refactor: consolidate agent/editor plugins under integrations/ (#5491)

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

integrations/mem0-plugin/scripts/on_file_read.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+# Hook: PreToolUse (matcher: Read)
+#
+# Injects prior work context before Claude reads a file. Searches mem0
+# for memories referencing the file path and returns a compact timeline.
+#
+# Modeled after claude-mem's file-context handler, adapted for mem0 cloud API.
+#
+# Input:  JSON on stdin with tool_name, tool_input (file_path), cwd
+# Output: JSON with hookSpecificOutput.additionalContext + permissionDecision
+#
+# Must never block the Read — silent exit on any failure.
+
+set -uo pipefail
+
+INPUT=$(cat)
+
+# Extract file path from tool_input
+FILE_PATH=$(echo "$INPUT" | jq -r '.tool_input.file_path // ""' 2>/dev/null || echo "")
+if [ -z "$FILE_PATH" ]; then
+  exit 0
+fi
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+# Resolve API key (covers Desktop app users who set it in shell profile)
+if [ -z "${MEM0_API_KEY:-}" ]; then
+  . "$SCRIPT_DIR/_identity.sh" 2>/dev/null || true
+fi
+if [ -z "${MEM0_API_KEY:-}" ]; then
+  exit 0
+fi
+CWD=$(echo "$INPUT" | jq -r '.cwd // "."' 2>/dev/null || echo ".")
+
+# Call the Python worker — it handles gating (file size, existence)
+TIMELINE=$(python3 "$SCRIPT_DIR/file_context.py" "$FILE_PATH" "$CWD" 2>/dev/null || echo "")
+
+if [ -z "$TIMELINE" ]; then
+  exit 0
+fi
+
+# Return context injection with permissionDecision: allow
+jq -cn --arg ctx "$TIMELINE" '{
+  hookSpecificOutput: {
+    hookEventName: "PreToolUse",
+    additionalContext: $ctx,
+    permissionDecision: "allow"
+  }
+}' 2>/dev/null || true
+
+exit 0