polars SKILL.md skillA
polars from foryourhealth111-pixel/vibe-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add foryourhealth111-pixel/vibe-skills/polars@git:20260303.491ea97Pins git:20260303.491ea97 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- foryourhealth111-pixel/vibe-skills
- Path
bundled/skills/polars/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260303.491ea97, committed Mar 3, 2026
- Size
- 9,430 bytes
- Repository stars
- 3,805
- License
- Apache-2.0
Fast in-memory DataFrame library for datasets that fit in RAM. Use when pandas is too slow but data still fits in memory. Lazy evaluation, parallel execution, Apache Arrow backend. Best for 1-100GB datasets, ETL pipelines, faster pandas replacement. For larger-than-RAM data use dask or vaex.
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
# Polars
## Overview
Polars is a lightning-fast DataFrame library for Python and Rust built on Apache Arrow. Work with Polars' expression-based API, lazy evaluation framework, and high-performance data manipulation capabilities for efficient data processing, pandas migration, and data pipeline optimization.
## Quick Start
### Installation and Basic Usage
Install Polars:
```python
uv pip install polars
```
Basic DataFrame creation and operations:
```python
import polars as pl
# Create DataFrame
df = pl.DataFrame({
"name": ["Alice", "Bob", "Charlie"],
"age": [25, 30, 35],
"city": ["NY", "LA", "SF"]
})
# Select columns
df.select("name", "age")
# Filter rows
df.filter(pl.col("age") > 25)
# Add computed columns
df.with_columns(
age_plus_10=pl.col("age") + 10
)
```
## Core Concepts
### Expressions
Expressions are the fundamental building blocks of Polars operations. They describe transformations on data and can be composed, reused, and optimized.
**Key principles:**
- Use `pl.col("column_name")` to reference columns
- Chain methods to build complex transformations
…Read the whole file at its exact version.
How to install
mdr add foryourhealth111-pixel/vibe-skills/polars@sha256:b7839f79ef81ec00The line at the top of this page pins the label git:20260303.491ea97, 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_djbov7bgiurfmlpa)
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Versions
The registry has recorded 1 version of this file, committed on Mar 3, 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 (9430 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
foryourhealth111-pixel/vibe-skills · 3,805 stars · license Apache-2.0 · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_djbov7bgiurfmlpa GET https://markdownregistry.com/api/v1/resolve?ref=foryourhealth111-pixel/vibe-skills/polars GET https://markdownregistry.com/api/v1/blob/b7839f79ef81ec000b041c5f59439de6155d154388bea6f5be019ec101598ddb
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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