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piker/ai/prompt-io/opencode/20260727T204711Z_84a6d47b_p...

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Prompt

The user identified that backfiller_deep_fixes introduced persistent .parquet.lock files, questioned whether Parquet or Arrow already handled writer coordination, and clarified that piker’s tractor structured concurrency design already provides single-writer ownership through the persistent datad feed task. The user then asked to open the backfiller worktree and resolve the redundant locking.

Response summary

Removed redundant actor-local and filesystem locking while preserving atomic crash-safe Parquet replacement. Replaced the synthetic contention test with regressions for the actual cross-branch failure: writes create no lock sidecars, and legacy lock artifacts are ignored during indexing.

Files changed

  • piker/storage/nativedb.py - rely on datad writer ownership
  • tests/test_storage_nativedb.py - lock-sidecar regressions
  • ai/prompt-io/opencode/20260727T204711Z_84a6d47b_prompt_io.raw.md
    • unedited response record
  • ai/prompt-io/opencode/20260727T204711Z_84a6d47b_prompt_io.md
    • provenance metadata and response summary

Human edits

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