Replaced 30s setInterval with a persistent fetch + ReadableStream SSE consumer

backend/app/api/activity.py

@@ -323,6 +323,10 @@ def _parse_ts(ts: str | None) -> datetime | None:
         return None
 
 
+_TICKER_STREAM_POLL = 2        # seconds between stream poll cycles
+_TICKER_GATEWAY_INTERVAL = 30  # seconds between gateway polls in stream
+_TICKER_SEEN_MAX = 2000
+
 _BASH_CMD_MAX = 80
 _TASK_DESC_MAX = 60
 
@@ -480,6 +484,115 @@ def _extract_codex_ticker_items(path: Path, cutoff: datetime) -> list[ActivityTi
     return items
 
 
+def _read_new_lines(path: Path, offsets: dict[str, int]) -> list[str]:
+    """Read only new bytes since the last recorded offset. Updates offsets in-place."""
+    key = str(path)
+    offset = offsets.get(key, 0)
+    try:
+        with open(path, "rb") as fh:
+            fh.seek(0, 2)
+            size = fh.tell()
+            if size <= offset:
+                return []
+            fh.seek(offset)
+            data = fh.read()
+        last_nl = data.rfind(b"\n")
+        if last_nl < 0:
+            return []
+        offsets[key] = offset + last_nl + 1
+        return data[: last_nl + 1].decode("utf-8", errors="replace").splitlines()
+    except (OSError, PermissionError):
+        return []
+
+
+def _init_offsets_to_eof(roots: list[Path], offsets: dict[str, int]) -> None:
+    """Seed offsets to current EOF so the stream only emits future writes."""
+    for root in roots:
+        if not root.exists():
+            continue
+        for path in root.rglob("*.jsonl"):
+            try:
+                offsets[str(path)] = path.stat().st_size
+            except (OSError, PermissionError):
+                pass
+
+
+def _claude_items_from_lines(
+    lines: list[str],
+    seen_msg_ids: set[str],
+    cutoff: datetime | None = None,
+) -> list[tuple[str, ActivityTickerItem]]:
+    """Return (stable_key, item) pairs for tool-use blocks in Claude JSONL lines."""
+    result: list[tuple[str, ActivityTickerItem]] = []
+    for line in lines:
+        if not line.strip():
+            continue
+        try:
+            rec = json.loads(line)
+        except json.JSONDecodeError:
+            continue
+        if rec.get("type") != "assistant" or rec.get("isSidechain"):
+            continue
+        ts = _parse_ts(rec.get("timestamp"))
+        if ts is None or (cutoff and ts < cutoff):
+            continue
+        msg = rec.get("message") or {}
+        msg_id = msg.get("id") or ""
+        if msg_id and msg_id in seen_msg_ids:
+            continue
+        if msg_id:
+            seen_msg_ids.add(msg_id)
+        content = msg.get("content") if isinstance(msg.get("content"), list) else []
+        tool_blocks = [b for b in content if isinstance(b, dict) and b.get("type") == "tool_use"]
+        for i, block in enumerate(tool_blocks):
+            tool_name = str(block.get("name") or "")
+            inp = block.get("input") or {}
+            if not isinstance(inp, dict):
+                inp = {}
+            label = _format_tool_status(tool_name, inp)
+            block_id = str(block.get("id") or f"{msg_id}:{i}")
+            key = f"cc:{block_id}"
+            result.append((key, ActivityTickerItem(
+                id=uuid4(), source="Claude Code", message=label, created_at=ts,
+            )))
+    return result
+
+
+def _codex_items_from_lines(
+    lines: list[str],
+    seen_call_ids: set[str],
+    cutoff: datetime | None = None,
+) -> list[tuple[str, ActivityTickerItem]]:
+    """Return (stable_key, item) pairs for tool-call records in Codex JSONL lines."""
+    result: list[tuple[str, ActivityTickerItem]] = []
+    for line in lines:
+        if not line.strip():
+            continue
+        try:
+            rec = json.loads(line)
+        except json.JSONDecodeError:
+            continue
+        if rec.get("type") != "response_item":
+            continue
+        ts = _parse_ts(rec.get("timestamp"))
+        if ts is None or (cutoff and ts < cutoff):
+            continue
+        payload = rec.get("payload") or {}
+        call_id = str(payload.get("call_id") or "")
+        if call_id and call_id in seen_call_ids:
+            continue
+        if call_id:
+            seen_call_ids.add(call_id)
+        label = _format_codex_tool(payload)
+        if not label:
+            continue
+        key = f"cx:{call_id or uuid4()}"
+        result.append((key, ActivityTickerItem(
+            id=uuid4(), source="Codex", message=label, created_at=ts,
+        )))
+    return result
+
+
 def _fetch_local_session_items_sync(cutoff: datetime) -> list[ActivityTickerItem]:
     items: list[ActivityTickerItem] = []
 
