feat: plugin filters by type, paged browse, hide plugins needing newer termix

src/backend/plugins/manage.ts

@@ -34,6 +34,7 @@ import {
 } from "./paths.js";
 import {
   OFFICIAL_REGISTRY_ID,
+  canRunRelease,
   downloadRelease,
   fetchRegistryIndex,
   channelReleases,
@@ -42,6 +43,7 @@ import {
   getRegistryStatus,
   isApiCompatible,
   latestOnChannel,
+  neededTermix,
   officialSource,
   parsePluginChannel,
   type PluginChannel,
@@ -257,10 +259,13 @@ export interface RegistryListing {
     videoId?: string;
     features: string[];
     docs?: string;
+    contributes: string[];
     versions: Array<{
       version: string;
       prerelease: boolean;
       compatible: boolean;
+      /** The Termix range this version needs, when this build is too old. */
+      needsTermix: string | null;
       capabilities: string[];
       publishedAt?: string;
       releaseNotesUrl?: string;
@@ -396,7 +401,7 @@ export async function listRegistry(
       const channel = channelOf(record);
       const latest = latestOnChannel(plugin, channel);
       const latestBeta =
-        plugin.prereleases.find((entry) => isApiCompatible(entry.api)) ?? null;
+        plugin.prereleases.find((entry) => canRunRelease(entry)) ?? null;
       const installedVersion =
         live?.manifest.version ?? record?.version ?? null;
       const updateAvailable = Boolean(
@@ -419,10 +424,12 @@ export async function listRegistry(
         videoId: plugin.videoId,
         features: plugin.features,
         docs: plugin.docs,
+        contributes: plugin.contributes,
         versions: channelReleases(plugin, "beta").map((entry) => ({
           version: entry.version,
           prerelease: Boolean(entry.prerelease),
-          compatible: isApiCompatible(entry.api),
+          compatible: canRunRelease(entry),
+          needsTermix: neededTermix(entry),
           capabilities: entry.capabilities,
           publishedAt: entry.publishedAt,
           releaseNotesUrl: entry.releaseNotesUrl,
@@ -902,9 +909,12 @@ async function requireRelease(
       "NOT_IN_REGISTRY",
     );
   }
-  if (!isApiCompatible(found.release.api)) {
+  if (!canRunRelease(found.release)) {
+    const termix = neededTermix(found.release);
     throw new PluginManageError(
-      `${pluginId} ${found.release.version} does not run on this version of Termix`,
+      termix
+        ? `${pluginId} ${found.release.version} needs Termix ${termix}`
+        : `${pluginId} ${found.release.version} does not run on this version of Termix`,
       409,
       "INCOMPATIBLE",
     );
@@ -1502,6 +1512,14 @@ function validateUpload(buffer: Buffer): PluginManifest {
       "INCOMPATIBLE",
     );
   }
+  const termix = neededTermix({ engine: manifest.engine });
+  if (termix) {
+    throw new PluginManageError(
+      `${manifest.id} ${manifest.version} needs Termix ${termix}`,
+      409,
+      "INCOMPATIBLE",
+    );
+  }
   return manifest;
 }
 

src/backend/plugins/registry-index.ts

@@ -15,11 +15,14 @@ import fs from "node:fs";
 import path from "node:path";
 import semver from "semver";
 import {
+  isApiCompatible as satisfiesPluginApi,
+  isTermixCompatible,
   pluginDocsUrl,
   pluginFeatures,
   SUPPORTED_PLUGIN_API_VERSION,
   youtubeVideoId,
 } from "@termix-ssh/plugin-sdk/manifest";
+import { getLocalVersion } from "../utils/app-version.js";
 import { safeOutboundFetch } from "../utils/safe-outbound-fetch.js";
 import { pluginLogger } from "../utils/logger.js";
 import {
@@ -59,7 +62,10 @@ const ID_PATTERN = /^[a-z0-9][a-z0-9-]*$/;
 
 export interface RegistryVersion {
   version: string;
+  /** The API major, all that builds before engine ranges read. */
   api: string;
+  /** The manifest's engine ranges, when the index lists them. */
+  engine?: { api: string; termix: string };
   url: string;
   sha256: string;
   signature: string;
@@ -92,6 +98,8 @@ export interface RegistryPlugin {
   features: string[];
   /** https docs link from the index. */
   docs?: string;
+  /** The manifest's contributes keys, like layouts, themes or tabs. */
+  contributes: string[];
   /** Stable releases, newest first. */
   versions: RegistryVersion[];
   /**
@@ -149,6 +157,9 @@ function parseVersion(raw: unknown): RegistryVersion | null {
     return null;
   }
   if (!/^[a-f0-9]{64}$/i.test(sha256)) return null;
+  const engine = entry.engine as Record<string, unknown> | undefined;
+  const engineApi = asString(engine?.api);
+  const engineTermix = asString(engine?.termix);
   try {
     if (new URL(url).protocol !== "https:") return null;
   } catch {
@@ -157,6 +168,9 @@ function parseVersion(raw: unknown): RegistryVersion | null {
   return {
     version,
     api: asString(entry.api) ?? "",
+    ...(engineApi && engineTermix
+      ? { engine: { api: engineApi, termix: engineTermix } }
+      : {}),
     url,
     sha256: sha256.toLowerCase(),
     signature,
@@ -191,11 +205,15 @@ export function parseRegistryIndex(raw: unknown): RegistryIndex {
         .map(parseVersion)
         .filter((v): v is RegistryVersion => v !== null)
         .sort((a, b) => semver.rcompare(a.version, b.version));
-    const versions = parseList(entry.versions).filter(
-      (v) => !semver.prerelease(v.version),
-    );
-    const prereleases = parseList(entry.prereleases)
+    // gated holds releases that need a newer Termix than builds which skip
+    // the engine.termix check, so only builds that check it read the list.
+    const gated = parseList(entry.gated);
+    const versions = [...parseList(entry.versions), ...gated]
+      .filter((v) => !semver.prerelease(v.version))
+      .sort((a, b) => semver.rcompare(a.version, b.version));
+    const prereleases = [...parseList(entry.prereleases), ...gated]
       .filter((v) => semver.prerelease(v.version))
+      .sort((a, b) => semver.rcompare(a.version, b.version))
       .map((v) => ({ ...v, prerelease: true }));
     if (versions.length === 0 && prereleases.length === 0) continue;
     plugins.push({
@@ -209,6 +227,14 @@ export function parseRegistryIndex(raw: unknown): RegistryIndex {
       videoId: youtubeVideoId(entry.video) ?? undefined,
       features: pluginFeatures(entry.features),
       docs: pluginDocsUrl(entry.docs) ?? undefined,
+      contributes: Array.isArray(entry.contributes)
+        ? entry.contributes
+            .filter(
+              (kind): kind is string =>
+                typeof kind === "string" && /^[A-Za-z]+$/.test(kind),
+            )
+            .slice(0, 50)
+        : [],
       versions,
       prereleases,
     });
@@ -229,6 +255,29 @@ export function isApiCompatible(api: string): boolean {
   return major !== undefined && String(major) === SUPPORTED_PLUGIN_API_VERSION;
 }
 
