feat: add feature to monitor background agents (#125)

Also includes a fix to persist configuration across reconnects.

Reviewed-on: #125
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/lib/components/AgentMonitorPanel.svelte

@@ -0,0 +1,328 @@
+<script lang="ts">
+  import { SvelteMap } from "svelte/reactivity";
+  import { invoke } from "@tauri-apps/api/core";
+  import { claudeStore } from "$lib/stores/claude";
+  import { agentStore, getAgentsForConversation } from "$lib/stores/agents";
+  import type { AgentInfo } from "$lib/types/agents";
+  import { onMount, onDestroy } from "svelte";
+
+  interface Props {
+    isOpen: boolean;
+    onClose: () => void;
+  }
+
+  const { isOpen, onClose }: Props = $props();
+
+  let now = $state(Date.now());
+  let timerInterval: ReturnType<typeof setInterval> | null = null;
+
+  // We need a reactive subscription to agents for the active conversation
+  let agents: AgentInfo[] = $state([]);
+  let agentsUnsubscribe: (() => void) | null = null;
+
+  // Track active conversation reactively
+  let currentConversationId = $state<string | null>("");
+  const conversationIdUnsubscribe = claudeStore.activeConversationId.subscribe((id) => {
+    currentConversationId = id;
+  });
+
+  $effect(() => {
+    // Re-subscribe when conversation changes
+    if (agentsUnsubscribe) {
+      agentsUnsubscribe();
+    }
+    if (currentConversationId) {
+      const store = getAgentsForConversation(currentConversationId);
+      agentsUnsubscribe = store.subscribe((value) => {
+        agents = value;
+      });
+    } else {
+      agents = [];
+    }
+  });
+
+  const runningAgents = $derived(agents.filter((a) => a.status === "running"));
+  const completedAgents = $derived(agents.filter((a) => a.status === "completed"));
+  const erroredAgents = $derived(agents.filter((a) => a.status === "errored"));
+
+  // Organize agents into a tree structure based on parent_tool_use_id
+  const agentTree = $derived.by(() => {
+    const topLevel = agents.filter((a) => !a.parentToolUseId);
+    const childrenMap = new SvelteMap<string, AgentInfo[]>();
+
+    // Group children by their parent
+    agents.forEach((agent) => {
+      if (agent.parentToolUseId) {
+        const siblings = childrenMap.get(agent.parentToolUseId) || [];
+        siblings.push(agent);
+        childrenMap.set(agent.parentToolUseId, siblings);
+      }
+    });
+
+    return { topLevel, childrenMap };
+  });
+
+  onMount(() => {
+    timerInterval = setInterval(() => {
+      now = Date.now();
+    }, 1000);
+  });
+
+  onDestroy(() => {
+    if (timerInterval) clearInterval(timerInterval);
+    if (agentsUnsubscribe) agentsUnsubscribe();
+    conversationIdUnsubscribe();
+  });
+
+  function formatDuration(startedAt: number, endedAt?: number): string {
+    const end = endedAt || now;
+    const durationMs = end - startedAt;
+    const seconds = Math.floor(durationMs / 1000);
+    const minutes = Math.floor(seconds / 60);
+    const hours = Math.floor(minutes / 60);
+
+    if (hours > 0) {
+      return `${hours}h ${minutes % 60}m ${seconds % 60}s`;
+    }
+    if (minutes > 0) {
+      return `${minutes}m ${seconds % 60}s`;
+    }
+    return `${seconds}s`;
+  }
+
+  function getSubagentTypeLabel(type: string): string {
+    const labels: Record<string, string> = {
+      Explore: "Explorer",
+      "general-purpose": "General",
+      Plan: "Planner",
+      Bash: "Shell",
+    };
+    return labels[type] || type;
+  }
+
+  function getStatusBadgeClass(status: string): string {
+    switch (status) {
+      case "running":
+        return "bg-blue-500/20 text-blue-400 border-blue-500/30";
+      case "completed":
+        return "bg-green-500/20 text-green-400 border-green-500/30";
+      case "errored":
+        return "bg-red-500/20 text-red-400 border-red-500/30";
+      default:
+        return "bg-gray-500/20 text-gray-400 border-gray-500/30";
+    }
+  }
+
+  async function handleKillAll() {