@@ -583,6 +696,167 @@ async def get_activity_ticker(
     return all_items[:limit]
 
 
+@router.get("/ticker/stream", summary="Live activity ticker (SSE)")
+async def stream_activity_ticker(
+    request: Request,
+    session: AsyncSession = SESSION_DEP,
+    ctx: OrganizationContext = ORG_MEMBER_DEP,
+) -> EventSourceResponse:
+    """Push ticker items as SSE events. Event type: ``ticker_item``."""
+    board_ids = await list_accessible_board_ids(session, member=ctx.member, write=False)
+    gw_rows = list((await session.exec(
+        select(Gateway).where(col(Gateway.organization_id) == ctx.organization.id)
+    )).all())
+
+    claude_root_env = os.environ.get("CLAUDE_PROJECTS_PATH", "").strip()
+    claude_root = Path(claude_root_env) if claude_root_env else Path.home() / ".claude" / "projects"
+    codex_root_env = os.environ.get("CODEX_SESSIONS_PATH", "").strip()
+    codex_root = Path(codex_root_env) if codex_root_env else Path.home() / ".codex" / "sessions"
+
+    async def event_generator() -> Any:
+        seen_keys: set[str] = set()
+        seen_queue: deque[str] = deque()
+        file_offsets: dict[str, int] = {}
+        seen_cc_msg_ids: set[str] = set()
+        seen_cx_call_ids: set[str] = set()
+
+        def _track(key: str) -> bool:
+            if key in seen_keys:
+                return False
+            seen_keys.add(key)
+            seen_queue.append(key)
+            if len(seen_queue) > _TICKER_SEEN_MAX:
+                seen_keys.discard(seen_queue.popleft())
+            return True
+
+        def _emit(key: str, item: ActivityTickerItem) -> dict[str, str] | None:
+            if not _track(key):
+                return None
+            return {"event": "ticker_item", "data": item.model_dump_json()}
+
+        # ── Initial snapshot ──────────────────────────────────────────────
+        cutoff_2h = utcnow() - timedelta(hours=2)
+
+        def _build_db_stmt(since: datetime) -> Any:
+            stmt = (
+                select(ActivityEvent, Agent)
+                .outerjoin(Agent, col(ActivityEvent.agent_id) == col(Agent.id))
+                .outerjoin(Task, col(ActivityEvent.task_id) == col(Task.id))
+                .where(func.length(func.trim(col(ActivityEvent.message))) > 0)
+                .where(col(ActivityEvent.created_at) >= since)
+                .order_by(asc(col(ActivityEvent.created_at)))
+                .limit(50)
+            )
+            if board_ids:
+                return stmt.where(or_(
+                    col(ActivityEvent.board_id).in_(board_ids),
+                    and_(
+                        col(ActivityEvent.board_id).is_(None),
+                        col(Task.board_id).in_(board_ids),
+                    ),
+                ))
+            return stmt.where(col(ActivityEvent.id).is_(None))
+
+        async with async_session_maker() as init_db:
+            init_rows = (await init_db.exec(_build_db_stmt(cutoff_2h))).all()
+
+        batch: list[tuple[str, ActivityTickerItem]] = []
+        for row in init_rows:
+            ev: ActivityEvent = row[0]
+            ag: Agent | None = row[1]
+            msg = (ev.message or "").strip()
+            if msg:
+                batch.append((f"db:{ev.id}", ActivityTickerItem(
+                    id=ev.id, source=_ticker_source(ev, ag),
+                    message=msg[:200], created_at=ev.created_at,
+                )))
+
+        # Initial JSONL snapshot using tail approach
+        def _init_local() -> list[tuple[str, ActivityTickerItem]]:
+            local: list[tuple[str, ActivityTickerItem]] = []
+            for root, extractor in (
+                (claude_root, lambda lines: _claude_items_from_lines(lines, set(), cutoff_2h)),
+                (codex_root,  lambda lines: _codex_items_from_lines(lines, set(), cutoff_2h)),
+            ):
+                if not root.exists():
+                    continue
