Fix task route readiness and backfill

desktop/src/features/channels/ui/ChannelPane.helpers.test.mjs

@@ -3,6 +3,7 @@ import test from "node:test";
 
 import {
   canOpenAgentConversationInChannel,
+  getDmTaskAgentPubkeys,
   mergeAutoRouteMentionPubkeys,
 } from "./ChannelPane.helpers.ts";
 
@@ -74,3 +75,42 @@ test("auto-routed mentions merge with explicit mentions without duplicates", ()
     ["AGENT-ONE", "agent-two"],
   );
 });
+
+test("DM task agent inference requires exactly one other known agent", () => {
+  const knownAgentPubkeys = new Set(["agent-one", "agent-two"]);
+
+  assert.deepEqual(
+    getDmTaskAgentPubkeys({
+      channel: channel({
+        channelType: "dm",
+        participantPubkeys: ["human", "agent-one"],
+      }),
+      currentPubkey: "human",
+      knownAgentPubkeys,
+    }),
+    ["agent-one"],
+  );
+
+  assert.deepEqual(
+    getDmTaskAgentPubkeys({
+      channel: channel({
+        channelType: "dm",
+        participantPubkeys: ["human", "agent-one", "agent-two"],
+      }),
+      currentPubkey: "human",
+      knownAgentPubkeys,
+    }),
+    [],
+  );
+
+  assert.deepEqual(
+    getDmTaskAgentPubkeys({
+      channel: channel({
+        participantPubkeys: ["human", "agent-one"],
+      }),
+      currentPubkey: "human",
+      knownAgentPubkeys,
+    }),
+    [],
+  );
+});

desktop/src/features/channels/ui/ChannelPane.helpers.ts

@@ -1,5 +1,4 @@
 import { isEphemeralChannel } from "@/features/channels/lib/ephemeralChannel";
-import { collectMessageMentionPubkeys } from "@/features/messages/lib/formatTimelineMessages";
 import type { TimelineMessage } from "@/features/messages/types";
 import type { Channel } from "@/shared/api/types";
 import { KIND_SYSTEM_MESSAGE } from "@/shared/constants/kinds";
@@ -72,6 +71,55 @@ export function mentionsKnownAgent(
   );
 }
 
+function singleKnownAgentPubkey(
+  pubkeys: Iterable<string | null | undefined>,
+  knownAgentPubkeys: ReadonlySet<string>,
+) {
+  const agentPubkeys = new Map<string, string>();
+
+  for (const pubkey of pubkeys) {
+    if (!pubkey) {
+      continue;
+    }
+
+    const normalized = normalizePubkey(pubkey);
+    if (!knownAgentPubkeys.has(normalized)) {
+      continue;
+    }
+
+    agentPubkeys.set(normalized, pubkey);
+  }
+
+  return agentPubkeys.size === 1 ? [...agentPubkeys.values()] : [];
+}
+
+export function getDmTaskAgentPubkeys({
+  channel,
+  currentPubkey,
+  knownAgentPubkeys,
+}: {
+  channel: Channel | null;
+  currentPubkey?: string;
+  knownAgentPubkeys: ReadonlySet<string>;
+}) {
+  if (channel?.channelType !== "dm") {
+    return [];
+  }
+
+  const normalizedCurrentPubkey = currentPubkey
+    ? normalizePubkey(currentPubkey)
+    : null;
+
+  return singleKnownAgentPubkey(
+    channel.participantPubkeys.filter(
+      (pubkey) =>
+        !normalizedCurrentPubkey ||
+        normalizePubkey(pubkey) !== normalizedCurrentPubkey,
+    ),
+    knownAgentPubkeys,
+  );
+}
+
 export function mergeAutoRouteMentionPubkeys({
   autoRouteAgentPubkeys,
   mentionPubkeys,

desktop/src/features/channels/ui/ChannelPane.tsx

@@ -41,9 +41,9 @@ import {
 } from "@/features/channels/ui/WelcomeComposerBanner";
 import {
   canOpenAgentConversationInChannel,
-  getDmAutoRouteAgentPubkeys,
   getChannelIntroDescription,
   getChannelIntroKind,
+  getDmTaskAgentPubkeys,
   isWelcomeSetupSystemMessage,
   mentionsKnownAgent,
 } from "@/features/channels/ui/ChannelPane.helpers";
@@ -290,9 +290,9 @@ export const ChannelPane = React.memo(function ChannelPane({
 
     return pubkeys;
   }, [activityAgents, agentPubkeys, agentSessionAgents]);
-  const dmAutoRouteAgentPubkeys = React.useMemo(
+  const dmTaskAgentPubkeys = React.useMemo(
     () =>
-      getDmAutoRouteAgentPubkeys({
+      getDmTaskAgentPubkeys({
         channel: activeChannel,
         currentPubkey,
         knownAgentPubkeys,
@@ -374,7 +374,7 @@ export const ChannelPane = React.memo(function ChannelPane({
         }
       }
 
-      for (const pubkey of dmAutoRouteAgentPubkeys) {
+      for (const pubkey of dmTaskAgentPubkeys) {
         const dmAgent = knownAgentByPubkey.get(normalizePubkey(pubkey));
         if (dmAgent) {
           return dmAgent;
@@ -386,7 +386,7 @@ export const ChannelPane = React.memo(function ChannelPane({
     [
       activeAgentConversationMarkers,
       activeChannelId,
-      dmAutoRouteAgentPubkeys,
+      dmTaskAgentPubkeys,
       knownAgentByPubkey,
     ],
   );

desktop/src/features/channels/ui/ChannelScreen.tsx

@@ -344,7 +344,7 @@ export function ChannelScreen({
   const agentLookupReady =
     !channelMembersQuery.isLoading &&
     !managedAgentsQuery.isLoading &&
-    !messageProfilesQuery.isLoading &&
+    messageProfilesReady &&
     !relayAgentsQuery.isLoading;
   const agentPubkeys = React.useMemo(() => {
     const pubkeys = new Set<string>();