External Execution Surface
Use the carrier-neutral activity-grade external execution contract for bounded tasks, bridges, and AI-operable handlers.
Invocable HTTP Carrier
Configure the activity-only invocable_http carrier so the server can POST a leased activity task to an HTTPS handler endpoint and reconcile the structured result.
PHP Invocable Activity Handler
Use the PHP InvocableActivityHandler helper to host activity handlers behind an HTTPS endpoint that receives external task input envelopes and returns result envelopes.
Worker Protocol
Implement the versioned worker-plane protocol for polling, leasing, history replay, heartbeats, completion, and external task results.
Avro Value protocol
Durable Workflow 2.0 uses one fixed recursive
Prerelease history migration
Use this offline procedure when an Avro-only Durable Workflow 2.0 deployment
Task Matching and Dispatch
Understand how Durable Workflow turns ready durable tasks into worker assignments, from long-poll wakeups to dedicated matching-role deployments.
Task Queue Admission
Tune worker slots, server-side queue budgets, and query-task backpressure for the standalone server.
Worker Build-Id Rollout
Roll out, canary, drain, and roll back worker builds without stranding executions using build-id rollout state on the standalone server.