Antinomia is a Personal Tension Management (PTM) system — the in-tension counterpart of Personal Knowledge Management, focused not on explicit knowledge but on cognitive tensions: contradictions, tradeoffs, anomalies, persistent doubts, weak signals, and conflicts between goals. Distributed as a plugin for Obsidian, it organizes notes into five layers (tension, substrate, principle, defeated, meta_note) managed via YAML frontmatter, with an AI-powered Contradiction Hunter for identifying hidden contradictions across vault notes.