@techreport{agentrust2026durableshutdownblocks,
  title = {When an Agent Kill Switch Trips: Durable blocks, linked refusals and work already in flight at a tool gateway},
  author = {Imran Siddique},
  institution = {AgenTrust},
  year = {2026},
  type = {Technical report},
  note = {Version 1; not peer reviewed},
  doi = {10.5281/zenodo.23091298},
  url = {https://agentrust-io.com/research/durable-shutdown-blocks/v1/}
}