EDGE_MISANCHORED
EDGE_MISANCHORED is a structural error: an edge, message, or dependency references an endpoint that is not in the diagram.
What triggers it. A gantt after dependency naming a missing task, a sequence message whose participant was removed, or edges left dangling after a remove_node mutation.
How to fix it. Add the missing endpoint (add_node, add_participant, add_task) or retarget/remove the dangling edge (remove_edge, remove_message).
See it fire
This minimal source triggers EDGE_MISANCHORED — checked at build time against the same engine the editor runs.
gantt
dateFormat YYYY-MM-DD
section Build
Design :design, 2026-01-01, 2d
Ship :ship, after review, 3d
Open in the editor and watch it clear
Run am verify diagram.mmd --json, inspect this code, and apply the smallest source or typed mutation that clears it. If it persists after two mechanical attempts, return the warning and ask for human review.
In the cloned repo, am is bun run bin/am.ts.
Back to all warning codes, or open the editor to watch this warning clear as you edit.