# Execution Log

**Run**: 01-quality-cleanup
**Date**: 2026-04-13

## Summary

| Metric | Value |
|--------|-------|
| Total tasks | 3 |
| Batches | 2 |
| Total changes | 10 (C01–C10) |
| Files modified | 7 |
| Tests before | 18 passed |
| Tests after | 18 passed |

## Batches

### Batch 4: Crypto + Thread Safety (parallel)
- **Tasks**: 06_refactor_crypto_uploads, 07_refactor_thread_safety
- **Verdict**: PASS
- **Report**: `_docs/03_implementation/batch_04_report.md`

### Batch 5: Cleanup (sequential, depended on batch 4)
- **Tasks**: 08_refactor_cleanup
- **Verdict**: PASS
- **Report**: `_docs/03_implementation/batch_05_report.md`

## Files Modified

| File | Changes |
|------|---------|
| security.pyx | C03: Library PKCS7 unpadder |
| binary_split.py | C04: Streaming PKCS7 unpadder |
| api_client.pyx | C09: CDN upload check, C10: error propagation, C07: dead methods removed |
| api_client.pxd | C07: dead declarations removed |
| main.py | C01: thread-safe singleton, C02: unlock state holder, C06: log os.remove |
| constants.pyx | C05: LOG_DIR env var, C08: dead constants removed, dead import removed |
| constants.pxd | C08: dead declarations removed |

## Blocked / Failed

None.

## Tracker Status

Jira not authenticated — task statuses not updated. Pending transitions:
- 06_refactor_crypto_uploads → Done
- 07_refactor_thread_safety → Done
- 08_refactor_cleanup → Done