[api] Add .getReducedType() method - #63899
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Tom Mrazauskas (mrazauskas)
August 20, 2026 07:26
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Pull request overview
Adds public reduced-type access across the compiler backend and synchronous/asynchronous TypeScript APIs.
Changes:
- Exposes the checker’s existing type-reduction algorithm.
- Adds protocol routing and cached API wrappers.
- Tests reduction through both API modes.
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Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.
Show a summary per file
| File | Description |
|---|---|
tsc/internal/checker/exports.go |
Exposes GetReducedType. |
tsc/internal/api/session.go |
Handles reduced-type requests. |
tsc/internal/api/proto.go |
Registers the protocol method. |
packages/typescript/src/api/proto.generated.ts |
Adds generated protocol typing. |
packages/typescript/src/api/sync/types.ts |
Declares the synchronous type method. |
packages/typescript/src/api/sync/api.ts |
Implements synchronous access and caching. |
packages/typescript/src/api/async/types.ts |
Declares the asynchronous type method. |
packages/typescript/src/api/async/api.ts |
Implements asynchronous access and caching. |
packages/typescript/test/sync/api.test.ts |
Tests synchronous reduction. |
packages/typescript/test/async/api.test.ts |
Tests asynchronous reduction. |
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Tom Mrazauskas (mrazauskas)
changed the title
.getReducedType() method.getReducedType() method
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Fixes #63894
This PR adds the
. getReducedType()method to the checker instance.