Reliability3 min read
Idempotency for Workflow Side Effects: Prevent Double Charges and Duplicate Sends
A practical failure model for payments, emails, and API calls that may succeed just before a worker crashes.
Read the field guide →Engineering field guides
Debug the failure path before production does.
Concrete decision tables, recovery protocols, and operator checklists drawn from recurring developer incidents—not generic orchestration advice.
Operations3 min read
Why a Workflow Is Stuck in Running: A Worker-Polling Diagnostic Checklist
Trace a stuck workflow from queue assignment to worker lease, heartbeat, external call, and completion acknowledgement.
Read the field guide →Architecture4 min read
Cron vs Job Queue vs Durable Workflow Engine: Choose the Smallest Tool That Works
A decision matrix for scheduled scripts, background jobs, and multi-step work that must survive failures and long waits.
Read the field guide →Architecture4 min read
State Snapshots vs Event Replay for Durable Workflows
Compare two recovery models by failure behavior, migration burden, storage shape, and operator experience.
Read the field guide →Reliability4 min read
Exactly-Once Workflow Execution: What the Guarantee Really Means
Separate durable state transitions from at-least-once delivery and external side effects.
Read the field guide →Operations4 min read
How to Deploy While Long-Running Workflows Are Active
A deployment playbook for version coexistence, worker draining, leases, and rollback.
Read the field guide →Observability4 min read
Background Job Observability: Metrics That Find Silent Failures
Instrument queue age, polling, leases, retries, and business outcomes instead of watching error count alone.
Read the field guide →AI Agents5 min read
Running AI Agents in Production Without Losing Control
Design agent loops around durable steps, bounded tools, approvals, budgets, and replayable evidence.
Read the field guide →AI Agents4 min read
How to Stream LLM Output Without Corrupting Workflow State
Keep low-latency token delivery separate from durable model-call and tool-call boundaries.
Read the field guide →Architecture4 min read
Human-in-the-Loop Workflow Architecture for Safe Approvals
Model approval as a durable, authorized state transition with deadlines and an audit trail.
Read the field guide →Operations5 min read
Self-Hosted Workflow Engine Operations Checklist
Prepare storage, backups, upgrades, capacity, security, observability, and recovery before production.
Read the field guide →Architecture4 min read
Versioning Workflows That Run for Weeks
Keep old runs safe while definitions, workers, payloads, and databases evolve.
Read the field guide →Mobile4 min read
Offline Durable Workflows on iOS and Android
Coordinate local intent, OS background limits, sync, deduplication, and server-side durable execution.
Read the field guide →Strategy5 min read
Build vs Buy a Workflow Orchestrator: A Practical Decision Model
Count recovery semantics, operations, migrations, and lock-in—not only the first implementation sprint.
Read the field guide →