From 86801e8adfd88a131cd17565274ad752b7106a0e Mon Sep 17 00:00:00 2001
From: Bruno Postle <bruno@postle.net>
Date: Fri, 20 Mar 2026 18:54:16 +0000
Subject: [PATCH] Document assign_product vs assign_process for construction
 tasks

---
 CLAUDE.md | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/CLAUDE.md b/CLAUDE.md
index 5d211c0..7bd160f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -452,8 +452,11 @@ ifc_edit("sequence.add_task", '{"work_schedule": "<sched_id>", "name": "Foundati
 # Leaf tasks
 ifc_edit("sequence.add_task", '{"parent_task": "<phase_id>", "name": "Install Ground Beams", "identification": "P1.1", "predefined_type": "CONSTRUCTION"}')
 
-# Assign physical elements to tasks
-ifc_edit("sequence.assign_process", '{"relating_process": "<task_id>", "related_object": "<element_id>"}')
+# Assign physical elements to tasks as OUTPUTS (things being constructed/produced)
+# CRITICAL: use assign_product NOT assign_process for construction tasks.
+# assign_process = input (material consumed/demolished) → Bonsai animator crashes on CONSTRUCTION type
+# assign_product = output (element produced) → correct for all CONSTRUCTION tasks
+ifc_edit("sequence.assign_product", '{"relating_product": "<element_id>", "related_object": "<task_id>"}')
 
 # Sequence relationships between phases/tasks
 ifc_edit("sequence.assign_sequence", '{"relating_process": "<pred_id>", "related_process": "<succ_id>", "sequence_type": "FINISH_START"}')