docs: update README with pi install instructions and package info

README.md

@@ -4,21 +4,33 @@ Emits a sound alert when the context window reaches or exceeds **100 000 tokens*
 
 ## Installation
 
-### Option 1: Auto-discovered (recommended)
+### Via `pi install` (recommended)
+
+```bash
+pi install git:git.enne2.net/enne2/context-warn@main
+```
+
+Or pin to a specific tag:
+
+```bash
+pi install git:git.enne2.net/enne2/context-warn@v1.0.0
+```
+
+### Via `--extension` (test without installing)
+
+```bash
+pi -e git:git.enne2.net/enne2/context-warn
+```
+
+### Manual install
 
 ```bash
 mkdir -p ~/.pi/agent/extensions/context-warn
-cp -r /home/enne2/base/context-warn-extension/* ~/.pi/agent/extensions/context-warn/
+cp -r ~/.pi/agent/git/git.enne2.net/enne2/context-warn/* ~/.pi/agent/extensions/context-warn/
 ```
 
 Then reload pi with `/reload`.
 
-### Option 2: One-off with --extension
-
-```bash
-pi -e /home/enne2/base/context-warn-extension/index.ts
-```
-
 ## Features
 
 - **Sound alert**: Plays a pre-bundled WAV alert sound via `aplay` (no runtime generation)
@@ -34,7 +46,7 @@ pi -e /home/enne2/base/context-warn-extension/index.ts
 
 ## Configuration
 
-Edit these values at the top of `index.ts`:
+Edit these values at the top of `index.ts` in the installed package:
 
 | Constant | Default | Description |
 |----------|---------|-------------|
@@ -45,9 +57,10 @@ Edit these values at the top of `index.ts`:
 ## Dependencies
 
 - `aplay` (ALSA player) — for playing the WAV file
-- `sox` — only needed to **generate** a new alert.wav (optional)
+- `sox` — only needed to **generate** a new `alert.wav` (optional)
 
 Both are available on Fedora by default. On Ubuntu/Debian:
+
 ```bash
 sudo apt install alsa-utils sox libsox-fmt-all
 ```
@@ -56,7 +69,7 @@ sudo apt install alsa-utils sox libsox-fmt-all
 
 1. Listens to `turn_end` events (fired after every LLM response)
 2. Calls `ctx.getContextUsage()` to check current token count
-3. When tokens ≥ threshold, plays `alert.wav` via aplay
+3. When tokens ≥ threshold, plays `alert.wav` via `aplay`
 4. Shows a TUI notification and updates the status bar
 5. Resets alert state on `session_compact`
 
@@ -76,4 +89,16 @@ sox -n -t wav c.wav synth 0.55 sine 880 vol 0.65
 sox a.wav b.wav c.wav alert.wav
 ```
 
-Customize the tone by changing the frequency and volume parameters.
+## Package
+
+This is a pi package. To update to the latest version:
+
+```bash
+pi update git:git.enne2.net/enne2/context-warn
+```
+
+To remove:
+
+```bash
+pi remove git:git.enne2.net/enne2/context-warn
+```