docs: GoReleaser, GitHub Actions CI, and README

Author: Astro-Han

.github/workflows/release.yml

@@ -0,0 +1,20 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  release:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: stable
+      - uses: goreleaser/goreleaser-action@v6
+        with:
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

@@ -0,0 +1,29 @@
+version: 2
+
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+    ldflags:
+      - -s
+      - -w
+
+brews:
+  - repository:
+      owner: Astro-Han
+      name: homebrew-tap
+    homepage: https://github.com/Astro-Han/diffpane
+    description: Real-time TUI diff viewer for AI coding agents
+    license: MIT
+
+checksum:
+  name_template: checksums.txt
+
+release:
+  github:
+    owner: Astro-Han
+    name: diffpane

README.md

@@ -2,14 +2,7 @@
 
 Real-time TUI diff viewer for AI coding agents.
 
-Split your terminal. Left: your AI agent. Right: `diffpane` showing every change as it happens.
-
-## Features
-
-- **Live diff** — watches your git worktree and shows changes in real time
-- **Session baseline** — records HEAD at startup, auto-resets on commit
-- **Follow mode** — auto-jumps to the latest changed file (on by default)
-- **Zero dependencies** — single binary, `brew install` and go
+Watch what your AI agent is changing, in real-time, right next to your terminal.
 
 ## Install
 
@@ -26,23 +19,21 @@ cd your-project
 diffpane
 ```
 
+Split your terminal. Left: run your AI agent. Right: `diffpane` shows what changed.
+
 ## Keys
 
 | Key | Action |
 |-----|--------|
-| `j` / `k` | Scroll diff |
-| `n` / `p` | Next / previous file |
+| `j`/`k` | Scroll diff |
+| `n`/`p` | Next/prev file |
 | `f` | Toggle follow mode |
 | `Tab` | File list |
 | `q` | Quit |
 
 ## How it works
 
-`diffpane` records your current `git HEAD` when it starts (the "baseline"). It watches for file changes and shows 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.
-
-## Status
-
-Under development. Not yet functional.
+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.
 
 ## License