diff --git a/CLAUDE/notes/history.md b/CLAUDE/notes/history.md
index 2f0a89f..489e71b 100644
--- a/CLAUDE/notes/history.md
+++ b/CLAUDE/notes/history.md
@@ -229,10 +229,19 @@
 - Added 4 tests (1 property): i32.rem_u, 8KB round-trip, 5 duplicate sends, combined lifecycle fuzz
 - All 216 tests pass
 
+## Cycles 51-57 — Continued Coverage Expansion
+- Cycle 51 (220): XOR transform, address reconstruction, double+watch, constructors
+- Cycle 52 (224): shift ops, AND/OR, echo+double coexist, i16 load
+- Cycle 53 (228): repeated build independence, stale memory read, guest module fuzz, 3-deep calls
+- Cycle 54 (232): grow+send from new page, 20×20 stress (400 msgs), minimal module, data segment template
+- Cycle 55 (236): raw inbox send, multi data segments, 100 ticks, nop instructions
+- Cycle 56 (240): interleaved spawn, store16, min/max via select, runtime drop with live actors
+- Cycle 57 (244): immutable global, 5 round-trips, builder ownership, empty tick ordering
+
 ## Campaign Summary (ongoing)
-- **55 commits** on bin-runner branch (3 bug fixes + 52 test commits)
-- **216 tests** (198 scenario + 14 property + 4 compile-time checks)
+- **62 commits** on bin-runner branch (3 bug fixes + 59 test commits)
+- **244 tests** (225 scenario + 15 property + 4 compile-time checks)
 - **3 bugs found and fixed** in core WASM actor code and runtime
 - **2 flaky MT tests fixed** with retry polling
-- **7,645 lines** of test code
+- **~8,500 lines** of test code
 - Implementation proved extremely robust after initial 3 bug fixes