Brydon DeWitt 3738732156 docs(agents): document Jinja system-message constraint and session-start delivery
- Add forbidden pattern: using experimental.chat.system.transform for
  session-start injection causes Jinja 'System message must be at the
  beginning' on Qwen-family GGUF models when orchestrator spawns subagents
- Add note to session-start.sh section explaining OpenCode delivery via
  output.parts.unshift() on first chat.message turn (not system.transform)
2026-05-23 00:00:40 -04:00
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