Automatically append staff notice to user posts

Development
2

I think you can achieve this with theme components. For example, this code does what you need:

<script type="text/discourse-plugin" version="0.8">

const { iconHTML } = require("discourse-common/lib/icon-library");

const bot_id = 128856; // or some else
api.decorateWidget("post:before", (helper) => {
    if (helper?.getModel()?.user_id !== bot_id) {return;}
    return helper.h("div.post-notice",[
        helper.rawHtml(iconHTML("shield-alt")), // icon name
        helper.h("p", "this is a bot"),  // text
    ]);
});

</script>