+/**
+ * The Termix range a release needs when this build is too old for it, or
+ * null when this build satisfies it.
+ */
+export function neededTermix(
+  release: Pick<RegistryVersion, "engine">,
+): string | null {
+  const range = release.engine?.termix;
+  if (!range) return null;
+  return isTermixCompatible(range, getLocalVersion()) ? null : range;
+}
+
+/** Whether this build can run a release: its API and its engine ranges. */
+export function canRunRelease(
+  release: Pick<RegistryVersion, "api" | "engine">,
+): boolean {
+  if (!isApiCompatible(release.api)) return false;
+  if (!release.engine) return true;
+  return (
+    satisfiesPluginApi(release.engine.api) && neededTermix(release) === null
+  );
+}
+
 /** Follows redirects by hand so each hop still gets the outbound checks. */
 async function fetchFollowing(url: string): Promise<Response> {
   let current = url;
@@ -427,9 +476,8 @@ export function latestOnChannel(
   channel: PluginChannel,
 ): RegistryVersion | null {
   return (
-    channelReleases(plugin, channel).find((entry) =>
-      isApiCompatible(entry.api),
-    ) ?? null
+    channelReleases(plugin, channel).find((entry) => canRunRelease(entry)) ??
+    null
   );
 }
 
@@ -486,9 +534,12 @@ export async function downloadRelease(
   release: RegistryVersion,
   keys: readonly TrustedPluginKey[] = TRUSTED_PLUGIN_KEYS,
 ): Promise<{ file: string; signatureFile: string }> {
-  if (!isApiCompatible(release.api)) {
+  if (!canRunRelease(release)) {
+    const termix = neededTermix(release);
     throw new Error(
-      `${pluginId} ${release.version} needs plugin API ${release.api}, this build runs ${SUPPORTED_PLUGIN_API_VERSION}`,
+      termix
+        ? `${pluginId} ${release.version} needs Termix ${termix}, this is ${getLocalVersion()}`
+        : `${pluginId} ${release.version} needs plugin API ${release.engine?.api ?? release.api}, this build runs ${SUPPORTED_PLUGIN_API_VERSION}`,
     );
   }
 

src/backend/tests/plugins/registry-index.test.ts

@@ -12,6 +12,10 @@ vi.mock("../../utils/safe-outbound-fetch.js", () => ({
   safeOutboundFetch: fetchMock,
 }));
 
+vi.mock("../../utils/app-version.js", () => ({
+  getLocalVersion: () => "26.10.3",
+}));
+
 vi.mock("../../plugins/trust.js", async (importOriginal) => {
   const actual =
     await importOriginal<typeof import("../../plugins/trust.js")>();
@@ -44,7 +48,9 @@ import {
   findRelease,
   latestOnChannel,
   getStatsUrl,
+  canRunRelease,
   isApiCompatible,
+  neededTermix,
   parseRegistryIndex,
   parseRegistryStats,
   resetRegistryCache,
@@ -239,6 +245,56 @@ describe("findRelease", () => {
   });
 });
 
+describe("engine ranges", () => {
+  const engine = (termix: string, api = "^1.0") => ({ api, termix });
+
+  it("reads gated releases into versions and prereleases", () => {
+    const index = parseRegistryIndex({
+      plugins: [
+        {
+          id: "classic-layout",
+          versions: [],
+          gated: [
+            version({ version: "1.1.0-beta.1", engine: engine(">=26.10.3") }),
+            version({ version: "1.0.0", engine: engine(">=26.10.3") }),
+          ],
+          contributes: ["layouts", "tabs", "not valid"],
+        },
+      ],
+    });
+    const [plugin] = index.plugins;
+    expect(plugin.versions.map((v) => v.version)).toEqual(["1.0.0"]);
+    expect(plugin.prereleases.map((v) => v.version)).toEqual(["1.1.0-beta.1"]);
+    expect(plugin.contributes).toEqual(["layouts", "tabs"]);
+  });
+
+  it("checks engine.termix and the full engine.api", () => {
+    expect(canRunRelease(version({ engine: engine(">=26.10.3") }))).toBe(true);
+    expect(canRunRelease(version({ engine: engine(">=26.11.0") }))).toBe(false);
+    expect(neededTermix(version({ engine: engine(">=26.11.0") }))).toBe(
+      ">=26.11.0",
+    );
+    expect(neededTermix(version({ engine: engine(">=26.10.0") }))).toBeNull();
+    expect(
+      canRunRelease(version({ engine: engine(">=26.10.0", "^1.99") })),
+    ).toBe(false);
+    expect(canRunRelease(version())).toBe(true);
+  });
+
+  it("skips a release this build is too old for", () => {
+    const index = parseRegistryIndex({
+      plugins: [
+        {
+          id: "docker",
+          versions: [version({ version: "1.0.0" })],
+          gated: [version({ version: "1.1.0", engine: engine(">=26.11.0") })],
+        },
+      ],
+    });
+    expect(findRelease(index, "docker")?.release.version).toBe("1.0.0");
+  });
+});
+
 describe("prereleases", () => {
   const index = parseRegistryIndex({
     plugins: [

src/ui/api/plugins-api.ts

@@ -308,6 +308,8 @@ export interface RegistryPluginVersion {
   /** A beta, offered only to plugins on the beta channel. */
   prerelease?: boolean;
   compatible: boolean;
+  /** The Termix range this version needs, when this build is too old. */
+  needsTermix?: string | null;
   capabilities: string[];
   publishedAt?: string;
   releaseNotesUrl?: string;
@@ -332,6 +334,8 @@ export interface RegistryPluginEntry {
   videoId?: string;
   features?: string[];
   docs?: string;
+  /** The manifest's contributes keys, like layouts or themes. */
+  contributes?: string[];
   versions: RegistryPluginVersion[];
   /** Newest release on the plugin's channel. */
   latestVersion: string | null;

