chore: add editor run/task configs and document editor setup

.gitattributes

@@ -1,8 +1,11 @@
-*       text=auto
+*               text=auto
 
-*.md    text eol=lf
-*.yml   text eol=lf
-*.yaml  text eol=lf
-*.json  text eol=lf
+*.md            text eol=lf
+*.xml           text eol=lf
+*.yml           text eol=lf
+*.yaml          text eol=lf
+*.json          text eol=lf
 
-pnpm-lock.yaml text eol=lf linguist-generated
+pnpm-lock.yaml  text eol=lf linguist-generated
+
+.run/*          linguist-generated

.gitignore

@@ -1,5 +1,8 @@
 .idea/
 .vscode/*
+!.vscode/extensions.json
+!.vscode/launch.json
+!.vscode/tasks.json
 
 .claude/worktrees/
 

.prettierignore

@@ -14,4 +14,6 @@ pnpm-lock.yaml
 
 .idea/
 .vscode/*
-.vscode/extensions.json
+!.vscode/extensions.json
+!.vscode/launch.json
+!.vscode/tasks.json

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+    "recommendations": ["esbenp.prettier-vscode", "editorconfig.editorconfig", "davidanson.vscode-markdownlint"]
+}

.vscode/launch.json

@@ -0,0 +1,4 @@
+{
+    "version": "0.2.0",
+    "configurations": []
+}

.vscode/tasks.json

@@ -0,0 +1,26 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "type": "npm",
+            "script": "format",
+            "label": "format",
+            "detail": "prettier -w .",
+            "problemMatcher": []
+        },
+        {
+            "type": "npm",
+            "script": "format-check",
+            "label": "format-check",
+            "detail": "prettier -l .",
+            "problemMatcher": []
+        },
+        {
+            "type": "npm",
+            "script": "lint-md",
+            "label": "lint-md",
+            "detail": "markdownlint-cli2",
+            "problemMatcher": []
+        }
+    ]
+}

README.md

@@ -2,6 +2,10 @@
 
 Template repository for bootstrapping new `dnd-mapp` repositories, with shared tooling and CI pre-configured.
 
+## Prerequisites
+
+- [mise](https://mise.jdx.dev/) (recommended): manages the Node.js and pnpm versions this repo pins in `package.json`'s `devEngines` field. Run `mise install` after installing it to pick up matching versions automatically.
+
 ## Installation
 
 Click **Use this template** on GitHub to create a new repository from this one. In the new repository, install dependencies and set up the Husky git hooks:
@@ -12,6 +16,21 @@ pnpm install
 
 Then update `package.json`'s `name` and `description`, and this README, to match the new repository.
 
+## Editor setup
+
+Configure your editor to run Prettier on save, so files match this repo's `.prettierrc.json` without needing `pnpm format` before every commit.
+
+- **VS Code**: install the recommended [Prettier extension](https://marketplace.visualstudio.com/items?itemName=esbenp.prettier-vscode) (VS Code prompts for it automatically via `.vscode/extensions.json`), then add to your `settings.json`:
+
+  ```json
+  {
+      "editor.defaultFormatter": "esbenp.prettier-vscode",
+      "editor.formatOnSave": true
+  }
+  ```
+
+- **WebStorm**: open Settings → Languages & Frameworks → JavaScript → Prettier, and check **Run on save**. WebStorm auto-detects the local `prettier` package and this repo's config.
+
 ## Usage
 
 ```bash