diff --git a/apps/mana/apps/web/src/lib/data/events/catalog.ts b/apps/mana/apps/web/src/lib/data/events/catalog.ts
index ae42400e5..53755d47f 100644
--- a/apps/mana/apps/web/src/lib/data/events/catalog.ts
+++ b/apps/mana/apps/web/src/lib/data/events/catalog.ts
@@ -543,6 +543,33 @@ export interface SleepLoggedPayload {
 }
 export type SleepEventType = 'SleepLogged';
 
+// ── Companion (Chat + Tools) ────────────────────────
+
+export interface CompanionConversationStartedPayload {
+	conversationId: string;
+	title?: string;
+}
+
+export interface CompanionMessageSentPayload {
+	messageId: string;
+	conversationId: string;
+	role: 'user' | 'assistant';
+	contentLength: number;
+}
+
+export interface CompanionToolCalledPayload {
+	tool: string;
+	module: string;
+	success: boolean;
+	latencyMs: number;
+	errorMessage?: string;
+}
+
+export type CompanionEventType =
+	| 'CompanionConversationStarted'
+	| 'CompanionMessageSent'
+	| 'CompanionToolCalled';
+
 // ── Body ────────────────────────────────────────────
 
 export interface WorkoutStartedPayload {
@@ -637,6 +664,7 @@ export type ManaEventType =
 	| QuestionsEventType
 	| MeditateEventType
 	| SleepEventType
+	| CompanionEventType
 	| SocialEventsEventType
 	| BodyEventType
 	| SystemEventType;
@@ -742,6 +770,10 @@ export type ManaEvent =
 	| DomainEvent<'MeditationCompleted', MeditationCompletedPayload>
 	// Sleep
 	| DomainEvent<'SleepLogged', SleepLoggedPayload>
+	// Companion
+	| DomainEvent<'CompanionConversationStarted', CompanionConversationStartedPayload>
+	| DomainEvent<'CompanionMessageSent', CompanionMessageSentPayload>
+	| DomainEvent<'CompanionToolCalled', CompanionToolCalledPayload>
 	// Social Events
 	| DomainEvent<'SocialEventCreated', SocialEventCreatedPayload>
 	| DomainEvent<'SocialEventDeleted', SocialEventDeletedPayload>
diff --git a/apps/mana/apps/web/src/lib/modules/companion/engine.ts b/apps/mana/apps/web/src/lib/modules/companion/engine.ts
index 5def48188..cf19b46b2 100644
--- a/apps/mana/apps/web/src/lib/modules/companion/engine.ts
+++ b/apps/mana/apps/web/src/lib/modules/companion/engine.ts
@@ -11,6 +11,8 @@ import { generateContextDocument } from '$lib/data/projections/context-document'
 import { getToolsForLlm, executeTool } from '$lib/data/tools';
 import { authStore } from '$lib/stores/auth.svelte';
 import type { DaySnapshot, StreakInfo } from '$lib/data/projections/types';
+import { emitDomainEvent } from '$lib/data/events';
+import { getTool } from '$lib/data/tools/registry';
 import type { LocalMessage } from './types';
 import type { ToolResult } from '$lib/data/tools/types';
 
@@ -230,8 +232,21 @@ export async function runCompanionChat(
 			break;
 		}
 
-		// Execute the tool
+		// Execute the tool with timing
+		const toolStartedAt = Date.now();
 		const toolResult = await executeTool(toolCall.name, toolCall.params);
+		const toolLatencyMs = Date.now() - toolStartedAt;
+
+		// Emit observability event for the tool call
+		const toolDef = getTool(toolCall.name);
+		emitDomainEvent('CompanionToolCalled', 'companion', 'tools', toolCall.name, {
+			tool: toolCall.name,
+			module: toolDef?.module ?? 'unknown',
+			success: toolResult.success,
+			latencyMs: toolLatencyMs,
+			errorMessage: toolResult.success ? undefined : toolResult.message,
+		});
+
 		toolCalls.push({ name: toolCall.name, params: toolCall.params, result: toolResult });
 
