diff --git a/src/firehose.ts b/src/firehose.ts
index 5e24de7..b95d33f 100644
--- a/src/firehose.ts
+++ b/src/firehose.ts
@@ -1,9 +1,11 @@
-import { type Event } from '@/deps.ts';
+import { Debug, type Event } from '@/deps.ts';
 import { activeRelays, pool } from '@/pool.ts';
 import { nostrNow } from '@/utils.ts';
 
 import * as pipeline from './pipeline.ts';
 
+const debug = Debug('ditto:firehose');
+
 // This file watches events on all known relays and performs
 // side-effects based on them, such as trending hashtag tracking
 // and storing events for notifications and the home feed.
@@ -17,6 +19,8 @@ pool.subscribe(
 
 /** Handle events through the firehose pipeline. */
 function handleEvent(event: Event): Promise<void> {
+  debug(`Event<${event.kind}> ${event.id}`);
+
   return pipeline
     .handleEvent(event)
     .catch(() => {});
diff --git a/src/stats.ts b/src/stats.ts
index 32208df..0e9c707 100644
--- a/src/stats.ts
+++ b/src/stats.ts
@@ -1,6 +1,6 @@
 import { type AuthorStatsRow, db, type DittoDB, type EventStatsRow } from '@/db.ts';
 import * as eventsDB from '@/db/events.ts';
-import { type Event, findReplyTag, type InsertQueryBuilder } from '@/deps.ts';
+import { Debug, type Event, findReplyTag, type InsertQueryBuilder } from '@/deps.ts';
 
 type AuthorStat = keyof Omit<AuthorStatsRow, 'pubkey'>;
 type EventStat = keyof Omit<EventStatsRow, 'event_id'>;
@@ -9,6 +9,8 @@ type AuthorStatDiff = ['author_stats', pubkey: string, stat: AuthorStat, diff: n
 type EventStatDiff = ['event_stats', eventId: string, stat: EventStat, diff: number];
 type StatDiff = AuthorStatDiff | EventStatDiff;
 
+const debug = Debug('ditto:stats');
+
 /** Store stats for the event in LMDB. */
 async function updateStats<K extends number>(event: Event<K>) {
   let prev: Event<K> | undefined;
@@ -26,6 +28,10 @@ async function updateStats<K extends number>(event: Event<K>) {
   const pubkeyDiffs = statDiffs.filter(([table]) => table === 'author_stats') as AuthorStatDiff[];
   const eventDiffs = statDiffs.filter(([table]) => table === 'event_stats') as EventStatDiff[];
 
+  if (statDiffs.length) {
+    debug({ id: event.id, pubkey: event.pubkey, kind: event.kind, tags: event.tags, statDiffs });
+  }
+
   if (pubkeyDiffs.length) queries.push(authorStatsQuery(pubkeyDiffs));
   if (eventDiffs.length) queries.push(eventStatsQuery(eventDiffs));
 
diff --git a/src/subs.ts b/src/subs.ts
index f9d6606..be2ec9c 100644
--- a/src/subs.ts
+++ b/src/subs.ts
@@ -1,9 +1,11 @@
-import { type Event } from '@/deps.ts';
+import { Debug, type Event } from '@/deps.ts';
 import { Subscription } from '@/subscription.ts';
 
 import type { DittoFilter } from '@/filter.ts';
 import type { EventData } from '@/types.ts';
 
+const debug = Debug('ditto:subs');
+
 /**
  * Manages Ditto event subscriptions.
  * Subscriptions can be added, removed, and matched against events.
@@ -21,6 +23,7 @@ class SubscriptionStore {
    * ```
    */
   sub<K extends number>(socket: unknown, id: string, filters: DittoFilter<K>[]): Subscription<K> {
+    debug('sub', id, filters);
     let subs = this.#store.get(socket);
 
     if (!subs) {
@@ -38,12 +41,14 @@ class SubscriptionStore {
 
   /** Remove a subscription from the store. */
   unsub(socket: unknown, id: string): void {
+    debug('unsub', id);
     this.#store.get(socket)?.get(id)?.close();
     this.#store.get(socket)?.delete(id);
   }
 
   /** Remove an entire socket. */
   close(socket: unknown): void {
+    debug('close', socket);
     const subs = this.#store.get(socket);
 
     if (subs) {