CFC: Evidence-Bound Closure Control for LLM Decisions — Technical Report v1.0

Technical report presenting CFC (Comparative Feedback Control), an experimental framework and deterministic control approach for preventing unsupported decision closure in LLM-based systems. The report describes the core control logic, frozen project components, evidence taxonomy, current validation status, open scientific questions, and the planned controlled A/B/C/D evaluation. CFC is presented as an experimental research prototype and proof of concept; independent external replication and confirmatory causal evaluation remain pending.