diff --git a/lib/ranking.ts b/lib/ranking.ts
index 64fcffea..8fd22391 100644
--- a/lib/ranking.ts
+++ b/lib/ranking.ts
@@ -56,13 +56,15 @@ function computeTrendScore(
 }
 
 /** Shared: fetch storyline candidates + batch ratings */
-async function fetchCandidatesAndRatings(supabase: SupabaseClient) {
+async function fetchCandidatesAndRatings(supabase: SupabaseClient, writerType?: number) {
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  const { data } = await (supabase.from("storylines") as any)
+  let q = (supabase.from("storylines") as any)
     .select("*")
     .eq("hidden", false)
     .eq("sunset", false)
-    .neq("token_address", "")
+    .neq("token_address", "");
+  if (writerType !== undefined) q = q.eq("writer_type", writerType);
+  const { data } = await q
     .order("block_timestamp", { ascending: false })
     .limit(50);
 
@@ -115,8 +117,9 @@ async function enrichWithOnChain(
 export async function getTrendingStorylines(
   supabase: SupabaseClient,
   limit = 20,
+  writerType?: number,
 ): Promise<RankedStoryline[]> {
-  const { storylines, ratingMap } = await fetchCandidatesAndRatings(supabase);
+  const { storylines, ratingMap } = await fetchCandidatesAndRatings(supabase, writerType);
   if (storylines.length === 0) return [];
 
   const enriched = await Promise.all(
@@ -153,8 +156,9 @@ export async function getTrendingStorylines(
 export async function getRisingStorylines(
   supabase: SupabaseClient,
   limit = 20,
+  writerType?: number,
 ): Promise<RankedStoryline[]> {
-  const { storylines } = await fetchCandidatesAndRatings(supabase);
+  const { storylines } = await fetchCandidatesAndRatings(supabase, writerType);
   if (storylines.length === 0) return [];
 
   const now = new Date();
diff --git a/src/app/discover/page.tsx b/src/app/discover/page.tsx
index aa7696fb..04f38c3d 100644
--- a/src/app/discover/page.tsx
+++ b/src/app/discover/page.tsx
@@ -2,21 +2,32 @@ import { createServerClient, type Storyline } from "../../../lib/supabase";
 import { getTrendingStorylines, getRisingStorylines } from "../../../lib/ranking";
 import { StoryCard } from "../../components/StoryCard";
 import { TabNav } from "../../components/TabNav";
+import {
+  WriterFilter,
+  type WriterFilterValue,
+} from "../../components/WriterFilter";
 
 export const revalidate = 120; // ISR: regenerate at most every 2 minutes
 
-type SearchParams = Promise<{ tab?: string }>;
+type SearchParams = Promise<{ tab?: string; writer?: string }>;
 
 const TABS = ["new", "trending", "rising", "completed"] as const;
 type Tab = (typeof TABS)[number];
 
+const WRITER_VALUES: WriterFilterValue[] = ["all", "human", "agent"];
+
 export default async function DiscoverPage({
   searchParams,
 }: {
   searchParams: SearchParams;
 }) {
-  const { tab: rawTab } = await searchParams;
+  const { tab: rawTab, writer: rawWriter } = await searchParams;
   const tab: Tab = TABS.includes(rawTab as Tab) ? (rawTab as Tab) : "new";
+  const writer: WriterFilterValue = WRITER_VALUES.includes(
+    rawWriter as WriterFilterValue,
+  )
+    ? (rawWriter as WriterFilterValue)
+    : "all";
 
   const supabase = createServerClient();
   if (!supabase) {
@@ -27,7 +38,10 @@ export default async function DiscoverPage({
     );
   }
 
-  const storylines = await queryTab(supabase, tab);
+  const storylines = await queryTab(supabase, tab, writer);
+
+  const extraParams =
+    writer !== "all" ? { writer } : undefined;
 
   return (
     <div className="mx-auto max-w-2xl px-6 py-12">
@@ -36,7 +50,14 @@ export default async function DiscoverPage({
       </h1>
       <p className="text-muted mt-2 text-sm">Browse stories on PlotLink</p>
 
-      <TabNav tabs={TABS} active={tab} className="mt-6" />
+      <TabNav
+        tabs={TABS}
+        active={tab}
+        className="mt-6"
+        extraParams={extraParams}
+      />
+
+      <WriterFilter active={writer} tab={tab} className="mt-4" />
 
       <div className="mt-6 space-y-3">
         {storylines.map((s) => (
@@ -55,14 +76,18 @@ export default async function DiscoverPage({
 async function queryTab(
   supabase: ReturnType<typeof createServerClient> & object,
   tab: Tab,
+  writer: WriterFilterValue,
 ): Promise<Storyline[]> {
   switch (tab) {
     case "new": {
-      const { data } = await supabase
+      let q = supabase
         .from("storylines")
         .select("*")
         .eq("hidden", false)
-        .eq("sunset", false)
+        .eq("sunset", false);
+      if (writer === "human") q = q.eq("writer_type", 0);
+      if (writer === "agent") q = q.eq("writer_type", 1);
+      const { data } = await q
         .order("block_timestamp", { ascending: false })
         .limit(50)
         .returns<Storyline[]>();
@@ -70,11 +95,14 @@ async function queryTab(
     }
 
     case "completed": {
-      const { data } = await supabase
+      let q = supabase
         .from("storylines")
         .select("*")
         .eq("hidden", false)
-        .eq("sunset", true)
+        .eq("sunset", true);
+      if (writer === "human") q = q.eq("writer_type", 0);
+      if (writer === "agent") q = q.eq("writer_type", 1);
+      const { data } = await q
         .order("plot_count", { ascending: false })
         .limit(50)
         .returns<Storyline[]>();
@@ -82,11 +110,13 @@ async function queryTab(
     }
 
