implement first draft of sprockets

test-sprocket-example.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# Example sprocket script that demonstrates event processing
+# This script reads JSON events from stdin and outputs JSONL responses
+
+# Read events from stdin line by line
+while IFS= read -r line; do
+    # Parse the event JSON
+    event_id=$(echo "$line" | jq -r '.id')
+    event_kind=$(echo "$line" | jq -r '.kind')
+    event_content=$(echo "$line" | jq -r '.content')
+    
+    # Example policy: reject events with certain content
+    if [[ "$event_content" == *"spam"* ]]; then
+        echo "{\"id\":\"$event_id\",\"action\":\"reject\",\"msg\":\"content contains spam\"}"
+        continue
+    fi
+    
+    # Example policy: shadow reject events from certain kinds
+    if [[ "$event_kind" == "9999" ]]; then
+        echo "{\"id\":\"$event_id\",\"action\":\"shadowReject\",\"msg\":\"\"}"
+        continue
+    fi
+    
+    # Default: accept the event
+    echo "{\"id\":\"$event_id\",\"action\":\"accept\",\"msg\":\"\"}"
+    
+done