src/ui/locales/en.json

@@ -1490,7 +1490,6 @@
       "noServerAccess": "No access to your servers",
       "searchInstalled": "Search installed",
       "searchPlugins": "Search plugins",
-      "allCategories": "All",
       "nothingMatches": "Nothing matches that.",
       "noneInstalled": "No plugins installed yet. Browse to add some.",
       "nothingHere": "Nothing here.",
@@ -1580,7 +1579,44 @@
       "documentation": "Documentation",
       "envVars": "Environment variables",
       "envRequired": "Required",
-      "envDefault": "Default: {{value}}"
+      "envDefault": "Default: {{value}}",
+      "kinds": {
+        "layouts": "Layouts",
+        "themes": "Themes",
+        "tabs": "Tabs",
+        "panels": "Sidebar panels",
+        "dashboardCards": "Dashboard cards",
+        "protocols": "Connection types",
+        "auth": "Sign in methods",
+        "actions": "Actions",
+        "hostCapability": "Host settings"
+      },
+      "filters": {
+        "type": "Type",
+        "allTypes": "All types",
+        "category": "Category",
+        "allCategories": "All categories",
+        "results_one": "{{count}} plugin",
+        "results_other": "{{count}} plugins",
+        "remove": "Remove filter {{name}}",
+        "clear": "Clear filters",
+        "button": "Filters",
+        "buttonCount": "Filters ({{count}})"
+      },
+      "pager": {
+        "range": "{{from}}-{{to}} of {{total}}",
+        "page": "Page {{page}} of {{pages}}",
+        "previous": "Previous page",
+        "next": "Next page",
+        "perPage": "{{count}} per page",
+        "perPageLabel": "Plugins per page"
+      },
+      "showUnsupportedHint": "These are listed but no release runs on this version yet. Update Termix to install them.",
+      "unsupported": "Needs a newer Termix",
+      "unsupportedHint": "No release of this plugin runs on this version of Termix. Update Termix to install it.",
+      "needsTermix": "Needs Termix {{range}}",
+      "showUnsupported": "Show unsupported ({{count}})",
+      "showMore": "Show {{count}} more ({{total}} left)"
     }
   },
   "settings": {

src/ui/plugins/PluginDetail.tsx

@@ -199,6 +199,17 @@ export function PluginDetail({
                 </Button>
               )}
             </>
+          ) : plugin.unsupported ? (
+            <span
+              className="text-xs text-muted-foreground"
+              title={t("plugins.manager.unsupportedHint")}
+            >
+              {plugin.needsTermix
+                ? t("plugins.manager.needsTermix", {
+                    range: plugin.needsTermix,
+                  })
+                : t("plugins.manager.unsupported")}
+            </span>
           ) : (
             <Button
               variant="outline"

src/ui/plugins/PluginsTab.tsx

@@ -1,12 +1,15 @@
-import { useEffect, useMemo, useRef, useState } from "react";
+import { useEffect, useRef, useState } from "react";
 import { useTranslation } from "react-i18next";
 import {
   ArrowDownWideNarrow,
   Check,
+  ChevronLeft,
+  ChevronRight,
   Columns3,
   Download,
   Globe,
   Library,
+  ListFilter,
   Puzzle,
   RefreshCw,
   RotateCcw,
@@ -14,6 +17,7 @@ import {
   Trash2,
   TriangleAlert,
   Upload,
+  X,
 } from "lucide-react";
 import { Button } from "@/components/button";
 import { Card } from "@/components/card";
@@ -53,10 +57,13 @@ import {
   categoriesOf,
   describeContributions,
   isSevere,
+  kindsOf,
   matchesQuery,
   orderByRisk,
+  pageOf,
   sortPlugins,
   type PluginEntry,
+  type PluginKind,
   type SortKey,
 } from "./plugin-model";
 import { usePluginsManager, type PluginsManager } from "./use-plugins-manager";
@@ -190,7 +197,7 @@ function PluginsTabBody() {
           />
         }
       >
-        <div className="min-h-0 flex-1 overflow-y-auto thin-scrollbar">
+        <div className="flex min-h-0 flex-1 flex-col">
           {manager.managedByServer && (
             <Notice>{t("plugins.manager.managedByServer")}</Notice>
           )}
@@ -225,14 +232,18 @@ function PluginsTabBody() {
               layout={layout}
               layoutControls={layoutControls}
             />
-          ) : section === "updates" ? (
-            <UpdatesSection
-              plugins={updates}
-              manager={manager}
-              onOpen={setDetailId}
-            />
           ) : (
-            <RegistriesSection manager={manager} />
+            <div className="min-h-0 flex-1 overflow-y-auto thin-scrollbar">
+              {section === "updates" ? (
+                <UpdatesSection
+                  plugins={updates}
+                  manager={manager}
+                  onOpen={setDetailId}
+                />
+              ) : (
+                <RegistriesSection manager={manager} />
+              )}
+            </div>
           )}
         </div>
       </PanelShell>
@@ -313,7 +324,7 @@ function Toolbar({
 }) {
   return (
     <div className="flex flex-wrap items-center gap-2">
-      <div className="relative min-w-40 max-w-xs flex-1">
+      <div className="relative min-w-40 max-w-md flex-1">
         <Search className="pointer-events-none absolute left-2.5 top-1/2 size-3.5 -translate-y-1/2 text-muted-foreground" />
         <Input
           value={query}
@@ -470,6 +481,368 @@ function stop(e: React.MouseEvent) {
   e.stopPropagation();
 }
 
