docs: move installation section up in README

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

README.md

@@ -14,6 +14,18 @@ _Warning: Not for people who enjoy inconsistent and sloppy results._
 
 ---
 
+## Installation
+
+```bash
+npx get-shit-done-cc
+```
+
+That's it. Works on Mac, Windows, and Linux.
+
+Verify: `/gsd:help`
+
+---
+
 ## Why I Built This
 
 I'm a solo developer. I don't write code — Claude Code does.
@@ -174,18 +186,6 @@ Not for people who enjoy inconsistent and sloppy results.
 
 ---
 
-## Installation
-
-```bash
-npx get-shit-done-cc
-```
-
-That's it. Works on Mac, Windows, and Linux.
-
-Verify: `/gsd:help`
-
----
-
 ## License
 
 MIT License. See [LICENSE](LICENSE) for details.