diff --git a/.yoi/tickets/00001KVMTV80T/item.md b/.yoi/tickets/00001KVMTV80T/item.md
index d2a4cc2a..4e372571 100644
--- a/.yoi/tickets/00001KVMTV80T/item.md
+++ b/.yoi/tickets/00001KVMTV80T/item.md
@@ -1,8 +1,8 @@
 ---
 title: 'Workspace server binary and CLI launcher'
-state: 'inprogress'
+state: 'closed'
 created_at: '2026-06-21T10:15:30Z'
-updated_at: '2026-06-21T10:16:04Z'
+updated_at: '2026-06-21T10:41:20Z'
 assignee: null
 queued_by: 'yoi ticket'
 queued_at: '2026-06-21T10:16:04Z'
diff --git a/.yoi/tickets/00001KVMTV80T/resolution.md b/.yoi/tickets/00001KVMTV80T/resolution.md
new file mode 100644
index 00000000..e008c241
--- /dev/null
+++ b/.yoi/tickets/00001KVMTV80T/resolution.md
@@ -0,0 +1 @@
+Added standalone yoi-workspace-server binary entrypoint with serve command and options for workspace/db/frontend/listen. Added yoi workspace serve launcher that resolves an external executable via YOI_WORKSPACE_SERVER_COMMAND or sibling yoi-workspace-server without linking the workspace-server crate into yoi. Updated package.nix to build/install both separate binaries. Validation passed: cargo fmt --check; cargo check -p yoi -p yoi-workspace-server; cargo test -p yoi workspace; cargo test -p yoi-workspace-server; cargo build -p yoi -p yoi-workspace-server; help/launch smoke tests; cargo tree dependency check; git diff --check; yoi ticket doctor; yoi objective doctor; nix build .#yoi --no-link.
diff --git a/.yoi/tickets/00001KVMTV80T/thread.md b/.yoi/tickets/00001KVMTV80T/thread.md
index c78378e3..bbe11925 100644
--- a/.yoi/tickets/00001KVMTV80T/thread.md
+++ b/.yoi/tickets/00001KVMTV80T/thread.md
@@ -41,3 +41,29 @@ State changed to `inprogress`.
 
 ---
 
+<!-- event: state_changed author: "yoi ticket" at: 2026-06-21T10:41:20Z from: inprogress to: done reason: cli_state field: state -->
+
+## State changed
+
+State changed to `done`.
+
+
+---
+
+<!-- event: state_changed author: hare at: 2026-06-21T10:41:20Z from: done to: closed reason: closed field: state -->
+
+## State changed
+
+Ticket を closed にしました。
+
+
+---
+
+<!-- event: close author: hare at: 2026-06-21T10:41:20Z status: closed -->
+
+## 完了
+
+Added standalone yoi-workspace-server binary entrypoint with serve command and options for workspace/db/frontend/listen. Added yoi workspace serve launcher that resolves an external executable via YOI_WORKSPACE_SERVER_COMMAND or sibling yoi-workspace-server without linking the workspace-server crate into yoi. Updated package.nix to build/install both separate binaries. Validation passed: cargo fmt --check; cargo check -p yoi -p yoi-workspace-server; cargo test -p yoi workspace; cargo test -p yoi-workspace-server; cargo build -p yoi -p yoi-workspace-server; help/launch smoke tests; cargo tree dependency check; git diff --check; yoi ticket doctor; yoi objective doctor; nix build .#yoi --no-link.
+
+
+---