diff --git a/.yoi/tickets/00001KX7Z3WE6/item.md b/.yoi/tickets/00001KX7Z3WE6/item.md
index 66c79193..8b96ed13 100644
--- a/.yoi/tickets/00001KX7Z3WE6/item.md
+++ b/.yoi/tickets/00001KX7Z3WE6/item.md
@@ -1,8 +1,8 @@
 ---
 title: 'Disable Console links for archived Workers'
-state: 'inprogress'
+state: 'done'
 created_at: '2026-07-11T06:51:23Z'
-updated_at: '2026-07-11T06:52:17Z'
+updated_at: '2026-07-11T07:01:17Z'
 assignee: null
 queued_by: 'yoi ticket'
 queued_at: '2026-07-11T06:52:17Z'
diff --git a/.yoi/tickets/00001KX7Z3WE6/thread.md b/.yoi/tickets/00001KX7Z3WE6/thread.md
index c9a99f57..f9ba66ed 100644
--- a/.yoi/tickets/00001KX7Z3WE6/thread.md
+++ b/.yoi/tickets/00001KX7Z3WE6/thread.md
@@ -39,4 +39,33 @@ Ticket を `yoi ticket` が queued にしました。
 State changed to `inprogress`.
 
 
+---
+
+<!-- event: implementation_report author: hare at: 2026-07-11T07:01:17Z -->
+
+## Implementation report
+
+Archived registry-only Workers no longer render as Console links.
+
+- Added shared `canOpenWorkerConsole` helper that rejects `state: archived` and `implementation.kind: backend_worker_registry`.
+- Sidebar renders archived Workers as disabled readonly rows instead of anchors.
+- Workers page shows `Archived` instead of `Open Console` for archived Workers.
+- Added unit coverage for live vs archived Console availability.
+
+Validation:
+- cd web/workspace && deno task check
+- cd web/workspace && deno task test
+- git diff --check
+- nix build .#yoi --no-link
+
+
+---
+
+<!-- event: state_changed author: "yoi ticket" at: 2026-07-11T07:01:17Z from: inprogress to: done reason: cli_state field: state -->
+
+## State changed
+
+State changed to `done`.
+
+
 ---
diff --git a/web/workspace/deno.json b/web/workspace/deno.json
index aa67cda9..bec65306 100644
--- a/web/workspace/deno.json
+++ b/web/workspace/deno.json
@@ -6,7 +6,7 @@
     "dev": "deno run -A npm:vite@7.2.7 dev",
     "dev:backend": "cd ../.. && cargo run -p yoi-workspace-server -- serve --workspace . --db .yoi/workspace.db --listen 127.0.0.1:8787",
     "check": "deno run -A npm:@sveltejs/kit@2.49.4 sync && deno run -A npm:svelte-check@4.3.4 --tsconfig ./tsconfig.json",
-    "test": "deno test --allow-read=src --allow-env=VSCODE_TEXTMATE_DEBUG src/lib/workspace-api/http.test.ts src/lib/workspace-console/markdown.test.ts src/lib/workspace-console/model.test.ts src/lib/workspace-console/worker-console.ui.test.ts src/lib/workspace-settings/model.test.ts src/lib/workspace-sidebar/worker-launch.test.ts src/lib/workspace-sidebar/repository-nav.test.ts",
+    "test": "deno test --allow-read=src --allow-env=VSCODE_TEXTMATE_DEBUG src/lib/workspace-api/http.test.ts src/lib/workspace-console/markdown.test.ts src/lib/workspace-console/model.test.ts src/lib/workspace-console/worker-console.ui.test.ts src/lib/workspace-settings/model.test.ts src/lib/workspace-sidebar/workers.test.ts src/lib/workspace-sidebar/worker-launch.test.ts src/lib/workspace-sidebar/repository-nav.test.ts",
     "build": "deno run -A npm:vite@7.2.7 build",
     "preview": "deno run -A npm:vite@7.2.7 preview"
   },
diff --git a/web/workspace/src/app.css b/web/workspace/src/app.css
index 562eaeb1..03028145 100644
--- a/web/workspace/src/app.css
+++ b/web/workspace/src/app.css
@@ -436,6 +436,15 @@
         gap: 2px;
     }
 
