Symptom: paliadin chat returns "Verbindung verloren" because aichat's
paliadin persona is not configured with streaming support — every
RunTurnStream() call gets back HTTP 400 unsupported_streaming and the
SSE stream closes empty.
Fix: when RunTurnStream() detects "unsupported_streaming" in the
upstream error, transparently retry against /chat/turn (non-streaming)
with the same body. The full response gets emitted as a single
StreamChunk + StreamMeta so the SSE relay sees identical event
ordering. Persistence (completeTurn + markPrimed) mirrors the one-shot
RunTurn() path.
No real-time chunking until the persona is reconfigured upstream, but
the chat works end-to-end. Once the paliadin persona supports streaming
on aichat, this code path goes dormant — the unsupported_streaming
branch is only entered when the upstream actually returns that error.
Diagnostic logs from commit 937ff13 made this visible:
paliadin: backend returned error err=aichat: HTTP 400 (bad_request):
unsupported_streaming: persona paliadin does not support streaming
Refs m/paliad demo path.
mAi
3af71e772b