Two related fixes for the "switching agent mid-thread loses context"
issue:
1. LLM-context fix
The system prompt now includes a PRIOR HAND-OFF block whenever the
current conversation has been touched by more than one agent. It
lists the prior personas (name + role) and tells the new agent:
"Earlier turns were produced by other personas. Read them as
context, but answer in your own voice as the current persona."
Without this, switching from Atlas (Operator) to Pythia (Researcher)
left Pythia answering as if she'd produced Atlas's prior turns.
Tracked via two-trigger useEffect:
- On agent change with messages already in the thread, the prior
agent gets locked into history.
- On stream finish, the current active agent gets added (it just
produced a turn).
Cleared with the conversation.
2. UI-attribution fix
Each assistant turn now records which agent produced it
(messageAgents map: index -> Agent). The row signature in
MessageRow now reads that stamped agent rather than always echoing
the currently-active one. Switching agents mid-thread no longer
retroactively re-attributes prior responses.
Both maps are wiped by Clear conversation alongside the live snapshot
and initialLive ref, so a fresh thread starts truly fresh.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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