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fix(gateway): use filtered history length for transcript message extraction

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The transcript extraction used len(history) to find new messages, but
history includes session_meta entries that are stripped before passing
to the agent. This mismatch caused 1 message to be lost from the
transcript on every turn after the first, because the slice offset
was too high. Use the filtered history length (history_offset) returned
by _run_agent instead.

Also changed the else branch from returning all agent_messages to
returning an empty list, so compressed/shorter agent output does not
duplicate the entire history into the transcript.
This commit is contained in:
PercyDikec
2026-03-04 21:34:40 +03:00
parent 70a0a5ff4a
commit d3504f84af
2 changed files with 274 additions and 3 deletions
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10
gateway/run.py
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@@ -945,9 +945,12 @@ class GatewayRunner:
}
)
# Find only the NEW messages from this turn (skip history we loaded)
history_len = len(history)
new_messages = agent_messages[history_len:] if len(agent_messages) > history_len else agent_messages
# Find only the NEW messages from this turn (skip history we loaded).
# Use the filtered history length (history_offset) that was actually
# passed to the agent, not len(history) which includes session_meta
# entries that were stripped before the agent saw them.
history_len = agent_result.get("history_offset", len(history))
new_messages = agent_messages[history_len:] if len(agent_messages) > history_len else []
# If no new messages found (edge case), fall back to simple user/assistant
if not new_messages:
@@ -2070,6 +2073,7 @@ class GatewayRunner:
"messages": result_holder[0].get("messages", []) if result_holder[0] else [],
"api_calls": result_holder[0].get("api_calls", 0) if result_holder[0] else 0,
"tools": tools_holder[0] or [],
"history_offset": len(agent_history),
}
# Start progress message sender if enabled