+    .worker-nav-item.disabled {
+        cursor: default;
+        opacity: 0.62;
+    }
+
+    .worker-nav-item.disabled .item-title {
+        color: var(--text-muted);
+    }
+
     .worker-title-row {
         display: grid;
         grid-template-columns: minmax(0, max-content) minmax(0, 1fr);
diff --git a/web/workspace/src/lib/workspace-console/worker-console.ui.test.ts b/web/workspace/src/lib/workspace-console/worker-console.ui.test.ts
index 292c0667..c7cd3ed4 100644
--- a/web/workspace/src/lib/workspace-console/worker-console.ui.test.ts
+++ b/web/workspace/src/lib/workspace-console/worker-console.ui.test.ts
@@ -14,7 +14,10 @@ Deno.test("workspace Worker list lives on the dedicated Workers page", async ()
     new URL("./../../routes/w/[workspaceId]/+page.svelte", import.meta.url),
   );
   const workersPage = await Deno.readTextFile(
-    new URL("./../../routes/w/[workspaceId]/workers/+page.svelte", import.meta.url),
+    new URL(
+      "./../../routes/w/[workspaceId]/workers/+page.svelte",
+      import.meta.url,
+    ),
   );
   const workersNav = await Deno.readTextFile(
     new URL("../workspace-sidebar/WorkersNavSection.svelte", import.meta.url),
@@ -24,8 +27,8 @@ Deno.test("workspace Worker list lives on the dedicated Workers page", async ()
   );
 
   assert(
-    workspacePage.includes('href={`/w/${workspaceId}/runtimes`}') &&
-      workspacePage.includes('href={`/w/${workspaceId}/workers`}'),
+    workspacePage.includes("href={`/w/${workspaceId}/runtimes`}") &&
+      workspacePage.includes("href={`/w/${workspaceId}/workers`}"),
     "top workspace page should link to Runtimes and Workers pages",
   );
   assert(
@@ -35,15 +38,15 @@ Deno.test("workspace Worker list lives on the dedicated Workers page", async ()
   );
   assert(
     workersPage.includes("workerConsoleHref(worker, data.workspaceId)") &&
-      workersPage.includes("<table class=\"workers-table\">") &&
+      workersPage.includes('<table class="workers-table">') &&
       workersPage.includes("Open Console"),
     "dedicated Workers page should expose a table and attach action per Worker",
   );
   assert(
-    workersNav.includes('href={`/w/${workspaceId}/workers`}') &&
-      workersNav.includes("workerConsoleHref(worker, workspaceId)") &&
-      workersNav.includes("aria-current"),
-    "Workers sidebar should link to the Worker list page and target Console routes",
+    workersNav.includes("href={`/w/${workspaceId}/workers`}") &&
+      workersNav.includes("canOpenWorkerConsole(worker)") &&
+      workersNav.includes('aria-disabled="true"'),
+    "Workers sidebar should link to the Worker list page and render archived Workers as disabled rows",
   );
   assert(
     !sidebar.includes("CompanionNavSection") &&
@@ -54,12 +57,17 @@ Deno.test("workspace Worker list lives on the dedicated Workers page", async ()
 
 Deno.test("Worker Console uses protocol observation events without transcript fetch", async () => {
   const consolePage = await Deno.readTextFile(
-    new URL("./../../routes/w/[workspaceId]/runtimes/[runtimeId]/workers/[workerId]/console/+page.svelte", import.meta.url),
+    new URL(
+      "./../../routes/w/[workspaceId]/runtimes/[runtimeId]/workers/[workerId]/console/+page.svelte",
+      import.meta.url,
+    ),
   );
 
   assert(
     consolePage.includes("seenObservationEventIds") &&
-      consolePage.includes("rememberObservationEvent(frame.envelope.event_id)") &&
+      consolePage.includes(
+        "rememberObservationEvent(frame.envelope.event_id)",
+      ) &&
       consolePage.includes("projectConsole(observedEvents.map") &&
       !consolePage.includes("/transcript") &&
       !consolePage.includes("WorkerTranscriptProjection"),
@@ -69,7 +77,10 @@ Deno.test("Worker Console uses protocol observation events without transcript fe
 
 Deno.test("Decodal source editor keeps imperative EditorView out of reactive state", async () => {
   const editor = await Deno.readTextFile(
-    new URL("../workspace-settings/DecodalSourceEditor.svelte", import.meta.url),
+    new URL(
+      "../workspace-settings/DecodalSourceEditor.svelte",
+      import.meta.url,
+    ),
   );
 
   assert(
@@ -89,18 +100,27 @@ Deno.test("workspace Runtime management pages expose Runtimes and Runtime-owned
     new URL("../workspace-sidebar/RuntimesNavSection.svelte", import.meta.url),
   );
   const runtimesPage = await Deno.readTextFile(
-    new URL("./../../routes/w/[workspaceId]/runtimes/+page.svelte", import.meta.url),
+    new URL(
+      "./../../routes/w/[workspaceId]/runtimes/+page.svelte",
+      import.meta.url,
+    ),
   );
   const workdirsPage = await Deno.readTextFile(
-    new URL("./../../routes/w/[workspaceId]/runtimes/[runtimeId]/workdirs/+page.svelte", import.meta.url),
+    new URL(
+      "./../../routes/w/[workspaceId]/runtimes/[runtimeId]/workdirs/+page.svelte",
+      import.meta.url,
+    ),
   );
   const workdirsLoad = await Deno.readTextFile(
-    new URL("./../../routes/w/[workspaceId]/runtimes/[runtimeId]/workdirs/+page.ts", import.meta.url),
+    new URL(
+      "./../../routes/w/[workspaceId]/runtimes/[runtimeId]/workdirs/+page.ts",
+      import.meta.url,
+    ),
   );
 
