developing-julia-package SKILL.md skillA
developing-julia-package from hashgraph-online/awesome-codex-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hashgraph-online/awesome-codex-plugins/developing-julia-package@git:20260520.85bed5bPins git:20260520.85bed5b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hashgraph-online/awesome-codex-plugins
- Path
plugins/AtelierArith/atelier-arith-julia-development-skills/skills/developing-julia-package/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260520.85bed5b, committed May 20, 2026
- Size
- 4,511 bytes
- Repository stars
- 1,537
- License
- Apache-2.0
Use when you write a Julia package.
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
# Developing a Julia package
Notes on developing Julia packages.
Assume the package is named `MyPkg`. Substitute your actual package name wherever `MyPkg` appears.
Use `src/MyPkg.jl` as the package entry point. Keep the module declaration, exports, and `include` list there; put substantial implementation in focused files under `src/`.
```julia
module MyPkg
export fit_model, FitResult, GaussianModel
include("models.jl")
include("fit.jl")
include("preprocess.jl")
end
```
Split files to improve readability, not to recreate Python-style class or submodule hierarchies. Prefer one public module unless there is a real user-facing namespace boundary.
Guidelines below.
## Avoid excessive `export`s
- Do not `export` helpers that are only used internally just so tests can reach them. Prefer importing explicitly in tests:
```julia
# test/runtests.jl
using Test
using MyPkg: <internal-only helper>
```
Test public behavior through the public API first. Import internals only when the helper has meaningful behavior that is hard to exercise through the public path:
```julia
using Test
using MyPkg
using MyPkg: initial_guess
@testset "fit_model" begin
…Read the whole file at its exact version.
How to install
mdr add hashgraph-online/awesome-codex-plugins/developing-julia-package@sha256:b5ea01e05b5a0d1dThe line at the top of this page pins the label git:20260520.85bed5b, 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_yigmiae7nfvktt5y)
7 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 20, 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 (4511 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
hashgraph-online/awesome-codex-plugins · 1,537 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yigmiae7nfvktt5y GET https://markdownregistry.com/api/v1/resolve?ref=hashgraph-online/awesome-codex-plugins/developing-julia-package GET https://markdownregistry.com/api/v1/blob/b5ea01e05b5a0d1d26c4774fd1b2d8b52235e2f54dc542cb9ff69223f7d44827
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.