analytics-hand-skill SKILL.md skillA
analytics-hand-skill from librefang/librefang is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add librefang/librefang/analytics-hand-skill@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- librefang/librefang
- Path
crates/librefang-runtime/tests/fixtures/registry/hands/analytics/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Jul 10, 2026
- Size
- 35,845 bytes
- Repository stars
- 393
- License
- MIT
Expert knowledge for AI data analytics -- statistical methods, visualization best practices, pandas reference, and reporting patterns.
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
# Data Analytics Expert Knowledge
## pandas Quick Reference
### Data Loading
```python
import pandas as pd
# CSV
df = pd.read_csv('data.csv')
df = pd.read_csv('data.csv', parse_dates=['date_col'], index_col='id')
# JSON
df = pd.read_json('data.json')
df = pd.read_json('data.json', orient='records')
# Excel
df = pd.read_excel('data.xlsx', sheet_name='Sheet1')
# From dict
df = pd.DataFrame({'col1': [1, 2, 3], 'col2': ['a', 'b', 'c']})
```
### Data Inspection
```python
df.shape # (rows, columns)
df.dtypes # Column types
df.info() # Summary including memory usage
df.describe() # Statistical summary
df.head(10) # First 10 rows
df.isnull().sum() # Missing values per column
df.duplicated().sum() # Number of duplicate rows
df.nunique() # Unique values per column
```
### Data Cleaning
```python
# Handle missing values
df.dropna() # Drop rows with any NaN
df.fillna(0) # Fill NaN with 0
df.fillna(df.mean()) # Fill with column means
df['col'].interpolate() # Interpolate missing values
# Remove duplicates
df.drop_duplicates()
…Read the whole file at its exact version.
How to install
mdr add librefang/librefang/analytics-hand-skill@sha256:59e95c235cf6ae0bThe line at the top of this page pins the label v1.0.0, 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_pgnwgxmwxhk3rrxe)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 10, 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 (35845 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
librefang/librefang · 393 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pgnwgxmwxhk3rrxe GET https://markdownregistry.com/api/v1/resolve?ref=librefang/librefang/analytics-hand-skill GET https://markdownregistry.com/api/v1/blob/59e95c235cf6ae0bdeb37f281052c155c4a755f27daf4e41ef00f35797dc0cdf
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.