diff --git a/CLAUDE.md b/CLAUDE.md
index f30b452..15089e0 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -72,6 +72,7 @@ Key modules:
 - `solver.py` — bottom-up ratio solve (scipy)
 - `fitness.py` — native Python fitness evaluator (replaces Perl oracle)
 - `fitness_cmd.py` — `homemaker-fitness` CLI entry point
+- `collapse_cmd.py` — `homemaker-collapse` CLI: finish-time global cell→room collapse (94g)
 - `graph.py` — leaf-adjacency graph for programme-driven fitness checks
 - `genome.py` — topology genome: base-floor tree + per-storey deltas
 - `operators.py` — high-locality mutation and subtree crossover
diff --git a/README.md b/README.md
index d45bcbe..ec268b5 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@ search then only explores topology + types + adjacency.
 - `src/homemaker_layout/solver.py` — bottom-up ratio solve (scipy).
 - `src/homemaker_layout/fitness.py` — native Python fitness evaluator.
 - `src/homemaker_layout/fitness_cmd.py` — `homemaker-fitness` CLI (drop-in for `urb-fitness.pl`).
+- `src/homemaker_layout/collapse_cmd.py` — `homemaker-collapse` CLI: finish-time global cell→room relabel of a `.dom`.
 - `src/homemaker_layout/graph.py` — leaf-adjacency graph for programme-driven checks.
 - `src/homemaker_layout/genome.py` — topology genome: base-floor tree + per-storey deltas.
 - `src/homemaker_layout/operators.py` — high-locality mutation and subtree crossover.