The inFence state machine was dropping all lines between fence
delimiters, not just the delimiters themselves. Tool output, assistant
code blocks — everything inside fences was being eaten.
Fix: remove only [[[...]]] marker lines and bare fence delimiter lines
(``` / ```lang). Preserve all content between them.
When a streaming chunk contains only markers/fences, stripMarkers
returns empty bytes. The 9P server interprets a zero-length Rread as
EOF, closing the client's FD.
Fix: loop in streamAgentChatText, advancing the offset past
marker-only chunks until real content arrives.
Ollie Agent