diff --git a/docs/agent-log.md b/docs/agent-log.md
index 5b75494..153b480 100644
--- a/docs/agent-log.md
+++ b/docs/agent-log.md
@@ -4,6 +4,16 @@ 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.
 
+## 2026-10-27: t63 vacuum picks up grains in mid-air (Claude Code + Codex)
+
+- `toolVacuum` now takes flyers (grains a screw launches or that were blown out) inside its
+  brush and reach before loose cells, with the same pick filter, flask rule, bag-full stop and
+  48-grain budget. `vacuumTargetAt` also considers them. Rain is skipped: it belongs to the
+  clouds, and taking it would make water.
+- Files: `src/sim/vacuum.js`, `test/t_basics.js`. Built on a separate worktree branch in
+  parallel with t67 and fast-forwarded.
+- Tests: `python3 test/run_all.py --browser` all passed; new checks only in the determinism diff.
+
 ## 2026-10-27: t67 phase 1, shared join module (Claude Code + Codex)
 
 - Owner decision (DESIGN.md, replaces the t62 same-row rule): one join rule for every transport