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google-sheets-live-guard

Use together with Google Sheets work when editing an existing live spreadsheet, especially client-facing reports, row or tab insertion, tab moves, formula repairs, manually edited sheets, or any write that could duplicate rows/tabs or overwrite manual values.

plugins/nebelov/yandex-direct-for-all/skills/google-sheets-live-guard/SKILL.md

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Nov 6, 2026
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Apache-2.0

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# Google Sheets Live Guard

Use this skill as a local safety overlay whenever a task edits an existing Google Sheet. It supplements whatever Google Sheets tool or skill is installed (an API client, an MCP server or a separate `google-sheets` skill — none ships with this plugin). If one is installed, read its instructions first; if not, apply these guards to direct Sheets API calls.

## Live State Before Writes

- Treat old spreadsheet snapshots, prior row numbers, and earlier review notes as stale once the user, another agent, or the sheet itself may have changed.
- Immediately before a write, re-read spreadsheet metadata, target tabs, `sheetId` values, row labels, formulas, formats, validation, and nearby protected/manual cells that could be affected.
- For manually edited or cleaned sheets, prefer a rich read of current cells over displayed values only. Include formulas, effective values, user-entered values, formatting, validation, and chart or tab metadata when those surfaces affect the edit.
- A successful bounded CellData read can omit `rowData` or trailing `values` when every requested field is empty. Confirm the returned sheet and grid coordinates, then normalize omitted cells to empty objects; do not index `rowData[0]` unconditionally or mistake this valid empty-range response for an API failure. Non-success responses still require separate error handling.

## Idempotent Structure Changes

- Before inserting rows, creating tabs, duplicating report tabs, or moving tabs, check whether the requested row, section, or tab already exists in the live sheet.