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93bcb0a649
Root cause: when consolidation LLM fails, raw_archive() dumped full message content (~1MB) into history.jsonl with no size limit. Since build_system_prompt() injects history.jsonl into every system prompt, all subsequent LLM calls exceeded the 200K context window with error 1261. Additionally, _cap_consolidation_boundary's 60-message cap caused consolidation to get stuck on sessions with long tool chains (200+ iterations), triggering the raw_archive fallback in the first place. Three-layer fix: - Remove _cap_consolidation_boundary: let pick_consolidation_boundary drive chunk sizing based solely on token budget - Truncate archive() input: use tiktoken to cap formatted text to the model's input token budget before sending to consolidation LLM - Truncate raw_archive() output: cap history.jsonl entries at 16K chars
233 lines
9.7 KiB
Python
233 lines
9.7 KiB
Python
"""Tests for the lightweight Consolidator — append-only to HISTORY.md."""
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import pytest
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import asyncio
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from unittest.mock import AsyncMock, MagicMock, patch
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from nanobot.agent.memory import Consolidator, MemoryStore, _RAW_ARCHIVE_MAX_CHARS
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@pytest.fixture
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def store(tmp_path):
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return MemoryStore(tmp_path)
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@pytest.fixture
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def mock_provider():
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p = MagicMock()
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p.chat_with_retry = AsyncMock()
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return p
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@pytest.fixture
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def consolidator(store, mock_provider):
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sessions = MagicMock()
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sessions.save = MagicMock()
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return Consolidator(
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store=store,
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provider=mock_provider,
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model="test-model",
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sessions=sessions,
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context_window_tokens=1000,
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build_messages=MagicMock(return_value=[]),
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get_tool_definitions=MagicMock(return_value=[]),
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max_completion_tokens=100,
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)
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class TestConsolidatorSummarize:
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async def test_summarize_appends_to_history(self, consolidator, mock_provider, store):
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"""Consolidator should call LLM to summarize, then append to HISTORY.md."""
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mock_provider.chat_with_retry.return_value = MagicMock(
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content="User fixed a bug in the auth module."
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)
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messages = [
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{"role": "user", "content": "fix the auth bug"},
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{"role": "assistant", "content": "Done, fixed the race condition."},
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]
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result = await consolidator.archive(messages)
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assert result == "User fixed a bug in the auth module."
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entries = store.read_unprocessed_history(since_cursor=0)
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assert len(entries) == 1
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async def test_summarize_raw_dumps_on_llm_failure(self, consolidator, mock_provider, store):
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"""On LLM failure, raw-dump messages to HISTORY.md."""
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mock_provider.chat_with_retry.side_effect = Exception("API error")
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messages = [{"role": "user", "content": "hello"}]
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result = await consolidator.archive(messages)
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assert result is None # no summary on raw dump fallback
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entries = store.read_unprocessed_history(since_cursor=0)
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assert len(entries) == 1
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assert "[RAW]" in entries[0]["content"]
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async def test_summarize_skips_empty_messages(self, consolidator):
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result = await consolidator.archive([])
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assert result is None
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class TestConsolidatorArchiveErrorHandling:
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"""archive() must fall back to raw_archive when the LLM returns an error
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response (finish_reason == 'error'), e.g. overloaded / quota exceeded.
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See https://github.com/HKUDS/nanobot/issues/3244
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"""
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async def test_archive_falls_back_on_error_finish_reason(self, consolidator, mock_provider, store):
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"""LLM returning finish_reason='error' should trigger raw_archive, not write error text."""
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mock_provider.chat_with_retry.return_value = MagicMock(
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content="Error: {'type': 'error', 'error': {'type': 'overloaded_error', 'message': 'overloaded_error (529)'}}",
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finish_reason="error",
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)
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messages = [
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{"role": "user", "content": "fix the auth bug"},
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{"role": "assistant", "content": "Done, fixed the race condition."},
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]
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result = await consolidator.archive(messages)
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assert result is None
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entries = store.read_unprocessed_history(since_cursor=0)
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assert len(entries) == 1
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assert "[RAW]" in entries[0]["content"]
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assert "Error:" not in entries[0]["content"]
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async def test_archive_preserves_summary_on_success(self, consolidator, mock_provider, store):
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"""Normal LLM response should still produce a proper summary entry."""
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mock_provider.chat_with_retry.return_value = MagicMock(
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content="User fixed a bug in the auth module.",
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finish_reason="stop",
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)
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messages = [
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{"role": "user", "content": "fix the auth bug"},
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{"role": "assistant", "content": "Done."},
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]
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result = await consolidator.archive(messages)
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assert result == "User fixed a bug in the auth module."
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entries = store.read_unprocessed_history(since_cursor=0)
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assert len(entries) == 1
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assert "[RAW]" not in entries[0]["content"]
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class TestConsolidatorTokenBudget:
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async def test_prompt_below_threshold_does_not_consolidate(self, consolidator):
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"""No consolidation when tokens are within budget."""
