Readme update

README.md

@@ -4,48 +4,66 @@
 
 # `gradient-engineer` — 60‑Second Linux Analysis (Nix + LLM)
 
-Run the classic [“60‑second Linux Performance Analysis”](https://netflixtechblog.com/linux-performance-analysis-in-60-000-milliseconds-accc10403c55) checklist in one command. A portable Nix toolbox is downloaded on the fly, diagnostics run in parallel with a simple TUI, and an optional AI summary is shown at the end.
+Run the classic [60‑second Linux Performance Analysis](https://netflixtechblog.com/linux-performance-analysis-in-60-000-milliseconds-accc10403c55) checklist on Linux or macOS. This tool enhances the original playbook with a few key improvements:
 
-- One command to run it all
-- Fast and portable
-- No Docker, no system‑wide installs
-- Optional AI summary
+- **One command**: Run the entire analysis with a single line.
+- **Fast**: Completes the analysis in about 6 seconds.
+- **Solves `command not found`**: Downloads a portable [Nix](https://nixos.org/) toolbox on the fly, so you don't need to install missing tools like `iostat` during a crisis.
+- **No dependencies**: Requires no `sudo`, Docker, or permanent installation.
+- **AI Summary**: Provides an optional, human-readable summary of the results.
+
+More details in the blog post: [60-Second Linux Analysis with Nix and LLMs](https://quesma.com/blog/60s-linux-analysis-nix-llms/).
 
 > [!NOTE]  
 > This project is an early experiment.
 
 ## Quick Start
 
-```bash
-# Any provider works; set one of these env vars to enable AI summary
-export ANTHROPIC_API_KEY="<your Anthropic API key>"   # Anthropic
-export OPENAI_API_KEY="<your OpenAI API key>"         # OpenAI
-export OPENROUTER_API_KEY="<your OpenRouter API key>" # OpenRouter
+Run the following command in your terminal. It works on both Linux and macOS.
 
+```bash
 curl -fsSL https://gradient.engineer/60-second-linux.sh | sh
 ```
 
-Notes:
+To enable the optional AI summary, set an API key _before_ running the script:
+
+```bash
+export ANTHROPIC_API_KEY="<your Anthropic API key>"   # OR
+export OPENAI_API_KEY="<your OpenAI API key>"         # OR
+export OPENROUTER_API_KEY="<your OpenRouter API key>"
+```
 
-- If no key is set, diagnostics still run; only the AI summary is skipped.
-- TUI controls: Tab toggles details; q / Esc / Ctrl+C quits.
+**Notes:**
 
-## Demo - See It in Action!
+- If no key is set, the AI summary is skipped.
+- Use `Tab` to toggle details in the TUI; `q` / `Esc` / `Ctrl+C` quits.
+
+## Demo
 
 [![asciicast](https://asciinema.org/a/738144.svg)](https://asciinema.org/a/738144)
 
 ## Build from Source
 
+Requires [Go 1.25 or newer](https://go.dev/).
+
 ```bash
-cd app
+git clone https://github.com/QuesmaOrg/gradient-engineer.git
+cd gradient-engineer/app
 go build -o gradient-engineer-go
-./gradient-engineer-go 60-second-linux
+
+# Run for your platform:
+./gradient-engineer-go 60-second-linux  # for Linux
+./gradient-engineer-go 60-second-darwin # for macOS
 ```
 
 ## Advanced
 
 - You can override the API base URL via `OPENAI_BASE_URL` (for OpenAI/OpenRouter) if needed.
 
+## Contributing
+
+This is an early prototype, and we're just getting started. The repository is open-source, and we're excited to explore what's possible. Have a look at the current [playbooks](./playbook/). We started with the classic, but we bet you have your own favorite commands—feel free to contribute them!
+
 ## License
 
 This project is licensed under the MIT License. See the `LICENSE` file for details.