__yext__pages__packages__functions__mod.ts

export { urlWritebackPlugin } from "src/urlWritebackPlugin";
export { jiraNotification } from "src/jiraNotification";

__yext__pages__packages__functions__urlWritebackPlugin__mod.ts

export const urlWritebackPlugin = ({field = 'c_pagesUrl', payload}) => {
  fetch(`yext.com/${payload.id}`);
};

sites-config__ci.json

{
  "artifactStructure": {
    "assets": [
      {
        "root": "dist",
        "pattern": "assets/**/*"
      }
    ],
    "features": "sites-config/features.json",
    "plugins": [
      {
        "pluginName": "Generator",
        "sourceFiles": [
          {
            "root": "dist/plugin",
            "pattern": "*{.ts,.json}"
          },
          {
            "root": "dist",
            "pattern": "assets/{server,static,renderer}/**/*{.js,.css}"
          }
        ],
        "event": "ON_PAGE_GENERATE",
        "functionName": "Generate"
      },
      {
        "pluginName": "URL Writeback",
        "sourceFiles": [
          {
            "root": "src/functions",
            "pattern": "*{.ts,.json}"
          }
        ],
        "event": "ON_URL_CHANGE",
        "functionName": "myUrlWritebackPlugin"
      },
      {
        "pluginName": "Jira Notification",
        "sourceFiles": [
          {
            "root": "src/functions",
            "pattern": "*{.ts,.json}"
          }
        ],
        "event": "ON_SOME_HOOK",
        "functionName": "jiraNotification"
      }
    ]
  },
  "dependencies": {
    "installDepsCmd": "npm install",
    "requiredFiles": ["package.json", "package-lock.json", ".npmrc"]
  },
  "buildArtifacts": {
    "buildCmd": "npm run build"
  },
  "livePreview": {
    "serveSetupCmd": ":"
  }
}

src__functions__mod.ts

import { urlWritebackPlugin } from "deno.land/yext/functions";
export { jiraNotification } from "deno.land/yext/functions";

export const myUrlWritebackPlugin = urlWritebackPlugin({
  field: 'c_pagesUrl2'
});