+interface Facets {
+  kind: PluginKind | null;
+  category: string | null;
+  registry: string | null;
+}
+
+const NO_FACETS: Facets = { kind: null, category: null, registry: null };
+
+/** Rows that pass every facet but `skip`, so a group counts what picking it would show. */
+function applyFacets(
+  rows: PluginEntry[],
+  facets: Facets,
+  skip?: keyof Facets,
+): PluginEntry[] {
+  return rows.filter(
+    (p) =>
+      (skip === "kind" || !facets.kind || p.kinds.includes(facets.kind)) &&
+      (skip === "category" ||
+        !facets.category ||
+        p.category === facets.category) &&
+      (skip === "registry" ||
+        !facets.registry ||
+        p.registryId === facets.registry),
+  );
+}
+
+function activeFacets(facets: Facets): number {
+  return [facets.kind, facets.category, facets.registry].filter(Boolean).length;
+}
+
+const PAGE_SIZES = ["24", "48", "96"] as const;
+type PageSize = (typeof PAGE_SIZES)[number];
+
+/** A page number that goes back to 1 whenever what is listed changes. */
+function usePage(signature: string) {
+  const [state, setState] = useState({ signature, page: 1 });
+  const page = state.signature === signature ? state.page : 1;
+  return [page, (next: number) => setState({ signature, page: next })] as const;
+}
+
+function FacetGroup<T extends string>({
+  title,
+  allLabel,
+  options,
+  value,
+  onChange,
+}: {
+  title: string;
+  allLabel: string;
+  options: Array<{ value: T; label: string; count: number }>;
+  value: T | null;
+  onChange: (next: T | null) => void;
+}) {
+  if (options.length === 0) return null;
+  const row = (key: T | null, label: string, count?: number) => {
+    const active = value === key;
+    return (
+      <button
+        key={key ?? "__all"}
+        type="button"
+        aria-pressed={active}
+        onClick={() => onChange(key)}
+        className={cn(
+          "flex w-full items-center gap-2 border-l-2 px-2.5 py-1 text-left text-xs transition-colors",
+          active
+            ? "border-accent-brand bg-accent-brand/10 text-accent-brand"
+            : "border-transparent text-muted-foreground hover:bg-muted/50 hover:text-foreground",
+          count === 0 && !active && "opacity-50",
+        )}
+      >
+        <span className="min-w-0 flex-1 truncate">{label}</span>
+        {count !== undefined && (
+          <span className="shrink-0 text-[10px] tabular-nums opacity-70">
+            {count}
+          </span>
+        )}
+      </button>
+    );
+  };
+  return (
+    <div className="flex flex-col gap-0.5">
+      <span className="px-2.5 pb-1 text-[10px] font-semibold uppercase tracking-wide text-muted-foreground/70">
+        {title}
+      </span>
+      {row(null, allLabel)}
+      {options.map((o) => row(o.value, o.label, o.count))}
+    </div>
+  );
+}
+
+function FilterRail({
+  rows,
+  facets,
+  onFacets,
+  registries,
+  children,
+}: {
+  /** What the search and toggles leave, before any facet. */
+  rows: PluginEntry[];
+  facets: Facets;
+  onFacets: (next: Facets) => void;
+  registries?: Array<{ id: string; name: string }>;
+  /** Toggles shown under the groups. */
+  children?: React.ReactNode;
+}) {
+  const { t } = useTranslation();
+  const byKind = applyFacets(rows, facets, "kind");
+  const kinds = kindsOf(rows).map(({ kind }) => ({
+    value: kind,
+    label: t(`plugins.manager.kinds.${kind}`),
+    count: byKind.filter((p) => p.kinds.includes(kind)).length,
+  }));
+  const byCategory = applyFacets(rows, facets, "category");
+  const categories = categoriesOf(rows).map((c) => ({
+    value: c,
+    label: c,
+    count: byCategory.filter((p) => p.category === c).length,
+  }));
+  const byRegistry = applyFacets(rows, facets, "registry");
+  const registryOptions =
+    registries && registries.length > 1
+      ? registries.map((r) => ({
+          value: r.id,
+          label: r.name,
+          count: byRegistry.filter((p) => p.registryId === r.id).length,
+        }))
+      : [];
+  return (
+    <div className="flex flex-col gap-4 py-3">
+      <FacetGroup
+        title={t("plugins.manager.filters.type")}
+        allLabel={t("plugins.manager.filters.allTypes")}
+        options={kinds}
+        value={facets.kind}
+        onChange={(kind) => onFacets({ ...facets, kind })}
+      />
+      <FacetGroup
+        title={t("plugins.manager.filters.category")}
+        allLabel={t("plugins.manager.filters.allCategories")}
+        options={categories}
+        value={facets.category}
+        onChange={(category) => onFacets({ ...facets, category })}
+      />
+      <FacetGroup
+        title={t("plugins.manager.registries.filter")}
+        allLabel={t("plugins.manager.registries.allRegistries")}
+        options={registryOptions}
+        value={facets.registry}
+        onChange={(registry) => onFacets({ ...facets, registry })}
+      />
+      {children && (
+        <div className="flex flex-col gap-2.5 border-t border-border px-2.5 pt-3">
+          {children}
+        </div>
+      )}
+    </div>
+  );
+}
+
+function RailToggle({
+  label,
+  hint,
+  checked,
+  onChange,
+}: {
+  label: string;
+  hint?: string;
+  checked: boolean;
+  onChange: (next: boolean) => void;
+}) {
+  return (
+    <label className="flex items-center justify-between gap-2" title={hint}>
+      <span className="text-xs text-muted-foreground">{label}</span>
+      <FakeSwitch checked={checked} onChange={onChange} />
+    </label>
+  );
+}
+
+/** Chips for the picked facets, so it is clear why the list is short. */
+function ActiveFilters({
+  facets,
+  onFacets,
+  registries,
+  shown,
+}: {
+  facets: Facets;
+  onFacets: (next: Facets) => void;
+  registries?: Array<{ id: string; name: string }>;
+  shown: number;
+}) {
+  const { t } = useTranslation();
+  const chips: Array<{ key: keyof Facets; label: string }> = [];
+  if (facets.kind) {
+    chips.push({
+      key: "kind",
+      label: t(`plugins.manager.kinds.${facets.kind}`),
+    });
+  }
+  if (facets.category) chips.push({ key: "category", label: facets.category });
+  if (facets.registry) {
+    chips.push({
+      key: "registry",
+      label:
+        registries?.find((r) => r.id === facets.registry)?.name ??
+        facets.registry,
+    });
+  }
+  return (
+    <div className="flex min-h-6 flex-wrap items-center gap-1.5">
+      <span className="text-[11px] text-muted-foreground">
+        {t("plugins.manager.filters.results", { count: shown })}
+      </span>
+      {chips.map((chip) => (
+        <button
+          key={chip.key}
+          type="button"
+          onClick={() => onFacets({ ...facets, [chip.key]: null })}
+          className="flex items-center gap-1 border border-accent-brand/40 bg-accent-brand/10 px-1.5 py-0.5 text-[11px] text-accent-brand hover:bg-accent-brand/20"
+          aria-label={t("plugins.manager.filters.remove", {
+            name: chip.label,
+          })}
+        >
+          {chip.label}
+          <X className="size-3" />
+        </button>
+      ))}
+      {chips.length > 1 && (
+        <button
+          type="button"
+          onClick={() => onFacets(NO_FACETS)}
+          className="text-[11px] text-muted-foreground hover:text-foreground"
+        >
+          {t("plugins.manager.filters.clear")}
+        </button>
+      )}
+    </div>
+  );
+}
+
+function Pager({
+  page,
+  pages,
+  total,
+  size,
+  onPage,
+  onSize,
+}: {
+  page: number;
+  pages: number;
+  total: number;
+  size: PageSize;
+  onPage: (next: number) => void;
+  onSize: (next: PageSize) => void;
+}) {
+  const { t } = useTranslation();
+  const per = Number(size);
+  if (total <= Number(PAGE_SIZES[0])) return null;
+  return (
+    <div className="flex flex-wrap items-center gap-2 border-t border-border pt-2.5">
+      <span className="text-[11px] tabular-nums text-muted-foreground">
+        {t("plugins.manager.pager.range", {
+          from: (page - 1) * per + 1,
+          to: Math.min(page * per, total),
+          total,
+        })}
+      </span>
+      <div className="ml-auto flex items-center gap-1.5">
+        <Select value={size} onValueChange={(v) => onSize(v as PageSize)}>
+          <SelectTrigger
+            size="sm"
+            className="w-auto text-xs"
+            aria-label={t("plugins.manager.pager.perPageLabel")}
+          >
+            <SelectValue />
+          </SelectTrigger>
+          <SelectContent>
+            {PAGE_SIZES.map((n) => (
+              <SelectItem key={n} value={n} className="text-xs">
+                {t("plugins.manager.pager.perPage", { count: Number(n) })}
+              </SelectItem>
+            ))}
+          </SelectContent>
+        </Select>
+        <Button
+          variant="outline"
+          size="icon-sm"
+          disabled={page <= 1}
+          onClick={() => onPage(page - 1)}
+          title={t("plugins.manager.pager.previous")}
+          aria-label={t("plugins.manager.pager.previous")}
+        >
+          <ChevronLeft className="size-3.5" />
+        </Button>
+        <span className="px-1 text-[11px] tabular-nums text-muted-foreground">
+          {t("plugins.manager.pager.page", { page, pages })}
+        </span>
+        <Button
+          variant="outline"
+          size="icon-sm"
+          disabled={page >= pages}
+          onClick={() => onPage(page + 1)}
+          title={t("plugins.manager.pager.next")}
+          aria-label={t("plugins.manager.pager.next")}
+        >
+          <ChevronRight className="size-3.5" />
+        </Button>
+      </div>
+    </div>
+  );
+}
+
+/**
+ * Filters in a rail beside the results. A narrow tab folds the rail behind
+ * a Filters button instead.
+ */
+function FilteredLayout({
+  rail,
+  activeCount,
+  scrollRef,
+  children,
+}: {
+  rail: React.ReactNode;
+  activeCount: number;
+  scrollRef?: React.Ref<HTMLDivElement>;
+  children: (filtersButton: React.ReactNode) => React.ReactNode;
+}) {
+  const { t } = useTranslation();
+  const [open, setOpen] = useState(false);
+  const button = (
+    <Button
+      variant="outline"
+      className={cn(
+        "gap-1.5 @3xl:hidden",
+        activeCount > 0 && "border-accent-brand/40 text-accent-brand",
+      )}
+      aria-expanded={open}
+      onClick={() => setOpen((v) => !v)}
+    >
+      <ListFilter className="size-3.5" />
+      {activeCount > 0
+        ? t("plugins.manager.filters.buttonCount", { count: activeCount })
+        : t("plugins.manager.filters.button")}
+    </Button>
+  );
+  return (
+    <div className="@container flex min-h-0 flex-1">
+      <aside className="hidden w-52 shrink-0 overflow-y-auto border-r border-border thin-scrollbar @3xl:block">
+        {rail}
+      </aside>
+      <div
+        ref={scrollRef}
+        className="min-h-0 flex-1 overflow-y-auto thin-scrollbar"
+      >
+        {open && (
+          <div className="border-b border-border @3xl:hidden">{rail}</div>
+        )}
+        {children(button)}
+      </div>
+    </div>
+  );
+}
+
 function InstalledSection({
   plugins,
   manager,
@@ -489,10 +862,9 @@ function InstalledSection({
 }) {
   const { t } = useTranslation();
   const [sort, setSort] = useState<SortKey>("name");
-  const rows = sortPlugins(
-    plugins.filter((p) => matchesQuery(p, query)),
-    sort,
-  );
+  const [facets, setFacets] = useState<Facets>(NO_FACETS);
+  const searched = plugins.filter((p) => matchesQuery(p, query));
+  const rows = sortPlugins(applyFacets(searched, facets), sort);
   const running = rows.filter((p) => p.status === "running");
   const onServer = rows.filter((p) => p.status === "server");
   const stopped = rows.filter(
@@ -554,72 +926,88 @@ function InstalledSection({
   );
 
