feat(openai-agents): Set system instruction attribute on gen_ai.chat spans

[alexander-alderman-webb]

Description

Revert 54034dc and set system instruction attributes on gen_ai.chat spans instead of gen_ai.invoke_agent spans.

Re-uses functions from setting system instructions in OpenAIIntegration, since openai-agents uses a Responses API compatible input schema.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

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New Features ✨

Openai

• feat(openai): Set system instruction attribute for Responses API by alexander-alderman-webb in #5376
• feat(openai): Set system instruction attribute for Completions API by alexander-alderman-webb in #5359

Openai Agents

• feat(openai-agents): Set system instruction attribute on gen_ai.chat spans by alexander-alderman-webb in #5370

• feat(openai-agents): Set system instruction attribute by alexander-alderman-webb in #5355

Other

• feat(anthropic): Set system instruction attribute by alexander-alderman-webb in #5353
• feat(google-genai): Set system instruction attribute by alexander-alderman-webb in #5354
• feat(langchain): Set system instruction attribute by alexander-alderman-webb in #5357
• feat(pydantic-ai): Set system instruction attribute by alexander-alderman-webb in #5356

Bug Fixes 🐛

• fix(ai): Keep single content input message by alexander-alderman-webb in #5345

Internal Changes 🔧

• ci(release): Fix changelog-preview permissions by BYK in #5368
• ci: Fix path in AI integration tests by alexander-alderman-webb in #5347

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Missing string input handling causes AttributeError crash

Medium Severity

The _set_input_data function declares messages can be str | list[TResponseInputItem] but doesn't handle strings. When messages is a string, the list comprehension iterates over individual characters, and line 168 then calls message.get("type") on each character, raising AttributeError: 'str' object has no attribute 'get'. The OpenAI integration's _set_responses_api_input_data handles this correctly with an if isinstance(messages, str): check that wraps the string and returns early.

Additional Locations (1)

• sentry_sdk/integrations/openai_agents/utils.py#L167-L168

 

[alexander-alderman-webb]

The code throws an exception when passed a string before, so I consider this out of scope.
The type is correct and we should fix this later on, but in practice the patched function is called with a list in code paths from Agent.run().