Skills xlsx-official

📦

xlsx-official

Name: xlsx-official
Author: sickn33

Content revision r1 High Risk ⚙️ External commands🌐 Network access📁 Filesystem access

Create Reliable Excel Workbooks

Spreadsheet work can lose formulas, formatting, and error checks during AI-assisted edits. This skill guides Claude, Codex, and Claude Code through workbook creation, analysis, recalculation, and verification.

Supports: Claude Codex Code(CC)

⚠️ 38 Poor

Stop for confirmation before installing.

Review the plan and obtain explicit user consent before changing files.

Install with my Agent

Copy this request to your Agent. It includes the canonical Skill page and manifest.

Agent request

Review the Skillstore skill "xlsx-official" from https://skillstore.io/skills/sickn33-xlsx-official.md and its manifest at https://skillstore.io/api/skills/sickn33-xlsx-official/manifest. Verify the artifact. Stop and obtain explicit user consent before installing or changing files.

Your Agent should still show its plan and request any confirmation required by the security policy.

Agent-readable resources

Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.

Markdown detail GET /skills/sickn33-xlsx-official.md Signed manifest GET /api/skills/sickn33-xlsx-official/manifest Signed lockfile GET /api/skills/sickn33-xlsx-official/lockfile

Test it

Using "xlsx-official". Create a sales tracker for four regions with monthly totals and a summary sheet.

Expected outcome:

Workbook with regional tabs, a summary tab, monthly total formulas, and formatted headers.
Formula verification summary showing whether recalculation found visible Excel errors.

Using "xlsx-official". Review this workbook for formula errors and formatting issues.

Expected outcome:

A concise review listing formula status, affected sheets, formatting inconsistencies, and recommended fixes.

Using "xlsx-official". Update this financial model with new revenue assumptions.

Expected outcome:

Updated assumption cells, linked projection formulas, preserved template styles, and source notes for changed hardcodes.

Security Audit

High Risk

v5 • 7/7/2026 Open versioned report

The runnable helper script executes LibreOffice and writes a StarBasic macro into the user LibreOffice profile, so real external-command and filesystem risks are present. The hardcoded URL is only an XML namespace, and most SKILL.md detections are Markdown fences or inline formatting. No prompt injection text was found in the reviewed files.

Files scanned

504

Lines analyzed

Review items

False positives ignored

Confirmed security concerns (1)

High

recalc.py:21-23 recalc.py:35-47

Persistent LibreOffice Macro Installation

recalc.py creates or uses the LibreOffice user macro directory and writes Module1.xba. This persists beyond one workbook operation and changes application configuration.

The script explicitly targets the LibreOffice user profile and writes a StarBasic macro file. The macro appears limited to recalculation, but the persistent profile modification is clear.

Capability review items (6)

These are real local capabilities that may be expected for this skill, so they require review but are not counted as confirmed malicious behavior.

High

recalc.py:31

Python subprocess.run

subprocess.run(['soffice', '--headless', '--terminate_after_init'],

Runs soffice as an external process during LibreOffice macro setup. Arguments are fixed and shell execution is not used, but the skill still invokes a local office binary automatically.

High

recalc.py:92

Python subprocess.run

result = subprocess.run(cmd, capture_output=True, text=True)

Runs a constructed command that opens and stores a user-selected workbook through LibreOffice. The command avoids shell injection, but it processes user files with an external application.

High

recalc.py:21

Hidden file in home directory

macro_dir = os.path.expanduser('~/.config/libreoffice/4/user/basic/Standard')

Targets the hidden LibreOffice user profile under the home directory. This is a persistent application configuration location, not a temporary workspace file.

High

recalc.py:21

Hidden file access

macro_dir = os.path.expanduser('~/.config/libreoffice/4/user/basic/Standard')

Accesses a hidden LibreOffice profile path in the user home directory. The access supports macro installation and should be treated as a real filesystem risk.

High

recalc.py:46

Python file write/append

with open(macro_file, 'w') as f:

Writes Module1.xba into the LibreOffice macro directory. The macro content appears limited to recalculation, but the write changes persistent application configuration.

