feat(api): limits read unifiedWindows, unknown seven-day windows labelled by model

src/beaver_gateway/frontends/api/frontend.py

@@ -737,21 +737,32 @@ def build_app(  # noqa: PLR0915
         await require_token(request, runtime, scope=SCOPE)
         rows = await conversations.rate_limits(limit=200)
         latest: dict[str, RateLimit] = {}
+        unified: dict[str, tuple[RateLimit, dict[str, Any]]] = {}
         for row in rows:
             latest.setdefault(row.window, row)
+            for name, info in _unified_windows(row).items():
+                unified.setdefault(name, (row, info))
         now = datetime.now(UTC)
         windows = []
-        for window, row in latest.items():
-            length = WINDOWS.get(window)
-            since = (
-                _aware(row.resets_at) - length
-                if length is not None and row.resets_at is not None
-                else _aware(row.ts)
-            )
+        for window in dict.fromkeys([*latest, *unified]):
+            row = latest.get(window)
+            seen = unified.get(window)
+            public = _limit_public(row) if row else _limit_blank(window, seen)
+            resets = row.resets_at if row else None
+            if seen and _newer_figure(seen, row):
+                carrier, info = seen
+                public["utilization"] = info.get("utilization")
+                public["reported_at"] = _iso(carrier.ts)
+                resets = _unix_dt(info.get("resetsAt")) or resets
+                public["resets_at"] = _iso(resets)
+            length = _window_length(window)
+            anchor = row if row is not None else (seen[0] if seen else None)
+            if length is not None and resets is not None:
+                since = _aware(resets) - length
+            else:
+                since = _aware(anchor.ts) if anchor else now
             gateway = _sum_usage(await _usage_rows(runtime, since, now))
             gateway["since"] = since.isoformat(timespec="seconds")
-            # The API sends a figure only when a window nears its limit;
-            # the last one inside this window is the best lower bound.
             known = next(
                 (
                     r
@@ -764,13 +775,13 @@ def build_app(  # noqa: PLR0915
             )
             windows.append(
                 {
-                    **_limit_public(row),
+                    **public,
                     "gateway": gateway,
                     "last_known": _limit_public(known) if known else None,
                 }
             )
         windows.sort(
-            key=lambda w: (WINDOWS.get(w["window"], timedelta.max), w["window"])
+            key=lambda w: (_window_length(w["window"]) or timedelta.max, w["window"])
         )
         return {"windows": windows, "history": [_limit_public(r) for r in rows[:50]]}
 
@@ -1052,6 +1063,59 @@ def _queue_item(item: InjectQueueItem | None) -> dict[str, Any] | None:
     }
 
 
+def _window_length(name: str) -> timedelta | None:
+    if name.startswith("five_hour"):
+        return timedelta(hours=5)
+    if "seven_day" in name:
+        return timedelta(days=7)
+    return WINDOWS.get(name)
+
+
+def _unix_dt(value: Any) -> datetime | None:
+    if isinstance(value, int | float) and value > 0:
+        return datetime.fromtimestamp(value, tz=UTC)
+    return None
+
+
+def _unified_windows(row: RateLimit) -> dict[str, dict[str, Any]]:
+    """Every window the event carried a figure for, not just the one it was about."""
+    raw = row.raw if isinstance(row.raw, dict) else {}
+    found = raw.get("unifiedWindows")
+    if not isinstance(found, dict):
+        return {}
+    return {
+        str(name): info
+        for name, info in found.items()
+        if isinstance(info, dict) and info.get("utilization") is not None
+    }
+
+
+def _newer_figure(
+    seen: tuple[RateLimit, dict[str, Any]], row: RateLimit | None
+) -> bool:
+    if row is None or row.utilization is None:
+        return True
+    return seen[0].id != row.id and _aware(seen[0].ts) > _aware(row.ts)
+
+
+def _limit_blank(
+    window: str, seen: tuple[RateLimit, dict[str, Any]] | None
+) -> dict[str, Any]:
+    carrier = seen[0] if seen else None
+    return {
+        "id": None,
+        "ts": _iso(carrier.ts) if carrier else None,
+        "window": window,
+        "status": "allowed",
+        "utilization": None,
+        "resets_at": None,
+        "overage_status": None,
+        "overage_resets_at": None,
+        "agent": carrier.agent_name if carrier else None,
+        "session_id": carrier.session_id if carrier else None,
+    }
+
+
 def _limit_public(row: RateLimit) -> dict[str, Any]:
     return {
         "id": row.id,

