---
model: gpt-5.6-sol
provider: openai
service: opencode
timestamp: 2026-07-28T23:27:18Z
git_ref: ed85721c
diff_cmd: git diff HEAD~1..HEAD
---

> `git diff HEAD~1..HEAD -- piker/storage/nativedb.py tests/test_storage_nativedb.py`

Fixed incremental NativeDB updates against legacy persisted history with
non-positive timestamps. Incoming provider frames remain strictly validated,
while merge repair discards invalid persisted rows before concat, dedupe,
ordering, canonical-index rewrite, and atomic publication.

The regression reproduces the observed MNQ baseline shape: one epoch-zero
row, noncanonical absolute indexes, extra derived columns, and a valid fresh
IB frame. It proves the invalid row is removed while all valid old and new
bars survive with canonical indexes.

Verification generated with the patch:

- NativeDB regressions: 18 passed
- history backfill regressions: 6 passed
- focused Ruff: passed
- `git diff --check`: passed
