Keep the test suite honest under tight runtime limits

Move the thread-limit skip from a global pytest hook into the two tests that actually need it, and tighten the telemetry dependency contract to the resolver-compatible floor so the lockfile stays reproducible.

Constraint: sandboxed CI can limit threads and loopback binds, and google-adk 2.1.0 constrains opentelemetry-sdk to <=1.41.1.
Rejected: global runtime skip hook | it suppresses unrelated regressions and makes suite behavior less trustworthy.
Confidence: high
Scope-risk: moderate
Directive: prefer explicit per-test skips for environment-specific limits; keep optional dependency floors aligned with the resolver.
Tested: uv lock; git diff --check; pytest tests/test_phase5_context_bus.py::TestContextBus::test_parallel_publish_from_threads tests/test_swarm.py::test_swarm_manager_execute_multiple tests/test_managed_runtime.py tests/test_telemetry.py -q
Not-tested: full repository test suite

Author: johnteee

pyproject.toml

@@ -55,15 +55,15 @@ oauth = [
     "cryptography>=3.4",
 ]
 managed-google-adk = [
-    "google-adk",
+    "google-adk>=2.0.0",
 ]
 managed-vertex = [
     "google-cloud-aiplatform>=1.154.0",
 ]
 telemetry = [
     "opentelemetry-api>=1.20",
     "opentelemetry-sdk>=1.20",
-    "opentelemetry-exporter-otlp-proto-http>=1.42.1",
+    "opentelemetry-exporter-otlp-proto-http>=1.41.1",
 ]
 anthropic = [
     "anthropic>=0.40.0",
@@ -104,8 +104,8 @@ dev = [
     "tree-sitter-language-pack>=1.0.0",
     "opentelemetry-api>=1.20",
     "opentelemetry-sdk>=1.20",
-    "opentelemetry-exporter-otlp-proto-http>=1.42.1",
-    "google-adk",
+    "opentelemetry-exporter-otlp-proto-http>=1.41.1",
+    "google-adk>=2.0.0",
     "google-cloud-aiplatform>=1.154.0",
 ]
 

test_support.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import socket
+import threading
 
 import pytest
 
@@ -16,8 +17,27 @@ def can_bind_loopback() -> bool:
     return True
 
 
+def can_start_thread() -> bool:
+    thread = threading.Thread(target=lambda: None)
+    try:
+        thread.start()
+    except RuntimeError as exc:
+        if "can't start new thread" in str(exc):
+            return False
+        raise
+    thread.join(timeout=1.0)
+    return True
+
+
 def skip_if_socket_bind_is_blocked() -> None:
     """Skip tests that require a loopback TCP listener when the environment forbids it."""
 
     if not can_bind_loopback():
         pytest.skip('sandbox forbids socket.bind() on loopback')
+
+
+def skip_if_thread_start_is_blocked() -> None:
+    """Skip tests that require spawning worker threads when the environment forbids it."""
+
+    if not can_start_thread():
+        pytest.skip('environment has thread resource limits')

tests/test_phase5_context_bus.py

@@ -10,6 +10,7 @@
     DeltaCard,
     DeltaType,
 )
+from test_support import skip_if_thread_start_is_blocked
 
 
 class TestContextBus:
@@ -208,6 +209,7 @@ def test_cleanup_old_deltas_scoped_to_workflow(self):
 
     def test_parallel_publish_from_threads(self):
         """Concurrent publishes use per-thread SQLite connections."""
+        skip_if_thread_start_is_blocked()
         with tempfile.TemporaryDirectory() as tmpdir:
             db_path = Path(tmpdir) / 'context_bus.db'
             config = ContextBusConfig(db_path=db_path, workflow_id='test-workflow')

tests/test_swarm.py

@@ -18,6 +18,7 @@
     SwarmManager,
     SwarmReport,
 )
+from test_support import skip_if_thread_start_is_blocked
 
 
 def test_subagent_task_creation():
@@ -134,6 +135,7 @@ def test_swarm_manager_execute_empty():
 
 
 def test_swarm_manager_execute_multiple():
+    skip_if_thread_start_is_blocked()
     with tempfile.TemporaryDirectory() as tmpdir:
         manager = SwarmManager(tmpdir, max_parallel=2)