docs: update README for v0.1.0 release

Author: Astro-Han

README.md

@@ -6,12 +6,14 @@ Watch what your AI agent is changing, in real-time, right next to your terminal.
 
 ## Install
 
+Download the latest binary from [Releases](https://github.com/Astro-Han/diffpane/releases).
+
+Or build from source:
+
 ```bash
-brew install Astro-Han/tap/diffpane
+go install github.com/Astro-Han/diffpane@latest
 ```
 
-Or download from [Releases](https://github.com/Astro-Han/diffpane/releases).
-
 ## Usage
 
 ```bash
@@ -21,6 +23,8 @@ diffpane
 
 Split your terminal. Left: run your AI agent. Right: `diffpane` shows what changed.
 
+diffpane records your current git HEAD when it starts (the "baseline"). It watches for file changes and shows you a live unified diff of everything that changed since the baseline. When you `git commit`, the baseline auto-resets so you only see new changes.
+
 ## Keys
 
 | Key | Action |
@@ -31,9 +35,10 @@ Split your terminal. Left: run your AI agent. Right: `diffpane` shows what chang
 | `Tab` | File list |
 | `q` | Quit |
 
-## How it works
+## Requirements
 
-diffpane records your current git HEAD when it starts (the "baseline"). It watches for file changes and shows you a live diff of everything that changed since the baseline. When you `git commit`, the baseline auto-resets so you only see new changes.
+- macOS (darwin/amd64 or darwin/arm64)
+- Git
 
 ## License