeFlags.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/modifierFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/modifierFlags.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/languageVariant.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/languageVariant.enum.ts	Adds generated typed const-enum declaration in native-preview.
_packages/native-preview/src/enums/elementFlags.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/elementFlags.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/diagnosticCategory.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/diagnosticCategory.enum.ts	Adds generated typed enum declaration in native-preview.
_packages/native-preview/src/enums/commentDirectiveType.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/commentDirectiveType.enum.ts	Adds generated typed const-enum declaration in native-preview.
_packages/native-preview/src/enums/characterCodes.ts	Adds generated runtime enum mirror in native-preview.
_packages/native-preview/src/enums/characterCodes.enum.ts	Adds generated typed const-enum declaration in native-preview.
_packages/native-preview/src/ast/visitor.ts	Adds handwritten visitor/forEachChild implementations needed by generated AST code.
_packages/native-preview/src/ast/utils.ts	Adds syntax kind formatting + cast helpers into native-preview AST surface.
_packages/native-preview/src/ast/is.ts	Adds handwritten AST type guards and re-exports generated guards.
_packages/native-preview/src/ast/index.ts	Adds the public AST barrel export for @typescript/native-preview/ast.
_packages/native-preview/src/ast/clone.ts	Adds deep-clone utilities (ported) into native-preview AST surface.
_packages/native-preview/src/ast/astnav.ts	Adds token navigation helpers into native-preview AST surface.
_packages/native-preview/src/ast/ast.ts	Adds handwritten core AST types (Node, SourceFile, etc.) and exports generated AST types.
_packages/native-preview/src/api/syncChannel.ts	Adds a pure-JS sync RPC channel implementation replacing the native addon.
_packages/native-preview/src/api/sync/types.ts	Updates sync types header paths and regenerate comment to new layout.
_packages/native-preview/src/api/sync/client.ts	Uses resolveExePath() so tsserverPath becomes optional and defaults to bundled tsgo.
_packages/native-preview/src/api/sync/api.ts	Updates AST imports to use the in-package AST entrypoint.
_packages/native-preview/src/api/sourceFileCache.ts	Updates AST imports to in-package relative path.
_packages/native-preview/src/api/proto.ts	Adds API protocol types and helper utilities (DocumentIdentifier, snapshot change types, etc.).
_packages/native-preview/src/api/path.ts	Adds path/URI helpers used by the API protocol surface.
_packages/native-preview/src/api/options.ts	Makes tsserverPath optional + adds resolveExePath() and updates spawn/socket discrimination.
_packages/native-preview/src/api/objectRegistry.ts	Adds per-snapshot identity registry for symbol/type/signature objects.
_packages/native-preview/src/api/node/protocol.ts	Adds protocol constants and re-exports generated child-properties in new location.
_packages/native-preview/src/api/node/protocol.generated.ts	Updates generated protocol TS import to relative in-package AST path.
_packages/native-preview/src/api/node/node.ts	Updates AST imports to in-package AST barrel.
_packages/native-preview/src/api/node/node.infrastructure.ts	Updates AST imports to in-package AST barrel.
_packages/native-preview/src/api/node/node.generated.ts	Updates AST imports to in-package AST barrel.
_packages/native-preview/src/api/node/msgpack.ts	Adds a minimal msgpack codec used by node/encoder + sync channel.
_packages/native-preview/src/api/node/encoder.ts	Updates AST imports to in-package AST barrel.
_packages/native-preview/src/api/node/encoder.generated.ts	Updates AST imports to in-package AST barrel.
_packages/native-preview/src/api/fs.ts	Adds in-package virtual FS + callback list used by the client.
_packages/native-preview/src/api/async/types.ts	Adds async type surface (Types, Diagnostics, etc.) into new layout.
_packages/native-preview/src/api/async/client.ts	Uses resolveExePath() for default bundled tsgo behavior.
_packages/native-preview/src/api/async/api.ts	Updates AST imports to use the in-package AST entrypoint.
_packages/native-preview/scripts/generateSync.ts	Updates sync-wrapper generation to read from src/api and updates regenerate comment.
_packages/native-preview/package.json	Makes native-preview publish the JS API + AST (exports map, build/test scripts, dependencies).
_packages/native-preview/lib/getExePath.d.ts	Adds type declarations for getExePath.
_packages/ast/tsconfig.json	Removes standalone @typescript/ast build config.
_packages/ast/package.json	Removes standalone @typescript/ast package manifest.
_packages/api/tsconfig.json	Removes standalone @typescript/api build config.
_packages/api/package.json	Removes standalone @typescript/api package manifest.
Herebyfile.mjs	Redirects enum generation to native-preview, updates build/test tasks, and packages dist/ into the publish output.

[jakebailey]

Can we exclude the vendored code from formatting so it's just a pure copy?

I'm also wondering if we should bundle their code with esbuild or something instead of shipping it as-is, but it's "only" 10% of the package size, so probably not really a problem

[jakebailey]

So long, subpackages