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SDK

Get Started

🪓 What is Hatchet?Quickstart Using Coding Agents

Local Development

Running Hatchet Locally Embedded Mode

Core Concepts

Tasks Workers Running Tasks Durable Execution

Triggers

Scheduled Runs Cron Runs Bulk Triggering Events Webhooks Inter-Service Triggering

Reliability

Retry Policies Timeouts Cancellation Pausing Workflows Bulk Retries & Cancellations

Flow Control

Concurrency Rate Limits Priority Idempotency Batch Tasks CEL Expressions

Durable Execution

Durable Tasks Child Spawning Sleeps Event Waits Task Eviction DAGs as Durable Workflows

Workers

Running with Docker Autoscaling Workers

Advanced Assignment

Sticky Assignment Worker Affinity Task Slot Cost Manual Slot Release

Observability

Logging OpenTelemetry Worker Health Checks Prometheus Metrics Additional Metadata

Operations

Middleware Streaming Environments

Custom plans

SSO User Roles User Groups

Evaluating Hatchet?

Architecture & Guarantees Cloud vs OSS

Region Availability Uptime Developer Experience

Migration Guides

From Celery to Hatchet From Temporal to Hatchet

Troubleshooting

Frequently Asked Questions

Add to Cursor Add to Claude Copy for LLM View as MD

Advanced Assignment

Fine-tune how tasks are assigned to workers.

Sticky Assignment — Pin tasks to specific workers
Worker Affinity — Prefer specific workers
Task Slot Cost — Set how many worker slots a task consumes
Manual Slot Release — Control when slots free up

Last updated on October 8, 2026

Autoscaling Workers

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Sticky Assignment

Sticky assignment pins every child task of a workflow run to the worker that ran the parent, so expensive local state can be reused across tasks.

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Advanced Assignment