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session = MagicMock()
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session.last_consolidated = 0
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session.messages = [{"role": "user", "content": "hi"}]
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session.key = "test:key"
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consolidator.estimate_session_prompt_tokens = MagicMock(return_value=(100, "tiktoken"))
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consolidator.archive = AsyncMock(return_value=True)
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await consolidator.maybe_consolidate_by_tokens(session)
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consolidator.archive.assert_not_called()
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async def test_large_chunk_archived_without_cap(self, consolidator):
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"""Without chunk cap, the full range from pick_consolidation_boundary is archived."""
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consolidator._SAFETY_BUFFER = 0
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session = MagicMock()
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session.last_consolidated = 0
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session.key = "test:key"
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session.messages = [
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{
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"role": "user" if i in {0, 50, 61} else "assistant",
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"content": f"m{i}",
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}
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for i in range(70)
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]
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consolidator.estimate_session_prompt_tokens = MagicMock(
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side_effect=[(1200, "tiktoken"), (400, "tiktoken")]
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)
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# Use real pick_consolidation_boundary — it will find boundary at idx=50
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# (user message at 50, token budget met)
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consolidator.archive = AsyncMock(return_value=True)
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await consolidator.maybe_consolidate_by_tokens(session)
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archived_chunk = consolidator.archive.await_args.args[0]
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# pick_consolidation_boundary returns (50, tokens) — user turn at idx 50
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assert archived_chunk[0]["content"] == "m0"
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assert session.last_consolidated > 0
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async def test_boundary_respected_when_no_intermediate_user_turn(self, consolidator):
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"""When boundary points past a long tool chain, the full chunk is archived."""
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consolidator._SAFETY_BUFFER = 0
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session = MagicMock()
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session.last_consolidated = 0
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session.key = "test:key"
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session.messages = [
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{
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"role": "user" if i in {0, 61} else "assistant",
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"content": f"m{i}",
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}
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for i in range(70)
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]
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consolidator.estimate_session_prompt_tokens = MagicMock(
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side_effect=[(1200, "tiktoken"), (400, "tiktoken")]
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)
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consolidator.archive = AsyncMock(return_value=True)
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await consolidator.maybe_consolidate_by_tokens(session)
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consolidator.archive.assert_awaited_once()
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# pick_consolidation_boundary finds the only boundary at idx=61
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assert session.last_consolidated == 61
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class TestRawArchiveTruncation:
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"""raw_archive() must cap entry size to avoid bloating history.jsonl."""
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def test_raw_archive_truncates_large_content(self, store):
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"""Large messages should be truncated to _RAW_ARCHIVE_MAX_CHARS."""
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big = "x" * 50_000
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messages = [{"role": "user", "content": big}]
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store.raw_archive(messages)
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entries = store.read_unprocessed_history(since_cursor=0)
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assert len(entries) == 1
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assert len(entries[0]["content"]) < 50_000
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assert "[RAW]" in entries[0]["content"]
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def test_raw_archive_preserves_small_content(self, store):
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"""Small messages should not be truncated."""
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messages = [{"role": "user", "content": "hello"}]
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store.raw_archive(messages)
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entries = store.read_unprocessed_history(since_cursor=0)
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assert len(entries) == 1
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assert "hello" in entries[0]["content"]
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def test_raw_archive_custom_max_chars(self, store):
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"""max_chars parameter should override default limit."""
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messages = [{"role": "user", "content": "a" * 200}]
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store.raw_archive(messages, max_chars=100)
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entries = store.read_unprocessed_history(since_cursor=0)
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assert len(entries[0]["content"]) < 200
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class TestArchiveTruncation:
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"""archive() must truncate formatted text before sending to consolidation LLM."""
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async def test_archive_truncates_large_formatted_text(self, consolidator, mock_provider, store):
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"""Large formatted text should be truncated to token budget before LLM call."""
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# context_window_tokens=1000, max_completion_tokens=100, _SAFETY_BUFFER=1024
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# budget = 1000 - 100 - 1024 = -124 → fallback via truncate_text(budget*4)
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big_messages = [{"role": "user", "content": "x" * 100_000}]
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mock_provider.chat_with_retry.return_value = MagicMock(
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content="Summary of large input.", finish_reason="stop"
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)
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await consolidator.archive(big_messages)
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call_args = mock_provider.chat_with_retry.call_args
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user_content = call_args.kwargs["messages"][1]["content"]
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# Should be significantly shorter than 100K
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assert len(user_content) < 50_000
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async def test_archive_truncates_with_small_token_budget(self, consolidator, mock_provider, store):
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"""Small context window: truncation uses actual tokenizer count."""
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consolidator.context_window_tokens = 500
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big_messages = [{"role": "user", "content": "word " * 50_000}]
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mock_provider.chat_with_retry.return_value = MagicMock(
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content="Summary.", finish_reason="stop"
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)
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await consolidator.archive(big_messages)
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sent_messages = mock_provider.chat_with_retry.call_args.kwargs["messages"]
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user_content = sent_messages[1]["content"]
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# budget = 500 - 100 - 1024 = negative, fallback char-based
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# Should be truncated
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assert len(user_content) < 250_000
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