feat: Add Sweep prediction hook for Claude Code

- post-edit-sweep.js hook runs after Edit/Write operations
- Tracks recent diffs and runs background predictions
- Shows prediction hints in Claude Code
- install-sweep-hook.sh for easy installation

Author: jonathanpeterwu

scripts/install-sweep-hook.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+# Install Sweep prediction hook for Claude Code
+
+set -e
+
+HOOK_DIR="$HOME/.claude/hooks"
+SWEEP_DIR="$HOME/.stackmemory/sweep"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_DIR="$(dirname "$SCRIPT_DIR")"
+
+echo "Installing Sweep prediction hook for Claude Code..."
+
+# Create directories
+mkdir -p "$HOOK_DIR"
+mkdir -p "$SWEEP_DIR"
+
+# Copy hook script
+cp "$REPO_DIR/templates/claude-hooks/post-edit-sweep.js" "$HOOK_DIR/"
+chmod +x "$HOOK_DIR/post-edit-sweep.js"
+
+# Copy Python prediction script
+cp "$REPO_DIR/packages/sweep-addon/python/sweep_predict.py" "$SWEEP_DIR/"
+
+# Update hooks.json if it exists, otherwise create it
+HOOKS_JSON="$HOME/.claude/hooks.json"
+if [ -f "$HOOKS_JSON" ]; then
+    # Check if post-tool-use already configured
+    if grep -q "post-tool-use" "$HOOKS_JSON"; then
+        echo "Note: post-tool-use hook already configured in $HOOKS_JSON"
+        echo "You may need to manually add the sweep hook."
+    else
+        echo "Adding sweep hook to $HOOKS_JSON..."
+        # Use node to safely update JSON
+        node -e "
+const fs = require('fs');
+const hooks = JSON.parse(fs.readFileSync('$HOOKS_JSON', 'utf-8'));
+hooks['post-tool-use'] = '$HOOK_DIR/post-edit-sweep.js';
+fs.writeFileSync('$HOOKS_JSON', JSON.stringify(hooks, null, 2));
+console.log('Updated hooks.json');
+"
+    fi
+else
+    echo "Creating $HOOKS_JSON..."
+    cat > "$HOOKS_JSON" << 'EOF'
+{
+  "post-tool-use": "~/.claude/hooks/post-edit-sweep.js"
+}
+EOF
+fi
+
+# Check Python dependencies
+echo ""
+echo "Checking Python dependencies..."
+if python3 -c "import llama_cpp" 2>/dev/null; then
+    echo "  llama-cpp-python: installed"
+else
+    echo "  llama-cpp-python: NOT INSTALLED"
+    echo "  Run: pip install llama-cpp-python"
+fi
+
+if python3 -c "import huggingface_hub" 2>/dev/null; then
+    echo "  huggingface_hub: installed"
+else
+    echo "  huggingface_hub: NOT INSTALLED"
+    echo "  Run: pip install huggingface_hub"
+fi
+
+# Check model
+MODEL_PATH="$HOME/.stackmemory/models/sweep/sweep-next-edit-1.5b.q8_0.v2.gguf"
+if [ -f "$MODEL_PATH" ]; then
+    echo "  Model: downloaded"
+else
+    echo "  Model: NOT DOWNLOADED"
+    echo "  Run: stackmemory sweep setup --download"
+fi
+
+echo ""
+echo "Installation complete!"
+echo ""
+echo "Hook installed at: $HOOK_DIR/post-edit-sweep.js"
+echo "Python script at: $SWEEP_DIR/sweep_predict.py"
+echo ""
+echo "Usage:"
+echo "  - Hook runs automatically after Edit/Write operations"
+echo "  - Predictions appear after 2+ edits in session"
+echo "  - Check status: node $HOOK_DIR/post-edit-sweep.js --status"
+echo "  - Clear state: node $HOOK_DIR/post-edit-sweep.js --clear"
+echo "  - Disable: export SWEEP_ENABLED=false"
+echo ""