Medium

recalc.py:33

Python os file operations

os.makedirs(macro_dir, exist_ok=True)

Creates the LibreOffice macro directory inside the user profile. This is expected for the helper script but still modifies persistent application state.

Audited by: codex View Audit History →

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Academic citations (APA · BibTeX · CFF)

APA citation

sickn33. (2026). xlsx-official security audit report (audit version 5) [Author version unspecified]. Skillstore. https://skillstore.io/skills/sickn33-xlsx-official/audits/5

BibTeX citation

@techreport{sickn33-sickn33-xlsx-official-2026,
  author = {sickn33},
  title = {xlsx-official security audit report (audit version 5)},
  institution = {Skillstore},
  year = {2026},
  number = {5},
  url = {https://skillstore.io/skills/sickn33-xlsx-official/audits/5},
  note = {Author version unspecified}
}

CITATION.cff

cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "xlsx-official security audit report (audit version 5)"
version: "unspecified"
type: report
authors:
  - name: "sickn33"
date-released: "2026-07-07"
url: "https://skillstore.io/skills/sickn33-xlsx-official/audits/5"
identifiers:
  - type: other
    value: "skillstore:sickn33-xlsx-official:audit:5"
    description: "Skillstore immutable audit report identifier"

Skillstore Score

Why this score Evidence Confidence: Medium

Architecture

Maintainability

Content

Community

Spec Compliance

What You Can Build

Build a Financial Model

Create a workbook with assumption cells, linked formulas, consistent formats, and zero visible formula errors.

Clean and Analyze Spreadsheet Data

Read multiple sheets, inspect structure, summarize trends, and export a cleaned workbook.

Update an Existing Template

Modify a workbook while preserving its styles, formulas, sheet structure, and source documentation.

Try These Prompts

Create a Basic Workbook

Create an Excel workbook for monthly expenses. Include input rows, summary formulas, clear headers, and a recalculation check.

Analyze a Dataset

Read the attached workbook, summarize each sheet, identify missing values, and create a clean analysis workbook with formulas.

Update a Template

Update this existing workbook with the new data while preserving formatting, formulas, sheet names, and source notes.

Build a Financial Model

Build a three-statement style financial model with assumptions, linked formulas, color coding, source notes, and formula error verification.

Best Practices

Keep assumptions in separate cells and reference them from formulas.
Recalculate and review formula errors before delivering any workbook.
Preserve existing template conventions when editing a user workbook.

Avoid

Do not replace formulas with hardcoded Python results.
Do not save a data-only workbook over a formula workbook.
Do not change established template formatting without a user request.

Frequently Asked Questions

Does this skill create Excel formulas?

Yes. It encourages formulas for calculations so workbooks stay updateable.

Can it edit existing files?

Yes. It uses openpyxl guidance to preserve workbook structure, formulas, and formatting.

How are formulas recalculated?

The recalc.py script opens the workbook with LibreOffice and refreshes formula values.

Does it require LibreOffice?

Formula recalculation requires LibreOffice. Basic pandas and openpyxl operations may work without it.

Is there a security consideration?

Yes. recalc.py can execute LibreOffice and write a local LibreOffice macro during setup.

Can it handle financial models?

Yes. It includes color, number format, assumption, and source documentation standards for financial models.

Developer Details

Author

sickn33

License

Proprietary. LICENSE.txt has complete terms

Skillstore revision

Version notice

The author did not declare a version.

Repository

https://github.com/sickn33/antigravity-awesome-skills/tree/main/skills/xlsx-official

Ref

f93e9bb0daca99badb6a7e574b97737155d57cb3

Maintenance freshness

7/18/2026

Usage

6 downloads · 188 views

File structure

📄 LICENSE.txt

📄 recalc.py

📄 SKILL.md

xlsx-official

Install with my Agent

Agent-readable resources

Test it

Security Audit

Confirmed security concerns (1)

Risk Factors

Copy report link

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Embed card

APA citation

BibTeX citation

CITATION.cff

Skillstore Score

What You Can Build

Build a Financial Model

Clean and Analyze Spreadsheet Data

Update an Existing Template

Try These Prompts

Best Practices

Avoid

Frequently Asked Questions

Developer Details