fencing-token

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

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.

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

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

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