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coronagraph-comparison SKILL.md skillA

coronagraph-comparison from peterwar/agentic-eclipse-library is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add peterwar/agentic-eclipse-library/coronagraph-comparison@git:20261028.95f0aec

Pins git:20261028.95f0aec in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: peterwar/agentic-eclipse-library
Path: skills/coronagraph-comparison/SKILL.md
Versions recorded: 5
Latest version: git:20261028.95f0aec, committed Oct 28, 2026
First version recorded: Oct 13, 2026
Size: 17,956 bytes
Repository stars: 3
License: MIT

Check a total-solar-eclipse image against independent instruments that saw the same corona — the K-Cor coronagraph (Mauna Loa), SOHO/LASCO C2 and C3, SDO/AIA — with the Agentic Eclipse Library's `ael.coronagraph`: STRUCTURE (are the rays and streamers where the instrument sees them? angular profiles ring by ring, a null from large rotations, fine detail below 12°, orientation, mirror state, prominences) and BRIGHTNESS in mean solar brightness (MSB, B/B☉) against K-Cor…

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

# Comparing an eclipse image with coronagraphs

What this skill does: it lets an agent say, with numbers and their limits, whether a processed or calibrated
eclipse image agrees with instruments that observed the same corona from space or from another site. It was
built on the 12 August 2026 eclipse (research notes 180 and 185; code in `3-RECERCA/tools/comparacio_sdo_lasco_20261001/`
and `3-RECERCA/tools/msb_calibrat_20261011/`), and turned into tested functions in `ael/coronagraph.py`.

Read the whole file before downloading or running anything. Run `python -m ael selftest` first.

## 0 · Two questions, never mixed

1. **Structure: where are the rays?** Each image is unrolled in its *own* solar coordinates, normalised
   radius by radius, and its angular profile in a ring is correlated with the instrument's. This compares
   *angles*. A radial tone curve `a(r)·I + b(r)` passes it unchanged, so a good structure result says
   nothing about brightness, and it does not exclude local artefacts.
2. **Brightness: how bright is it, in MSB?** Only for a *linear*, sky-subtracted and photometrically
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add peterwar/agentic-eclipse-library/coronagraph-comparison@sha256:9cd36fe037d474f0

The line at the top of this page pins the label git:20261028.95f0aec, 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_fplbsrsb5zcao33l.svg)](https://markdownregistry.com/a/art_fplbsrsb5zcao33l)

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

Versions

The registry has recorded 5 versions of this file, between Oct 13, 2026 and Oct 28, 2026, about one every 4 days.

version	committed	commit	size	audit
git:20261028.95f0aec latest	2026-10-28	95f0aec	17,956 B	A	view · diff
git:20261027.83da390	2026-10-27	83da390	17,945 B	A	view · diff
git:20261027.d9f4cba	2026-10-27	d9f4cba	17,049 B	A	view · diff
git:20261027.af14b9f	2026-10-27	af14b9f	16,526 B	A	view · diff
git:20261013.db5956c	2026-10-13	db5956c	11,188 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 (17956 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

peterwar/agentic-eclipse-library · 3 stars · license MIT · pushed 2026-11-02 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_fplbsrsb5zcao33l
GET https://markdownregistry.com/api/v1/resolve?ref=peterwar/agentic-eclipse-library/coronagraph-comparison
GET https://markdownregistry.com/api/v1/blob/9cd36fe037d474f0c28cef5ace5f63cc4942575ebf8bb8d8efa182ca2ec4c502

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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