Normalize surrogate characters in ADK invoke_model responses#1427
Open
Normalize surrogate characters in ADK invoke_model responses#1427
Conversation
LLM responses may contain Unicode surrogate characters in Part.text fields, which cause pydantic_core.to_json() to crash with PydanticSerializationError when serializing activity results. Normalize surrogates via UTF-16 encode/decode before returning from invoke_model: surrogate pairs are combined into proper code points (lossless), and lone surrogates are replaced with U+FFFD (per the Unicode spec). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
1 participant
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Summary
Part.textfields (e.g., surrogate pairs representing emoji, or lone surrogates from encoding issues)pydantic_core.to_json()crashes on these withPydanticSerializationError: UnicodeEncodeError: surrogates not allowedwhen serializing theinvoke_modelactivity resultinvoke_model: surrogate pairs are combined into proper code points (lossless), lone surrogates are replaced with U+FFFD (per Unicode spec)