diff --git a/src/web/Search.tsx b/src/web/Search.tsx
index 2b9d8a5..699fbfd 100644
--- a/src/web/Search.tsx
+++ b/src/web/Search.tsx
@@ -1,19 +1,52 @@
-import { useEffect, useMemo, useState } from "react";
+import { useEffect, useMemo, useState, type ReactNode } from "react";
 import { searchRuns, type ApiSearchMatch } from "./api.js";
-import { StatusBadge } from "./Dashboard.js";
+import { StatusBadge } from "./shared.js";
+import {
+  EMPTY_FILTERS,
+  type MatchKind,
+  type SearchFilters,
+  availableStatuses,
+  filterMatches,
+  summarizeMatches,
+  toggleSetMember,
+} from "./searchUtils.js";
 
-export function Search({ query }: { query: string }) {
-  const [input, setInput] = useState(query);
-  const [state, setState] = useState<
-    | { tag: "idle" }
-    | { tag: "loading" }
-    | { tag: "ready"; matches: ApiSearchMatch[] }
-    | { tag: "error"; message: string }
-  >(query ? { tag: "loading" } : { tag: "idle" });
+const DEBOUNCE_MS = 250;
+
+type SearchState =
+  | { tag: "idle" }
+  | { tag: "loading" }
+  | { tag: "ready"; matches: ApiSearchMatch[] }
+  | { tag: "error"; message: string };
+
+export function Search({ query: initialQuery }: { query: string }) {
+  const [input, setInput] = useState(initialQuery);
+  const [activeQuery, setActiveQuery] = useState(initialQuery);
+  const [filters, setFilters] = useState<SearchFilters>(EMPTY_FILTERS);
+  const [state, setState] = useState<SearchState>(
+    initialQuery ? { tag: "loading" } : { tag: "idle" },
+  );
 
   useEffect(() => {
-    setInput(query);
-    if (!query) {
+    setInput(initialQuery);
+    setActiveQuery(initialQuery);
+  }, [initialQuery]);
+
+  useEffect(() => {
+    const trimmed = input.trim();
+    if (trimmed === activeQuery) return;
+    const t = setTimeout(() => {
+      setActiveQuery(trimmed);
+      const newHash = trimmed ? `#/search?q=${encodeURIComponent(trimmed)}` : "#/search";
+      if (window.location.hash !== newHash) {
+        window.history.replaceState(null, "", newHash);
+      }
+    }, DEBOUNCE_MS);
+    return () => clearTimeout(t);
+  }, [input, activeQuery]);
+
+  useEffect(() => {
+    if (!activeQuery) {
       setState({ tag: "idle" });
       return;
     }
@@ -21,7 +54,7 @@ export function Search({ query }: { query: string }) {
     setState({ tag: "loading" });
     (async () => {
       try {
-        const res = await searchRuns(query);
+        const res = await searchRuns(activeQuery);
         if (!cancelled) setState({ tag: "ready", matches: res.matches });
       } catch (err) {
         if (!cancelled) setState({ tag: "error", message: (err as Error).message });
@@ -30,10 +63,11 @@ export function Search({ query }: { query: string }) {
     return () => {
       cancelled = true;
     };
-  }, [query]);
+  }, [activeQuery]);
 
-  const submit = (q: string) => {
-    const trimmed = q.trim();
+  const submit = () => {
+    const trimmed = input.trim();
+    setActiveQuery(trimmed);
     window.location.hash = trimmed ? `#/search?q=${encodeURIComponent(trimmed)}` : "#/search";
   };
 
@@ -42,7 +76,7 @@ export function Search({ query }: { query: string }) {
       <form
         onSubmit={(e) => {
           e.preventDefault();
-          submit(input);
+          submit();
         }}
         className="flex gap-2"
       >
@@ -63,46 +97,145 @@ export function Search({ query }: { query: string }) {
 
       {state.tag === "idle" && (
         <p className="text-sm text-slate-400">
-          Type a phrase that might appear in a turn's content or an event payload.
+          Type a phrase that might appear in a turn's content or an event payload. Results update as
+          you type — searches are case-insensitive substring matches.
         </p>
       )}
       {state.tag === "loading" && <p className="text-slate-400 text-sm">searching…</p>}
       {state.tag === "error" && <p className="text-rose-400 text-sm">{state.message}</p>}
-      {state.tag === "ready" && <SearchResults query={query} matches={state.matches} />}
+      {state.tag === "ready" && (
+        <SearchResults
+          query={activeQuery}
+          matches={state.matches}
+          filters={filters}
+          setFilters={setFilters}
+        />
+      )}
     </div>
   );
 }
 