   return (
-    <div className={`flex flex-col ${PANEL.gap} ${PANEL.body}`}>
-      <Toolbar
-        query={query}
-        onQuery={onQuery}
-        placeholder={t("plugins.manager.searchInstalled")}
-      >
-        <div className="ml-auto flex items-center gap-2">
-          <SortSelect value={sort} onChange={setSort} />
-          {layoutControls}
-          {manager.developerMode && !manager.signedOnly && (
-            <UploadButton manager={manager} />
-          )}
-          <Button
-            variant="outline"
-            className="gap-1.5"
-            disabled={
-              pending.length === 0 ||
-              manager.busy.size > 0 ||
-              manager.managedByServer
-            }
-            onClick={() => void manager.updateAll()}
+    <FilteredLayout
+      activeCount={activeFacets(facets)}
+      rail={<FilterRail rows={searched} facets={facets} onFacets={setFacets} />}
+    >
+      {(filtersButton) => (
+        <div className={`flex flex-col ${PANEL.gap} ${PANEL.body}`}>
+          <Toolbar
+            query={query}
+            onQuery={onQuery}
+            placeholder={t("plugins.manager.searchInstalled")}
           >
-            <Download className="size-3.5" />
-            {t("plugins.manager.updateAll")}
-          </Button>
-        </div>
-      </Toolbar>
+            {filtersButton}
+            <div className="ml-auto flex items-center gap-2">
+              <SortSelect value={sort} onChange={setSort} />
+              {layoutControls}
+              {manager.developerMode && !manager.signedOnly && (
+                <UploadButton manager={manager} />
+              )}
+              <Button
+                variant="outline"
+                className="gap-1.5"
+                disabled={
+                  pending.length === 0 ||
+                  manager.busy.size > 0 ||
+                  manager.managedByServer
+                }
+                onClick={() => void manager.updateAll()}
+              >
+                <Download className="size-3.5" />
+                {t("plugins.manager.updateAll")}
+              </Button>
+            </div>
+          </Toolbar>
 
-      {rows.length === 0 ? (
-        <EmptyState
-          icon={Puzzle}
-          title={
-            plugins.length === 0
-              ? t("plugins.manager.noneInstalled")
-              : t("plugins.manager.nothingMatches")
-          }
-        />
-      ) : (
-        <>
-          {running.length > 0 && (
-            <Group
-              title={t("plugins.manager.groups.running")}
-              count={running.length}
-            >
-              {collection(running)}
-            </Group>
+          {activeFacets(facets) > 0 && (
+            <ActiveFilters
+              facets={facets}
+              onFacets={setFacets}
+              shown={rows.length}
+            />
           )}
-          {onServer.length > 0 && (
-            <Group
-              title={t("plugins.manager.groups.onServer")}
-              count={onServer.length}
-            >
-              {collection(onServer)}
-            </Group>
+
+          {rows.length === 0 ? (
+            <EmptyState
+              icon={Puzzle}
+              title={
+                plugins.length === 0
+                  ? t("plugins.manager.noneInstalled")
+                  : t("plugins.manager.nothingMatches")
+              }
+            />
+          ) : (
+            <>
+              {running.length > 0 && (
+                <Group
+                  title={t("plugins.manager.groups.running")}
+                  count={running.length}
+                >
+                  {collection(running)}
+                </Group>
+              )}
+              {onServer.length > 0 && (
+                <Group
+                  title={t("plugins.manager.groups.onServer")}
+                  count={onServer.length}
+                >
+                  {collection(onServer)}
+                </Group>
+              )}
+              {stopped.length > 0 && (
+                <Group
+                  title={t("plugins.manager.groups.notRunning")}
+                  count={stopped.length}
+                >
+                  {collection(stopped)}
+                </Group>
+              )}
+            </>
           )}
-          {stopped.length > 0 && (
-            <Group
-              title={t("plugins.manager.groups.notRunning")}
-              count={stopped.length}
-            >
-              {collection(stopped)}
-            </Group>
-          )}
-        </>
+        </div>
       )}
-    </div>
+    </FilteredLayout>
   );
 }
 
