Eligible CSV Duplicate-Key Exceptions

From a CSV export, retain explicitly eligible records and produce a complete count-sorted list of repeated exact keys for manual resolution; do not silently deduplicate rows.

Processing stays in this browser; application code and assets require network downloads. Originals and checkpoints retain source content and are not redacted. Reset and Exit end this session’s owned work; they do not establish secure erasure, anonymity or global memory cleanup.

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About this flow

From a CSV export, retain explicitly eligible records and produce a complete count-sorted list of repeated exact keys for manual resolution; do not silently deduplicate rows.

Limitations

Input/each downstream input5MiB;50,000 data rows/500columns/500,000cells; emitted output20MiB but next5MiB still enforced.
Exact case/space/Unicode; only zero-length key excluded. No normalization, record merge or identity inference.
Frequency refuses no included data. A nonempty all-unique eligible input yields genuine header-only final TSV after repeated-only filter.
Stable equal counts retain first appearance. Percentage calculation is maintained Number/toFixed(6), rounded sum can differ from100; not financial precision.
Final formula protection changes eligible formula-like key spelling; original/early CSV remain literal. Private excluded fields remain in originals/checkpoints; no redaction.