Concepts

Concept	Meaning
Claim	Named ownership lease
Generation	Process identity competing for claims
Fencing token	Monotonic token; stale owners rejected
Capability	Narrow, expiring authorization grant
Security epoch	Rotation that invalidates prior capabilities
Lockdown	Fail-closed emergency stop stronger than maintenance
Audit chain	Tamper-evident hash-linked records

Product standard: protect who may work, when, and how responsibility moves.