@@ -4,4 +4,4 @@
 ARG VARIANT="14-buster"
 FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-${VARIANT}
 
-RUN sudo -u node npm install -g gulp-cli
+RUN sudo -u node npm install -g hereby
@@ -4,7 +4,7 @@ Thank you for submitting a pull request!
 Please verify that:
 * [ ] There is an associated issue in the `Backlog` milestone (**required**)
 * [ ] Code is up-to-date with the `main` branch
-* [ ] You've successfully run `gulp runtests` locally
+* [ ] You've successfully run `hereby runtests` locally
 * [ ] There are new or updated unit tests validating the change
 
 Refer to CONTRIBUTING.MD for more details.
 
@@ -17,8 +17,8 @@ jobs:
         git config user.name "TypeScript Bot"
         npm install
         git rm -r --quiet tests/baselines/reference :^tests/baselines/reference/docker :^tests/baselines/reference/user
-        gulp runtests-parallel --ci --fix || true
-        gulp baseline-accept
+        npx hereby runtests-parallel --ci --fix || true
+        npx hereby baseline-accept
         git add ./src
         git add ./tests/baselines/reference
         git diff --cached
 
@@ -69,11 +69,8 @@ jobs:
     - name: Adding playwright
       run: npm install --no-save --no-package-lock playwright
 
-    - name: Build local
-      run: gulp local
-
     - name: Validate the browser can import TypeScript
-      run: gulp test-browser-integration
+      run: npx hereby test-browser-integration
 
   typecheck:
     runs-on: ubuntu-latest
@@ -102,10 +99,10 @@ jobs:
     - run:  npm ci
 
     - name: Build scripts
-      run: gulp scripts
+      run: npx hereby scripts
 
     - name: ESLint tests
-      run: gulp run-eslint-rules-tests
+      run: npx hereby run-eslint-rules-tests
 
   self-check:
     runs-on: ubuntu-latest
@@ -119,10 +116,10 @@ jobs:
     - run:  npm ci
 
     - name: Build tsc
-      run: gulp tsc
+      run: npx hereby tsc
 
     - name: Clean
-      run: gulp clean-src
+      run: npx hereby clean-src
 
     - name: Self build
-      run: gulp build-src --built
+      run: npx hereby build-src --built
@@ -21,7 +21,7 @@ jobs:
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/tsserverlibrary.d.ts
         sed -i -e 's/const version\(: string\)\{0,1\} = `${versionMajorMinor}.0-.*`/const version = `${versionMajorMinor}.0-${{ github.event.client_payload.core_tag || 'dev' }}`/g' src/compiler/corePublic.ts
         npm ci
-        gulp LKG
+        npx hereby LKG
         npm test
         git diff
         git add package.json
 
@@ -23,10 +23,10 @@ jobs:
       run: |
         npm whoami
         npm ci
-        gulp configure-nightly
-        gulp LKG
-        gulp runtests-parallel
-        gulp clean
+        npx hereby configure-nightly
+        npx hereby LKG
+        npx hereby runtests-parallel
+        npx hereby clean
         npm publish --tag next
       env:
         NODE_AUTH_TOKEN: ${{secrets.npm_token}}
@@ -19,11 +19,11 @@ jobs:
     - name: Adding playwright
       run: npm install --no-save --no-package-lock playwright
     - name: Validate the browser can import TypeScript
-      run: gulp test-browser-integration
+      run: npx hereby test-browser-integration
     - name: LKG, clean, and pack
       run: |
-        gulp LKG
-        gulp clean
+        npx hereby LKG
+        npx hereby clean
         npm pack ./
         mv typescript-*.tgz typescript.tgz
     - name: Upload built tarfile
 
@@ -27,7 +27,7 @@ jobs:
         sed -i -e 's/const versionMajorMinor = ".*"/const versionMajorMinor = "${{ github.event.client_payload.core_major_minor }}"/g' tests/baselines/reference/api/tsserverlibrary.d.ts
         sed -i -e 's/const version\(: string\)\{0,1\} = .*;/const version = "${{ github.event.client_payload.package_version }}" as string;/g' src/compiler/corePublic.ts
         npm ci
-        gulp LKG
+        npx hereby LKG
         npm test
         git diff
         git add package.json
 
@@ -16,7 +16,7 @@ jobs:
         git config user.email "typescriptbot@microsoft.com"
         git config user.name "TypeScript Bot"
         npm ci
-        gulp LKG
+        npx hereby LKG
         npm test
         git diff
         git add ./lib
 
@@ -0,0 +1,19 @@
+const cp = require("child_process");
+const path = require("path");
+const chalk = require("chalk");
+
+const argv = process.argv.slice(2);
+
+// --tasks-simple is used by VS Code to infer a task list; try and keep that working.
+if (!argv.includes("--tasks-simple")) {
+    console.error(chalk.yellowBright("Warning: using gulp shim; please consider running hereby directly."));
+}
+
+const args = [
+    ...process.execArgv,
+    path.join(__dirname, "node_modules", "hereby", "bin", "hereby.js"),
+    ...argv,
+];
+
+const { status } = cp.spawnSync(process.execPath, args, { stdio: "inherit" });
+process.exit(status ?? 1);