41 lines
1.3 KiB
Markdown
41 lines
1.3 KiB
Markdown
---
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model: gpt-5.6-sol
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provider: openai
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service: opencode
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session: unavailable
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timestamp: 2026-07-27T20:47:11Z
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git_ref: 84a6d47b
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scope: code
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substantive: true
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raw_file: 20260727T204711Z_84a6d47b_prompt_io.raw.md
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---
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## Prompt
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The user identified that `backfiller_deep_fixes` introduced persistent
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`.parquet.lock` files, questioned whether Parquet or Arrow already handled
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writer coordination, and clarified that piker's `tractor` structured
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concurrency design already provides single-writer ownership through the
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persistent `datad` feed task. The user then asked to open the backfiller
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worktree and resolve the redundant locking.
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## Response summary
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Removed redundant actor-local and filesystem locking while preserving
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atomic crash-safe Parquet replacement. Replaced the synthetic contention
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test with regressions for the actual cross-branch failure: writes create
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no lock sidecars, and legacy lock artifacts are ignored during indexing.
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## Files changed
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- `piker/storage/nativedb.py` - rely on `datad` writer ownership
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- `tests/test_storage_nativedb.py` - lock-sidecar regressions
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- `ai/prompt-io/opencode/20260727T204711Z_84a6d47b_prompt_io.raw.md`
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- unedited response record
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- `ai/prompt-io/opencode/20260727T204711Z_84a6d47b_prompt_io.md`
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- provenance metadata and response summary
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## Human edits
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None - generated changes have not been edited by the human.
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