README + idempotent setup script (MeloTTS venv, checkpoint, sanity checks)

👾 Generated with [Letta Code](https://letta.com)

Co-Authored-By: Letta Code <noreply@letta.com>

README.md

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+# inferon
+
+Voice interface daemon for [Letta Code](https://letta.com) agents. Lives in your system tray; click to talk, click to send — your speech is transcribed, sent to an agent, and the reply is spoken back.
+
+**name**: **infer**ence + in**fer**nal + **infer**on (a particle), with symbolic inference planned for later.
+
+## Pipeline
+
+```
+tray click → pw-record (16kHz mono WAV)
+           → whisper.cpp server (spawned & owned by inferon, :50153)
+           → letta CLI (agent conversation, multi-turn)
+           → MeloTTS (melo_server.py subprocess, British English voice)
+           → pw-play
+```
+
+All backends are subprocesses owned by inferon: they die when it dies (tray quit, SIGINT, SIGTERM — signal handlers included).
+
+## Requirements
+
+- Zig 0.16
+- Qt 6 (qt6-base) + GCC toolchain
+- PipeWire (`pw-record`, `pw-play`)
+- [whisper.cpp](https://github.com/ggleron/whisper.cpp) built with `whisper-server` (defaults expect `~/Projects/whisper.cpp`, large-v3-turbo q5_0)
+- `letta` CLI on PATH, logged in
+- Python 3.11 (via [uv](https://docs.astral.sh/uv/)) for MeloTTS
+
+## Setup
+
+```bash
+./setup.sh          # clones MeloTTS, builds venv, downloads checkpoint
+zig build
+zig-out/bin/inferon
+```
+
+Paths (whisper binary/model, MeloTTS root, agent ID) are constants at the top of `src/whisper.zig`, `src/melo.zig`, `scripts/melo_server.py`, and `src/main.zig`.
+
+## Usage
+
+- **Left-click**: start / stop recording. After you stop, the pipeline runs: transcribe → agent → spoken reply → idle.
+- **Right-click → End conversation / Quit**: menu.
+- Tray dot color = state: grey idle · red recording · orange transcribing · blue thinking · green speaking · magenta backend error.
+
+Temp audio lives in `/tmp/inferon/` and is cleaned up as it's consumed (logs stay).

setup.sh

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+#!/bin/bash
+# inferon setup: MeloTTS venv + checkpoint + whisper.cpp sanity check.
+# Idempotent — safe to re-run.
+set -euo pipefail
+
+MELO_ROOT="$HOME/Projects/MeloTTS"
+WHISPER_ROOT="$HOME/Projects/whisper.cpp"
+CKPT_DIR="$MELO_ROOT/ckpt/MeloTTS-English-v3"
+HF_BASE="https://huggingface.co/myshell-ai/MeloTTS-English-v3/resolve/main"
+
+say() { printf '\033[1;36m[setup]\033[0m %s\n' "$*"; }
+
+# ---------------------------------------------------------------- MeloTTS ---
+
+if [ ! -d "$MELO_ROOT" ]; then
+    say "cloning MeloTTS -> $MELO_ROOT"
+    git clone --depth 1 https://github.com/myshell-ai/MeloTTS "$MELO_ROOT"
+else
+    say "MeloTTS repo present"
+fi
+
+if [ ! -x "$MELO_ROOT/.venv/bin/python" ]; then
+    say "creating Python 3.11 venv (uv)"
+    command -v uv >/dev/null || { say "ERROR: uv not found — install from https://docs.astral.sh/uv/"; exit 1; }
+    (cd "$MELO_ROOT" && uv venv --python 3.11 .venv)
+fi
+
+if [ ! -e "$MELO_ROOT/.venv/.deps-done" ]; then
+    say "installing Python deps (English set; Japanese stubs needed by import chain)"
+    grep -v -E "^gradio$|^tensorboard" "$MELO_ROOT/requirements.txt" \
+        | uv pip install -r /dev/stdin --python "$MELO_ROOT/.venv/bin/python"
+    uv pip install "setuptools<81" mecab-python3==1.0.9 unidic-lite==1.0.8 pykakasi==2.2.1 fugashi==1.3.0 \
+        --python "$MELO_ROOT/.venv/bin/python"
+    "$MELO_ROOT/.venv/bin/python" -c "import nltk; nltk.download('averaged_perceptron_tagger_eng')"
+    touch "$MELO_ROOT/.venv/.deps-done"
+else
+    say "Python deps already installed"
+fi
+
+if [ ! -f "$CKPT_DIR/checkpoint.pth" ]; then
+    say "downloading MeloTTS-English-v3 checkpoint (~200MB)"
+    mkdir -p "$CKPT_DIR"
+    curl -L --fail -o "$CKPT_DIR/checkpoint.pth" "$HF_BASE/checkpoint.pth"
+    curl -L --fail -o "$CKPT_DIR/config.json" "$HF_BASE/config.json"
+else
+    say "checkpoint present"
+fi
+
+# --------------------------------------------------------------- whisper ---
+
+if [ ! -x "$WHISPER_ROOT/build/bin/whisper-server" ]; then
+    say "WARNING: whisper-server not found at $WHISPER_ROOT/build/bin/whisper-server"
+    say "         build whisper.cpp (cmake -B build && cmake --build build) and"
+    say "         put the large-v3-turbo q5_0 model in $WHISPER_ROOT/models/"
+else
+    say "whisper-server OK"
+fi
+
+# ----------------------------------------------------------------- misc ----
+
+command -v letta >/dev/null || say "WARNING: letta CLI not on PATH"
+command -v pw-record >/dev/null || say "WARNING: pw-record not found (pipewire-tools)"
+
+say "done. build with: zig build"