 		// Build response text from before/after the tool block
diff --git a/apps/mana/apps/web/src/lib/modules/companion/stores/chat.svelte.ts b/apps/mana/apps/web/src/lib/modules/companion/stores/chat.svelte.ts
index 01ea0df92..a1a9f9850 100644
--- a/apps/mana/apps/web/src/lib/modules/companion/stores/chat.svelte.ts
+++ b/apps/mana/apps/web/src/lib/modules/companion/stores/chat.svelte.ts
@@ -7,6 +7,7 @@
  */
 
 import { db } from '$lib/data/database';
+import { emitDomainEvent } from '$lib/data/events';
 import type { LocalConversation, LocalMessage } from '../types';
 
 const CONV_TABLE = 'companionConversations';
@@ -24,6 +25,10 @@ export const chatStore = {
 			updatedAt: now,
 		};
 		await db.table<LocalConversation>(CONV_TABLE).add(conv);
+		emitDomainEvent('CompanionConversationStarted', 'companion', CONV_TABLE, conv.id, {
+			conversationId: conv.id,
+			title: conv.title,
+		});
 		return conv;
 	},
 
@@ -68,6 +73,16 @@ export const chatStore = {
 			updatedAt: msg.createdAt,
 		});
 
+		// Emit event only for actual user/assistant messages, not tool plumbing
+		if (role === 'user' || role === 'assistant') {
+			emitDomainEvent('CompanionMessageSent', 'companion', MSG_TABLE, msg.id, {
+				messageId: msg.id,
+				conversationId,
+				role,
+				contentLength: content.length,
+			});
+		}
+
 		return msg;
 	},
 
diff --git a/apps/mana/apps/web/src/lib/modules/eventstream/ListView.svelte b/apps/mana/apps/web/src/lib/modules/eventstream/ListView.svelte
index 8aa6fef2c..6a181772a 100644
--- a/apps/mana/apps/web/src/lib/modules/eventstream/ListView.svelte
+++ b/apps/mana/apps/web/src/lib/modules/eventstream/ListView.svelte
@@ -14,6 +14,8 @@
 		ForkKnife,
 		MapPin,
 		Lightning,
+		Robot,
+		ChatCircle,
 	} from '@mana/shared-icons';
 
 	let events = $state<DomainEvent[]>([]);
@@ -31,6 +33,9 @@
 		MealFromPhotoLogged: { icon: ForkKnife, color: '#F97316' },
 		PlaceVisited: { icon: MapPin, color: '#A855F7' },
 		PlaceCreated: { icon: MapPin, color: '#10B981' },
+		CompanionConversationStarted: { icon: ChatCircle, color: '#8B5CF6' },
+		CompanionMessageSent: { icon: ChatCircle, color: '#A78BFA' },
+		CompanionToolCalled: { icon: Robot, color: '#6366F1' },
 	};
 
 	const EVENT_LABELS: Record<string, (p: Record<string, unknown>) => string> = {
@@ -55,6 +60,11 @@
 		TrackingStarted: () => 'Tracking gestartet',
 		TrackingStopped: () => 'Tracking gestoppt',
 		GoalReached: (p) => `Ziel erreicht: "${p.title}"`,
+		CompanionConversationStarted: (p) =>
+			`Companion-Chat gestartet${p.title ? `: "${p.title}"` : ''}`,
+		CompanionMessageSent: (p) =>
+			`${p.role === 'user' ? 'Du' : 'Companion'}: ${p.contentLength} Zeichen`,
+		CompanionToolCalled: (p) => `Tool: ${p.tool}${p.success ? '' : ' (Fehler)'} (${p.latencyMs}ms)`,
 	};
 
 	function formatTime(iso: string): string {