diff --git a/web/workspace/src/lib/generated/workspace-api.ts b/web/workspace/src/lib/generated/workspace-api.ts
index 12d78f3f..7c3c42db 100644
--- a/web/workspace/src/lib/generated/workspace-api.ts
+++ b/web/workspace/src/lib/generated/workspace-api.ts
@@ -474,6 +474,30 @@ export type RuntimeTrustKeyRevealResponse = { public_key: string };
 
 export type RevokeRuntimeTrustKeyRequest = { expected_revision: number };
 
+export type RemoveRuntimeRequest = {
+  operation_id: string;
+  expected_binding_revision: number;
+};
+
+export type RuntimeRemovalOperationState =
+  | "pending"
+  | "cleanup_pending"
+  | "succeeded"
+  | "failed";
+
+export type RuntimeRemovalOperationResponse = {
+  operation_id: string;
+  workspace_id: string;
+  runtime_id: string;
+  state: RuntimeRemovalOperationState;
+  binding_removed: boolean;
+  runtime_registration_removed: boolean | null;
+  failure_category?: string | null;
+  created_at: string;
+  updated_at: string;
+  completed_at?: string | null;
+};
+
 export type RuntimeTrustConflictKind = "stale_revision" | "fingerprint_in_use";
 
 export type RuntimeTrustConflictResponse = {
diff --git a/web/workspace/src/lib/workspace/api/runtime-management.ts b/web/workspace/src/lib/workspace/api/runtime-management.ts
index 6ed93eb8..00fe6470 100644
--- a/web/workspace/src/lib/workspace/api/runtime-management.ts
+++ b/web/workspace/src/lib/workspace/api/runtime-management.ts
@@ -1,10 +1,13 @@
 import type {
   CreateRemoteRuntimeRequest,
   Diagnostic,
+  RemoveRuntimeRequest,
   RevokeRuntimeTrustKeyRequest,
   RuntimeConnectionDisplayState,
   RuntimeIdentityAuthority,
   RuntimeManagementSummary,
+  RuntimeRemovalOperationResponse,
+  RuntimeRemovalOperationState,
   RuntimeSourceKind,
   RuntimeSourceStatus,
   RuntimeSourceSummary,
@@ -83,6 +86,12 @@ const CONNECTION_STATES = new Set<RuntimeConnectionDisplayState>([
   "unavailable",
   "revoked",
 ]);
+const REMOVAL_OPERATION_STATES = new Set<RuntimeRemovalOperationState>([
+  "pending",
+  "cleanup_pending",
+  "succeeded",
+  "failed",
+]);
 
 const encoder = new TextEncoder();
 type JsonObject = Record<string, unknown>;
@@ -770,6 +779,83 @@ export function parseRuntimeTrustConflict(
   };
 }
 
+export function parseRuntimeRemovalOperationResponse(
+  value: unknown,
+): RuntimeRemovalOperationResponse {
+  const response = object(value, "Runtime removal response");
+  exactKeys(
+    response,
+    [
+      "operation_id",
+      "workspace_id",
+      "runtime_id",
+      "state",
+      "binding_removed",
+      "runtime_registration_removed",
+      "created_at",
+      "updated_at",
+    ],
+    ["failure_category", "completed_at"],
+    "Runtime removal response",
+  );
+  const runtimeRegistrationRemoved = response.runtime_registration_removed;
+  if (
+    runtimeRegistrationRemoved !== null &&
+    typeof runtimeRegistrationRemoved !== "boolean"
+  ) {
+    return fail(
+      "Runtime removal response.runtime_registration_removed",
+      "must be a boolean or null",
+    );
+  }
+  return {
+    operation_id: boundedString(
+      response.operation_id,
+      "Runtime removal response.operation_id",
+      LIMITS.idBytes,
+    ),
+    workspace_id: boundedString(
+      response.workspace_id,
+      "Runtime removal response.workspace_id",
+      LIMITS.idBytes,
+    ),
+    runtime_id: boundedString(
+      response.runtime_id,
+      "Runtime removal response.runtime_id",
+      LIMITS.idBytes,
+    ),
+    state: enumValue(
+      response.state,
+      "Runtime removal response.state",
+      REMOVAL_OPERATION_STATES,
+    ),
+    binding_removed: boolean(
+      response.binding_removed,
+      "Runtime removal response.binding_removed",
+    ),
+    runtime_registration_removed: runtimeRegistrationRemoved,
+    failure_category: optionalNullableString(
+      response.failure_category,
+      "Runtime removal response.failure_category",
+      LIMITS.diagnosticCodeBytes,
+    ),
+    created_at: boundedString(
+      response.created_at,
+      "Runtime removal response.created_at",
+      LIMITS.timestampBytes,
+    ),
+    updated_at: boundedString(
+      response.updated_at,
+      "Runtime removal response.updated_at",
+      LIMITS.timestampBytes,
+    ),
+    completed_at: optionalNullableTimestamp(
+      response.completed_at,
+      "Runtime removal response.completed_at",
+    ),
+  };
+}
+
 function revisionForJson(revision: number | null): number | null {
   if (revision === null) return null;
   if (!Number.isSafeInteger(revision) || revision < 1) {
@@ -940,28 +1026,51 @@ export async function updateRemoteRuntime(
   return finishMutation(response, workspaceId, runtimeId);
 }
 
