add schema drift ci check

.github/workflows/ci.yml

@@ -27,6 +27,7 @@ jobs:
       android: ${{ steps.filter.outputs.android }}
       swift: ${{ steps.filter.outputs.swift }}
       reactNative: ${{ steps.filter.outputs.reactNative }}
+      protocolCodegen: ${{ steps.filter.outputs.protocolCodegen }}
       web: ${{ steps.filter.outputs.web }}
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
@@ -68,6 +69,13 @@ jobs:
               - '.github/workflows/rn-lint.yml'
               - '.github/workflows/breaking-changes.yml'
               - '.github/workflows/ci.yml'
+            protocolCodegen:
+              - 'protocol/**'
+              - 'platforms/react-native/package.json'
+              - 'platforms/react-native/pnpm-lock.yaml'
+              - '.github/actions/setup/**'
+              - '.github/workflows/protocol-codegen.yml'
+              - '.github/workflows/ci.yml'
             web:
               - 'platforms/web/**'
               - '.github/workflows/web.yml'
@@ -143,6 +151,12 @@ jobs:
     if: needs.changes.outputs.reactNative == 'true'
     uses: ./.github/workflows/rn-lint.yml
 
+  protocol-codegen:
+    name: Protocol
+    needs: changes
+    if: needs.changes.outputs.protocolCodegen == 'true'
+    uses: ./.github/workflows/protocol-codegen.yml
+
   web:
     name: Web
     needs: changes
@@ -184,6 +198,7 @@ jobs:
       - rn-build-ios
       - rn-check-packed-files
       - rn-lint
+      - protocol-codegen
       - web
       - breaking-changes
     runs-on: ubuntu-latest

.github/workflows/protocol-codegen.yml

@@ -0,0 +1,33 @@
+name: Protocol Codegen Drift
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Setup Node.js, pnpm, and install dependencies
+        uses: ./.github/actions/setup
+        with:
+          node-version-file: protocol/package.json
+          cache-dependency-path: protocol/pnpm-lock.yaml
+          package-json-file: protocol/package.json
+          working-directory: protocol
+
+      - name: Regenerate protocol models
+        run: |
+          pnpm --dir protocol run codegen:kotlin
+          pnpm --dir protocol run codegen:swift
+          pnpm --dir protocol run codegen:typescript
+
+      - name: Check generated files are current
+        run: git diff --exit-code

platforms/react-native/package.json

@@ -47,6 +47,7 @@
     "eslint-plugin-prettier": "^5.5.4",
     "jest": "^30.0.5",
     "prettier": "^3.2.5",
+    "quicktype": "23.2.6",
     "react": "19.1.0",
     "react-native": "0.80.2",
     "react-native-dotenv": "^3.4.11",

protocol/package.json

@@ -11,7 +11,11 @@
     "codegen:swift": "./scripts/generate_models.sh --lang swift",
     "codegen:typescript": "./scripts/generate_models.sh --lang typescript"
   },
+  "engines": {
+    "node": "22.14.0"
+  },
   "devDependencies": {
-    "quicktype": "23.2.6"
+    "quicktype": "23.2.6",
+    "typescript": "5.9.2"
   }
 }

protocol/scripts/codegen_tools.mjs

@@ -32,6 +32,7 @@ export const PROTOCOL_DIR = path.resolve(SCRIPT_DIR, "..");
 export const REPO_ROOT = path.resolve(PROTOCOL_DIR, "..");
 export const PACKAGE_JSON = path.join(PROTOCOL_DIR, "package.json");
 export const QUICKTYPE_BIN = path.join(PROTOCOL_DIR, "node_modules", ".bin", "quicktype");
+export const TSC_BIN = path.join(PROTOCOL_DIR, "node_modules", ".bin", "tsc");
 
 export function run(command, args, options = {}) {
   return new Promise((resolve, reject) => {
@@ -106,3 +107,29 @@ export async function requireQuicktype() {
     throw new Error(`Unsupported quicktype version: ${actual}. Expected ${expected} from ${PACKAGE_JSON}.`);
   }
 }
+
+export async function requireTypescript() {
+  if (!(await fileIsExecutable(TSC_BIN))) {
+    throw new Error(`TypeScript is required at ${TSC_BIN}. Run dev up or (cd protocol && pnpm install).`);
+  }
+
+  const packageJson = await readJson(PACKAGE_JSON);
+  const expected = packageJson.devDependencies?.typescript ?? "";
+  if (expected === "") {
+    throw new Error(`Missing TypeScript version in ${PACKAGE_JSON}`);
+  }
+
+  if (!/^[0-9]+[.][0-9]+[.][0-9]+(-[0-9A-Za-z.-]+)?$/.test(expected)) {
+    throw new Error(`TypeScript must use an exact version in ${PACKAGE_JSON}; found ${expected}.`);
+  }
+
+  const {stdout} = await run(TSC_BIN, ["--version"], {capture: true});
+  const actual = stdout.match(/^Version (\S+)/m)?.[1] ?? "";
+  if (actual === "") {
+    throw new Error(`Unable to determine TypeScript version from ${TSC_BIN}`);
+  }
+
+  if (actual !== expected) {
+    throw new Error(`Unsupported TypeScript version: ${actual}. Expected ${expected} from ${PACKAGE_JSON}.`);
+  }
+}

protocol/scripts/generate_models.mjs

@@ -30,8 +30,10 @@ import {
   PROTOCOL_DIR,
   QUICKTYPE_BIN,
   REPO_ROOT,
+  TSC_BIN,
   readJson,
   requireQuicktype,
+  requireTypescript,
   run,
 } from "./codegen_tools.mjs";
 
@@ -357,11 +359,10 @@ async function generateTypescript(specDir, output) {
   await run("node", [path.join(PROTOCOL_DIR, "scripts", "generate_typescript_notifications.mjs")]);
 
   const declarationOutput = path.join(PROTOCOL_DIR, "languages", "typescript", "src", "index.d.ts");
-  const tscBin = path.join(REPO_ROOT, "platforms", "react-native", "node_modules", "typescript", "bin", "tsc");
   const indexOutput = path.join(PROTOCOL_DIR, "languages", "typescript", "src", "index.ts");
 
-  await run("node", [
-    tscBin,
+  await requireTypescript();
+  await run(TSC_BIN, [
     "--declaration",
     "--emitDeclarationOnly",
     "--noEmit",