Flow Studio
HIL Guide Map
This overview is Guide 21. Three deeper guides cover the implementation mechanics, timeout enforcement, and multi-party approval in detail.
Related Guides
Guide 22: HIL Suspension and Resume
Deep dive into how the engine suspends execution, serialises state, generates correlation tokens, and resumes from a suspended node. Essential for engineers implementing custom HIL node types.
Guide 23: HIL Timeout
How the HILTimeoutJob detects expired suspensions, how escalation works, and how the timeout output port is configured and routed.
Guide 20: Multi-Party Approval
Configuring multiple approvers, approval strategies (Any / All / Quorum), per-actor decision tracking, and the approval audit trail.
Guide 31: Execution Memory
How ExecutionMemory is structured, serialised for HIL persistence, and restored on resume. Required reading for HIL node authors.
Learning Path
| Goal | Read |
|---|---|
| Understand HIL concepts | Guide 21 (this guide) |
| Build a custom HIL executor | Guide 21 → Guide 22 → Guide 31 |
| Configure multi-party approval | Guide 21 → Guide 20 |
| Debug a stuck HIL workflow | Guide 22 (failure modes page) → Guide 23 |
| Add timeout to existing HIL node | Guide 23 |