+                for path in root.rglob("*.jsonl"):
+                    try:
+                        mtime = datetime.utcfromtimestamp(path.stat().st_mtime)
+                        if mtime >= cutoff_2h:
+                            local.extend(extractor(_tail_lines(path)))
+                    except (OSError, PermissionError):
+                        pass
+            return local
+
+        batch.extend(await asyncio.to_thread(_init_local))
+        batch.sort(key=lambda x: x[1].created_at)
+        for key, item in batch:
+            ev_data = _emit(key, item)
+            if ev_data:
+                yield ev_data
+
+        # Seed offsets to EOF so we only stream new writes going forward
+        await asyncio.to_thread(_init_offsets_to_eof, [claude_root, codex_root], file_offsets)
+
+        last_db_ts = utcnow()
+        last_gateway_poll: datetime = datetime.min
+
+        # ── Live loop ─────────────────────────────────────────────────────
+        while True:
+            if await request.is_disconnected():
+                break
+
+            await asyncio.sleep(_TICKER_STREAM_POLL)
+            now = utcnow()
+            live_batch: list[tuple[str, ActivityTickerItem]] = []
+
+            # DB: events since last check
+            async with async_session_maker() as poll_db:
+                poll_rows = (await poll_db.exec(_build_db_stmt(last_db_ts))).all()
+            last_db_ts = now
+            for row in poll_rows:
+                ev, ag = row[0], row[1]
+                msg = (ev.message or "").strip()
+                if msg:
+                    live_batch.append((f"db:{ev.id}", ActivityTickerItem(
+                        id=ev.id, source=_ticker_source(ev, ag),
+                        message=msg[:200], created_at=ev.created_at,
+                    )))
+
+            # Local JSONL: incremental (new bytes only)
+            def _poll_local() -> list[tuple[str, ActivityTickerItem]]:
+                items: list[tuple[str, ActivityTickerItem]] = []
+                for root, extractor in (
+                    (claude_root, lambda lines: _claude_items_from_lines(lines, seen_cc_msg_ids)),
+                    (codex_root,  lambda lines: _codex_items_from_lines(lines, seen_cx_call_ids)),
+                ):
+                    if not root.exists():
+                        continue
+                    for path in root.rglob("*.jsonl"):
+                        new_lines = _read_new_lines(path, file_offsets)
+                        if new_lines:
+                            items.extend(extractor(new_lines))
+                return items
+
+            live_batch.extend(await asyncio.to_thread(_poll_local))
+
+            # Gateway: every 30s
+            if (now - last_gateway_poll).total_seconds() >= _TICKER_GATEWAY_INTERVAL:
+                gw_items = await _fetch_runtime_ticker_items(gw_rows, cutoff_2h)
+                for item in gw_items:
+                    live_batch.append((f"gw:{item.id}", item))
+                last_gateway_poll = now
+
+            live_batch.sort(key=lambda x: x[1].created_at)
+            for key, item in live_batch:
+                ev_data = _emit(key, item)
+                if ev_data:
+                    yield ev_data
+
+    return EventSourceResponse(event_generator(), ping=15)
+
+
 @router.get("", response_model=DefaultLimitOffsetPage[ActivityEventRead])
 async def list_activity(
     session: AsyncSession = SESSION_DEP,

frontend/src/components/organisms/AgentActivityTicker.tsx

@@ -3,7 +3,8 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 
 import { useAuth } from "@/auth/clerk";
-import { customFetch } from "@/api/mutator";
+import { getLocalAuthToken } from "@/auth/localAuth";
+import { getApiBaseUrl } from "@/lib/api-base";
 
 interface TickerItem {
   id: string;
@@ -24,41 +25,103 @@ function fmtRelative(isoString: string): string {
   return `${Math.floor(h / 24)}d ago`;
 }
 
