add install links to readme

README.md

@@ -1,3 +1,53 @@
 # AI Coding Productivity Slides
 
-Open `ai-coding-productivity-apple-slides.html` in a browser to view the deck.
+Open `index.html` or `ai-coding-productivity-apple-slides.html` in a browser to view the deck.
+
+## Installation Links
+
+### macOS
+
+Codex:
+
+```bash
+curl -fsSL https://chatgpt.com/codex/install.sh | sh
+```
+
+Claude Code:
+
+```bash
+curl -fsSL https://claude.ai/install.sh | bash
+```
+
+Or:
+
+```bash
+brew install --cask claude-code
+```
+
+cc-switch:
+
+```bash
+brew install --cask cc-switch
+```
+
+Manual downloads:
+
+- Claude: https://claude.com/download
+- cc-switch: https://github.com/farion1231/cc-switch/releases/latest
+
+### Windows
+
+Claude Code:
+
+```powershell
+winget install Anthropic.ClaudeCode
+```
+
+cc-switch:
+
+- https://github.com/farion1231/cc-switch/releases/latest
+
+Codex:
+
+- https://developers.openai.com/codex/cli
+- https://chatgpt.com/codex/install.sh