diff --git a/.gitignore b/.gitignore
index 737f215..007bfa0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,3 +56,7 @@ uploads/
 /server.pid
 .claude/settings.local.json
 .opencode/plugins/emdash-notifications.js
+
+### Windows / Runtime Artifacts
+*.stackdump
+NUL
diff --git a/bash.exe.stackdump b/bash.exe.stackdump
deleted file mode 100644
index 76862b8..0000000
--- a/bash.exe.stackdump
+++ /dev/null
@@ -1,29 +0,0 @@
-Stack trace:
-Frame         Function      Args
-0007FFFFB920  00021005FE8E (000210285F68, 00021026AB6E, 000000000000, 0007FFFFA820) msys-2.0.dll+0x1FE8E
-0007FFFFB920  0002100467F9 (000000000000, 000000000000, 000000000000, 0007FFFFBBF8) msys-2.0.dll+0x67F9
-0007FFFFB920  000210046832 (000210286019, 0007FFFFB7D8, 000000000000, 000000000000) msys-2.0.dll+0x6832
-0007FFFFB920  000210068CF6 (000000000000, 000000000000, 000000000000, 000000000000) msys-2.0.dll+0x28CF6
-0007FFFFB920  000210068E24 (0007FFFFB930, 000000000000, 000000000000, 000000000000) msys-2.0.dll+0x28E24
-0007FFFFBC00  00021006A225 (0007FFFFB930, 000000000000, 000000000000, 000000000000) msys-2.0.dll+0x2A225
-End of stack trace
-Loaded modules:
-000100400000 bash.exe
-7FF9B93D0000 ntdll.dll
-7FF9B79A0000 KERNEL32.DLL
-7FF9B6860000 KERNELBASE.dll
-7FF9B8740000 USER32.dll
-7FF9B6830000 win32u.dll
-7FF9B84F0000 GDI32.dll
-7FF9B6CD0000 gdi32full.dll
-7FF9B6790000 msvcp_win.dll
-000210040000 msys-2.0.dll
-7FF9B7000000 ucrtbase.dll
-7FF9B7370000 advapi32.dll
-7FF9B8E40000 msvcrt.dll
-7FF9B85B0000 sechost.dll
-7FF9B6FD0000 bcrypt.dll
-7FF9B90F0000 RPCRT4.dll
-7FF9B5F20000 CRYPTBASE.DLL
-7FF9B6710000 bcryptPrimitives.dll
-7FF9B86E0000 IMM32.DLL
diff --git a/openspec/changes/session-dedup-knowledge-map/.archive-ready b/openspec/changes/session-dedup-knowledge-map/.archive-ready
deleted file mode 100644
index e69de29..0000000