Part V: Closure — Fungi and the Recycling Fiber
The η-sector: structure recycling, decomposition, nutrient cycling. The closure/recycler sector operates on the recycling channel of the metabolic fiber T². Fungi—mycelial networks that decompose organic matter and return nutrients to the biosphere—are the biological archetype. Death and aging complete the closure loop; ecosystems weave all sectors into inter-sector webs via symbiosis and Nash equilibria; healing and regeneration reverse entropy locally within the finite repair budget of mortal carriers.