Begin working on an attempt to make the required setting, but be blocked by Foundry for listening to open/close events on the prose-mirror editor

module/apps/PlayerSheet.mjs

@@ -64,6 +64,33 @@ export class PlayerSheet extends HandlebarsApplicationMixin(ActorSheetV2) {
 		return super._initializeApplicationOptions(options);
 	};
 
+	/** @type {boolean | null} */
+	#inEditMode = null;
+	async _onFirstRender(context, options) {
+		super._onFirstRender(context, options);
+		console.log(`_onFirstRender`)
+		this.#inEditMode ??= game.settings.get(__ID__, `openSheetInEdit`) ?? false;
+		this.element.querySelectorAll(`prose-mirror`).forEach(editor => {
+			editor.open = this.#inEditMode;
+		});
+	};
+
+	async _onRender(context, options) {
+		super._onRender(context, options);
+
+		if (options.parts?.includes(`content`)) {
+			const el = this.element.querySelector(`prose-mirror[name="system.content"]`);
+			el?.addEventListener(`open`, () => {
+				console.log(`event: open`);
+				this.#inEditMode = true;
+			});
+			el?.addEventListener(`close`, () => {
+				console.log(`event: close`);
+				this.#inEditMode = false;
+			});
+		};
+	};
+
 	_getHeaderControls() {
 		const controls = super._getHeaderControls();
 
@@ -125,7 +152,9 @@ export class PlayerSheet extends HandlebarsApplicationMixin(ActorSheetV2) {
 		ctx.attrs = attrs.toSorted(attributeSorter);
 	};
 
+	/** @type {boolean | null} */
 	async _prepareContent(ctx) {
+
 		const TextEditor = foundry.applications.ux.TextEditor.implementation;
 		ctx.enriched = {
 			system: {

module/hooks/init.mjs

@@ -10,6 +10,7 @@ import { TAFItem } from "../documents/Item.mjs";
 import { TAFTokenDocument } from "../documents/Token.mjs";
 
 // Settings
+import { registerUserSettings } from "../settings/user.mjs";
 import { registerWorldSettings } from "../settings/world.mjs";
 
 // Utils
@@ -41,6 +42,7 @@ Hooks.on(`init`, () => {
 	);
 
 	registerWorldSettings();
+	registerUserSettings();
 
 	registerSockets();
 	registerCustomComponents();

module/settings/user.mjs

@@ -0,0 +1,12 @@
+import { __ID__ } from "../consts.mjs";
+
+export function registerUserSettings() {
+	game.settings.register(__ID__, `openSheetInEdit`, {
+		name: `taf.settings.openSheetInEdit.name`,
+		hint: `taf.settings.openSheetInEdit.hint`,
+		config: true,
+		type: Boolean,
+		default: false,
+		scope: `user`,
+	});
+};