Home / francostino / opencode-skills-collection · GitHub

astropy SKILL.md skillA

This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.

astropy from francostino/opencode-skills-collection is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add francostino/opencode-skills-collection/astropy@git:20261104.a17e8c9

Pins git:20261104.a17e8c9 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: francostino/opencode-skills-collection
Path: bundled-skills/astropy/SKILL.md
Versions recorded: 4
Latest version: git:20261104.a17e8c9, committed Nov 4, 2026
First version recorded: Jul 7, 2026
Size: 11,585 bytes
Repository stars: 90
License: MIT

Astropy is the core Python package for astronomy, providing essential functionality for astronomical research and data analysis.

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

# Astropy

## Overview

Astropy is the core Python package for astronomy, providing essential functionality for astronomical research and data analysis. Use astropy for coordinate transformations, unit and quantity calculations, FITS file operations, cosmological calculations, precise time handling, tabular data manipulation, and astronomical image processing.

## When to Use This Skill

Use astropy when tasks involve:
- Converting between celestial coordinate systems (ICRS, Galactic, FK5, AltAz, etc.)
- Working with physical units and quantities (converting Jy to mJy, parsecs to km, etc.)
- Reading, writing, or manipulating FITS files (images or tables)
- Cosmological calculations (luminosity distance, lookback time, Hubble parameter)
- Precise time handling with different time scales (UTC, TAI, TT, TDB) and formats (JD, MJD, ISO)
- Table operations (reading catalogs, cross-matching, filtering, joining)
- WCS transformations between pixel and world coordinates
- Astronomical constants and calculations

## Quick Start

```python
import astropy.units as u
from astropy.coordinates import SkyCoord
from astropy.time import Time
from astropy.io import fits
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add francostino/opencode-skills-collection/astropy@sha256:a91713fc0b64aa22

The line at the top of this page pins the label git:20261104.a17e8c9, 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_qqmqjszaexn2sa62.svg)](https://markdownregistry.com/a/art_qqmqjszaexn2sa62)

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

Versions

The registry has recorded 4 versions of this file, between Jul 7, 2026 and Nov 4, 2026, about one every 40 days.

version	committed	commit	size	audit
git:20261104.a17e8c9 latest	2026-11-04	a17e8c9	11,585 B	A	view · diff
git:20261022.d57eeb6	2026-10-22	d57eeb6	11,585 B	A	view · diff
git:20260730.90257ed	2026-07-30	90257ed	11,560 B	A	view · diff
git:20260707.168343c	2026-07-07	168343c	11,559 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 (11585 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

francostino/opencode-skills-collection · 90 stars · license MIT · pushed 2026-11-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qqmqjszaexn2sa62
GET https://markdownregistry.com/api/v1/resolve?ref=francostino/opencode-skills-collection/astropy
GET https://markdownregistry.com/api/v1/blob/a91713fc0b64aa22f75d690df17731ede296b9e6df7a6c64494fcafd53214aab

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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