diff --git a/apps/web/app/(authed)/projects/page.tsx b/apps/web/app/(authed)/projects/page.tsx
index 2a6f1c1..7ebd91b 100644
--- a/apps/web/app/(authed)/projects/page.tsx
+++ b/apps/web/app/(authed)/projects/page.tsx
@@ -1,8 +1,9 @@
 import Link from "next/link";
-import { and, desc, eq, isNull, sql } from "drizzle-orm";
+import { and, desc, eq, inArray, isNull, sql } from "drizzle-orm";
 import { auth } from "@/auth";
 import { db } from "@/lib/db/client";
 import { memories, projects } from "@/lib/db/schema";
+import { getAccessibleProjects, getUserGroupNames } from "@/lib/access";
 import { Container, PageHeader } from "@/app/_components/ui/container";
 import { Card } from "@/app/_components/ui/card";
 import { Badge } from "@/app/_components/ui/badge";
@@ -13,24 +14,37 @@ export const dynamic = "force-dynamic";
 export default async function ProjectsPage() {
   const session = await auth();
   const userId = session!.user.id;
+  const groupNames = await getUserGroupNames(userId);
 
-  const rows = await db
-    .select({
-      id: projects.id,
-      key: projects.key,
-      displayName: projects.displayName,
-      createdAt: projects.createdAt,
-      memoryCount: sql<number>`count(${memories.id})::int`,
-      lastActivity: sql<Date | null>`max(${memories.createdAt})`,
-    })
-    .from(projects)
-    .leftJoin(
-      memories,
-      and(eq(memories.projectId, projects.id), isNull(memories.deletedAt)),
-    )
-    .where(eq(projects.userId, userId))
-    .groupBy(projects.id)
-    .orderBy(desc(sql`max(${memories.createdAt})`));
+  // The project list is owned ∪ shared: projects the user owns PLUS
+  // projects shared with one of their groups (any access). Visibility was
+  // previously owner-only (`eq(projects.userId, userId)`), which hid
+  // projects another user shared in via project_shares even though
+  // project.identify already reported them as {shared, access}.
+  const accessible = await getAccessibleProjects(userId, groupNames);
+  const accessById = new Map(accessible.map((p) => [p.projectId, p.access]));
+  const accessibleIds = accessible.map((p) => p.projectId);
+
+  const rows =
+    accessibleIds.length === 0
+      ? []
+      : await db
+          .select({
+            id: projects.id,
+            key: projects.key,
+            displayName: projects.displayName,
+            createdAt: projects.createdAt,
+            memoryCount: sql<number>`count(${memories.id})::int`,
+            lastActivity: sql<Date | null>`max(${memories.createdAt})`,
+          })
+          .from(projects)
+          .leftJoin(
+            memories,
+            and(eq(memories.projectId, projects.id), isNull(memories.deletedAt)),
+          )
+          .where(inArray(projects.id, accessibleIds))
+          .groupBy(projects.id)
+          .orderBy(desc(sql`max(${memories.createdAt})`));
 
   return (
     <Container className="pt-6">
@@ -57,6 +71,9 @@ export default async function ProjectsPage() {
                   <div className="flex items-center gap-2">
                     <span className="font-mono text-sm text-fg truncate">{p.key}</span>
                     <Badge>{p.memoryCount}</Badge>
+                    {accessById.get(p.id) !== "owner" ? (
+                      <Badge tone="accent">shared · {accessById.get(p.id)}</Badge>
+                    ) : null}
                   </div>
                   {p.displayName && p.displayName !== p.key ? (
                     <div className="text-xs text-fg-muted truncate mt-0.5">{p.displayName}</div>
diff --git a/apps/web/lib/mcp/tools.ts b/apps/web/lib/mcp/tools.ts
index 0ec4e00..6e4e8ac 100644
--- a/apps/web/lib/mcp/tools.ts
+++ b/apps/web/lib/mcp/tools.ts
@@ -1,4 +1,4 @@
-import { and, desc, eq, inArray, isNull, or, sql } from "drizzle-orm";
+import { and, arrayContains, desc, eq, inArray, isNull, or } from "drizzle-orm";
 import { db } from "@/lib/db/client";
 import {
   memories,
@@ -465,7 +465,13 @@ const memoryList: ToolDef = {
     }
 
     if (parsed.data.tags && parsed.data.tags.length > 0) {
-      where.push(sql`${memories.tags} @> ${parsed.data.tags}::text[]`);
+      // Require ALL listed tags (array containment). Use Drizzle's
+      // arrayContains so the JS array binds as a single text[] param
+      // (via the column's toDriver) rather than being expanded into
+      // positional params — a raw `${tags}::text[]` template expands to
+      // `($1)::text[]` / `($1,$2)::text[]`, which Postgres rejects as a
+      // malformed array literal / record cast.
+      where.push(arrayContains(memories.tags, parsed.data.tags));
     }
 
     const rows = await db
diff --git a/apps/web/lib/snippets.ts b/apps/web/lib/snippets.ts
index 668aab8..4fba1a7 100644
--- a/apps/web/lib/snippets.ts
+++ b/apps/web/lib/snippets.ts
@@ -1,4 +1,4 @@
-import { and, desc, eq, inArray, isNull, or, sql } from "drizzle-orm";
+import { and, arrayContains, desc, eq, inArray, isNull, or } from "drizzle-orm";
 import { db } from "@/lib/db/client";
 import { snippets, projects } from "@/lib/db/schema";
 import type { Snippet } from "@/lib/db/schema";
@@ -349,7 +349,13 @@ export async function listSnippets(
   }
 
   if (tags && tags.length > 0) {
-    where.push(sql`${snippets.tags} @> ${tags}::text[]`);
+    // Require ALL listed tags (array containment). Use Drizzle's
+    // arrayContains so the JS array binds as a single text[] param
+    // (via the column's toDriver) rather than being expanded into
+    // positional params — a raw `${tags}::text[]` template expands to
+    // `($1)::text[]` / `($1,$2)::text[]`, which Postgres rejects as a
+    // malformed array literal / record cast.
+    where.push(arrayContains(snippets.tags, tags));
   }
 
   const rows = await db