-function SearchResults({ query, matches }: { query: string; matches: ApiSearchMatch[] }) {
+function SearchResults({
+  query,
+  matches,
+  filters,
+  setFilters,
+}: {
+  query: string;
+  matches: ApiSearchMatch[];
+  filters: SearchFilters;
+  setFilters: (f: SearchFilters) => void;
+}) {
+  const summary = useMemo(() => summarizeMatches(matches), [matches]);
+  const statuses = useMemo(() => availableStatuses(matches), [matches]);
+  const filtered = useMemo(() => filterMatches(matches, filters), [matches, filters]);
+
   if (matches.length === 0) {
-    return <p className="text-sm text-slate-400">No matches for "{query}".</p>;
+    return (
+      <div className="space-y-1">
+        <p className="text-sm text-slate-300">No matches for "{query}".</p>
+        <p className="text-xs text-slate-500">
+          Tip: searches are case-insensitive substring matches over turn content and event payloads.
+          Try broader terms or check that the phrase appears verbatim.
+        </p>
+      </div>
+    );
   }
+
+  const toggleKind = (kind: MatchKind) =>
+    setFilters({ ...filters, kinds: toggleSetMember(filters.kinds, kind) });
+
+  const toggleStatus = (status: string) =>
+    setFilters({ ...filters, statuses: toggleSetMember(filters.statuses, status) });
+
+  const filteredOut = matches.length - filtered.length;
+
   return (
-    <ul className="space-y-2">
-      {matches.map((m, i) => (
-        <li
-          key={`${m.runId}:${m.matchKind}:${m.turnNumber ?? m.eventType ?? i}`}
-          className="rounded border border-slate-800 bg-slate-900/60 p-3"
-        >
-          <a
-            href={`#/runs/${m.runId}`}
-            className="flex flex-wrap items-baseline gap-2 text-sm rounded focus:outline-none focus-visible:ring-2 focus-visible:ring-cyan-500"
-          >
-            <span className="font-mono text-cyan-400">{m.issueIdentifier}</span>
-            {m.issueTitle && (
-              <span className="text-slate-300 truncate" title={m.issueTitle}>
-                {m.issueTitle}
-              </span>
-            )}
-            <StatusBadge status={m.status} />
-            <span className="text-xs text-slate-500">
-              {m.matchKind === "turn" ? `turn #${m.turnNumber}` : `event ${m.eventType}`}
-            </span>
-          </a>
-          <Highlighted text={m.snippet} query={query} />
-        </li>
-      ))}
-    </ul>
+    <div className="space-y-3">
+      <div className="text-sm text-slate-300">
+        <span className="font-medium">{summary.total}</span>{" "}
+        {summary.total === 1 ? "match" : "matches"} across{" "}
+        <span className="font-medium">{summary.runs}</span> {summary.runs === 1 ? "run" : "runs"} ·{" "}
+        {summary.turns} {summary.turns === 1 ? "turn" : "turns"} · {summary.events}{" "}
+        {summary.events === 1 ? "event" : "events"}
+        {filteredOut > 0 && <span className="text-slate-500"> · showing {filtered.length}</span>}
+      </div>
+      <div className="flex flex-wrap items-center gap-2 text-xs">
+        <span className="text-slate-500">kind:</span>
+        <Chip active={filters.kinds.has("turn")} onClick={() => toggleKind("turn")}>
+          turns ({summary.turns})
+        </Chip>
+        <Chip active={filters.kinds.has("event")} onClick={() => toggleKind("event")}>
+          events ({summary.events})
+        </Chip>
+        {statuses.length > 1 && (
+          <>
+            <span className="text-slate-500 ml-2">status:</span>
+            {statuses.map((s) => (
+              <Chip key={s} active={filters.statuses.has(s)} onClick={() => toggleStatus(s)}>
+                {s}
+              </Chip>
+            ))}
+          </>
+        )}
+      </div>
+      {filtered.length === 0 ? (
+        <p className="text-sm text-slate-400">
+          No matches under the current filters. Toggle a chip to widen.
+        </p>
+      ) : (
+        <ul className="space-y-2">
+          {filtered.map((m, i) => (
+            <li
+              key={`${m.runId}:${m.matchKind}:${m.turnNumber ?? m.eventType ?? i}`}
+              className="rounded border border-slate-800 bg-slate-900/60 p-3"
+            >
+              <a
+                href={`#/runs/${m.runId}`}
+                className="flex flex-wrap items-baseline gap-2 text-sm rounded focus:outline-none focus-visible:ring-2 focus-visible:ring-cyan-500"
+              >
+                <span className="font-mono text-cyan-400">{m.issueIdentifier}</span>
+                {m.issueTitle && (
+                  <span className="text-slate-300 truncate" title={m.issueTitle}>
+                    {m.issueTitle}
+                  </span>
+                )}
+                <StatusBadge status={m.status} />
+                <span className="text-xs text-slate-500">
+                  {m.matchKind === "turn" ? `turn #${m.turnNumber}` : `event ${m.eventType}`}
+                </span>
+              </a>
+              <Highlighted text={m.snippet} query={query} />
+            </li>
+          ))}
+        </ul>
+      )}
+    </div>
+  );
+}
+
+function Chip({
+  active,
+  onClick,
+  children,
+}: {
+  active: boolean;
+  onClick: () => void;
+  children: ReactNode;
+}) {
+  return (
+    <button
+      type="button"
+      onClick={onClick}
+      aria-pressed={active}
+      className={`rounded-full border px-2 py-0.5 transition focus:outline-none focus-visible:ring-2 focus-visible:ring-cyan-500 ${
+        active
+          ? "border-cyan-500 bg-cyan-500/10 text-cyan-200"
+          : "border-slate-700 bg-slate-900 text-slate-400 hover:text-slate-200"
+      }`}
+    >
+      {children}
+    </button>
   );
 }
 