@@ -953,31 +1341,46 @@ function BrowseSection({
   layoutControls: React.ReactNode;
 }) {
   const { t } = useTranslation();
-  const [category, setCategory] = useState<string | null>(null);
-  const [registry, setRegistry] = useState<string | null>(null);
+  const [facets, setFacets] = useState<Facets>(NO_FACETS);
   const [sort, setSort] = useState<SortKey>("popular");
   const [installedChoice, setInstalledChoice] = useStoredChoice(
     "pluginsTab.browseInstalled",
     ["hide", "show"],
     "hide",
   );
-  const showInstalled = installedChoice === "show";
-  const categories = useMemo(() => categoriesOf(plugins), [plugins]);
-  const registries = manager.registries;
-  const registryFilter = registries.some((entry) => entry.id === registry)
-    ? registry
-    : null;
-
-  const rows = sortPlugins(
-    plugins.filter(
-      (p) =>
-        (showInstalled || !p.installed) &&
-        matchesQuery(p, query) &&
-        (category === null || p.category === category) &&
-        (registryFilter === null || p.registryId === registryFilter),
-    ),
-    sort,
+  const [unsupportedChoice, setUnsupportedChoice] = useStoredChoice(
+    "pluginsTab.browseUnsupported",
+    ["hide", "show"],
+    "hide",
   );
+  const [pageSize, setPageSize] = useStoredChoice<PageSize>(
+    "pluginsTab.pageSize",
+    PAGE_SIZES,
+    "24",
+  );
+  const scroller = useRef<HTMLDivElement>(null);
+  const showInstalled = installedChoice === "show";
+  const showUnsupported = unsupportedChoice === "show";
+  const registries = manager.registries;
+  const unsupportedCount = plugins.filter(
+    (p) => p.unsupported && !p.installed,
+  ).length;
+
+  const searched = plugins.filter(
+    (p) =>
+      (showInstalled || !p.installed) &&
+      (showUnsupported || !p.unsupported || p.installed) &&
+      matchesQuery(p, query),
+  );
+  const rows = sortPlugins(applyFacets(searched, facets), sort);
+  const [page, setPage] = usePage(
+    JSON.stringify([query, facets, sort, showInstalled, showUnsupported]),
+  );
+  const paged = pageOf(rows, page, Number(pageSize));
+  const goTo = (next: number) => {
+    setPage(next);
+    if (scroller.current) scroller.current.scrollTop = 0;
+  };
 
   const allInstalledHidden =
     !showInstalled && plugins.length > 0 && plugins.every((p) => p.installed);
@@ -987,7 +1390,7 @@ function BrowseSection({
       key: "name",
       header: t("plugins.manager.table.name"),
       width: "minmax(0,1.3fr)",
-      cell: (p) => <NameCell plugin={p} />,
+      cell: (p) => <NameCell plugin={p} muted={p.unsupported} />,
     },
     {
       key: "description",
@@ -1029,124 +1432,117 @@ function BrowseSection({
     {
       key: "actions",
       header: "",
-      width: "120px",
+      width: "150px",
       align: "end",
       cell: (p) => <BrowseAction plugin={p} manager={manager} />,
     },
   ];
 
   return (
-    <div className={`flex flex-col ${PANEL.gap} ${PANEL.body}`}>
-      <Toolbar
-        query={query}
-        onQuery={onQuery}
-        placeholder={t("plugins.manager.searchPlugins")}
-      >
-        <div className="ml-auto flex items-center gap-2">
-          <label className="flex items-center gap-1.5">
-            <span className="text-xs text-muted-foreground">
-              {t("plugins.manager.showInstalled")}
-            </span>
-            <FakeSwitch
-              checked={showInstalled}
-              onChange={(v) => setInstalledChoice(v ? "show" : "hide")}
+    <FilteredLayout
+      activeCount={activeFacets(facets)}
+      scrollRef={scroller}
+      rail={
+        <FilterRail
+          rows={searched}
+          facets={facets}
+          onFacets={setFacets}
+          registries={registries}
+        >
+          <RailToggle
+            label={t("plugins.manager.showInstalled")}
+            checked={showInstalled}
+            onChange={(v) => setInstalledChoice(v ? "show" : "hide")}
+          />
+          {unsupportedCount > 0 && (
+            <RailToggle
+              label={t("plugins.manager.showUnsupported", {
+                count: unsupportedCount,
+              })}
+              hint={t("plugins.manager.showUnsupportedHint")}
+              checked={showUnsupported}
+              onChange={(v) => setUnsupportedChoice(v ? "show" : "hide")}
             />
-          </label>
-          {registries.length > 1 && (
-            <Select
-              value={registryFilter ?? "__all"}
-              onValueChange={(v) => setRegistry(v === "__all" ? null : v)}
-            >
-              <SelectTrigger
-                size="sm"
-                className="w-auto gap-1.5 text-xs"
-                aria-label={t("plugins.manager.registries.filter")}
-              >
-                <Library className="size-3.5 text-muted-foreground" />
-                <SelectValue />
-              </SelectTrigger>
-              <SelectContent>
-                <SelectItem value="__all" className="text-xs">
-                  {t("plugins.manager.registries.allRegistries")}
-                </SelectItem>
-                {registries.map((entry) => (
-                  <SelectItem
-                    key={entry.id}
-                    value={entry.id}
-                    className="text-xs"
-                  >
-                    {entry.name}
-                  </SelectItem>
-                ))}
-              </SelectContent>
-            </Select>
           )}
-          <SortSelect value={sort} onChange={setSort} />
-          {layoutControls}
-        </div>
-      </Toolbar>
+        </FilterRail>
+      }
+    >
+      {(filtersButton) => (
+        <div className={`flex flex-col ${PANEL.gap} ${PANEL.body}`}>
+          <Toolbar
+            query={query}
+            onQuery={onQuery}
+            placeholder={t("plugins.manager.searchPlugins")}
+          >
+            {filtersButton}
+            <div className="ml-auto flex items-center gap-2">
+              <SortSelect value={sort} onChange={setSort} />
+              {layoutControls}
+            </div>
+          </Toolbar>
 
-      {categories.length > 0 && (
-        <div className="flex flex-wrap items-center gap-1">
-          {[null, ...categories].map((c) => (
-            <button
-              key={c ?? "__all"}
-              type="button"
-              onClick={() => setCategory(c)}
-              className={cn(
-                "border px-2 py-1 text-[11px] font-medium transition-colors",
-                category === c
-                  ? "border-accent-brand bg-accent-brand/10 text-accent-brand"
-                  : "border-border text-muted-foreground hover:text-foreground",
+          <ActiveFilters
+            facets={facets}
+            onFacets={setFacets}
+            registries={registries}
+            shown={rows.length}
+          />
+
+          {rows.length === 0 ? (
+            allInstalledHidden ? (
+              <EmptyState
+                icon={Puzzle}
+                title={t("plugins.manager.allInstalled")}
+                hint={t("plugins.manager.allInstalledHint")}
+              />
+            ) : (
+              <EmptyState
+                icon={Puzzle}
+                title={t("plugins.manager.nothingHere")}
+                hint={
+                  plugins.length === 0
+                    ? undefined
+                    : t("plugins.manager.nothingHereHint")
+                }
+              />
+            )
+          ) : (
+            <PluginCollection
+              plugins={paged.items}
+              layout={layout}
+              renderCard={(p) => (
+                <BrowseCard
+                  plugin={p}
+                  manager={manager}
+                  onOpen={() => onOpen(p.id)}
+                />
               )}
-            >
-              {c ?? t("plugins.manager.allCategories")}
-            </button>
-          ))}
-        </div>
-      )}
-
-      {rows.length === 0 ? (
-        allInstalledHidden ? (
-          <EmptyState
-            icon={Puzzle}
-            title={t("plugins.manager.allInstalled")}
-            hint={t("plugins.manager.allInstalledHint")}
-          />
-        ) : (
-          <EmptyState
-            icon={Puzzle}
-            title={t("plugins.manager.nothingHere")}
-            hint={
-              plugins.length === 0
-                ? undefined
-                : t("plugins.manager.nothingHereHint")
-            }
-          />
-        )
-      ) : (
-        <PluginCollection
-          plugins={rows}
-          layout={layout}
-          renderCard={(p) => (
-            <BrowseCard
-              plugin={p}
-              manager={manager}
-              onOpen={() => onOpen(p.id)}
+              listColumns={listColumns}
+              onOpen={onOpen}
             />
           )}
-          listColumns={listColumns}
-          onOpen={onOpen}
-        />
-      )}
 
