diff --git a/.github/dependabot.yml b/.github/dependabot.yml
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+# Monthly updates, grouped into one pull request per ecosystem.
+# Actions are pinned to commit SHAs: Dependabot bumps the SHA and the version comment together.
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
+    groups:
+      actions:
+        patterns: ["*"]
+    commit-message:
+      prefix: ci
diff --git a/README.md b/README.md
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+<picture>
+  <source media="(prefers-color-scheme: dark)" srcset="svg/sg-readme-dark.svg">
+  <img alt="Solid Geeks" src="svg/sg-readme-light.svg" width="480">
+</picture>
+
+# Solid Geeks logo kit
+
+The Solid Geeks logo, in every version and size, with the rules for using it. Read the **[usage guide](GUIDE.md)** first: colours, clear space, minimum sizes and don'ts.
+
+| Folder | What is in it |
+|---|---|
+| `svg/` | The masters, in vector: horizontal, stacked, symbol only, name only, and a pixel-drawn small-size symbol, most of them in several colour versions (dark, ink, black, white, Volt) |
+| `png/` | Ready-to-use exports: the avatar (1024 px), the GitHub social preview (1280 × 640), README logos |
+| `web/` | Everything a website needs: favicons, app icons, `site.webmanifest`, and `head-snippet.html` to paste into the `<head>` |
+| `presentation/` | The presentation board of the final identity (`board.html`) and its slides |
+
+## Quick picks
+
+- **GitHub or Discord avatar:** `png/sg-avatar-1024.png`, made to survive the round crop
+- **A README, light and dark:** the `<picture>` snippet at the top of this file, with `svg/sg-readme-light.svg` and `svg/sg-readme-dark.svg`
+- **A website:** copy `web/` next to the page and paste `web/head-snippet.html` into its `<head>`
+- **Below 32 px:** `svg/sg-symbol-small.svg`, drawn pixel by pixel for small sizes
+
+Colours: **Volt** `#C8FF2E` and **Ink** `#0D0F0C`. Never Volt on white.
+
+## Using the name and the logo
+
+The name and the logo are trademarks of the project: use them to refer to Solid Geeks, not to suggest an endorsement. See [LICENSE.md](LICENSE.md).