+    if (!currentConversationId) return;
+
+    try {
+      await invoke("interrupt_claude", { conversationId: currentConversationId });
+    } catch (error) {
+      console.error("Failed to kill Claude process:", error);
+    }
+  }
+
+  function handleClearCompleted() {
+    if (currentConversationId) {
+      agentStore.clearCompleted(currentConversationId);
+    }
+  }
+
+  // Flatten the tree for rendering with depth information
+  const flattenedAgents = $derived.by(() => {
+    const result: { agent: AgentInfo; depth: number }[] = [];
+    const { topLevel, childrenMap } = agentTree;
+
+    function addAgentAndChildren(agent: AgentInfo, depth: number) {
+      result.push({ agent, depth });
+      const children = childrenMap.get(agent.toolUseId);
+      if (children) {
+        children.forEach((child) => addAgentAndChildren(child, depth + 1));
+      }
+    }
+
+    topLevel.forEach((agent) => addAgentAndChildren(agent, 0));
+    return result;
+  });
+</script>
+
+{#if isOpen}
+  <!-- svelte-ignore a11y_click_events_have_key_events -->
+  <!-- svelte-ignore a11y_no_static_element_interactions -->
+  <div class="fixed inset-0 z-40" onclick={onClose}></div>
+
+  <div
+    class="fixed top-12 right-0 bottom-0 w-80 bg-[var(--bg-primary)] border-l border-[var(--border-color)] shadow-xl z-50 flex flex-col overflow-hidden"
+  >
+    <!-- Header -->
+    <div class="flex items-center justify-between p-4 border-b border-[var(--border-color)]">
+      <div class="flex items-center gap-2">
+        <svg
+          class="w-5 h-5 text-[var(--accent-primary)]"
+          fill="none"
+          stroke="currentColor"
+          viewBox="0 0 24 24"
+        >
+          <path
+            stroke-linecap="round"
+            stroke-linejoin="round"
+            stroke-width="2"
+            d="M9 3v2m6-2v2M9 19v2m6-2v2M5 9H3m2 6H3m18-6h-2m2 6h-2M7 19h10a2 2 0 002-2V7a2 2 0 00-2-2H7a2 2 0 00-2 2v10a2 2 0 002 2zM9 9h6v6H9V9z"
+          />
+        </svg>
+        <h3 class="text-sm font-semibold text-[var(--text-primary)]">Agent Monitor</h3>
+        {#if runningAgents.length > 0}
+          <span
+            class="px-1.5 py-0.5 text-xs rounded-full bg-blue-500/20 text-blue-400 animate-pulse"
+          >
+            {runningAgents.length} running
+          </span>
+        {/if}
+      </div>
+      <button
+        onclick={onClose}
+        class="p-1 text-[var(--text-secondary)] hover:text-[var(--text-primary)] transition-colors"
+        aria-label="Close agent monitor"
+      >
+        <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+          <path
+            stroke-linecap="round"
+            stroke-linejoin="round"
+            stroke-width="2"
+            d="M6 18L18 6M6 6l12 12"
+          />
+        </svg>
+      </button>
+    </div>
+
+    <!-- Action buttons -->
+    <div class="flex gap-2 px-4 py-2 border-b border-[var(--border-color)]">
+      <button
+        onclick={handleKillAll}
+        disabled={runningAgents.length === 0}
+        class="flex-1 px-2 py-1 text-xs bg-red-500/20 hover:bg-red-500/30 text-red-400 rounded transition-colors disabled:opacity-40 disabled:cursor-not-allowed"
+        title="Kills the entire Claude Code process to stop all agents"
+      >
+        Kill All
+      </button>
+      <button
+        onclick={handleClearCompleted}
+        disabled={completedAgents.length === 0 && erroredAgents.length === 0}
+        class="flex-1 px-2 py-1 text-xs bg-[var(--bg-secondary)] hover:bg-[var(--bg-hover,var(--bg-secondary))] text-[var(--text-secondary)] rounded transition-colors disabled:opacity-40 disabled:cursor-not-allowed"
+      >
+        Clear Finished
+      </button>
+    </div>
+
+    <!-- Agent list -->
+    <div class="flex-1 overflow-y-auto p-4 space-y-2">
+      {#if agents.length === 0}
+        <div
+          class="flex flex-col items-center justify-center h-full text-[var(--text-secondary)] text-sm"
+        >
+          <svg
