feat: add LLM_OUTPUT=/dev/stdout to all tools/agents bashscripts (#123)

tools/execute_sql_code.sh

@@ -4,9 +4,11 @@ set -e
 # @describe Execute the sql code.
 # @option --code! The code to execute.
 
-# @env USQL_DSN! The database url, e.g. pgsql://user:pass@host/dbname
 # @meta require-tools usql
 
+# @env USQL_DSN! The database url, e.g. pgsql://user:pass@host/dbname
+# @env LLM_OUTPUT=/dev/stdout The output path
+
 main() {
     if ! grep -qi '^select' <<<"$argc_code"; then
         if [ -t 1 ]; then