Supplementary Materials for: LLM-Based Multi-Agent Orchestration: A Survey of Frameworks, Communication Protocols, and Emerging Patterns

Supplementary materials for the survey "LLM-Based Multi-Agent Orchestration: A Survey of Frameworks, Communication Protocols, and Emerging Patterns" (MDPI Future Internet, manuscript futureinternet-4320172). Version 2.0 (major-revision resubmission, 2026-05-30) adds the empirical artifacts: Study A (MAST-Data cross-framework analysis; extraction pipeline + per-trace/per-cell CSVs) and Study B (CrewAI cross-backend pipeline-portability harness; 108 live runs across DeepSeek-V4-Flash and Gemini-2.5-Flash), alongside the PRISMA screening/query logs, per-reference evidence-tier ratings, and the machine-readable orchestration decision framework. All numbers in Tables 4b1, A.2, and C.1 of the manuscript are recomputable from these files.