diff --git a/src/web/searchUtils.test.ts b/src/web/searchUtils.test.ts
new file mode 100644
index 0000000..65df41f
--- /dev/null
+++ b/src/web/searchUtils.test.ts
@@ -0,0 +1,119 @@
+import { describe, expect, it } from "vitest";
+import type { ApiSearchMatch } from "./api.js";
+import {
+  EMPTY_FILTERS,
+  availableStatuses,
+  filterMatches,
+  summarizeMatches,
+  toggleSetMember,
+} from "./searchUtils.js";
+
+function match(overrides: Partial<ApiSearchMatch> = {}): ApiSearchMatch {
+  return {
+    runId: "run-1",
+    issueIdentifier: "BEN-1",
+    issueTitle: "demo",
+    status: "completed",
+    matchKind: "turn",
+    turnNumber: 1,
+    eventType: null,
+    snippet: "hello",
+    ...overrides,
+  };
+}
+
+describe("summarizeMatches", () => {
+  it("returns zeroes for an empty list", () => {
+    expect(summarizeMatches([])).toEqual({ total: 0, runs: 0, turns: 0, events: 0 });
+  });
+
+  it("counts unique runs and per-kind matches", () => {
+    const matches = [
+      match({ runId: "a", matchKind: "turn", turnNumber: 1 }),
+      match({ runId: "a", matchKind: "turn", turnNumber: 2 }),
+      match({ runId: "a", matchKind: "event", turnNumber: null, eventType: "error" }),
+      match({ runId: "b", matchKind: "event", turnNumber: null, eventType: "error" }),
+    ];
+    expect(summarizeMatches(matches)).toEqual({ total: 4, runs: 2, turns: 2, events: 2 });
+  });
+});
+
+describe("availableStatuses", () => {
+  it("dedupes and sorts statuses", () => {
+    const matches = [
+      match({ status: "running" }),
+      match({ status: "completed" }),
+      match({ status: "running" }),
+      match({ status: "failed" }),
+    ];
+    expect(availableStatuses(matches)).toEqual(["completed", "failed", "running"]);
+  });
+
+  it("returns [] when there are no matches", () => {
+    expect(availableStatuses([])).toEqual([]);
+  });
+});
+
+describe("filterMatches", () => {
+  const matches = [
+    match({ runId: "a", matchKind: "turn", status: "completed" }),
+    match({ runId: "b", matchKind: "event", status: "running", eventType: "tool" }),
+    match({ runId: "c", matchKind: "turn", status: "failed" }),
+  ];
+
+  it("returns a copy when no filters are active", () => {
+    const out = filterMatches(matches, EMPTY_FILTERS);
+    expect(out).toEqual(matches);
+    expect(out).not.toBe(matches);
+  });
+
+  it("narrows by match kind", () => {
+    const out = filterMatches(matches, {
+      kinds: new Set(["turn"]),
+      statuses: new Set(),
+    });
+    expect(out.map((m) => m.runId)).toEqual(["a", "c"]);
+  });
+
+  it("narrows by status", () => {
+    const out = filterMatches(matches, {
+      kinds: new Set(),
+      statuses: new Set(["running", "failed"]),
+    });
+    expect(out.map((m) => m.runId)).toEqual(["b", "c"]);
+  });
+
