feat: CDDL-to-Zod generator, verified against wire-mesh's conformance vectors

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+concurrency:
+  group: ci-${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-and-test:
+    name: Build, Typecheck, Lint, Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: pnpm/action-setup@v6
+        with:
+          package_json_file: package.json
+
+      - uses: actions/setup-node@v7
+        with:
+          node-version-file: .tool-versions
+          cache: pnpm
+
+      - name: Install
+        run: pnpm install --frozen-lockfile
+
+      - name: Compile the vendored parser
+        run: pnpm run vendor:build
+
+      - name: Build the library (dual ESM/CJS, verified with attw)
+        run: pnpm run build
+
+      - name: Typecheck
+        run: pnpm run typecheck
+
+      - name: Lint
+        run: pnpm run lint
+
+      - name: Round-trip wire-mesh's conformance vectors through the generated schemas
+        run: pnpm run test

.gitignore

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+node_modules/
+dist/
+.turbo/
+.eslintcache
+coverage/
+test/fixtures/generated/protocol.ts

.tool-versions

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+nodejs 26

eslint.config.ts

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+import { exadevConfig } from "@exadev/eslint-config";
+import eslintPluginPrettierRecommended from "eslint-plugin-prettier/recommended";
+import globals from "globals";
+
+export default exadevConfig(
+  {},
+  {
+    ignores: [
+      "dist",
+      "coverage",
+      "node_modules",
+      ".turbo",
+      "vendor",
+      "test/fixtures/generated",
+    ],
+  },
+  {
+    languageOptions: {
+      parserOptions: {
+        project: ["./tsconfig.json", "./tsconfig.node.json"],
+        tsconfigRootDir: import.meta.dirname,
+      },
+      globals: { ...globals.node },
+    },
+  },
+  {
+    rules: {
+      "@typescript-eslint/consistent-type-imports": [
+        "error",
+        { fixStyle: "inline-type-imports" },
+      ],
+    },
+  },
+  eslintPluginPrettierRecommended,
+);

package.json

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+{
+  "name": "cddl.js",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "packageManager": "pnpm@10.33.0",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "turbo run _build",
+    "_build": "tsdown",
+    "vendor:build": "turbo run _vendor:build",
+    "_vendor:build": "tsc -p vendor/cddl/tsconfig.json",
+    "test": "turbo run _test",
+    "_test": "vitest run",
+    "typecheck": "turbo run _typecheck",
+    "_typecheck": "tsc -p tsconfig.json --noEmit && tsc -p tsconfig.node.json --noEmit && tsc -p vendor/cddl/tsconfig.json --noEmit",
+    "lint": "turbo run _lint",
+    "_lint": "eslint . --fix --cache --max-warnings 0"
+  },
+  "dependencies": {
+    "camelcase": "9.0.0",
+    "cbor2": "2.3.0",
+    "zod": "4.5.4"
+  },
+  "devDependencies": {
+    "@arethetypeswrong/cli": "0.18.5",
+    "@exadev/eslint-config": "2.10.6",
+    "@types/node": "26.4.1",
+    "eslint": "10.10.0",
+    "eslint-config-prettier": "10.1.8",
+    "eslint-plugin-prettier": "5.5.6",
+    "globals": "17.12.0",
+    "jiti": "2.7.0",
+    "prettier": "3.9.6",
+    "tsdown": "0.23.0",
+    "turbo": "2.10.12",
+    "typescript": "6.0.3",
+    "vitest": "5.0.0"
+  },
+  "exports": {
+    "./emitter": {
+      "import": "./dist/emitter.mjs",
+      "require": "./dist/emitter.cjs"
+    },
+    "./runtime": {
+      "import": "./dist/runtime.mjs",
+      "require": "./dist/runtime.cjs"
+    },
+    "./package.json": "./package.json"
+  }
+}