+            class="w-8 h-8 mb-2 opacity-50"
+            fill="none"
+            stroke="currentColor"
+            viewBox="0 0 24 24"
+          >
+            <path
+              stroke-linecap="round"
+              stroke-linejoin="round"
+              stroke-width="2"
+              d="M9 3v2m6-2v2M9 19v2m6-2v2M5 9H3m2 6H3m18-6h-2m2 6h-2M7 19h10a2 2 0 002-2V7a2 2 0 00-2-2H7a2 2 0 00-2 2v10a2 2 0 002 2zM9 9h6v6H9V9z"
+            />
+          </svg>
+          <p>No agents detected yet</p>
+          <p class="text-xs mt-1 opacity-70">
+            Agents will appear here when Claude uses the Task tool
+          </p>
+        </div>
+      {:else}
+        {#each flattenedAgents as { agent, depth } (agent.toolUseId)}
+          <div
+            class="p-3 rounded-lg border border-[var(--border-color)] bg-[var(--bg-secondary)] {agent.status ===
+            'running'
+              ? 'border-l-2 border-l-blue-500'
+              : agent.status === 'errored'
+                ? 'border-l-2 border-l-red-500'
+                : 'border-l-2 border-l-green-500'}"
+            style="margin-left: {depth * 12}px; width: calc(100% - {depth * 12}px);"
+          >
+            <!-- Agent header -->
+            <div class="flex items-center justify-between mb-1">
+              <div class="flex items-center gap-1.5">
+                {#if depth > 0}
+                  <svg
+                    class="w-3 h-3 text-[var(--text-secondary)]"
+                    fill="none"
+                    stroke="currentColor"
+                    viewBox="0 0 24 24"
+                  >
+                    <path
+                      stroke-linecap="round"
+                      stroke-linejoin="round"
+                      stroke-width="2"
+                      d="M9 5l7 7-7 7"
+                    />
+                  </svg>
+                {/if}
+                <span
+                  class="px-1.5 py-0.5 text-[10px] rounded border {getStatusBadgeClass(
+                    agent.status
+                  )}"
+                >
+                  {getSubagentTypeLabel(agent.subagentType)}
+                </span>
+              </div>
+              <span
+                class="text-[10px] {agent.status === 'running'
+                  ? 'text-blue-400'
+                  : 'text-[var(--text-secondary)]'}"
+              >
+                {#if agent.durationMs !== undefined}
+                  {Math.floor(agent.durationMs / 1000)}s
+                {:else}
+                  {formatDuration(agent.startedAt, agent.endedAt)}
+                {/if}
+                {#if agent.status === "running"}
+                  <span class="inline-block w-1 h-1 bg-blue-400 rounded-full animate-pulse ml-1"
+                  ></span>
+                {/if}
+              </span>
+            </div>
+
+            <!-- Agent description -->
+            <p class="text-xs text-[var(--text-primary)] truncate" title={agent.description}>
+              {agent.description}
+            </p>
+
+            <!-- Status indicator -->
+            <div class="mt-1 flex items-center gap-1">
+              {#if agent.status === "running"}
+                <span class="text-[10px] text-blue-400">Running...</span>
+              {:else if agent.status === "completed"}
+                <span class="text-[10px] text-green-400">Completed</span>
+              {:else}
+                <span class="text-[10px] text-red-400">Errored / Killed</span>
+              {/if}
+            </div>
+          </div>
+        {/each}
+      {/if}
+    </div>
+
+    <!-- Footer summary -->
+    {#if agents.length > 0}
+      <div
+        class="px-4 py-2 border-t border-[var(--border-color)] text-[10px] text-[var(--text-secondary)]"
+      >
+        {agents.length} total &middot;
+        {runningAgents.length} running &middot;
+        {completedAgents.length} completed &middot;
+        {erroredAgents.length} errored
+      </div>
+    {/if}
+  </div>
+{/if}

