Build your own webhook transport
How to build a webhook registry and delivery system on Postgres using outbox rows, delivery attempts, signatures, retries, and inbound inbox rows.
The claim loop
Minimal Postgres claim loop: enqueue, SKIP LOCKED claim, complete, and handler retry with an interactive simulation.
Crash recovery
Leases, lease cleanup, at-least-once delivery, and handler idempotency for Postgres inbox workers.
Many workers
Multi-worker contention, delivery guarantees, and per-key ordering before consistent hash.
Partitioning at scale
Consistent hash, heartbeats, rebalance windows, and multi-worker simulation with ring ownership.
Production controls
Lease renewal, fencing, graceful drain, and housekeeping for Postgres-backed durable work after order:9182 ships.
Cross-service handoffs
Transactional outbox, transport choices, webhooks, contracts, and when brokers fit. Work that leaves your database commit.
Schema and operations
Full Postgres schema, inbox SQL, observability, testing, and schema evolution for order:9182.
Performance and scaling
Claim-path tuning, indexes, and an interactive performance tuner for Postgres claim loops.
Build a small durable workflow engine in Postgres
How to extend a Postgres durable queue into a simple durable workflow engine with workflow definitions, step scheduling, timers, signals, and versioning.