fencing-token

Distributed process supervisor and coordination wrapper (leader election, semaphores, cron) built on etcd v3 for zero-dependency Linux process orchestration.

Cross-process mutual exclusion for iOS App Group containers, built on a lease plus a fencing token — because a suspended process is not a dead one.

Exactly-once processing for at-least-once Google Cloud Pub/Sub — a tiny Python idempotency gateway for Cloud Functions & Cloud Run push handlers. Leases, fencing tokens; Datastore/Redis/SQL backends.

Interactive demo for FencedLease: watch a suspended iOS process resume and get fenced out by the peer that took over. Consumes the library as a remote Swift package.

Fencing tokens and leases for agent locks, so two agents cannot both believe they hold one

SQLite state management for AI agent leases, fencing tokens, durable checkpoints, and workflow audit events.

Generic idempotency for Node.js — execute any operation exactly once per key, with pluggable storage, explicit concurrency semantics, and first-class observability.

Fenced distributed leases with explicit ownership and native Valkey and PostgreSQL adapters.