PR Review: Track last_transcript_id as translation id

Summary

This PR adds tracking of transcript IDs to ensure translation results are properly linked to their corresponding transcript results. This is an important fix for maintaining consistency between ASR results and their translations.

Code Quality ✅

Strengths:

• Clear variable naming (last_transcript_id)
• Appropriate comments explaining the logic (lines 463, 530-532)
• Consistent with existing pattern of tracking last transcript metadata
• Version bump in manifest.json is appropriate (0.3.8 → 0.3.9)

Suggestions:

1. Initialization: The new field last_transcript_id is initialized as an empty string on line 73, but it would be clearer to initialize it as "" with a comment explaining when it gets populated.

Logic & Correctness ✅

The implementation looks correct:

1. ID Tracking: After sending ASR results, the code captures result.id (lines 533-535) with a fallback to self.uuid
2. ID Usage: The saved ID is passed to translation results in two places:
   • Standalone translations (line 469)
   • Paired transcript+translation (line 553)
3. Fallback Logic: The _send_translation_results method has proper fallback logic (line 574)

Observation: The comment on line 531 mentions "self.uuid may have been reset if result.final is True" - this suggests the parent class has state management logic that makes tracking the ID critical. The implementation correctly handles this.

Potential Issues ⚠️

1. Empty String vs None: The code uses an empty string "" as the initial value for last_transcript_id, but the function signature uses str | None = None. This inconsistency could be confusing. Consider:

   • Either initialize as None and update the logic, or
   • Document why empty string is preferred over None

2. Race Conditions: In async contexts with multiple transcripts, there's a theoretical risk that last_transcript_id could be overwritten before a standalone translation uses it. However, given the sequential nature of Soniox's API (translations follow transcripts), this appears safe in practice.

Test Coverage ⚠️

Missing: There are no tests for the translation ID tracking feature. The existing test file (test_soniox_asr.py) only tests ASR results without translations.

Recommendation: Add tests that:

• Verify translation results have the correct ID matching their transcript
• Test standalone translations (when translations arrive separately from transcripts)
• Verify the ID is preserved across finalize operations

Example test scenario:

# Test that translation.id matches transcript.id
transcript_token = SonioxTranscriptToken(...)
translation_token = SonioxTranslationToken(...)
# Verify the IDs match after processing

Security ✅

No security concerns. The ID is internally generated and not user-controlled.

Performance ✅

Minimal performance impact:

• Single string assignment per ASR result
• No additional async calls or I/O
• Negligible memory overhead

Additional Notes

1. Logging Addition: The added log statement on lines 595-598 is helpful for debugging but consider:

   • Is LOG_CATEGORY_KEY_POINT the right log level for every translation?
   • In high-volume scenarios, this could generate significant logs

2. Manifest.json: Minor whitespace change (removed trailing newline) - this is fine but unrelated to the feature.

Verdict

APPROVE with recommendations:

This is a solid bug fix that properly tracks translation IDs. The implementation is clean and follows existing patterns. However, I strongly recommend:

1. Add tests for translation ID tracking
2. Consider the empty string vs None consistency issue
3. Review if the new log statement should be at a lower log level

The PR can be merged as-is if tests aren't blocking, but adding test coverage would significantly improve confidence in this critical pairing logic.

Risk Level: Low
Complexity: Low
Recommendation: Approve with follow-up for tests