Spec: voice assistant prototype phase

CLAUDE.md

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+# Assistant project
+
+Voice assistant on a Raspberry Pi, talking to OpenAI Realtime API for voice I/O.
+
+## Target device
+
+- Host: `assistant` (hostname), IP `192.168.50.115`
+- mDNS name `assistant.local` is NOT resolvable from this sandbox — use the IP.
+- OS: Debian (Raspberry Pi OS), kernel `6.12.75+rpt-rpi-v8`, aarch64
+- SSH user: `pi`, password: `assistant`
+
+## SSH access from this sandbox
+
+`ping` and `ssh`/`sshpass` are installed via apt (`iputils-ping`, `openssh-client`, `sshpass`). The host key is already in `~/.ssh/known_hosts`.
+
+Run a command on the Pi:
+
+```sh
+sshpass -p 'assistant' ssh pi@192.168.50.115 '<command>'
+```
+
+Copy a file to the Pi:
+
+```sh
+sshpass -p 'assistant' scp <local> pi@192.168.50.115:<remote>
+```