-      <p className="text-[11px] text-muted-foreground">
-        {t("plugins.manager.registries.browseHint")}{" "}
-        <DocsLink core="communityRegistry" className="text-[11px]">
-          {t("plugins.manager.communitySubmit")}
-        </DocsLink>
-      </p>
-    </div>
+          <Pager
+            page={paged.page}
+            pages={paged.pages}
+            total={rows.length}
+            size={pageSize}
+            onPage={goTo}
+            onSize={(next) => {
+              setPageSize(next);
+              goTo(1);
+            }}
+          />
+
+          <p className="text-[11px] text-muted-foreground">
+            {t("plugins.manager.registries.browseHint")}{" "}
+            <DocsLink core="communityRegistry" className="text-[11px]">
+              {t("plugins.manager.communitySubmit")}
+            </DocsLink>
+          </p>
+        </div>
+      )}
+    </FilteredLayout>
   );
 }
 
@@ -1166,6 +1562,7 @@ function BrowseCard({
     <Card className="gap-0 overflow-hidden py-0">
       <CardHead
         plugin={plugin}
+        muted={plugin.unsupported}
         onOpen={onOpen}
         facts={
           <>
@@ -1182,12 +1579,14 @@ function BrowseCard({
       />
       <div className="flex items-center gap-2 border-t border-border px-3 py-2">
         <span className="min-w-0 flex-1 truncate text-[10px] text-muted-foreground">
-          {severe.length > 0
-            ? t(`plugins.capabilities.${severe[0]}.title`, {
-                defaultValue: severe[0],
-                nsSeparator: false,
-              })
-            : t("plugins.manager.noServerAccess")}
+          {plugin.unsupported && !plugin.installed
+            ? ""
+            : severe.length > 0
+              ? t(`plugins.capabilities.${severe[0]}.title`, {
+                  defaultValue: severe[0],
+                  nsSeparator: false,
+                })
+              : t("plugins.manager.noServerAccess")}
         </span>
         <BrowseAction plugin={plugin} manager={manager} />
       </div>
@@ -1215,6 +1614,15 @@ function BrowseAction({
           <Check className="size-3" />
           {t("plugins.manager.installedBadge")}
         </span>
+      ) : plugin.unsupported ? (
+        <span
+          className="shrink-0 text-[11px] text-muted-foreground"
+          title={t("plugins.manager.unsupportedHint")}
+        >
+          {plugin.needsTermix
+            ? t("plugins.manager.needsTermix", { range: plugin.needsTermix })
+            : t("plugins.manager.unsupported")}
+        </span>
       ) : (
         <Button
           variant="outline"

src/ui/plugins/plugin-model.ts

@@ -73,6 +73,12 @@ export interface PluginEntry {
   managedByServer: boolean;
   /** The app is drawn with it by default, so it can be swapped but not uninstalled. */
   defaultLook: boolean;
+  /** Contribution keys from the manifest or the registry, like layouts. */
+  kinds: string[];
+  /** Listed, but no release runs on this build. */
+  unsupported: boolean;
+  /** The Termix range the newest release needs, when this build is too old. */
+  needsTermix: string | null;
 }
 
 export type PluginSource =
@@ -171,6 +177,14 @@ export function mergePlugins(
       registryName: entry?.registryName ?? null,
       managedByServer: summary.managedByServer ?? false,
       defaultLook: summary.defaultLook ?? false,
+      kinds: [
+        ...new Set([
+          ...Object.keys(summary.contributes ?? {}),
+          ...(entry?.contributes ?? []),
+        ]),
+      ],
+      unsupported: false,
+      needsTermix: null,
     });
   }
 
@@ -216,6 +230,12 @@ export function mergePlugins(
       registryName: entry.registryName ?? null,
       managedByServer: false,
       defaultLook: false,
+      kinds: entry.contributes ?? [],
+      unsupported: entry.latestVersion === null,
+      needsTermix:
+        entry.latestVersion === null
+          ? (entry.versions.find((v) => v.needsTermix)?.needsTermix ?? null)
+          : null,
     });
   }
 
@@ -258,6 +278,9 @@ export function uploadEntry(preview: PluginUploadPreview): PluginEntry {
     registryName: null,
     managedByServer: false,
     defaultLook: false,
+    kinds: [],
+    unsupported: false,
+    needsTermix: null,
   };
 }
 
@@ -309,6 +332,46 @@ export function categoriesOf(rows: PluginEntry[]): string[] {
   return [...new Set(rows.map((row) => row.category).filter(Boolean))].sort();
 }
 
+/** Contribution keys worth filtering by, in the order the filter lists them. */
+export const PLUGIN_KINDS = [
+  "layouts",
+  "themes",
+  "tabs",
+  "panels",
+  "dashboardCards",
+  "protocols",
+  "auth",
+  "actions",
+  "hostCapability",
+] as const;
+
+export type PluginKind = (typeof PLUGIN_KINDS)[number];
+
+/** The filterable kinds present in a set of rows, with how many have each. */
+export function kindsOf(
+  rows: PluginEntry[],
+): Array<{ kind: PluginKind; count: number }> {
+  return PLUGIN_KINDS.map((kind) => ({
+    kind,
+    count: rows.filter((row) => row.kinds.includes(kind)).length,
+  })).filter((entry) => entry.count > 0);
+}
+
+/** One page of rows, with the page clamped to what exists. */
+export function pageOf<T>(
+  rows: T[],
+  page: number,
+  size: number,
+): { items: T[]; page: number; pages: number } {
+  const pages = Math.max(1, Math.ceil(rows.length / size));
+  const current = Math.min(Math.max(1, page), pages);
+  return {
+    items: rows.slice((current - 1) * size, current * size),
+    page: current,
+    pages,
+  };
+}
+
 export function capabilityRisk(capability: string): CapabilityRisk {
   return getCapabilityInfo(capability)?.risk ?? "medium";
 }

