Fix broken env scanner - #45
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(The context var is bleeding between different scans, meaning the wrong tools are shown to the scanner model)
The broken_env scanner now receives error events from the transcript and includes error information (message and traceback) in the prompt sent to the LLM. This helps the scanner understand when a run failed due to an error, especially for runs that fail early before any model events are generated. Changes: - Add "error" to the events list in the scanner decorator - Add _get_error_info() function to extract error messages and tracebacks - Include error section in the prompt when errors are present - Update tests to verify error info is included in prompts Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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@pipmc am I right to think that the changes in packages/scanners/src/metr_scanners/scanner.py apply to all scanners not just broken_env? In particular, fixing this
(excited to see this!) |
bsnodin
approved these changes
Jan 30, 2026
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This PR addresses the following issues:
Sample scan here: https://inspect-ai.internal.metr.org/scan/broken-env-test-bub5zi5f9p12op66