---
model: gpt-5.6-sol
provider: openai
service: opencode
session: 24fb9765-a550-4570-8350-f0fc9b7e17db
timestamp: 2026-07-28T23:27:18Z
git_ref: ed85721c
scope: code
substantive: true
raw_file: 20260728T232718Z_ed85721c_prompt_io.raw.md
---

## Prompt

Diagnose the live `pikerd` failure where backfill publication raised
`ValueError: OHLCV timestamps must be finite and positive` while merging the
known gappy MNQ NativeDB baseline with fresh IB history. Determine whether to
commit the pending audit stack or iterate first.

## Response summary

Traced the primary failure through `publish_latest_frame()` to
`NativeStorageClient.update_ohlcv()`. The incoming frame was valid, but the
canonicalized persisted baseline retained its epoch-zero row and caused the
merged frame to fail validation. Added persisted-row repair before merge and
a regression using the observed legacy schema characteristics.

## Files changed

- `piker/storage/nativedb.py` - drop non-positive persisted rows during merge
- `tests/test_storage_nativedb.py` - live MNQ failure-shape regression
- `ai/prompt-io/opencode/20260728T232718Z_ed85721c_prompt_io.raw.md`
  - unedited response record
- `ai/prompt-io/opencode/20260728T232718Z_ed85721c_prompt_io.md`
  - provenance metadata and response summary

## Human edits

None - generated changes have not been edited by the human.