fencing-token

Distributed leader election for .NET on HashiCorp Consul. Leases carry a fencing token and signal loss through a CancellationToken — because a distributed lock alone does not give you mutual exclusion.

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.

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.

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

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

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.

Idempotent Stripe fulfilment: leased, fenced order claims that survive retries, crashes and concurrent webhook deliveries. 59 tests, no network needed.

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.