diff --git a/work-items/open/20260527-000019-workspace-memory-lint-cli/artifacts/.gitkeep b/work-items/closed/20260527-000019-workspace-memory-lint-cli/artifacts/.gitkeep
similarity index 100%
rename from work-items/open/20260527-000019-workspace-memory-lint-cli/artifacts/.gitkeep
rename to work-items/closed/20260527-000019-workspace-memory-lint-cli/artifacts/.gitkeep
diff --git a/work-items/open/20260527-000019-workspace-memory-lint-cli/item.md b/work-items/closed/20260527-000019-workspace-memory-lint-cli/item.md
similarity index 98%
rename from work-items/open/20260527-000019-workspace-memory-lint-cli/item.md
rename to work-items/closed/20260527-000019-workspace-memory-lint-cli/item.md
index 22accb64..6d23de75 100644
--- a/work-items/open/20260527-000019-workspace-memory-lint-cli/item.md
+++ b/work-items/closed/20260527-000019-workspace-memory-lint-cli/item.md
@@ -2,12 +2,12 @@
 id: 20260527-000019-workspace-memory-lint-cli
 slug: workspace-memory-lint-cli
 title: ワークスペースのメモリーをLintするヘッドレスCLI
-status: open
+status: closed
 kind: task
 priority: P2
 labels: [migrated, memory, cli]
 created_at: 2026-05-27T00:00:19Z
-updated_at: 2026-05-31T02:14:28Z
+updated_at: 2026-05-31T02:15:17Z
 assignee: null
 legacy_ticket: null
 ---
diff --git a/work-items/closed/20260527-000019-workspace-memory-lint-cli/resolution.md b/work-items/closed/20260527-000019-workspace-memory-lint-cli/resolution.md
new file mode 100644
index 00000000..9f56bab1
--- /dev/null
+++ b/work-items/closed/20260527-000019-workspace-memory-lint-cli/resolution.md
@@ -0,0 +1 @@
+Implemented `insomnia memory lint` as a headless command in the existing user-facing `insomnia` binary. The command lints workspace memory/knowledge records with the existing `memory::Linter` using `WriteMode::Update`, supports human and JSON output, handles warnings-as-errors, preserves `insomnia memory` as a positional Pod name, and returns before TUI/raw-terminal or Pod connection paths. External review approved and validation passed.
diff --git a/work-items/open/20260527-000019-workspace-memory-lint-cli/thread.md b/work-items/closed/20260527-000019-workspace-memory-lint-cli/thread.md
similarity index 79%
rename from work-items/open/20260527-000019-workspace-memory-lint-cli/thread.md
rename to work-items/closed/20260527-000019-workspace-memory-lint-cli/thread.md
index 36937ccc..83e8bf1a 100644
--- a/work-items/open/20260527-000019-workspace-memory-lint-cli/thread.md
+++ b/work-items/closed/20260527-000019-workspace-memory-lint-cli/thread.md
@@ -77,4 +77,29 @@ Non-blocking follow-ups:
 Validation adequacy: coder-reported validation is sufficient for this ticket. Reviewer additionally checked `git diff --check develop...HEAD` read-only.
 
 
+---
+
+<!-- event: implementation_report author: hare at: 2026-05-31T02:15:16Z -->
+
+## Implementation report
+
+Main workspace validation after merge:
+
+- `cargo fmt --check` passed
+- `cargo test -p tui memory_lint -- --nocapture` passed (10 passed)
+- `cargo test -p tui` passed (224 passed)
+- `cargo check -p tui` passed with pre-existing dead-code warnings in `llm-worker` and `tui`
+- `./tickets.sh doctor` passed
+- `git diff --check` passed
+
+
+---
+
+<!-- event: close author: hare at: 2026-05-31T02:15:17Z status: closed -->
+
+## Closed
+
+Implemented `insomnia memory lint` as a headless command in the existing user-facing `insomnia` binary. The command lints workspace memory/knowledge records with the existing `memory::Linter` using `WriteMode::Update`, supports human and JSON output, handles warnings-as-errors, preserves `insomnia memory` as a positional Pod name, and returns before TUI/raw-terminal or Pod connection paths. External review approved and validation passed.
+
+
 ---