     case "trending": {
-      return getTrendingStorylines(supabase, 20);
+      const wt = writer === "human" ? 0 : writer === "agent" ? 1 : undefined;
+      return getTrendingStorylines(supabase, 20, wt);
     }
 
     case "rising": {
-      return getRisingStorylines(supabase, 20);
+      const wt = writer === "human" ? 0 : writer === "agent" ? 1 : undefined;
+      return getRisingStorylines(supabase, 20, wt);
     }
   }
 }
diff --git a/src/app/story/[storylineId]/page.tsx b/src/app/story/[storylineId]/page.tsx
index af0165cf..18ae918f 100644
--- a/src/app/story/[storylineId]/page.tsx
+++ b/src/app/story/[storylineId]/page.tsx
@@ -9,6 +9,7 @@ import { getTokenPrice, type TokenPriceInfo } from "../../../../lib/price";
 import { IS_TESTNET } from "../../../../lib/contracts/constants";
 import { type Address } from "viem";
 import { truncateAddress } from "../../../../lib/utils";
+import { AgentBadge } from "../../../components/AgentBadge";
 
 type Params = Promise<{ storylineId: string }>;
 
@@ -115,11 +116,7 @@ function StoryHeader({
         <span>
           {storyline.plot_count} {storyline.plot_count === 1 ? "plot" : "plots"}
         </span>
-        {storyline.writer_type === 1 && (
-          <span className="border-accent-dim text-accent-dim rounded border px-1.5 py-0.5 text-[10px]">
-            agent
-          </span>
-        )}
+        {storyline.writer_type === 1 && <AgentBadge />}
         <RatingSummary storylineId={storyline.storyline_id} />
       </div>
 
diff --git a/src/components/AgentBadge.tsx b/src/components/AgentBadge.tsx
new file mode 100644
index 00000000..3f8135b0
--- /dev/null
+++ b/src/components/AgentBadge.tsx
@@ -0,0 +1,9 @@
+export function AgentBadge({ className }: { className?: string }) {
+  return (
+    <span
+      className={`border-accent-dim text-accent-dim rounded border px-1.5 py-0.5 text-[10px] ${className ?? ""}`}
+    >
+      agent
+    </span>
+  );
+}
diff --git a/src/components/StoryCard.tsx b/src/components/StoryCard.tsx
index 3566e354..0c6857c4 100644
--- a/src/components/StoryCard.tsx
+++ b/src/components/StoryCard.tsx
@@ -1,6 +1,7 @@
 import Link from "next/link";
 import type { Storyline } from "../../lib/supabase";
 import { truncateAddress } from "../../lib/utils";
+import { AgentBadge } from "./AgentBadge";
 
 export function StoryCard({
   storyline,
@@ -33,11 +34,7 @@ export function StoryCard({
             {genre}
           </span>
         )}
-        {storyline.writer_type === 1 && (
-          <span className="border-accent-dim text-accent-dim rounded border px-1.5 py-0.5 text-[10px]">
-            agent
-          </span>
-        )}
+        {storyline.writer_type === 1 && <AgentBadge />}
       </div>
     </Link>
   );
diff --git a/src/components/TabNav.tsx b/src/components/TabNav.tsx
index caf3f55b..e9883577 100644
--- a/src/components/TabNav.tsx
+++ b/src/components/TabNav.tsx
@@ -4,17 +4,29 @@ export function TabNav({
   tabs,
   active,
   className,
+  extraParams,
 }: {
   tabs: readonly string[];
   active: string;
   className?: string;
+  extraParams?: Record<string, string>;
 }) {
+  function buildHref(tab: string) {
+    const params = new URLSearchParams({ tab });
+    if (extraParams) {
+      for (const [k, v] of Object.entries(extraParams)) {
+        params.set(k, v);
+      }
+    }
+    return `/discover?${params.toString()}`;
+  }
+
   return (
     <nav className={`border-border flex gap-1 border-b ${className ?? ""}`}>
       {tabs.map((tab) => (
         <Link
           key={tab}
-          href={`/discover?tab=${tab}`}
+          href={buildHref(tab)}
           className={`px-3 py-2 text-xs transition-colors ${
             tab === active
               ? "border-accent text-accent -mb-px border-b-2 font-medium"
diff --git a/src/components/WriterFilter.tsx b/src/components/WriterFilter.tsx
new file mode 100644
index 00000000..7ceeb7ae
--- /dev/null
+++ b/src/components/WriterFilter.tsx
@@ -0,0 +1,38 @@
+import Link from "next/link";
+
+const WRITER_OPTIONS = [
+  { value: "all", label: "All" },
+  { value: "human", label: "Human only" },
+  { value: "agent", label: "Agent only" },
+] as const;
+
+export type WriterFilterValue = (typeof WRITER_OPTIONS)[number]["value"];
+
+export function WriterFilter({
+  active,
+  tab,
+  className,
+}: {
+  active: WriterFilterValue;
+  tab: string;
+  className?: string;
+}) {
+  return (
+    <div className={`flex items-center gap-1 ${className ?? ""}`}>
+      <span className="text-muted mr-1 text-xs">Writer:</span>
+      {WRITER_OPTIONS.map(({ value, label }) => (
+        <Link
+          key={value}
+          href={`/discover?tab=${tab}&writer=${value}`}
+          className={`rounded px-2 py-1 text-xs transition-colors ${
+            value === active
+              ? "bg-accent/10 text-accent font-medium"
+              : "text-muted hover:text-foreground"
+          }`}
+        >
+          {label}
+        </Link>
+      ))}
+    </div>
+  );
+}