+  it("combines kind and status filters with AND semantics", () => {
+    const out = filterMatches(matches, {
+      kinds: new Set(["turn"]),
+      statuses: new Set(["failed"]),
+    });
+    expect(out.map((m) => m.runId)).toEqual(["c"]);
+  });
+
+  it("returns an empty list when filters exclude everything", () => {
+    const out = filterMatches(matches, {
+      kinds: new Set(["event"]),
+      statuses: new Set(["failed"]),
+    });
+    expect(out).toEqual([]);
+  });
+});
+
+describe("toggleSetMember", () => {
+  it("adds a missing value", () => {
+    const next = toggleSetMember(new Set(["a"]), "b");
+    expect([...next].sort()).toEqual(["a", "b"]);
+  });
+
+  it("removes an existing value", () => {
+    const next = toggleSetMember(new Set(["a", "b"]), "a");
+    expect([...next]).toEqual(["b"]);
+  });
+
+  it("does not mutate the input", () => {
+    const input = new Set(["a"]);
+    toggleSetMember(input, "b");
+    expect([...input]).toEqual(["a"]);
+  });
+});
diff --git a/src/web/searchUtils.ts b/src/web/searchUtils.ts
new file mode 100644
index 0000000..8573857
--- /dev/null
+++ b/src/web/searchUtils.ts
@@ -0,0 +1,59 @@
+import type { ApiSearchMatch } from "./api.js";
+
+export type MatchKind = "turn" | "event";
+
+export interface SearchFilters {
+  kinds: ReadonlySet<MatchKind>;
+  statuses: ReadonlySet<string>;
+}
+
+export interface SearchSummary {
+  total: number;
+  runs: number;
+  turns: number;
+  events: number;
+}
+
+export const EMPTY_FILTERS: SearchFilters = {
+  kinds: new Set<MatchKind>(),
+  statuses: new Set<string>(),
+};
+
+export function summarizeMatches(matches: ReadonlyArray<ApiSearchMatch>): SearchSummary {
+  const runs = new Set<string>();
+  let turns = 0;
+  let events = 0;
+  for (const m of matches) {
+    runs.add(m.runId);
+    if (m.matchKind === "turn") turns++;
+    else if (m.matchKind === "event") events++;
+  }
+  return { total: matches.length, runs: runs.size, turns, events };
+}
+
+export function availableStatuses(matches: ReadonlyArray<ApiSearchMatch>): string[] {
+  const set = new Set<string>();
+  for (const m of matches) set.add(m.status);
+  return [...set].sort();
+}
+
+export function filterMatches(
+  matches: ReadonlyArray<ApiSearchMatch>,
+  filters: SearchFilters,
+): ApiSearchMatch[] {
+  const allKinds = filters.kinds.size === 0;
+  const allStatuses = filters.statuses.size === 0;
+  if (allKinds && allStatuses) return [...matches];
+  return matches.filter((m) => {
+    if (!allKinds && !filters.kinds.has(m.matchKind)) return false;
+    if (!allStatuses && !filters.statuses.has(m.status)) return false;
+    return true;
+  });
+}
+
+export function toggleSetMember<T>(set: ReadonlySet<T>, value: T): Set<T> {
+  const next = new Set(set);
+  if (next.has(value)) next.delete(value);
+  else next.add(value);
+  return next;
+}