diff --git a/packages/control-plane/src/router.policy.test.ts b/packages/control-plane/src/router.policy.test.ts
index d5e1b4d91..855ffe73d 100644
--- a/packages/control-plane/src/router.policy.test.ts
+++ b/packages/control-plane/src/router.policy.test.ts
@@ -78,6 +78,8 @@ describe("route policy table", () => {
     ],
     ["GET", "/integration-settings/slack/watched-channels", [{ service: "slack-bot" }]],
     ["GET", "/model-preferences", [{ service: "slack-bot" }]],
+    ["GET", "/sessions/session-1/events", [{ service: "slack-bot" }, { service: "linear-bot" }]],
+    ["GET", "/sessions/session-1/artifacts", [{ service: "slack-bot" }, { service: "linear-bot" }]],
   ])("declares the exact actorless grants for %s %s", (method, path, expected) => {
     const authorization = routeFor(method, path)?.authorization;
     expect(["active-user", "active-global"]).toContain(authorization?.kind);
@@ -99,6 +101,8 @@ describe("route policy table", () => {
       routeFor("GET", "/integration-settings/github/resolved/acme/widgets"),
       routeFor("GET", "/integration-settings/slack/watched-channels"),
       routeFor("GET", "/model-preferences"),
+      routeFor("GET", "/sessions/session-1/events"),
+      routeFor("GET", "/sessions/session-1/artifacts"),
       routeFor("POST", "/sessions/session-1/stop"),
       routeFor("GET", "/sessions/session-1/media/artifact-1"),
     ]);
diff --git a/packages/control-plane/src/routes/session-runtime-proxy.ts b/packages/control-plane/src/routes/session-runtime-proxy.ts
index 7eb9244a7..ca926fe89 100644
--- a/packages/control-plane/src/routes/session-runtime-proxy.ts
+++ b/packages/control-plane/src/routes/session-runtime-proxy.ts
@@ -357,7 +357,9 @@ export const sessionRuntimeProxyRoutes: Route[] = [
     method: "GET",
     routePath: "/sessions/:id/events",
     internalPath: SessionInternalPaths.events,
-    authorization: requirePermission("sessions.read"),
+    authorization: requirePermission("sessions.read", {
+      actorlessGrants: [{ service: "slack-bot" }, { service: "linear-bot" }],
+    }),
     forwardSearch: true,
   }),
   simpleProxyRoute({
@@ -365,7 +367,9 @@ export const sessionRuntimeProxyRoutes: Route[] = [
     method: "GET",
     routePath: "/sessions/:id/artifacts",
     internalPath: SessionInternalPaths.artifacts,
-    authorization: requirePermission("sessions.read"),
+    authorization: requirePermission("sessions.read", {
+      actorlessGrants: [{ service: "slack-bot" }, { service: "linear-bot" }],
+    }),
   }),
   simpleProxyRoute({
     policy: GITHUB_USER_OR_SERVICE_ROUTE,
diff --git a/packages/control-plane/test/integration/service-auth.test.ts b/packages/control-plane/test/integration/service-auth.test.ts
index c3fd07e26..c1146490e 100644
--- a/packages/control-plane/test/integration/service-auth.test.ts
+++ b/packages/control-plane/test/integration/service-auth.test.ts
@@ -327,7 +327,7 @@ describe("sig1 service-credential authentication", () => {
     });
   });
 
-  it("allows only narrow actorless session callbacks", async () => {
+  it("allows only narrow actorless session callbacks and completion reads", async () => {
     const created = await signedFetch({
       service: "linear-bot",
       method: "POST",
@@ -348,6 +348,17 @@ describe("sig1 service-credential authentication", () => {
     });
     expect(linearStop.status).not.toBe(403);
 
+    for (const service of ["slack-bot", "linear-bot"] as const) {
+      for (const path of ["events", "artifacts"] as const) {
+        const completionRead = await signedFetch({
+          service,
+          method: "GET",
+          url: `https://test.local/sessions/${sessionId}/${path}`,
+        });
+        expect(completionRead.status, `${service} GET ${path}`).not.toBe(403);
+      }
+    }
+
     const slackMedia = await signedFetch({
       service: "slack-bot",
       method: "GET",