openpyxl-formula-editing SKILL.md skillA
openpyxl-formula-editing from cxcscmu/skilllearnbench is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cxcscmu/skilllearnbench/openpyxl-formula-editing@git:20260424.d50cf5aPins git:20260424.d50cf5a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cxcscmu/skilllearnbench
- Path
skills/b1-one-shot-claude-opus-4-6/weighted-gdp-calculation/openpyxl-formula-editing/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260424.d50cf5a, committed Apr 24, 2026
- Size
- 887 bytes
- Repository stars
- 91
- License
- MIT
Editing existing Excel files with openpyxl while preserving formatting and adding formulas.
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
# Editing Excel Files with openpyxl (Preserve Formatting)
## Load and Edit
```python
from openpyxl import load_workbook
wb = load_workbook('file.xlsx')
ws = wb['SheetName']
# Write formula to a cell (preserves existing formatting)
ws['H12'] = '=SOME_FORMULA()'
# Iterate over a range
for row in range(12, 18):
for col_letter in ['H', 'I', 'J', 'K', 'L']:
ws[f'{col_letter}{row}'] = f'=FORMULA({col_letter}...)'
wb.save('file.xlsx')
```
## Important Notes
- Assigning a value to a cell preserves its existing formatting (fill, font, borders)
- Formulas are stored as strings starting with '='
- Use `recalc.py` after saving to compute formula values
- Never open with `data_only=True` if you plan to save (destroys formulas)Read the whole file at its exact version.
How to install
mdr add cxcscmu/skilllearnbench/openpyxl-formula-editing@sha256:a24816543c99e1f0The line at the top of this page pins the label git:20260424.d50cf5a, 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.
[](https://markdownregistry.com/a/art_vapswy2n6tmbpk3g)
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Versions
The registry has recorded 1 version of this file, committed on Apr 24, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (887 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
cxcscmu/skilllearnbench · 91 stars · license MIT · pushed 2026-10-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vapswy2n6tmbpk3g GET https://markdownregistry.com/api/v1/resolve?ref=cxcscmu/skilllearnbench/openpyxl-formula-editing GET https://markdownregistry.com/api/v1/blob/a24816543c99e1f0f9bd8b2760ccdfd4b89a35e77c82b3dc155fd4e01b5b6bda
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.