   assert(
     sidebar.includes("RuntimesNavSection") &&
-      runtimesNav.includes('href={runtimesHref}') &&
+      runtimesNav.includes("href={runtimesHref}") &&
       runtimesNav.includes("/runtimes"),
     "sidebar should expose Runtime management navigation",
   );
@@ -123,18 +143,21 @@ Deno.test("workspace Worker sidebar links New to the dedicated create page", asy
     new URL("../workspace-sidebar/WorkersNavSection.svelte", import.meta.url),
   );
   const newWorkerPage = await Deno.readTextFile(
-    new URL("./../../routes/w/[workspaceId]/workers/new/+page.svelte", import.meta.url),
+    new URL(
+      "./../../routes/w/[workspaceId]/workers/new/+page.svelte",
+      import.meta.url,
+    ),
   );
 
   assert(
-    workersNav.includes('href={`/w/${workspaceId}/workers/new`}') &&
-      !workersNav.includes('worker-launch-form') &&
-      !workersNav.includes('createWorker()'),
+    workersNav.includes("href={`/w/${workspaceId}/workers/new`}") &&
+      !workersNav.includes("worker-launch-form") &&
+      !workersNav.includes("createWorker()"),
     "Workers sidebar should link to the dedicated New Worker page instead of owning the form",
   );
   assert(
-    newWorkerPage.includes('worker-launch-form') &&
-      newWorkerPage.includes('buildBrowserCreateWorkerRequest') &&
+    newWorkerPage.includes("worker-launch-form") &&
+      newWorkerPage.includes("buildBrowserCreateWorkerRequest") &&
       newWorkerPage.includes("/workers/launch-options"),
     "New Worker page should own launch options and creation form behavior",
   );
diff --git a/web/workspace/src/lib/workspace-sidebar/WorkersNavSection.svelte b/web/workspace/src/lib/workspace-sidebar/WorkersNavSection.svelte
index 4cdbc4b3..1bb89c7c 100644
--- a/web/workspace/src/lib/workspace-sidebar/WorkersNavSection.svelte
+++ b/web/workspace/src/lib/workspace-sidebar/WorkersNavSection.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import { workspaceApiPath } from '$lib/workspace-api/http';
   import { workerConsoleHref } from '$lib/workspace-console/model';
+  import { canOpenWorkerConsole } from './workers';
   import type { ListResponse, Worker } from './types';
 
