Mark Backman 989fb4deaa Fix context summarization failing with mid-conversation system messages ...

Only treat messages[0] as the initial system prompt when determining the
summarization range. Previously, the code scanned the entire context for
the first system-role message, which caused failures when the only system
message was a mid-conversation injection (e.g. "The user has been quiet").
In that case summary_start exceeded summary_end, producing an empty range
and "No messages to summarize" errors.

Fixes #4286

2026-04-14 11:48:50 -04:00

51 KiB

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