[devin-ai-integration]

Summary

Adds tests/agents/test_reproducibility_agent.py, the first test coverage for ReproAgent.get_action / ReproChatModel (code scan finding sfind-ed8a0ea, low severity). No production code changes.

Covered branches in reproducibility_agent.py:

• old_chat_messages is None → returns (None, AgentInfo(markdown_page=...)) carrying the recorded err_msg instead of replaying.
• len(old_chat_messages) == 2 with a recorded action → appends a reconstructed <action>{recorded_action}</action> assistant message (the legacy old-bug workaround) before replay; with no recorded action the discussion stays at 2 messages and ReproChatModel falls back to <action>None</action>.
• Happy path: the recorded assistant answer is replayed through ReproChatModel, and the diff stats attached by _make_agent_stats show no drift.
• ReproChatModel directly: returns old_messages[len(messages)], and the <action>None</action> fallback when the new discussion has caught up with the recorded one.

The agent is driven with a stub ExpResult/StepInfo (monkeypatched into the module) and CheatMiniWoBLLMArgs; GenericAgent.get_action is stubbed with a 2-message Discussion that it pushes through self.chat_llm, so no LLM or environment is involved.

Verified the tests fail when either branch is removed (if False: mutation of the None-check and of the len == 2 reconstruction).

Devin-Org: engineering

Link to Devin session: https://app.devin.ai/sessions/93845d3fb5e24f43b4009c7f7e97ec38
Open in Devin Desktop: https://app.devin.ai/desktop/session/93845d3fb5e24f43b4009c7f7e97ec38?variant=devin

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment, CI, and merge conflict monitoring