feat: add deploy skill with build/flash guide and helper scripts

- SKILL.md: full deployment guide covering prerequisites, config,
  build, flash, verification, OTA, and troubleshooting
- deploy.sh: one-command build+flash script with auto port detection
- validate.sh: pre-deploy checklist (ESP-IDF, secrets, hardware)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/deploy/scripts/deploy.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+# MimiClaw Quick Deploy Script
+# Usage: ./skills/deploy/scripts/deploy.sh [port]
+#
+# This script handles the full build-flash cycle:
+# 1. Checks prerequisites
+# 2. Ensures mimi_secrets.h exists
+# 3. Builds the firmware
+# 4. Auto-detects or uses specified serial port
+# 5. Flashes and opens monitor
+
+set -euo pipefail
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m'
+
+info()  { echo -e "${GREEN}[+]${NC} $*"; }
+warn()  { echo -e "${YELLOW}[!]${NC} $*"; }
+error() { echo -e "${RED}[x]${NC} $*"; exit 1; }
+
+# Find project root (where this script lives: skills/deploy/scripts/)
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../.." && pwd)"
+cd "$PROJECT_ROOT"
+
+info "MimiClaw Deploy — project: $PROJECT_ROOT"
+
+# Check ESP-IDF
+if ! command -v idf.py &>/dev/null; then
+    error "ESP-IDF not found. Source export.sh first:\n  source \$IDF_PATH/export.sh"
+fi
+
+IDF_VER=$(idf.py --version 2>&1 | head -1)
+info "ESP-IDF: $IDF_VER"
+
+# Check secrets
+if [ ! -f main/mimi_secrets.h ]; then
+    warn "main/mimi_secrets.h not found — creating from example"
+    cp main/mimi_secrets.h.example main/mimi_secrets.h
+    warn "Edit main/mimi_secrets.h with your credentials, then re-run this script"
+    exit 1
+fi
+
+# Check if secrets are configured (WiFi SSID not empty)
+if grep -q 'MIMI_SECRET_WIFI_SSID.*""' main/mimi_secrets.h; then
+    error "WiFi SSID is empty in main/mimi_secrets.h — edit it first"
+fi
+
+# Build
+info "Building firmware (fullclean)..."
+idf.py fullclean >/dev/null 2>&1 || true
+idf.py build 2>&1 | tail -5
+
+if [ ! -f build/mimiclaw.bin ]; then
+    error "Build failed — check errors above"
+fi
+
+BIN_SIZE=$(stat -f%z build/mimiclaw.bin 2>/dev/null || stat -c%s build/mimiclaw.bin 2>/dev/null)
+info "Firmware built: build/mimiclaw.bin ($(( BIN_SIZE / 1024 )) KB)"
+
+# Detect serial port
+PORT="${1:-}"
+if [ -z "$PORT" ]; then
+    # Auto-detect
+    if [ "$(uname)" = "Darwin" ]; then
+        PORT=$(ls /dev/cu.usbmodem* 2>/dev/null | head -1)
+    else
+        PORT=$(ls /dev/ttyACM* /dev/ttyUSB* 2>/dev/null | head -1)
+    fi
+fi
+
+if [ -z "$PORT" ]; then
+    error "No serial port found. Plug in your ESP32-S3 or specify port:\n  $0 /dev/cu.usbmodem1101"
+fi
+
+info "Serial port: $PORT"
+
+# Flash
+info "Flashing..."
+idf.py -p "$PORT" flash 2>&1 | tail -10
+
+info "Flash complete!"
+echo ""
+info "Opening serial monitor (Ctrl+] to exit)..."
+echo ""
+
+idf.py -p "$PORT" monitor