fix: stop streamed tool execution after known input guardrail tripwire#2688
fix: stop streamed tool execution after known input guardrail tripwire#2688
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This pull request fixes a streaming-only guardrail race where
Runner.run_streamed()could still execute same-turn tool side effects after a parallel input guardrail tripwire had already been observed.The change keeps the released
run_in_parallel=Truecontract intact for still-running guardrails, but adds a narrow hardening checkpoint for the streaming path once a tripwire is already known. The streaming guardrail runner now records the first triggered result immediately, and streamed turn resolution checks for that state before executing tools or other same-turn side effects.This also adds regression coverage for the streaming-specific case while preserving the existing tests that document the broader parallel guardrail semantics.