Prevent infinite loops

[g3Bg2]

When the edge is connected circularly there is no end to loops. It becomes infinite loop.

To Reproduce

Steps to reproduce the behavior:

1. Click on any node.
2. Connect the edge to parent node.
3. Infinite loop

Expected behavior

When running the tree which has infinite loop. The workflow should n't be executed and warn the user to check for infinite loop.

[g3Bg2]

Thanks for reporting this! Infinite loop detection is something we definitely need before v1.0 — a circular edge connection right now will hang the workflow with no escape.

The fix would involve running a cycle-detection check (e.g., DFS-based) on the graph before execution starts, and if a cycle is found, blocking execution and surfacing a clear warning to the user.

This is labeled good first issue — if anyone wants to take a stab at it, the relevant logic would live in the execution engine. Happy to provide more pointers!