-export async function deleteRemoteRuntime(
+export async function removeRemoteRuntime(
   workspaceId: string,
   runtimeId: string,
+  request: RemoveRuntimeRequest,
   fetchImpl: typeof fetch = fetch,
-): Promise<void> {
+): Promise<RuntimeRemovalOperationResponse> {
   const response = await fetchImpl(
     workspaceApiPath(
       workspaceId,
       `/runtimes/${encodeURIComponent(runtimeId)}`,
     ),
-    { method: "DELETE" },
+    {
+      method: "DELETE",
+      headers: { "content-type": "application/json" },
+      body: JSON.stringify(request),
+    },
   );
-  if (response.ok) return;
   let payload: unknown;
   try {
     payload = await readBoundedJson(response);
   } catch {
     throw new RuntimeTrustRequestError(
-      `Runtime registration delete failed (${response.status})`,
+      `Runtime removal failed (${response.status})`,
     );
   }
-  throw requestErrorFrom(payload, response.status);
+  if (!response.ok) throw requestErrorFrom(payload, response.status);
+  const operation = parseRuntimeRemovalOperationResponse(payload);
+  if (
+    operation.workspace_id !== workspaceId ||
+    operation.runtime_id !== runtimeId
+  ) {
+    throw new RuntimeTrustRequestError(
+      "Runtime removal response did not match the selected Runtime",
+    );
+  }
+  if (
+    operation.state !== "succeeded" ||
+    !operation.binding_removed ||
+    operation.runtime_registration_removed !== true
+  ) {
+    throw new RuntimeTrustRequestError(
+      "Runtime removal did not reach authoritative completion",
+    );
+  }
+  return operation;
 }
 
 export async function revealRuntimeTrustKey(
diff --git a/web/workspace/src/routes/w/[workspaceId]/settings/runtimes/[runtimeId]/+page.svelte b/web/workspace/src/routes/w/[workspaceId]/settings/runtimes/[runtimeId]/+page.svelte
index a06ce45b..7ce80ef9 100644
--- a/web/workspace/src/routes/w/[workspaceId]/settings/runtimes/[runtimeId]/+page.svelte
+++ b/web/workspace/src/routes/w/[workspaceId]/settings/runtimes/[runtimeId]/+page.svelte
@@ -6,7 +6,7 @@
   } from '$lib/generated/workspace-api';
   import {
     createRemoteRuntime,
-    deleteRemoteRuntime,
+    removeRemoteRuntime,
     previewRuntimePublicKeyFingerprint,
     revealRuntimeTrustKey,
     revokeRuntimeTrustKey,
@@ -284,36 +284,34 @@
       return;
     }
 
