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spreadsheet-authoring SKILL.md skillA

spreadsheet-authoring from vargasjr-dev/mycadet-temp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add vargasjr-dev/mycadet-temp/spreadsheet-authoring@git:20261007.cbfc397

Pins git:20261007.cbfc397 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: vargasjr-dev/mycadet-temp
Path: skills/spreadsheet-authoring/SKILL.md
Versions recorded: 2
Latest version: git:20261007.cbfc397, committed Oct 7, 2026
First version recorded: Sep 24, 2026
Size: 6,543 bytes
Repository stars: 58
License: MIT

Create and edit Excel spreadsheets (.xlsx) whose formulas carry their computed values, so sums and totals show in every viewer, plus date and time formats, recalculating and verifying an existing workbook.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Spreadsheet Authoring

Write workbooks whose numbers are visible everywhere they are opened.

## A formula is stored with the value it produced

An `.xlsx` cell holding a formula stores two things: the formula text, and the
value that formula last produced. Excel fills the value in when it saves.
openpyxl writes none, because it has no formula engine.

Anything that does not run a formula engine shows what the file stores. Chat
file previews, Quick Look, Google Drive previews, and mail previews all read
the stored value, so a workbook written by openpyxl shows `=SUM(C2:C7)` where
the total should be, and a summary sheet of formulas comes out blank.

So: write the computed value next to every formula. Compute it in Python,
where the data already is.

## Install the two packages first

Both come from PyPI and neither is there by default. Run this once at the
start of the task; the import check makes it a no-op when they are already
installed.

```bash
python3 -c "import xlsxwriter, openpyxl" 2>/dev/null \
  || pip install --user --quiet XlsxWriter==3.2.9 openpyxl==3.1.5 \
  || pip install --user --quiet --break-system-packages XlsxWriter==3.2.9 openpyxl==3.1.5
```
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add vargasjr-dev/mycadet-temp/spreadsheet-authoring@sha256:6eedb598231503e8

The line at the top of this page pins the label git:20261007.cbfc397, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_l6srdrtom3fe7643.svg)](https://markdownregistry.com/a/art_l6srdrtom3fe7643)

0 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Sep 24, 2026 and Oct 7, 2026, about one every 13 days.

version	committed	commit	size	audit
git:20261007.cbfc397 latest	2026-10-07	cbfc397	6,543 B	A	view · diff
git:20260924.5a6d38c	2026-09-24	5a6d38c	6,544 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (6543 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

vargasjr-dev/mycadet-temp · 58 stars · license MIT · pushed 2026-11-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_l6srdrtom3fe7643
GET https://markdownregistry.com/api/v1/resolve?ref=vargasjr-dev/mycadet-temp/spreadsheet-authoring
GET https://markdownregistry.com/api/v1/blob/6eedb598231503e80293fb8ec8c0f1fb2946005267ea6eaae376d6bbfa3d209c

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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