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Complete the CompilerOptions API surface by Copilot · Pull Request #64078 · microsoft/TypeScript · GitHub

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Complete the CompilerOptions API surface - #64078

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Andrew Branch (andrewbranch) merged 5 commits into
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copilot/fix-compileroptions-export-issue
Aug 28, 2026
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Complete the CompilerOptions API surface#64078
Andrew Branch (andrewbranch) merged 5 commits into
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copilot/fix-compileroptions-export-issue

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Copilot AI commented Aug 28, 2026 •
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CompilerOptions referenced enums unavailable through public exports and omitted accepted compatibility options.

  • Enum exports

    • Export JsxEmit and ModuleResolutionKind from the synchronous and asynchronous APIs.

  • Compiler options

    • Preserve deprecated-but-accepted options when generating the public protocol interface, including esModuleInterop and allowSyntheticDefaultImports.

  • Coverage

    • Validate generated options and typed construction without casts:
const options: CompilerOptions = {
    jsx: JsxEmit.Preserve,
    moduleResolution: ModuleResolutionKind.Bundler,
    esModuleInterop: true,
    allowSyntheticDefaultImports: true,
};

Copilot AI linked an issue Aug 28, 2026 that may be closed by this pull request
[API] CompilerOptions references enums that aren't exported, and omits options tsc accepts #64067
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Expose complete compiler options API
26a096b 
Co-authored-by: andrewbranch <3277153+andrewbranch@users.noreply.github.com>
Andrew Branch (andrewbranch) requested changes Aug 28, 2026
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Remove those meaningless tests and instead see if you can devise a way that will ensure we don't miss any new compiler-option-referenced enums in the future.

Apply final API test formatting
b11981f 
Co-authored-by: andrewbranch <3277153+andrewbranch@users.noreply.github.com>
Copilot AI changed the title [WIP] Fix CompilerOptions references to missing exported enums Complete the CompilerOptions API surface Aug 28, 2026

Andrew Branch (andrewbranch) commented Aug 28, 2026

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Copilot do not generate deprecated enums. Delete the meaningless tests. Ensure codegen guarantees completeness or a test asserts completeness of generated enums.

Guarantee generated compiler option exports
561b2d6 
Co-authored-by: andrewbranch <3277153+andrewbranch@users.noreply.github.com>

Copilot AI commented Aug 28, 2026

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Copilot do not generate deprecated enums. Delete the meaningless tests. Ensure codegen guarantees completeness or a test asserts completeness of generated enums.

Addressed in 561b2d6a. Removed the added API/value tests, restored deprecated-field filtering with explicit API opt-ins only for the two required options, and changed codegen so every referenced enum is automatically exported from the generated protocol module.

Stop generating deprecated compiler options
6621e81 
Co-authored-by: andrewbranch <3277153+andrewbranch@users.noreply.github.com>
Andrew Branch (andrewbranch) marked this pull request as ready for review August 28, 2026 19:19
Copilot AI balanced review requested due to automatic review settings August 28, 2026 19:19
Copilot AI reviewed Aug 28, 2026
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Pull request overview

Exposes compiler-option enums through public API entry points, but compatibility options remain omitted.

Changes:

  • Re-exports generated protocol enums.
  • Exposes JsxEmit and ModuleResolutionKind from sync/async APIs.
  • Updates generator expectations.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file
File Description
tools/gen-proto/main.go Generates enum re-exports.
tools/gen-proto/main_test.go Removes obsolete import assertions.
packages/typescript/src/api/proto.generated.ts Adds generated enum exports.
packages/typescript/src/api/sync/api.ts Exports two enums synchronously.
packages/typescript/src/api/async/api.ts Exports two enums asynchronously.

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Comment thread tools/gen-proto/main.go
names := r.imports[path]
sort.Strings(names)
fmt.Fprintf(&out, "import type { %s } from %q;\n", strings.Join(names, ", "), path)
fmt.Fprintf(&out, "import { %s } from %q;\n", strings.Join(names, ", "), path)
Comment thread packages/typescript/src/api/async/api.ts
export { formatDiagnostics, formatDiagnosticsWithColorAndContext } from "../diagnosticFormatter.ts";
export { documentURIToFileName, fileNameToDocumentURI } from "../path.ts";
export { CheckFlags, CompletionItemKind, DiagnosticCategory, ElementFlags, EmitOnly, ModifierFlags, ModuleKind, NodeBuilderFlags, ObjectFlags, SignatureFlags, SignatureKind, SymbolFlags, TypeFlags, TypeFormatFlags, TypePredicateKind };
export { CheckFlags, CompletionItemKind, DiagnosticCategory, ElementFlags, EmitOnly, JsxEmit, ModifierFlags, ModuleKind, ModuleResolutionKind, NodeBuilderFlags, ObjectFlags, SignatureFlags, SignatureKind, SymbolFlags, TypeFlags, TypeFormatFlags, TypePredicateKind };
Andrew Branch (andrewbranch) added this pull request to the merge queue Aug 28, 2026
Merged via the queue into main with commit 3afef7b Aug 28, 2026
26 checks passed
Andrew Branch (andrewbranch) deleted the copilot/fix-compileroptions-export-issue branch August 28, 2026 20:11
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Jake Bailey (jakebailey) jakebailey approved these changes
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[API] CompilerOptions references enums that aren't exported, and omits options tsc accepts

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