-    const operation = routeFence.capture(data.runtimeId);
+    const routeOperation = routeFence.capture(data.runtimeId);
+    const trust = data.runtimeDetail.trust_key;
+    if (trust.revision == null) {
+      deleteRuntimeError = 'The authoritative Runtime binding revision is unavailable. Reload before removal.';
+      return;
+    }
     busyAction = 'delete';
     deleteRuntimeError = null;
     try {
-      if (data.runtimeDetail.trust_key.status !== 'revoked') {
-        const trust = data.runtimeDetail.trust_key;
-        if (trust.revision == null || !trust.fingerprint) {
-          throw new Error('Runtime trust revision and fingerprint are required before deletion.');
-        }
-        await revokeRuntimeTrustKey(
-          data.workspaceId,
-          operation.runtimeId,
-          { expected_revision: trust.revision },
-          trust.fingerprint,
-          trust.fingerprint,
-        );
-        if (!isCurrentRoute(operation)) return;
-      }
-      await deleteRemoteRuntime(data.workspaceId, operation.runtimeId);
-      if (!isCurrentRoute(operation)) return;
+      await removeRemoteRuntime(
+        data.workspaceId,
+        routeOperation.runtimeId,
+        {
+          operation_id: crypto.randomUUID(),
+          expected_binding_revision: trust.revision,
+        },
+      );
+      if (!isCurrentRoute(routeOperation)) return;
       await goto(`/w/${encodeURIComponent(data.workspaceId)}/settings/runtimes`, {
         replaceState: true,
       });
     } catch (error) {
-      if (!isCurrentRoute(operation)) return;
+      if (!isCurrentRoute(routeOperation)) return;
       deleteRuntimeError = error instanceof Error
         ? error.message
         : 'Runtime registration deletion failed.';
     } finally {
-      if (isCurrentRoute(operation)) busyAction = null;
+      if (isCurrentRoute(routeOperation)) busyAction = null;
     }
   }
 
@@ -589,14 +587,13 @@
       <section class="runtime-detail-section runtime-danger-zone" aria-labelledby="runtime-delete-heading">
         <h2 id="runtime-delete-heading">Delete Runtime registration</h2>
         <p>
-          Remove this Runtime binding from the current Workspace. This does not stop the Runtime process,
-          delete its Workers or Workdirs, or revoke this Workspace on the Runtime host.
+          The Backend removes Workspace trust and this Runtime registration as one guarded operation.
+          Active Workers, Workdirs, assignments, pending create or removal work, configuration references,
+          or another Workspace binding block the operation without changing trust.
+        </p>
+        <p class="section-state warning">
+          This does not stop the Runtime process or delete its Workers or Workdirs.
         </p>
-        {#if trust.status !== 'revoked'}
-          <p class="section-state warning">
-            Deletion will revoke this Workspace trust first. Stop or move active Workers before continuing.
-          </p>
-        {/if}
         <label for="runtime-delete-confirmation">Confirm Runtime ID</label>
         <input
           id="runtime-delete-confirmation"
@@ -616,11 +613,7 @@
             class="danger"
             disabled={busyAction !== null || deleteRuntimeConfirmation.trim() !== data.runtimeId}
             onclick={deleteRegistration}
-          >{busyAction === 'delete'
-              ? 'Deleting…'
-              : trust.status === 'revoked'
-              ? 'Delete registration'
-              : 'Revoke trust and delete registration'}</button>
+          >{busyAction === 'delete' ? 'Removing…' : 'Remove Runtime registration'}</button>
         </div>
       </section>
     {/if}
diff --git a/web/workspace/tests/runtime-management-source.test.ts b/web/workspace/tests/runtime-management-source.test.ts
index 36120765..37c3229a 100644
--- a/web/workspace/tests/runtime-management-source.test.ts
+++ b/web/workspace/tests/runtime-management-source.test.ts
@@ -177,12 +177,13 @@ Deno.test("Runtime detail keeps trust controls owner-only and conflict-safe", as
       "Revoke Workspace trust",
       "Workspace trust only; this does not delete the Runtime process, Workers, or Workdirs.",
       "await revokeRuntimeTrustKey(",
-      "deleteRemoteRuntime(data.workspaceId, operation.runtimeId)",
-      "Revoke trust and delete registration",
-      "trust.status !== 'revoked'",
+      "await removeRemoteRuntime(",
+      "operation_id: crypto.randomUUID()",
+      "expected_binding_revision: trust.revision",
+      "The Backend removes Workspace trust and this Runtime registration as one guarded operation.",
       "deleteRuntimeConfirmation.trim() !== data.runtimeId",
       "Delete Runtime registration",
-      "Delete registration",
+      "Remove Runtime registration",
       "This does not stop the Runtime process",
       "RuntimeTrustConflictError",
       "RuntimeTrustRouteFence",
@@ -211,6 +212,9 @@ Deno.test("Runtime detail keeps trust controls owner-only and conflict-safe", as
       "fingerprintConfirmation",
       "revokeFingerprintConfirmation",
       "Confirm current fingerprint",
+      "deleteRemoteRuntime",
+      "if (data.runtimeDetail.trust_key.status !== 'revoked')",
+      "Revoke trust and delete registration",
     ]
   ) {
     assert(!page.includes(token), `Runtime detail must not require ${token}`);
diff --git a/web/workspace/tests/runtime-management.test.ts b/web/workspace/tests/runtime-management.test.ts
index dc6e1a72..67c9c3bf 100644
--- a/web/workspace/tests/runtime-management.test.ts
+++ b/web/workspace/tests/runtime-management.test.ts
@@ -4,12 +4,13 @@ declare const Deno: {
 
