Update scripts to keep SOUL.md idempotent. Add release upgrade framework.

bin/mosaic-release-upgrade

@@ -0,0 +1,124 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# mosaic-release-upgrade — Upgrade installed Mosaic framework release.
+#
+# This re-runs the remote installer with explicit install mode controls.
+# Default behavior is safe/idempotent (keep SOUL.md + memory).
+#
+# Usage:
+#   mosaic-release-upgrade
+#   mosaic-release-upgrade --ref main --keep
+#   mosaic-release-upgrade --ref v0.2.0 --overwrite --yes
+
+MOSAIC_HOME="${MOSAIC_HOME:-$HOME/.config/mosaic}"
+REMOTE_SCRIPT_URL="${MOSAIC_REMOTE_INSTALL_URL:-https://git.mosaicstack.dev/mosaic/bootstrap/raw/branch/main/remote-install.sh}"
+BOOTSTRAP_REF="${MOSAIC_BOOTSTRAP_REF:-main}"
+INSTALL_MODE="${MOSAIC_INSTALL_MODE:-keep}" # keep|overwrite
+YES=false
+DRY_RUN=false
+
+usage() {
+  cat <<USAGE
+Usage: $(basename "$0") [options]
+
+Upgrade the installed Mosaic framework release.
+
+Options:
+  --ref <name>         Bootstrap archive ref (branch/tag/commit). Default: main
+  --keep               Keep local files (SOUL.md, memory/) during upgrade (default)
+  --overwrite          Overwrite target install directory contents
+  -y, --yes            Skip confirmation prompt
+  --dry-run            Show actions without executing
+  -h, --help           Show this help
+USAGE
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --ref)
+      [[ $# -lt 2 ]] && { echo "Missing value for --ref" >&2; exit 1; }
+      BOOTSTRAP_REF="$2"
+      shift 2
+      ;;
+    --keep)
+      INSTALL_MODE="keep"
+      shift
+      ;;
+    --overwrite)
+      INSTALL_MODE="overwrite"
+      shift
+      ;;
+    -y|--yes)
+      YES=true
+      shift
+      ;;
+    --dry-run)
+      DRY_RUN=true
+      shift
+      ;;
+    -h|--help)
+      usage
+      exit 0
+      ;;
+    *)
+      echo "Unknown argument: $1" >&2
+      usage >&2
+      exit 1
+      ;;
+  esac
+done
+
+case "$INSTALL_MODE" in
+  keep|overwrite) ;;
+  *)
+    echo "[mosaic-release-upgrade] Invalid install mode: $INSTALL_MODE" >&2
+    exit 1
+    ;;
+esac
+
+current_version="unknown"
+if [[ -x "$MOSAIC_HOME/bin/mosaic" ]]; then
+  current_version="$("$MOSAIC_HOME/bin/mosaic" --version 2>/dev/null | awk '{print $2}' || true)"
+  [[ -n "$current_version" ]] || current_version="unknown"
+fi
+
+echo "[mosaic-release-upgrade] Current version: $current_version"
+echo "[mosaic-release-upgrade] Target ref: $BOOTSTRAP_REF"
+echo "[mosaic-release-upgrade] Install mode: $INSTALL_MODE"
+echo "[mosaic-release-upgrade] Installer URL: $REMOTE_SCRIPT_URL"
+
+if [[ "$DRY_RUN" == "true" ]]; then
+  echo "[mosaic-release-upgrade] Dry run: no changes applied."
+  exit 0
+fi
+
+if [[ "$YES" != "true" && -t 0 ]]; then
+  printf "Proceed with Mosaic release upgrade? [y/N]: "
+  read -r confirm
+  case "${confirm:-n}" in
+    y|Y|yes|YES) ;;
+    *)
+      echo "[mosaic-release-upgrade] Aborted."
+      exit 1
+      ;;
+  esac
+fi
+
+if command -v curl >/dev/null 2>&1; then
+  curl -sL "$REMOTE_SCRIPT_URL" | \
+    MOSAIC_BOOTSTRAP_REF="$BOOTSTRAP_REF" \
+    MOSAIC_INSTALL_MODE="$INSTALL_MODE" \
+    MOSAIC_HOME="$MOSAIC_HOME" \
+    sh
+elif command -v wget >/dev/null 2>&1; then
+  wget -qO- "$REMOTE_SCRIPT_URL" | \
+    MOSAIC_BOOTSTRAP_REF="$BOOTSTRAP_REF" \
+    MOSAIC_INSTALL_MODE="$INSTALL_MODE" \
+    MOSAIC_HOME="$MOSAIC_HOME" \
+    sh
+else
+  echo "[mosaic-release-upgrade] ERROR: curl or wget required." >&2
+  exit 1
+fi
+