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chore(ai_guard): add event tag to root spans #17566

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chore(ai_guard): add event tag to root spans #17566

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chore(ai_guard): add event tag to root spans
manuel-alvarez-alvarez Apr 16, 2026
e16637e
Merge branch 'main' into malvarez/ai-guard-event-tag
manuel-alvarez-alvarez Apr 16, 2026
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1 change: 1 addition & 0 deletions ddtrace/appsec/_constants.py
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Original file line number Diff line number Diff line change
Expand Up @@ -456,6 +456,7 @@ class AI_GUARD(metaclass=Constant_Class):
TARGET_TAG: str = TAG + ".target"
BLOCKED_TAG: str = TAG + ".blocked"
TOOL_NAME_TAG: str = TAG + ".tool_name"
EVENT_TAG: str = TAG + ".event"

# meta struct
STRUCT: Literal["ai_guard"] = "ai_guard"
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1 change: 1 addition & 0 deletions ddtrace/appsec/ai_guard/_api_client.py
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Expand Up @@ -313,6 +313,7 @@ def evaluate(self, messages: list[Message], options: Optional[Options] = None) -
root_span = core.get_root_span()
if root_span:
_aiguard_manual_keep(root_span)
root_span.set_tag(AI_GUARD.EVENT_TAG, "true")
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if should_block:
span.set_tag(AI_GUARD.BLOCKED_TAG, "true")
raise AIGuardAbortError(
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11 changes: 11 additions & 0 deletions tests/appsec/ai_guard/api/test_api_client.py
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Expand Up @@ -545,3 +545,14 @@ def test_endpoint_discovery(site, config, param, expected):
with override_ai_guard_config(dict(_ai_guard_endpoint=config)):
client = new_ai_guard_client(endpoint=param)
assert client._endpoint == expected


@patch("ddtrace.appsec.ai_guard._api_client.AIGuardClient._execute_request")
def test_event_tag_in_root_span(mock_execute_request, ai_guard_client, tracer):
"""Test that AI Guard event tag is set on the root span of the trace."""
mock_execute_request.return_value = mock_evaluate_response("ALLOW", reason="It's fine")

with tracer.trace("root_span") as root_span:
ai_guard_client.evaluate(PROMPT, Options(block=False))

assert root_span.get_tag(AI_GUARD.EVENT_TAG) == "true"
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