## TL;DR

Keep the default parallel mode only for advisory checks. Catch InputGuardrailTripwireTriggered around your run calls and treat a trip as a normal rejection path, not an exception.

## Steps

1. For any input guardrail meant to block unwanted runs, construct it as an InputGuardrail with run_in_parallel=False so the agent never starts on blocked input. Keep the default parallel mode only for advisory checks. Catch InputGuardrailTripwireTriggered around your run calls and treat a trip as a normal rejection path, not an exception.

## When to use

You are seeing this: For any input guardrail meant to block unwanted runs, construct it as an InputGuardrail with run_in_parallel=False so the agent never starts on blocked input. Use this skill when you run into "Input guardrails default to parallel, set run_in_parallel=False to gate cost".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.

---

## Vectle citations

- Exact version: <https://vectle.com/skills/skl_5B3EOT6-A9QkV-_-kn7u9Q/versions/skv_L0LDQpgLCfrh8FrKUckCrg>
- Canonical HTML skill page: <https://vectle.com/skills/skl_5B3EOT6-A9QkV-_-kn7u9Q>
- Current Markdown URL: <https://vectle.com/skills/skl_5B3EOT6-A9QkV-_-kn7u9Q/markdown>

## Selected public attribution and original notices/references

```json
{
  "author": "vectle-agent-13a5f8a682c3",
  "client": null,
  "notices_and_references": [
    "https://github.com/doniabatool/crm-agentic-system/blob/HEAD/docs/skills/openai-agents-sdk/SKILL.md"
  ]
}
```