Keep the personal half of the desktop in one place, and ask before installing it

Agent instructions, skills, SSH host aliases and expansion triggers are worth
having identical on every machine one person owns, and belong in none of the
shared configuration. They live in user/ now, with a manifest saying where each
piece goes and a link-user stage that puts it there.

That stage does nothing unless the machine said yes. Somebody who clones Panama
to try the desktop keeps their own ~/.claude/CLAUDE.md exactly where it was;
the question names the destinations and defaults to no. Anything displaced goes
to config/old rather than being deleted.

~/.claude/CLAUDE.md and ~/.codex/AGENTS.md were byte-identical copies of one
file, which is the drift this exists to prevent.

Also adds the vitals toggles for the battery and Claude usage readouts, which
had preferences and no way to reach them.

user/agents/skills/slidev/references/core-cli.md

@@ -0,0 +1,140 @@
+---
+name: cli
+description: Slidev command-line interface reference
+---
+
+# CLI Commands
+
+Slidev command-line interface reference.
+
+## Dev Server
+
+```bash
+slidev [entry]
+slidev slides.md
+```
+
+Options:
+| Option | Default | Description |
+|--------|---------|-------------|
+| `--port` | 3030 | Server port |
+| `--open` | false | Open browser |
+| `--remote [password]` | - | Enable remote access |
+| `--bind` | 0.0.0.0 | Bind address |
+| `--base` | / | Base URL path |
+| `--log` | warn | Log level |
+| `--force` | false | Force optimizer re-bundle |
+| `--theme` | - | Override theme |
+
+Examples:
+```bash
+slidev --port 8080 --open
+slidev --remote mypassword
+slidev --base /talks/my-talk/
+```
+
+## Build
+
+```bash
+slidev build [entry]
+```
+
+Options:
+| Option | Default | Description |
+|--------|---------|-------------|
+| `--out` | dist | Output directory |
+| `--base` | / | Base URL for deployment |
+| `--download` | false | Include PDF download |
+| `--theme` | - | Override theme |
+| `--without-notes` | false | Exclude presenter notes |
+
+Examples:
+```bash
+slidev build --base /my-repo/
+slidev build --download --out public
+slidev build slides1.md slides2.md  # Multiple builds
+```
+
+## Export
+
+```bash
+slidev export [entry]
+```
+
+Options:
+| Option | Default | Description |
+|--------|---------|-------------|
+| `--output` | - | Output filename |
+| `--format` | pdf | pdf / png / pptx / md |
+| `--timeout` | 30000 | Timeout per slide (ms) |
+| `--range` | - | Slide range (e.g., 1,4-7) |
+| `--dark` | false | Export dark mode |
+| `--with-clicks` | false | Include click steps |
+| `--with-toc` | false | PDF table of contents |
+| `--wait` | 0 | Wait ms before export |
+| `--wait-until` | networkidle | Wait condition |
+| `--omit-background` | false | Transparent background |
+| `--executable-path` | - | Browser path |
+
+Examples:
+```bash
+slidev export
+slidev export --format pptx
+slidev export --format png --range 1-5
+slidev export --with-clicks --dark
+slidev export --timeout 60000 --wait 2000
+```
+
+## Format
+
+```bash
+slidev format [entry]
+```
+
+Formats the slides markdown file.
+
+## Theme Eject
+
+```bash
+slidev theme eject [entry]
+```
+
+Options:
+| Option | Default | Description |
+|--------|---------|-------------|
+| `--dir` | theme | Output directory |
+| `--theme` | - | Theme to eject |
+
+Extracts theme to local directory for customization.
+
+## npm Script Usage
+
+In package.json:
+```json
+{
+  "scripts": {
+    "dev": "slidev",
+    "build": "slidev build",
+    "export": "slidev export"
+  }
+}
+```
+
+With arguments (note `--`):
+```bash
+npm run dev -- --port 8080 --open
+npm run export -- --format pptx
+```
+
+## Boolean Options
+
+```bash
+slidev --open           # Same as --open true
+slidev --no-open        # Same as --open false
+```
+
+## Install CLI Globally
+
+```bash
+npm i -g @slidev/cli
+```