feat: add setup skill with scripted steps (#258)

Replace inline SKILL.md instructions with executable shell scripts
for each setup phase (environment check, deps, container, auth,
groups, channels, mounts, service, verify). Scripts emit structured
status blocks for reliable parsing.

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/setup/scripts/02-install-deps.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+set -euo pipefail
+
+# 02-install-deps.sh — Run npm install and verify key packages
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../../../.." && pwd)"
+LOG_FILE="$PROJECT_ROOT/logs/setup.log"
+
+mkdir -p "$PROJECT_ROOT/logs"
+
+log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] [install-deps] $*" >> "$LOG_FILE"; }
+
+cd "$PROJECT_ROOT"
+
+log "Running npm install"
+
+if npm install >> "$LOG_FILE" 2>&1; then
+  log "npm install succeeded"
+else
+  log "npm install failed"
+  cat <<EOF
+=== NANOCLAW SETUP: INSTALL_DEPS ===
+PACKAGES: failed
+STATUS: failed
+ERROR: npm_install_failed
+LOG: logs/setup.log
+=== END ===
+EOF
+  exit 1
+fi
+
+# Verify key packages
+MISSING=""
+for pkg in @whiskeysockets/baileys better-sqlite3 pino qrcode; do
+  if [ ! -d "$PROJECT_ROOT/node_modules/$pkg" ]; then
+    MISSING="$MISSING $pkg"
+  fi
+done
+
+if [ -n "$MISSING" ]; then
+  log "Missing packages after install:$MISSING"
+  cat <<EOF
+=== NANOCLAW SETUP: INSTALL_DEPS ===
+PACKAGES: failed
+STATUS: failed
+ERROR: missing_packages:$MISSING
+LOG: logs/setup.log
+=== END ===
+EOF
+  exit 1
+fi
+
+log "All key packages verified"
+
+cat <<EOF
+=== NANOCLAW SETUP: INSTALL_DEPS ===
+PACKAGES: installed
+STATUS: success
+LOG: logs/setup.log
+=== END ===
+EOF