src/ui/tests/plugins/PluginsTab.test.tsx

@@ -24,12 +24,31 @@ const plugin = {
   versions: [],
   downloads: null,
   managedByServer: false,
+  kinds: [] as string[],
+  category: "",
+  unsupported: false,
+  needsTermix: null as string | null,
 };
 let linked = false;
+let extra: Array<typeof plugin> = [];
+
+function listed(
+  id: string,
+  overrides: Partial<typeof plugin> = {},
+): typeof plugin {
+  return {
+    ...plugin,
+    id,
+    name: `Listed ${id}`,
+    installed: false,
+    status: null as never,
+    ...overrides,
+  };
+}
 
 vi.mock("@/plugins/use-plugins-manager", () => ({
   usePluginsManager: () => ({
-    plugins: [plugin],
+    plugins: [plugin, ...extra],
     loading: false,
     refreshing: false,
     refresh: vi.fn(),
@@ -50,6 +69,7 @@ async function renderTab() {
   await i18n.use(initReactI18next).init({
     lng: "en",
     resources: { en: { translation: en } },
+    interpolation: { escapeValue: false },
   });
   return render(
     <I18nextProvider i18n={i18n}>
@@ -61,6 +81,7 @@ async function renderTab() {
 beforeEach(() => {
   localStorage.clear();
   linked = false;
+  extra = [];
   plugin.managedByServer = false;
 });
 afterEach(cleanup);
@@ -92,6 +113,73 @@ describe("PluginsTab", () => {
     expect(localStorage.getItem("pluginsTab.browseInstalled")).toBe("show");
   });
 
+  it("filters Browse by what a plugin adds", async () => {
+    extra = [
+      listed("layout", { kinds: ["layouts", "tabs"] }),
+      listed("tabs", { kinds: ["tabs"] }),
+    ];
+    await renderTab();
+    fireEvent.click(screen.getByText(en.plugins.manager.tabs.browse));
+    expect(screen.getByText("Listed layout")).toBeTruthy();
+    expect(screen.getByText("Listed tabs")).toBeTruthy();
+
+    const [layoutsFilter] = screen.getAllByRole("button", {
+      name: new RegExp(`^${en.plugins.manager.kinds.layouts}`),
+    });
+    fireEvent.click(layoutsFilter);
+
+    expect(screen.getByText("Listed layout")).toBeTruthy();
+    expect(screen.queryByText("Listed tabs")).toBeNull();
+
+    fireEvent.click(
+      screen.getByRole("button", {
+        name: `Remove filter ${en.plugins.manager.kinds.layouts}`,
+      }),
+    );
+    expect(screen.getByText("Listed tabs")).toBeTruthy();
+  });
+
+  it("hides plugins this build can't run until shown", async () => {
+    extra = [
+      listed("later", {
+        unsupported: true,
+        needsTermix: ">=26.11.0",
+        latestVersion: null as never,
+      }),
+    ];
+    await renderTab();
+    fireEvent.click(screen.getByText(en.plugins.manager.tabs.browse));
+    expect(screen.queryByText("Listed later")).toBeNull();
+
+    fireEvent.click(
+      screen.getByRole("switch", { name: /Show unsupported \(1\)/ }),
+    );
+
+    expect(screen.getByText("Listed later")).toBeTruthy();
+    expect(screen.getByText("Needs Termix >=26.11.0")).toBeTruthy();
+    expect(
+      screen.queryByRole("button", { name: en.plugins.manager.install }),
+    ).toBeNull();
+  });
+
+  it("pages a long Browse list", async () => {
+    extra = Array.from({ length: 30 }, (_, i) =>
+      listed(`p${String(i).padStart(2, "0")}`),
+    );
+    localStorage.setItem("pluginsTab.view", "list");
+    await renderTab();
+    fireEvent.click(screen.getByText(en.plugins.manager.tabs.browse));
+
+    expect(screen.getAllByText(/^Listed p/)).toHaveLength(24);
+    expect(screen.getByText("1-24 of 30")).toBeTruthy();
+
+    fireEvent.click(
+      screen.getByRole("button", { name: en.plugins.manager.pager.next }),
+    );
+    expect(screen.getAllByText(/^Listed p/)).toHaveLength(6);
+    expect(screen.getByText("Page 2 of 2")).toBeTruthy();
+  });
+
   it("switches to a table and remembers it", async () => {
     await renderTab();
     expect(screen.queryByRole("table")).toBeNull();

src/ui/tests/plugins/plugin-model.test.ts

@@ -9,10 +9,12 @@ import {
   formatBytes,
   formatCount,
   groupChanges,
+  kindsOf,
   matchesQuery,
   mergeReleaseNotes,
   mergePlugins,
   orderByRisk,
+  pageOf,
   pluginSource,
   pluginStatus,
   reportIssueUrl,
@@ -501,3 +503,75 @@ describe("betas", () => {
     ).toBeNull();
   });
 });
+
+describe("plugin kinds", () => {
+  it("joins installed contributions with the registry list", () => {
+    const [row] = mergePlugins(
+      [summary({ contributes: { tabs: [{}] } as never })],
+      [entry({ contributes: ["layouts"] })],
+    );
+    expect(row.kinds.sort()).toEqual(["layouts", "tabs"]);
+  });
+
+  it("counts only the kinds worth filtering by", () => {
+    const rows = mergePlugins(
+      [],
+      [
+        entry({ id: "a", installed: false, contributes: ["layouts", "uses"] }),
+        entry({ id: "b", installed: false, contributes: ["layouts", "tabs"] }),
+      ],
+    );
+    expect(kindsOf(rows)).toEqual([
+      { kind: "layouts", count: 2 },
+      { kind: "tabs", count: 1 },
+    ]);
+  });
+});
+
+describe("unsupported plugins", () => {
+  it("marks a listed plugin with no release this build runs", () => {
+    const [row] = mergePlugins(
+      [],
+      [
+        entry({
+          installed: false,
+          latestVersion: null,
+          versions: [
+            {
+              version: "1.0.0",
+              compatible: false,
+              needsTermix: ">=26.11.0",
+              capabilities: [],
+              size: 1,
+            },
+          ],
+        }),
+      ],
+    );
+    expect(row.unsupported).toBe(true);
+    expect(row.needsTermix).toBe(">=26.11.0");
+  });
+
+  it("leaves a runnable plugin alone", () => {
+    const [row] = mergePlugins([], [entry({ installed: false })]);
+    expect(row.unsupported).toBe(false);
+    expect(row.needsTermix).toBeNull();
+  });
+});
+
+describe("pageOf", () => {
+  const rows = Array.from({ length: 50 }, (_, i) => i);
+
+  it("slices one page", () => {
+    expect(pageOf(rows, 2, 24)).toEqual({
+      items: rows.slice(24, 48),
+      page: 2,
+      pages: 3,
+    });
+  });
+
+  it("clamps a page past the end", () => {
+    expect(pageOf(rows, 9, 24).page).toBe(3);
+    expect(pageOf([], 4, 24)).toEqual({ items: [], page: 1, pages: 1 });
+  });
+});