# Spreadsheet Proof Gate Merged Fedf41 Merged

> The derived skill is complete and provides a meaningful enhancement:

- Skill: `ichichuang/spreadsheet-proof-gate-merged-fedf41-merged` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add ichichuang/spreadsheet-proof-gate-merged-fedf41-merged`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ichichuang/spreadsheet-proof-gate-merged-fedf41-merged/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Data & Analytics
- Author: ichichuang (https://skillmd.com/u/ichichuang)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/ichichuang/spreadsheet-proof-gate-merged-fedf41-merged

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The derived skill is complete and provides a meaningful enhancement:

1. **Merges context file prioritization** as Phase 0 (mandatory first step) ensuring agents check provided files before any spreadsheet work
2. **Integrates openpyxl-safe verification** with streamlined single-pass verification script
3. **Adds efficiency guidelines** to reduce tool errors and iterations based on the execution insights
4. **Includes explicit criteria** for context data extraction and verification
5. **Provides clear pass/fail reporting** with reconciliation requirements

This addresses the issues observed in the task execution:
- Agent will now audit context files FIRST (fixing the lack of proper context data prioritization)
- Single-pass openpyxl verification reduces tool calls and potential errors
- Explicit workflow guidance prevents the 27-iteration inefficiency observed