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Use BufferSlot as single source of truth for handler dispatch

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Handlers now receive payload references directly from the context
buffer slot rather than independent copies. Metadata is derived
via slot_to_handler_metadata() ensuring consistency.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
dullfig 2026-01-10 17:51:38 -08:00
parent f195835bea
commit 379f5a0258
1 changed files with 20 additions and 10 deletions
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30
agentserver/message_bus/stream_pump.py
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@ -381,9 +381,11 @@ class StreamPump:
# === CONTEXT BUFFER: Record incoming message ===
# Append validated payload to thread's context buffer
# The returned BufferSlot becomes the single source of truth
slot = None
if current_thread and state.payload:
try:
context_buffer.append(
slot = context_buffer.append(
thread_id=current_thread,
payload=state.payload,
from_id=state.from_id or "unknown",
@ -400,16 +402,24 @@ class StreamPump:
f"Thread {current_thread[:8]}... exceeded context buffer limit"
)
metadata = HandlerMetadata(
thread_id=current_thread,
from_id=state.from_id or "",
own_name=listener.name if listener.is_agent else None,
is_self_call=is_self_call,
usage_instructions=listener.usage_instructions,
todo_nudge=todo_nudge,
)
# Derive metadata from slot (single source of truth)
# Fall back to manual construction if no slot (e.g., buffer overflow)
if slot:
from agentserver.memory import slot_to_handler_metadata
metadata = slot_to_handler_metadata(slot)
payload_ref = slot.payload # Same reference as in buffer
else:
metadata = HandlerMetadata(
thread_id=current_thread,
from_id=state.from_id or "",
own_name=listener.name if listener.is_agent else None,
is_self_call=is_self_call,
usage_instructions=listener.usage_instructions,
todo_nudge=todo_nudge,
)
payload_ref = state.payload
response = await listener.handler(state.payload, metadata)
response = await listener.handler(payload_ref, metadata)
# None means "no response needed" - don't re-inject
if response is None: