F on an ingot mold does nothing and says nothing

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/PROJECT_MAP.md

@@ -286,7 +286,7 @@ The vacuum, blowing grains out, grains in flight (flyers), and the flame tool. M
 - functions: vacuumTargetAt, toolVacuum, nozzle, toolBlow, flyOpen, depositNear, bagTemp, landFlyer, flyTick, toolIgnite
 - variables: blowRR, FLY_G, FLY_Q
 
-### src/sim/actions.js (86 lines)
+### src/sim/actions.js (87 lines)
 Player actions on built things: take back, place a machine or mold, gates, F to interact. Take back whatever piece is at (x,y): machine, mold or block. Returns a message.
 - functions: removePieceAt, removePieceAt0, placeMachineAt, placeMoldAt, toggleGateAt, interactAt
 

docs/agent-log.md

@@ -4,6 +4,17 @@ What agents have done, newest first. Add an entry for every piece of work: the d
 note or request it was for, what changed, the files touched, the tests run, and anything left
 open or not verified. Keep each entry short; the git history has the details.
 
+## 2026-10-23: F on an ingot mold does nothing and says nothing (Claude Code)
+
+Note: "now that ingot molds empty themselves, F still makes a message…"
+
+- `src/sim/actions.js` `interactAt` passes ingot molds by, so F reaches anything else nearby;
+  `src/ui/actions.js` shows no "Nothing to use there." when the cursor is on an ingot mold.
+- Tests: `t_molds` (F on an ingot mold in every state returns nothing, changes nothing, no
+  sound) and `play.py` (F over an ingot mold leaves no status and no toast). All 11 headless
+  suites and `play.py` pass.
+- Open: nothing.
+
 ## 2026-10-23: pixel-art silo for the pixel look (Claude Code, with Codex)
 
 Note: "the silo art looks the same for both pixelated graphiocs and smooth."