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fix: preserve Luna context-limit error code #284

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fix: preserve Luna context-limit error code #284

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8 changes: 8 additions & 0 deletions evaluators/contrib/galileo/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,14 @@

Integration package for Galileo Luna evaluator.

## Context-limit errors

If the model server rejects an input for exceeding its maximum context length,
the evaluator returns `metadata.error_code: context_limit`. The server still
redacts the error message. Clients can use this safe code to report an unsupported
input separately from transient evaluator failures without exposing internal error
details or retrying the same oversized input.

## Migrating from Luna2

The `galileo.luna2` evaluator ID has been removed. Existing controls that use
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6 changes: 6 additions & 0 deletions evaluators/contrib/galileo/src/agent_control_evaluator_galileo/luna/evaluator.py
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Expand Up @@ -359,6 +359,12 @@ def _handle_error(
**self._base_metadata(),
"error_type": type(error).__name__,
}
# The server redacts error text, so retain this deterministic failure as
# a safe code that clients can distinguish from an evaluator outage.
if isinstance(error, RuntimeError) and error_detail.startswith(
"Input exceeds maximum length for Galileo model server:"
):
metadata["error_code"] = "context_limit"
if isinstance(error, httpx.HTTPStatusError):
metadata.update(_http_status_error_metadata(error))

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