src/lib/components/InputBar.svelte

@@ -355,6 +355,10 @@ User: ${formattedMessage}`;
             conversationId,
             options: {
               working_dir: workingDir,
+              model: config.model || null,
+              api_key: config.api_key || null,
+              custom_instructions: config.custom_instructions || null,
+              mcp_servers_json: config.mcp_servers_json || null,
               allowed_tools: allAllowedTools,
             },
           });

src/lib/components/PermissionModal.svelte

@@ -57,16 +57,20 @@
         // Small delay to ensure clean shutdown
         await new Promise((resolve) => setTimeout(resolve, 500));
 
+        const config = configStore.getConfig();
         await invoke("start_claude", {
           conversationId,
           options: {
             working_dir: workingDirectory || "/home/naomi",
+            model: config.model || null,
+            api_key: config.api_key || null,
+            custom_instructions: config.custom_instructions || null,
+            mcp_servers_json: config.mcp_servers_json || null,
             allowed_tools: newGrantedTools,
           },
         });
 
         // Update Discord RPC when reconnecting after permission grant
-        const config = configStore.getConfig();
         const activeConversation = get(conversationsStore.activeConversation);
         if (activeConversation) {
           await updateDiscordRpc(

src/lib/components/StatusBar.svelte

@@ -21,9 +21,11 @@
   import HelpPanel from "./HelpPanel.svelte";
   import KeyboardShortcutsModal from "./KeyboardShortcutsModal.svelte";
   import { achievementProgress } from "$lib/stores/achievements";
+  import { runningAgentCount } from "$lib/stores/agents";
   import SessionHistoryPanel from "./SessionHistoryPanel.svelte";
   import GitPanel from "./GitPanel.svelte";
   import ProfilePanel from "./ProfilePanel.svelte";
+  import AgentMonitorPanel from "./AgentMonitorPanel.svelte";
   import { conversationsStore } from "$lib/stores/conversations";
   import {
     generateContextInjection,
@@ -48,8 +50,10 @@
   let showSessionHistory = $state(false);
   let showGitPanel = $state(false);
   let showProfile = $state(false);
+  let showAgentMonitor = $state(false);
   let isSummarising = $state(false);
   const progress = $derived($achievementProgress);
+  const activeAgentCount = $derived($runningAgentCount);
   let currentConfig: HikariConfig = $state({
     model: null,
     api_key: null,
@@ -466,6 +470,29 @@
         />
       </svg>
     </button>
+    <button
+      onclick={() => (showAgentMonitor = !showAgentMonitor)}
+      class="p-1 text-gray-500 icon-trans-hover relative {showAgentMonitor
+        ? 'text-[var(--trans-pink)]'
+        : ''}"
+      title="Agent Monitor"
+    >
+      <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+        <path
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          stroke-width="2"
+          d="M9 3v2m6-2v2M9 19v2m6-2v2M5 9H3m2 6H3m18-6h-2m2 6h-2M7 19h10a2 2 0 002-2V7a2 2 0 00-2-2H7a2 2 0 00-2 2v10a2 2 0 002 2zM9 9h6v6H9V9z"
+        />
+      </svg>
+      {#if activeAgentCount > 0}
+        <span
+          class="absolute -top-1 -right-1 bg-blue-500 text-white text-xs rounded-full w-4 h-4 flex items-center justify-center text-[10px] animate-pulse"
+        >
+          {activeAgentCount}
+        </span>
+      {/if}
+    </button>
     <button
       onclick={() => (showStats = !showStats)}
       class="p-1 text-gray-500 icon-trans-hover {showStats ? 'text-[var(--trans-pink)]' : ''}"
@@ -638,3 +665,7 @@
 {#if showProfile}
   <ProfilePanel onClose={() => (showProfile = false)} />
 {/if}
+
+{#if showAgentMonitor}
+  <AgentMonitorPanel isOpen={showAgentMonitor} onClose={() => (showAgentMonitor = false)} />
+{/if}

src/lib/components/Terminal.svelte

@@ -209,8 +209,30 @@
       </div>
     {:else}
       {#each lines as line (line.id)}
-        <div class="terminal-line mb-2 {getLineClass(line.type)} relative group">
+        <div
+          class="terminal-line mb-2 {getLineClass(line.type)} relative group"
+          style={line.parentToolUseId
+            ? "margin-left: 16px; padding-left: 8px; border-left: 2px solid var(--accent-primary);"
+            : ""}
+        >
           <span class="terminal-timestamp text-xs mr-2">{formatTime(line.timestamp)}</span>
+          {#if line.parentToolUseId}
+            <span class="text-xs mr-2 opacity-60" title="Message from subagent">
+              <svg
+                class="inline-block w-3 h-3 -mt-0.5"
+                fill="none"
+                stroke="currentColor"
+                viewBox="0 0 24 24"
+              >
+                <path
+                  stroke-linecap="round"
+                  stroke-linejoin="round"
+                  stroke-width="2"
+                  d="M9 5l7 7-7 7"
+                />
+              </svg>
+            </span>
+          {/if}
           {#if line.cost && line.cost.costUsd > 0}
             <span
               class="terminal-cost text-xs mr-2"

src/lib/components/UserQuestionModal.svelte

@@ -96,16 +96,20 @@
 
       await new Promise((resolve) => setTimeout(resolve, 500));
 
+      const config = configStore.getConfig();
       await invoke("start_claude", {
         conversationId,
         options: {
           working_dir: workingDirectory || "/home/naomi",
+          model: config.model || null,
+          api_key: config.api_key || null,
+          custom_instructions: config.custom_instructions || null,
+          mcp_servers_json: config.mcp_servers_json || null,
           allowed_tools: grantedToolsList,
         },
       });
 
       // Update Discord RPC when reconnecting after answering question
-      const config = configStore.getConfig();
       const activeConversation = get(conversationsStore.activeConversation);
       if (activeConversation) {
         await updateDiscordRpc(