 import {
   createRemoteRuntime,
-  deleteRemoteRuntime,
+  parseRuntimeRemovalOperationResponse,
   parseRuntimeTrustConflict,
   parseRuntimeTrustKeyRevealResponse,
   parseWorkspaceRuntimeDetail,
   parseWorkspaceRuntimeList,
   previewRuntimePublicKeyFingerprint,
+  removeRemoteRuntime,
   revokeRuntimeTrustKey,
   RuntimeTrustConflictError,
   RuntimeTrustRouteFence,
@@ -313,22 +314,56 @@ Deno.test("Runtime metadata update never sends public key authority", async () =
   assert(!("public_key" in body), "metadata update sent public_key");
 });
 
-Deno.test("Runtime registration delete uses the Workspace-scoped resource route", async () => {
+Deno.test("Runtime removal uses the Workspace-scoped operation route", async () => {
   let requestedUrl = "";
   let requestedMethod = "";
+  let requestedBody: unknown = null;
   const fetchImpl = ((input: string | URL | Request, init?: RequestInit) => {
     requestedUrl = String(input);
     requestedMethod = init?.method ?? "GET";
-    return Promise.resolve(new Response(null, { status: 204 }));
+    requestedBody = JSON.parse(String(init?.body));
+    return Promise.resolve(Response.json({
+      operation_id: "remove-runtime-a",
+      workspace_id: "workspace a",
+      runtime_id: "runtime/a",
+      state: "succeeded",
+      binding_removed: true,
+      runtime_registration_removed: true,
+      created_at: "2026-01-01T00:00:00Z",
+      updated_at: "2026-01-01T00:00:01Z",
+      completed_at: "2026-01-01T00:00:01Z",
+    }));
   }) as typeof fetch;
 
-  await deleteRemoteRuntime("workspace a", "runtime/a", fetchImpl);
+  const operation = await removeRemoteRuntime(
+    "workspace a",
+    "runtime/a",
+    { operation_id: "remove-runtime-a", expected_binding_revision: 7 },
+    fetchImpl,
+  );
 
   assert(
     requestedUrl === "/api/w/workspace%20a/runtimes/runtime%2Fa",
-    `unexpected delete URL: ${requestedUrl}`,
+    `unexpected removal URL: ${requestedUrl}`,
+  );
+  assert(requestedMethod === "DELETE", "Runtime removal must use DELETE");
+  assert(
+    JSON.stringify(requestedBody) === JSON.stringify({
+      operation_id: "remove-runtime-a",
+      expected_binding_revision: 7,
+    }),
+    "Runtime removal request body drifted",
+  );
+  assert(operation.state === "succeeded", "Runtime removal did not complete");
+
+  assertThrows(
+    () =>
+      parseRuntimeRemovalOperationResponse({
+        ...operation,
+        unknown: "rejected",
+      }),
+    "not part of the wire contract",
   );
-  assert(requestedMethod === "DELETE", "Runtime delete must use DELETE");
 });
 
 Deno.test("Runtime route fence rejects a delayed reveal from the prior Runtime", async () => {