Initial commit: project docs and ignore rules

README.md

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+# AI Smart Speaker 4
+
+ESP-IDF project: **xiaozhi-esp32** voice assistant / smart-speaker stack (hardware-specific `sdkconfig` and components under `xiaozhi-esp32/`).
+
+## Build
+
+```bash
+cd xiaozhi-esp32
+idf.py set-target <your_soc>
+idf.py build
+idf.py -p PORT flash monitor
+```
+
+## Related
+
+Overlaps conceptually with `ai homie/`, `carputer ai/`, and `esp32 ai freind/` — compare trees before maintaining parallel remotes. Index: [`WORKSPACE.md`](../WORKSPACE.md).