Observed Signal · Jul 6, 2026 · Technical Release · Source: DEV Community · Impact: 2/5 · Sentiment: Positive
AI research copilot detects when sources contradict
An engineer describes Crosscheck, an open-source "research copilot" built on top of cognee that provides persistent memory and a contradiction-detection engine. Instead of relying solely on a knowledge graph (which flattens numbers and merges entities), Crosscheck extracts faithful flat claims as (subject, predicate, object) tagged with source and timestamp. A two-stage pipeline — a structural pre-filter that groups claims and an LLM judge that confirms true contradictions — flags disagreements (e.g., 50k req/s vs 10k req/s). The author documents changes to make cognee work on a weak local model (llama3.1:8b via Ollama) by switching to the BAML parser, disabling fragile summarization, and turning off multi-user access control. The same contradictions engine was repurposed as Argus, a spend/contract leakage auditor; the project and demo data are available on GitHub.
Introduces an open-source contradiction-detection primitive that preserves numeric claims and works with local LLMs; useful for research workflows and finance-auditing use cases but not a major platform change.
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Key Takeaways & Evidence Grounding
- Crosscheck is a copilot built on top of cognee that provides persistent memory and contradiction detection across sources.
- Crosscheck extracts flat (subject, predicate, object) claims with verbatim numbers, source id and timestamp rather than relying solely on a knowledge graph.
- Contradiction detection uses a structural pre-filter (group by normalized subject+predicate) followed by an LLM judge that confirms contradictions.
- The system runs fully offline on Ollama (used with llama3.1:8b) after switching cognee to BAML, disabling chunk summarization, and turning off multi-user access control.
- The contradiction engine was reused to build Argus, a spend & contract leakage auditor, and the code is published to GitHub (CodeMuscle/crosscheck).
Connected Companies & Entities
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