"author:aurumflux20" matching MCP servers:

Stops agents double-firing side effects like double-charges or duplicate sends: same-instant races elect exactly one winner, and late duplicates get a sealed, content-addressed receipt replayed instead of a second execution. Tools: fence_prepare, fence_commit, fence_abort.

Exactly-once execution for irreversible agent actions: an agent claims the right to run an effect, and a retry after a lost response returns the sealed result instead of charging again. 12 tools over stdio, including a gateway mode where the agent holds a single-use ticket and never the provider key.