   const MAX_VISIBLE_WORKERS = 6;
@@ -99,17 +100,31 @@
     <ul class="nav-list" aria-label="Workers">
       {#each workers as worker (`${worker.runtime_id}:${worker.worker_id}`)}
         {@const href = workerConsoleHref(worker, workspaceId)}
+        {@const consoleAvailable = canOpenWorkerConsole(worker)}
         <li>
-          <a href={href} class="nav-item worker-nav-item" class:active={currentPath === href} aria-current={currentPath === href ? 'page' : undefined}>
-            <span class="worker-title-row">
-              <span class="item-title">{worker.label}</span>
-              <span class="worker-task-title">-</span>
-            </span>
-            <span class="item-meta">
-              {worker.role ? `${worker.role} · ` : ''}{worker.state} · 🖥 {worker.host_id}
-              {worker.working_directory ? ` · wd:${worker.working_directory.repository_id}@${worker.working_directory.resolved_commit.slice(0, 8)}` : ''}
-            </span>
-          </a>
+          {#if consoleAvailable}
+            <a href={href} class="nav-item worker-nav-item" class:active={currentPath === href} aria-current={currentPath === href ? 'page' : undefined}>
+              <span class="worker-title-row">
+                <span class="item-title">{worker.label}</span>
+                <span class="worker-task-title">-</span>
+              </span>
+              <span class="item-meta">
+                {worker.role ? `${worker.role} · ` : ''}{worker.state} · 🖥 {worker.host_id}
+                {worker.working_directory ? ` · wd:${worker.working_directory.repository_id}@${worker.working_directory.resolved_commit.slice(0, 8)}` : ''}
+              </span>
+            </a>
+          {:else}
+            <div class="nav-item worker-nav-item disabled" aria-disabled="true">
+              <span class="worker-title-row">
+                <span class="item-title">{worker.label}</span>
+                <span class="worker-task-title">archived</span>
+              </span>
+              <span class="item-meta">
+                {worker.role ? `${worker.role} · ` : ''}{worker.state} · 🖥 {worker.host_id}
+                {worker.working_directory ? ` · wd:${worker.working_directory.repository_id}@${worker.working_directory.resolved_commit.slice(0, 8)}` : ''}
+              </span>
+            </div>
+          {/if}
         </li>
       {/each}
     </ul>
diff --git a/web/workspace/src/lib/workspace-sidebar/workers.test.ts b/web/workspace/src/lib/workspace-sidebar/workers.test.ts
new file mode 100644
index 00000000..d7b07cd4
--- /dev/null
+++ b/web/workspace/src/lib/workspace-sidebar/workers.test.ts
@@ -0,0 +1,62 @@
+import { canOpenWorkerConsole } from "./workers.ts";
+import type { Worker } from "./types.ts";
+
+declare const Deno: {
+  test(name: string, fn: () => void | Promise<void>): void;
+};
+
+function assertEquals<T>(actual: T, expected: T): void {
+  if (actual !== expected) {
+    throw new Error(`expected ${String(expected)}, got ${String(actual)}`);
+  }
+}
+
+function worker(overrides: Partial<Worker>): Worker {
+  return {
+    runtime_id: "arc",
+    worker_id: "worker-1",
+    host_id: "host",
+    label: "worker-1",
+    role: null,
+    profile: null,
+    workspace: { visibility: "workspace", identity: "workspace" },
+    state: "running",
+    pinned: false,
+    retention_state: "normal",
+    last_seen_at: null,
+    implementation: {
+      kind: "runtime_worker",
+      display_hint: "Runtime Worker",
+    },
+    capabilities: {
+      can_accept_input: true,
+      can_stop: true,
+      can_spawn_followup: false,
+    },
+    working_directory: null,
+    diagnostics: [],
+    ...overrides,
+  };
+}
+
+Deno.test("canOpenWorkerConsole rejects archived registry-only workers", () => {
+  assertEquals(
+    canOpenWorkerConsole(worker({
+      state: "archived",
+      implementation: {
+        kind: "backend_worker_registry",
+        display_hint: "Archived Worker",
+      },
+      capabilities: {
+        can_accept_input: false,
+        can_stop: false,
+        can_spawn_followup: false,
+      },
+    })),
+    false,
+  );
+});
+
+Deno.test("canOpenWorkerConsole accepts live runtime workers", () => {
+  assertEquals(canOpenWorkerConsole(worker({ state: "running" })), true);
+});
diff --git a/web/workspace/src/lib/workspace-sidebar/workers.ts b/web/workspace/src/lib/workspace-sidebar/workers.ts
new file mode 100644
index 00000000..79fadda5
--- /dev/null
+++ b/web/workspace/src/lib/workspace-sidebar/workers.ts
@@ -0,0 +1,6 @@
+import type { Worker } from "./types";
+
+export function canOpenWorkerConsole(worker: Worker): boolean {
+  return worker.state !== "archived" &&
+    worker.implementation.kind !== "backend_worker_registry";
+}
diff --git a/web/workspace/src/routes/w/[workspaceId]/workers/+page.svelte b/web/workspace/src/routes/w/[workspaceId]/workers/+page.svelte
index 5dcd970e..3580cc67 100644
--- a/web/workspace/src/routes/w/[workspaceId]/workers/+page.svelte
+++ b/web/workspace/src/routes/w/[workspaceId]/workers/+page.svelte
@@ -1,6 +1,7 @@
 <script lang="ts">
   import { workspaceApiPath } from '$lib/workspace-api/http';
   import { workerConsoleHref } from '$lib/workspace-console/model';
+  import { canOpenWorkerConsole } from '$lib/workspace-sidebar/workers';
   import type { Worker } from '$lib/workspace-sidebar/types';
   import type { PageProps } from './$types';
 
@@ -91,7 +92,11 @@
               <td><span class="pill {worker.pinned ? 'success' : 'muted'}">{worker.retention_state ?? 'normal'}</span></td>
               <td>{workerDirectory(worker)}</td>
               <td>
-                <a class="inline-link" href={workerConsoleHref(worker, data.workspaceId)}>Open Console</a>
+                {#if canOpenWorkerConsole(worker)}
+                  <a class="inline-link" href={workerConsoleHref(worker, data.workspaceId)}>Open Console</a>
+                {:else}
+                  <span class="muted" aria-disabled="true">Archived</span>
+                {/if}
                 <button type="button" onclick={() => setPinned(worker, !worker.pinned)}>
                   {worker.pinned ? 'Unpin' : 'Pin'}
                 </button>