README: document headless/server install path

[slavik0329]

Summary

• Adds a short "Headless / Server Install" section to the README for users installing PAI on a headless Linux server
• Documents the existing CLI-mode path (bun run PAI-Install/main.ts --mode cli) as an alternative to install.sh, which launches an Electron GUI and fails on headless boxes with libnss3.so errors
• No code changes — docs only

Test plan

• Rendered locally — section sits between the standard install block and the "Upgrading from a Previous Version" heading
• Commands verified against Releases/v4.0.3/.claude/PAI-Install/main.ts (the CLI wizard path already ships in v4.0.3)

[renoirb]

I had the same issue and I made a PR #1081 ... but the CLI option to be documented is a great idea

[danielmiessler]

Hey @slavik0329, thanks for raising this, and sorry it sat for a while.

We're changing how LifeOS ships. Instead of cloning a full ~/.claude directory and running it as a complete system, LifeOS is becoming a skill you install through an agentic installer. The installer hands integration to your own AI, which reads your actual machine (your OS, your paths, your harness) and wires the hooks and system prompt in where they belong.

That's aimed right at what you hit here. The old "one directory, one layout, hope it matches your setup" approach is exactly what broke for so many people, and the new model should handle it far better because your AI does the integration per machine instead of us guessing.

So we're closing this in prep for that release. If it still bites you once the skill-based version is out, reopen or file a fresh one and we'll jump on it. Appreciate you taking the time.