Moonbit Dts Normalization

MoonBit DTS Normalization

Use this skill when changing how MoonBit-generated .d.ts files are rewritten into clearer TypeScript declarations.

Scope

This is intentionally narrow.

• It targets MoonBit-generated .d.ts.
• It mainly rewrites the import type * as MoonBit from "./moonbit.d.ts" alias layer.
• It is a readability pass, not a general-purpose .d.ts pretty-printer.
• Public CLI surface: mbt2ts normalize <ts> [out]. The library entry is pub async fn emit_typescript_decl in src/main.mbt.

Start here

Read these files first:

• src/bridge/typescript_decl.mbt — the normalization rewriter
• src/bridge/typescript_decl_wbtest.mbt — fixture-based tests
• src/main.mbt — the emit_typescript_decl library entry
• src/main_wbtest.mbt — end-to-end "MoonBit-generated d.ts in, normalized d.ts out" tests
• src/cmd/mbt2ts/main.mbt — dispatcher arm for normalize

If the companion plugin repo exists, also read:

• /tmp/vite-plugin-moonbit-worktree/src/index.ts
• /tmp/vite-plugin-moonbit-worktree/test/normalized-dts.test.mjs
• /tmp/vite-plugin-moonbit-worktree/README.md

UX rules

• normalizedDts is experimental. Keep that explicit in docs and logs.
• If the plugin skips normalization, it should say why.
• If the plugin reuses tsBridge.generatorRoot, that should stay visible to the user.
• Document the manual fallback command for workflows that call moon build directly.
• The CLI invocation is moon run src/cmd/mbt2ts -- normalize <ts> — not the old normalize-moonbit-dts verb.

Validation

In this repo:

moon check --deny-warn
moon test --target native
moon test --target native -p mizchi/ts/bridge --filter typescript_decl
moon fmt

In the companion plugin repo when present:

pnpm exec tsc --noEmit
pnpm test