Julia - AI Skill for Claude, ChatGPT & Any AI Chat

Name: AI Skill for Julia
Brand: KissMySkills
Price: 19 USD
Availability: InStock

AI Skill for Julia

Turn Claude into a senior Julia pair programmer who writes fast, type-stable code and fixes your environment.

$19 this skill one payment yours forever

Prompt file instant downloadai-skill-for-julia.txt

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Costs about the same as 2 months of Library.

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How it works

Ask it something hard.

📎 ai-skill-for-julia.txtLOADED ✓

This loop summing x^2 over a Float64 vector is slow in the REPL. Why, and how do I fix it?

CLAUDE · WITH THIS SKILL You get: the cause in one line (non-const globals stop type inference, so every iteration boxes) -> a type-stable sumsq function using zero(eltype(v)) and @inbounds -> the BenchmarkTools call with $data interpolation and the @code_warntype check to run -> what to look for in the output (no red Any) -> a one-line why on functions vs top-level code -> the single next action: compare allocations, the function should report 0 bytes.

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Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com

// the file itself

Read it before you buy it.

The first lines of the file your AI will read, exactly as delivered. Nothing rewritten for the page.

// the skill your AI runs on

You are a senior Julia pair programmer sitting next to the user while they write numerical and scientific code. You have been activated to hand over code that runs in the REPL, benchmarks with BenchmarkTools, and reviews that catch type instability.

KissMySkills.com | Install: paste this whole file into Claude Projects (Project instructions), a custom GPT (Instructions), a Gemini Gem, or your AI's system prompt. Then just ask questions the way you normally would. You are a senior Julia pair programmer sitting next to the user while they write numerical, scientific and data code. You know the type system and multiple dispatch, the performance rules that make Julia fast or slow, the package manager and the main scientific packages. You hand over code that runs in the REPL, benchmarks that show whether it is fast, and reviews that catch type instability early. You are the helper inside the user's Julia work, not a job-role persona. Tone: direct, practical, code first. · Language: multiple dispatch, abstract and concrete types, parametric types, structs and mutable structs, broadcasting with dot syntax, comprehensions, do-blocks, macros, modules. · Performance rules: type stability, no non-const globals, preallocation, in-place functions ending in !, @views, column-major layout, abstract fields in structs, safe use of @inbounds and @simd. · Diagnostics: @code_warntype, @time, @allocated, BenchmarkTools (@btime, @benchmark), Profile and ProfileView, JET, Cthulhu. · Pkg: the ] REPL mode, add, rm, update, status, activate, instantiate, Project.toml and Manifest.toml, compat entries, dev, PkgTemplates. · REPL modes: help (?), shell (;), Pkg (]); Revise.jl for live reloading; startup.jl. · Arrays: Base arrays, LinearAlgebra, SparseArrays, StaticArrays, views, reshaping, broadcast fusion. · Data: DataFrames.jl, CSV.jl, Arrow.jl, JSON3.jl, Dates, Statistics, StatsBase, Distributions. · Scientific stack: DifferentialEquations.jl, Optimization.jl, JuMP, Flux.jl and Lux.jl, Zygote and ForwardDiff, Turing.jl, Symbolics.jl. · Plotting: Plots.jl (GR default, PlotlyJS), Makie (CairoMakie, GLMakie), StatsPlots. · Parallelism: Threads.@threads and @spawn, Distributed with pmap, Channels, CUDA.jl. · Interop: PythonCall, RCall, ccall. · Tooling: juliaup, VS Code Julia extension, Pluto, IJulia, PackageCompiler.

88 lines · .txt · instant download

// what's inside

What's inside this skill

REPL-ready functions with using statements and docstrings
Type stability fixes with @code_warntype and @btime verification steps
Exact Pkg command sequences for broken environments
DataFrames.jl, JuMP, DifferentialEquations.jl and Plots.jl code

Scientists, quants, engineers and data developers who write numerical code in Julia every day.

// two ways to get it

Use it inside your AI, or download it once.

Library plan

This skill and 2,500+ others, inside your chat

$9/mo cancel anytime, or $59 a year

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Nothing to download or paste: connect once in Claude, ChatGPT, Claude Code or Cursor
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Works with

Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.

// ask your assistant

Or let your AI set up this skill for you.

Go to kissmyskills.com/pages/connector and set up the "AI Skill for Julia" skill (handle: ai-skill-for-julia) for me

Paste it into Claude, ChatGPT, Claude Code, Cursor or Codex. Your AI walks you through connecting KissMySkills (about 3 minutes, 7-day free trial) and loads the skill. What your AI will read →

What you're actually buying

This Claude/ChatGPT skill is a Julia AI pair programmer inside your daily scientific and data work: it writes REPL-ready functions with docstrings, rewrites slow loops into type-stable code and shows the @code_warntype and @btime commands to prove it, explains MethodError and BoundsError traces, repairs broken Project.toml and Manifest.toml environments with exact Pkg commands, and builds DataFrames.jl, DifferentialEquations.jl, JuMP and Plots.jl code for your problem.

It knows multiple dispatch, the performance rules around globals, allocations and column-major arrays, the Pkg REPL modes, threading and Distributed, and how to translate NumPy, pandas or MATLAB into idiomatic Julia. It is a helper in your Julia work, not a job-role persona, and it does not run or benchmark code itself; it gives you the code and the exact check to run.

Works the same way in Claude, ChatGPT and Gemini. One purchase, download the file, install it in under 2 minutes, then paste your code or error and get a fix with the reasoning.

// how to install Under 2 minutes

Four steps. Any AI chat.

01
Download the file
After checkout, the download link lands in your inbox. Save the .txt file anywhere on your device.
02
Open your AI chat
Any AI chat you already use: Claude, ChatGPT, Gemini, Grok, Copilot or another.
03
Paste the prompt
Open the .txt file, copy the prompt section and paste it into Claude or ChatGPT - or add it to a Project so it is always there.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.

No technical knowledge required.

With Library there is nothing to download. Connect your AI once, then ask for any skill by name.

Setup guide → Library · $9/mo →

// faq

Questions about this product

What does the AI Skill for Julia do?+

It turns Claude or ChatGPT into a Julia AI pair programmer that writes type-stable Julia code, diagnoses slow loops and MethodErrors, fixes Pkg environments, and builds DataFrames.jl, JuMP, DifferentialEquations.jl and Plots.jl code for your problem.

Does it run or benchmark my Julia code for me?+

No. It does not execute anything. It gives you the Julia code plus the exact @btime, @code_warntype or Pkg commands to run in your REPL so you can verify the result yourself.

Can it help translate Python or MATLAB code to Julia?+

Yes. It rewrites NumPy, pandas or MATLAB code into idiomatic Julia, flags the 1-based indexing, broadcasting and mutation differences, and names the matching Julia packages.

Does it know the Julia scientific packages?+

Yes. It writes code for DataFrames.jl, CSV.jl, DifferentialEquations.jl, JuMP, Flux.jl, Turing.jl, Plots.jl and Makie, and tells you when to check the package docs for a solver option it is not certain about in your Julia version.