adding ollama installer

scripts/bootstrap_ollama_mac.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+echo "🔧 Ollama macOS bootstrap — starting"
+
+# Load environment (MODEL_ROOT, OLLAMA_MODELS)
+# Temporarily disable "nounset" when sourcing user shell files to avoid
+# failures from system /etc/bashrc referencing undefined vars like PS1.
+if [ -f "$HOME/.bashrc" ]; then
+  set +u
+  # shellcheck disable=SC1091
+  source "$HOME/.bashrc" || true
+  set -u
+fi
+
+: "${OLLAMA_MODELS:=$HOME/models/ollama}"
+mkdir -p "$OLLAMA_MODELS"
+
+if command -v ollama >/dev/null 2>&1; then
+  echo "✅ ollama already installed: $(ollama version 2>/dev/null || echo 'unknown')"
+else
+  if command -v brew >/dev/null 2>&1; then
+    echo "🍺 Installing ollama via Homebrew..."
+    brew update || true
+    brew install ollama || {
+      echo "⚠️  Homebrew install failed. See https://ollama.com/docs/install"
+      exit 1
+    }
+    echo "✅ ollama installed"
+  else
+    echo "⚠️  Homebrew not found. Install Homebrew first: https://brew.sh"
+    echo "Then re-run this script: $0"
+    exit 2
+  fi
+fi
+
+echo "📁 Ensuring model directory exists: $OLLAMA_MODELS"
+mkdir -p "$OLLAMA_MODELS"
+
+echo "✅ macOS Ollama bootstrap complete."
+echo "Next steps: run scripts/ollama_tmux.sh to start the server in tmux, and place models under $OLLAMA_MODELS"