-async function fetchTickerItems(limit = 20): Promise<TickerItem[]> {
+async function getAuthHeaders(): Promise<Record<string, string>> {
-  const res = await customFetch<{ data: TickerItem[]; status: number }>(
+  const headers: Record<string, string> = {};
-    `/api/v1/activity/ticker?limit=${limit}`,
+  const local = getLocalAuthToken();
-    { method: "GET" },
+  if (local) {
-  );
+    headers.Authorization = `Bearer ${local}`;
-  if (res.status === 200) return res.data;
+    return headers;
-  return [];
   }
+  try {
+    const clerk = (window as unknown as { Clerk?: { session?: { getToken: () => Promise<string> } } }).Clerk;
+    if (clerk?.session) {
+      const token = await clerk.session.getToken();
+      if (token) headers.Authorization = `Bearer ${token}`;
+    }
+  } catch {}
+  return headers;
+}
+
+const MAX_ITEMS = 40;
+const RECONNECT_DELAY_MS = 3_000;
 
 export function AgentActivityTicker() {
   const { isSignedIn } = useAuth();
   const [items, setItems] = useState<TickerItem[]>([]);
-  const intervalRef = useRef<ReturnType<typeof setInterval> | null>(null);
+  const cancelledRef = useRef(false);
+  const seenRef = useRef(new Set<string>());
 
-  const load = useCallback(async () => {
+  const connect = useCallback(async () => {
+    if (!isSignedIn) return;
+    cancelledRef.current = false;
+
+    const url = `${getApiBaseUrl()}/api/v1/activity/ticker/stream`;
+    let headers: Record<string, string>;
     try {
-      const data = await fetchTickerItems(20);
+      headers = await getAuthHeaders();
-      if (data.length > 0) setItems(data);
     } catch {
-      // Silent — ticker is non-critical
+      return;
     }
-  }, []);
+
+    try {
+      const res = await fetch(url, { headers });
+      if (!res.ok || !res.body) return;
+
+      const reader = res.body.getReader();
+      const decoder = new TextDecoder();
+      let buf = "";
+
+      while (!cancelledRef.current) {
+        const { value, done } = await reader.read();
+        if (done) break;
+        buf += decoder.decode(value, { stream: true });
+        buf = buf.replace(/\r\n/g, "\n");
+        let boundary = buf.indexOf("\n\n");
+        while (boundary !== -1) {
+          const raw = buf.slice(0, boundary);
+          buf = buf.slice(boundary + 2);
+          let eventType = "";
+          let data = "";
+          for (const line of raw.split("\n")) {
+            if (line.startsWith("event:")) eventType = line.slice(6).trim();
+            else if (line.startsWith("data:")) data += line.slice(5).trim();
+          }
+          if (eventType === "ticker_item" && data) {
+            try {
+              const item = JSON.parse(data) as TickerItem;
+              if (!seenRef.current.has(item.id)) {
+                seenRef.current.add(item.id);
+                setItems((prev) => [item, ...prev].slice(0, MAX_ITEMS));
+              }
+            } catch {}
+          }
+          boundary = buf.indexOf("\n\n");
+        }
+      }
+    } catch {
+      // fall through to reconnect
+    }
+
+    // Reconnect unless the component unmounted
+    if (!cancelledRef.current) {
+      setTimeout(() => {
+        if (!cancelledRef.current) connect();
+      }, RECONNECT_DELAY_MS);
+    }
+  }, [isSignedIn]);
 
   useEffect(() => {
-    if (!isSignedIn) return;
+    cancelledRef.current = false;
-    void load();
+    seenRef.current = new Set();
-    intervalRef.current = setInterval(() => void load(), 30_000);
+    setItems([]);
+    void connect();
     return () => {
-      if (intervalRef.current) clearInterval(intervalRef.current);
+      cancelledRef.current = true;
     };
-  }, [isSignedIn, load]);
+  }, [connect]);
 
   if (items.length === 0) return null;
 
-  // Duplicate items for a seamless loop (animate-ticker moves -50%)
   const display = [...items, ...items];
 
   return (