All agents now track which variables were explicitly present in their prompt
versus fetched from environment variables or git remote. When constructing
subagent prompts, only explicitly-present variables are included. Fetched
variables are omitted, allowing each subagent to fetch them independently.

This prevents credentials and other fetched values from being garbled as they
propagate through multiple LLM prompt layers.

Affected agents:
- auto-agents (primary orchestrator)
- implementation-supervisor, pr-merge-supervisor, pr-review-supervisor
- supervisor (generic)
- implementation-worker, pr-merge-worker, pr-review-worker
- task-implementor, tier-dispatcher
- work-group-util, git-clone-util, git-push-util, git-checkout-util

@@ -0,0 +9,4 @@
+        And no environment variable ``CLEVERAGENTS_LSP_COMMAND`` set
+
+    @tdd_issue @tdd_issue_10597
+    Scenario: Popen raises FileNotFoundError — no process to clean up

@@ -0,0 +8,4 @@
+import tempfile
+from unittest import mock
+
+from behave import given, then, when  # type: ignore[import-untyped]

@@ -0,0 +59,4 @@
+
+
+@given("no subprocess was leaked (no orphan processes exist)")
+def step_no_leak_scenario1(context):  # noqa: ANN201

@@ -0,0 +9,4 @@
+        And no environment variable ``CLEVERAGENTS_LSP_COMMAND`` set
+
+    @tdd_issue @tdd_issue_10597
+    Scenario: Popen raises FileNotFoundError — no process to clean up

@@ -0,0 +8,4 @@
+import tempfile
+from unittest import mock
+
+from behave import given, then, when  # type: ignore[import-untyped]

@@ -0,0 +59,4 @@
+
+
+@given("no subprocess was leaked (no orphan processes exist)")
+def step_no_leak_scenario1(context):  # noqa: ANN201

@@ -0,0 +9,4 @@
+        And no environment variable ``CLEVERAGENTS_LSP_COMMAND`` set
+
+    @tdd_issue @tdd_issue_10597
+    Scenario: Popen raises FileNotFoundError — no process to clean up

@@ -0,0 +8,4 @@
+import tempfile
+from unittest import mock
+
+from behave import given, then, when  # type: ignore[import-untyped]

@@ -0,0 +61,4 @@
+@given("no subprocess was leaked (no orphan processes exist)")
+def step_no_leak_scenario1(context):
+    """Verify that no StdioTransport process is lingering."""
+    assert context._transport._process is None  # type: ignore[attr-defined]