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The Reasoning Engine validates LLM reasoning traces using chain-of-thought parsing and multi-provider verification.

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Features

  • Chain-of-Thought Validation - Parse and verify reasoning steps
  • Result Caching - LRU + Redis for repeated queries
  • Multi-Provider Support - Anthropic, Azure OpenAI, Google Gemini, OpenAI
  • Semantic Fact Extraction - Identify verifiable claims

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Usage

from qwed_sdk import QWEDClient

client = QWEDClient(api_key="qwed_...")

result = client.verify_reasoning(
    query="If all cats are mammals, and all mammals are animals, are all cats animals?",
    enable_caching=True
)

print(result.is_valid)     # True
print(result.confidence)   # 0.95
print(result.reasoning_trace)  # Step-by-step logic
print(result.cached)       # True/False

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Multi-Provider Verification

result = client.verify_reasoning(
    query="Complex reasoning task...",
    providers=["anthropic", "openai", "gemini", "azure"],
    enable_cross_validation=True
)

print(result.provider_agreement)  # 4/4
print(result.per_provider_results)

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Caching

The engine caches results to avoid redundant LLM calls: 
# First call - hits LLM
result1 = client.verify_reasoning(query, enable_caching=True)
print(result1.cached)  # False

# Second call - from cache
result2 = client.verify_reasoning(query, enable_caching=True)
print(result2.cached)  # True (instant!)

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Formula equivalence

When verifying whether two arithmetic formulas produce the same result, the engine uses a safe AST-based evaluator instead of Python’s eval(). The evaluator only allows basic arithmetic operators (+, -, *, /, **) and numeric literals — any other expression is rejected. This prevents code-injection risks while still supporting numeric fallback checks during reasoning validation.

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Chain-of-thought validation

cot_trace = """
Step 1: All cats are mammals (given)
Step 2: All mammals are animals (given)
Step 3: Therefore, all cats are animals (transitivity)
"""

result = client.validate_cot(
    trace=cot_trace,
    conclusion="All cats are animals"
)

print(result.valid_steps)    # [1, 2, 3]
print(result.invalid_steps)  # []
print(result.conclusion_valid)  # True