Prevent calibration evidence response overwrite

docs/CODEX_EXECUTION_LOG.md

@@ -5495,3 +5495,19 @@ Limitations:
 
 Next recommended pass:
 - Continue with V1 usability work that reduces operator confusion without expanding frozen product scope.
+
+## Sprint 142 Calibration evidence response uniqueness (2026-07-08)
+
+Changed:
+- Hardened `scripts/export_detection_calibration_evidence.sh` so calibration evidence response files include both confidence threshold and quality-check id.
+- Prevented same-threshold runs from different model assets or calibration jobs from overwriting each other before portfolio assembly.
+- Extended the multi-AOI calibration evidence portfolio regression test with two Geel runs at the same threshold and distinct quality checks.
+
+Tested:
+- Red step: `python -m pytest backend\tests\test_sprint139_multi_aoi_calibration_evidence_portfolio.py -q` failed because only two evidence features were retained when three same-threshold responses were expected.
+- `python -m pytest backend\tests\test_sprint139_multi_aoi_calibration_evidence_portfolio.py backend\tests\test_sprint138_calibration_evidence_bundle_smoke.py backend\tests\test_sprint137_browser_calibration_summary_evidence_script.py backend\tests\test_sprint125_detection_calibration_evidence_bundle.py -q` (`4 passed`)
+- `bash -n scripts/export_detection_calibration_evidence.sh`
+- `bash -n scripts/assemble_detection_calibration_evidence_portfolio.sh`
+
+Open:
+- Regenerate the expanded Tower calibration evidence portfolio after deploying this fix so same-threshold model comparisons are represented correctly.

docs/TODO.md

@@ -429,5 +429,6 @@ This file now starts with the current implementation status. Older preparation/b
 - [x] Run the first live multi-AOI calibration evidence portfolio on Tower for Geel, Mol and Turnhout.
 - [x] Run fresh positive-AOI matrix coverage for Balen, Herentals and Westerlo.
 - [x] Preserve model/tile provenance in calibration evidence bundle summaries.
+- [x] Prevent same-threshold calibration evidence responses from overwriting each other in multi-model portfolios.
 - [ ] Add more AOIs after the tile-level baseline so the next local model attempt is not limited to Geel/Mol/Turnhout.
 - [ ] Add negative/background AOIs so the next tile dataset is not all positive tiles.