feat: add Mem0 plugin for Claude Code and Cursor (#4518)

mem0-plugin/scripts/block_memory_write.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# Hook: PreToolUse (matcher: Write|Edit)
+#
+# Blocks writes to MEMORY.md and auto-memory files, redirecting Claude
+# to use the mem0 MCP add_memory tool instead.
+#
+# Input:  JSON on stdin with tool_name, tool_input
+# Output: stderr message (exit 2 = block)
+#
+# Exit codes:
+#   0 = allow the tool call
+#   2 = block the tool call (stderr is shown to Claude as feedback)
+
+set -euo pipefail
+
+INPUT=$(cat)
+
+FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // .tool_input.path // ""' 2>/dev/null || echo "")
+
+if [ -z "$FILE_PATH" ]; then
+  exit 0
+fi
+
+case "$FILE_PATH" in
+  */MEMORY.md|*/memory/*.md|*/.claude/*/memory/*)
+    echo "BLOCKED: Do not write to $FILE_PATH. Use the mem0 MCP \`add_memory\` tool instead to persist memories. This project uses mem0 for all memory storage." >&2
+    exit 2
+    ;;
+  *)
+    exit 0
+    ;;
+esac