Add osprey-stress CLI (closes #324) (#367)

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Cassidy James Blaede <cassidyjames@roost.tools>

Author: 3 people

CHANGELOG.md

@@ -24,6 +24,7 @@ For more information about each release including git tags and artifacts, see [R
 - Per-action health metrics in the executor ([#191](https://github.com/roostorg/osprey/pull/191) by [@cmttt](https://github.com/cmttt))
 - Option to suppress cached errors to reduce metric bloat ([#180](https://github.com/roostorg/osprey/pull/180) by [@lithium-powered](https://github.com/lithium-powered))
 - Experimental asyncio-native worker with metrics and engine/coordinator improvements ([#341](https://github.com/roostorg/osprey/pull/341) by [@cmttt](https://github.com/cmttt))
+- `osprey-stress` CLI: closed-loop stress harness that produces synthetic events at a configurable rate, observes their `ExecutionResult`s on the output topic, and reports drop rate and p50/p95/p99 latency, exiting non-zero on threshold breach so it can gate CI on pipeline health ([#367](https://github.com/roostorg/osprey/pull/367) by [@julietshen](https://github.com/julietshen), closes [#324](https://github.com/roostorg/osprey/issues/324))
 
 ### Changed
 
@@ -38,6 +39,7 @@ For more information about each release including git tags and artifacts, see [R
 - Tolerate malformed URI escapes in `EntityWithPopover` UI component ([#377](https://github.com/roostorg/osprey/pull/377) by [@julietshen](https://github.com/julietshen))
 - Add retention limits to Kafka topics to prevent unbounded disk growth ([#249](https://github.com/roostorg/osprey/pull/249) by [@VINODvoid](https://github.com/VINODvoid))
 - Fix failed UDF query ([#233](https://github.com/roostorg/osprey/pull/233) by [@chimosky](https://github.com/chimosky))
+- Force a visible scrollbar on the event-stream virtualized list, which was relying on the OS auto-hide default and was easy to miss ([#367](https://github.com/roostorg/osprey/pull/367) by [@julietshen](https://github.com/julietshen))
 
 ## [1.0.1] - 2026-02-27
 

osprey_ui/src/components/event_stream/EventStream.module.css

@@ -18,6 +18,34 @@
   outline: none;
 }
 
+/* react-virtualized renders a scrolling div with class `ReactVirtualized__List`.
+   On macOS the default scrollbar auto-hides until you're actively scrolling,
+   which makes it hard to skim long result sets — flagged in PR #367. Force a
+   thin always-visible bar in the theme colors. */
+.virtualizedList :global(.ReactVirtualized__List) {
+  scrollbar-width: thin;
+  scrollbar-color: var(--text-light-secondary) var(--background-secondary);
+}
+
+.virtualizedList :global(.ReactVirtualized__List)::-webkit-scrollbar {
+  width: 10px;
+  height: 10px;
+}
+
+.virtualizedList :global(.ReactVirtualized__List)::-webkit-scrollbar-track {
+  background: var(--background-secondary);
+}
+
+.virtualizedList :global(.ReactVirtualized__List)::-webkit-scrollbar-thumb {
+  background-color: var(--text-light-secondary);
+  border-radius: 5px;
+  border: 2px solid var(--background-secondary);
+}
+
+.virtualizedList :global(.ReactVirtualized__List)::-webkit-scrollbar-thumb:hover {
+  background-color: var(--text-light-primary);
+}
+
 .iconText {
   margin-right: 8px;
 }

osprey_worker/pyproject.toml

@@ -14,6 +14,7 @@ dependencies = [
 ]
 [project.scripts]
 osprey-cli = "osprey.worker.lib.cli:cli"
+osprey-stress = "osprey.worker.stress.cli:main"
 
 [project.entry-points."osprey_plugin"]
 stdlib = "osprey.worker._stdlibplugin"