diff --git a/work-items/open/20260527-000021-bash-tool-editing-guidance/artifacts/.gitkeep b/work-items/closed/20260527-000021-bash-tool-editing-guidance/artifacts/.gitkeep
similarity index 100%
rename from work-items/open/20260527-000021-bash-tool-editing-guidance/artifacts/.gitkeep
rename to work-items/closed/20260527-000021-bash-tool-editing-guidance/artifacts/.gitkeep
diff --git a/work-items/open/20260527-000021-bash-tool-editing-guidance/item.md b/work-items/closed/20260527-000021-bash-tool-editing-guidance/item.md
similarity index 93%
rename from work-items/open/20260527-000021-bash-tool-editing-guidance/item.md
rename to work-items/closed/20260527-000021-bash-tool-editing-guidance/item.md
index 6798a8ba..43948964 100644
--- a/work-items/open/20260527-000021-bash-tool-editing-guidance/item.md
+++ b/work-items/closed/20260527-000021-bash-tool-editing-guidance/item.md
@@ -2,12 +2,12 @@
 id: 20260527-000021-bash-tool-editing-guidance
 slug: bash-tool-editing-guidance
 title: Bashツールがファイル編集に常用されている問題をdesciptionで抑制
-status: open
+status: closed
 kind: task
 priority: P2
 labels: [migrated]
 created_at: 2026-05-27T00:00:21Z
-updated_at: 2026-05-27T00:00:21Z
+updated_at: 2026-05-31T22:36:34Z
 assignee: null
 legacy_ticket: null
 ---
diff --git a/work-items/closed/20260527-000021-bash-tool-editing-guidance/resolution.md b/work-items/closed/20260527-000021-bash-tool-editing-guidance/resolution.md
new file mode 100644
index 00000000..5f653ba4
--- /dev/null
+++ b/work-items/closed/20260527-000021-bash-tool-editing-guidance/resolution.md
@@ -0,0 +1 @@
+Closed without implementation for now. Current Bash tool description already nudges agents toward Read/Edit/Glob/Grep over shell-based file edits, and this is not urgent enough to carry as an active work item. If the behavior becomes a recurring problem, reopen as a focused prompt-description polish ticket covering Bash child processes such as cat/tee/sed/perl/python rewrites.
diff --git a/work-items/closed/20260527-000021-bash-tool-editing-guidance/thread.md b/work-items/closed/20260527-000021-bash-tool-editing-guidance/thread.md
new file mode 100644
index 00000000..6927d3e7
--- /dev/null
+++ b/work-items/closed/20260527-000021-bash-tool-editing-guidance/thread.md
@@ -0,0 +1,16 @@
+<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:21Z -->
+
+## Migrated
+
+Migrated from TODO.md entry without a legacy ticket file. No legacy review file was present at migration time.
+
+---
+
+<!-- event: close author: hare at: 2026-05-31T22:36:34Z status: closed -->
+
+## Closed
+
+Closed without implementation for now. Current Bash tool description already nudges agents toward Read/Edit/Glob/Grep over shell-based file edits, and this is not urgent enough to carry as an active work item. If the behavior becomes a recurring problem, reopen as a focused prompt-description polish ticket covering Bash child processes such as cat/tee/sed/perl/python rewrites.
+
+
+---
diff --git a/work-items/open/20260527-000021-bash-tool-editing-guidance/thread.md b/work-items/open/20260527-000021-bash-tool-editing-guidance/thread.md
deleted file mode 100644
index f43b546f..00000000
--- a/work-items/open/20260527-000021-bash-tool-editing-guidance/thread.md
+++ /dev/null
@@ -1,7 +0,0 @@
-<!-- event: migration author: tickets.sh-migration at: 2026-05-27T00:00:21Z -->
-
-## Migrated
-
-Migrated from TODO.md entry without a legacy ticket file. No legacy review file was present at migration time.
-
----