feat(core): export config definition types

[chenjiahan]

Summary

This PR renames the config definition union type from RsbuildConfigExport to RsbuildConfigDefinition so the type better describes both config-file exports and values passed to defineConfig. It also exports RsbuildConfigDefinition, RsbuildConfigSyncFn, and RsbuildConfigAsyncFn from the @rsbuild/core entry point.

[Copilot]

Pull request overview

This PR refactors the core config-loading types by renaming the union type used for config “definitions” and exposing the relevant config definition types from the @rsbuild/core public entry point, improving clarity for both config-file exports and defineConfig(...) inputs.

Changes:

• Rename the config definition union type from RsbuildConfigExport to RsbuildConfigDefinition.
• Update defineConfig overloads and config loader typing to use RsbuildConfigDefinition.
• Re-export RsbuildConfigDefinition, RsbuildConfigSyncFn, and RsbuildConfigAsyncFn from @rsbuild/core.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/core/src/loadConfig.ts	Renames the config definition union type and updates all local usages (defineConfig + loader typing).
packages/core/src/index.ts	Re-exports the config definition-related types from the package entry point.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 79eb7721-a53e-47dd-ac39-37207931d6d3

📥 Commits

Reviewing files that changed from the base of the PR and between 5f7a80d and e0cb928.

📒 Files selected for processing (2)

• packages/core/src/index.ts
• packages/core/src/loadConfig.ts

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📝 Walkthrough

Walkthrough

This change renames the exported type RsbuildConfigExport to RsbuildConfigDefinition in packages/core/src/loadConfig.ts, updating the defineConfig overloads/implementation, the getConfigExport return type, the native loader wrapper's typed field, a local variable declaration, and the jiti.import generic to use the new type name. The package entry file packages/core/src/index.ts additionally re-exports RsbuildConfigAsyncFn, RsbuildConfigDefinition, and RsbuildConfigSyncFn as part of its public API.

Changes

Area	Change
packages/core/src/loadConfig.ts	Renamed RsbuildConfigExport to RsbuildConfigDefinition; updated defineConfig signatures, getConfigExport return type, native loader wrapper field type, local variable type, and jiti.import generic
packages/core/src/index.ts	Added re-exports for RsbuildConfigAsyncFn, RsbuildConfigDefinition, RsbuildConfigSyncFn

Related PRs: None identified.

Suggested labels: type, refactor

Suggested reviewers: None identified.

Poem
A rabbit renamed a type today,
From Export to Definition, hop-hop-hooray,
Through jiti's import and configs unwrapped,
The public API's now neatly re-mapped,
Small diff, big clarity — carrots for all! 🥕

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise and accurately summarizes the main change: exporting config definition types.
Description check	✅ Passed	The description directly matches the refactor and new exports in the changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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