tests/test_api.py

@@ -247,6 +247,7 @@ async def test_usage_groups_by_agent_day_and_model(world: World) -> None:
 async def test_limits_report_latest_window_with_gateway_spend(world: World) -> None:
     api = Api(world)
     now = datetime.now(UTC)
+    resets = int((now + timedelta(hours=4)).timestamp())
     async with world.db.session() as session:
         session.add(
             RateLimit(
@@ -264,7 +265,20 @@ async def test_limits_report_latest_window_with_gateway_spend(world: World) -> N
                 resets_at=now + timedelta(hours=4),
             )
         )
-        session.add(RateLimit(window="seven_day", status="allowed", utilization=0.3))
+        session.add(
+            RateLimit(
+                window="seven_day",
+                status="allowed",
+                utilization=0.3,
+                raw={
+                    "unifiedWindows": {
+                        "five_hour": {"resetsAt": resets, "utilization": 0.72},
+                        "seven_day": {"resetsAt": resets, "utilization": 0.25},
+                        "seven_day_fable": {"resetsAt": resets, "utilization": 0.1},
+                    }
+                },
+            )
+        )
         await session.commit()
     await seed_usage(
         world,
@@ -280,12 +294,19 @@ async def test_limits_report_latest_window_with_gateway_spend(world: World) -> N
     )
     out = await api.get("/limits")
     windows = {w["window"]: w for w in out["windows"]}
-    assert windows["five_hour"]["utilization"] == 0.9
+    assert windows["five_hour"]["utilization"] == 0.72
+    assert windows["five_hour"]["reported_at"] is not None
     assert windows["five_hour"]["status"] == "allowed_warning"
     assert windows["five_hour"]["gateway"]["output"] == 7
     assert windows["five_hour"]["gateway"]["cost_usd"] == 0.25
     assert windows["seven_day"]["utilization"] == 0.3
-    assert [w["window"] for w in out["windows"]] == ["five_hour", "seven_day"]
+    assert windows["seven_day_fable"]["utilization"] == 0.1
+    assert windows["seven_day_fable"]["status"] == "allowed"
+    assert [w["window"] for w in out["windows"]] == [
+        "five_hour",
+        "seven_day",
+        "seven_day_fable",
+    ]
     assert len(out["history"]) == 3
 
 

ui/src/lib/api/types.ts

@@ -215,6 +215,8 @@ export interface LimitWindow extends LimitRecord {
   gateway: UsageTotals & { since: string };
   // The last figure reported inside this window, if any: a lower bound.
   last_known: LimitRecord | null;
+  // When the figure came from another event's unified report.
+  reported_at?: string | null;
 }
 
 export interface LimitsResponse {

ui/src/lib/limits.ts

@@ -6,8 +6,18 @@ export const LIMIT_LABELS: Record<string, string> = {
   seven_day_sonnet: "7-day · Sonnet",
 };
 
+const SEVEN_DAY = "seven_day_";
+
 export function limitLabel(window: string): string {
-  return LIMIT_LABELS[window] ?? window;
+  const known = LIMIT_LABELS[window];
+  if (known) {
+    return known;
+  }
+  if (window.startsWith(SEVEN_DAY)) {
+    const model = window.slice(SEVEN_DAY.length);
+    return `7-day · ${model.charAt(0).toUpperCase()}${model.slice(1)}`;
+  }
+  return window.replaceAll("_", " ");
 }
 
 // The status as a word, for the windows the API never puts a figure on.