julia-info

julia-info is a skill for Claude Code, Codex from samtalki/AgentREPL.jl. It costs 22 tokens per session (209 once invoked), scanned A, original, Apache-2.0.

A Julia session information report. Julia is a programming language often used for scientific and technical computing.

In plain words
What is it for?
Use it to inspect the current project, loaded packages, variables, Revise.jl availability, worker process, and session status.
Why use it?
It shows which Julia version and project are active, what variables and modules are loaded, and whether the session is still working as expected.

Skill for Claude CodeCodex

Part of the julia plugin — 10 skills, 1 hook, 1 MCP server shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/samtalki/agentrepl.jl/julia-info
Any agent
npx skills add samtalki/AgentREPL.jl --skill julia-info
Clone the repo
git clone --depth 1 https://github.com/samtalki/AgentREPL.jl

Made for: Claude Code, Codex.

Or install julia, the plugin that ships this one along with the rest of its 10 skills, 1 hook, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for julia-info

README.md
[![agentmods](https://agentmods.dev/badge/skills/samtalki/agentrepl.jl/julia-info.svg)](https://agentmods.dev/skills/samtalki/agentrepl.jl/julia-info)
Your own site
<a href="https://agentmods.dev/skills/samtalki/agentrepl.jl/julia-info"><img src="https://agentmods.dev/badge/skills/samtalki/agentrepl.jl/julia-info.svg" alt="Measured on agentmods" height="20"></a>
Per session 22 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 209 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00022 $0.00209
Opus 5 $0.00011 $0.00105
Sonnet 5 $0.00004 $0.00042
Haiku 4.5 $0.00002 $0.00021

Measured 5d ago against content hash 203803351066, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

julia-info scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

claude-plugin/skills/julia-info/SKILL.md · 33 lines

What it actually says

Julia Info

Display information about the current Julia session.

Instructions

  1. If the user provides a session name argument, pass it as the session parameter
  2. Call the info MCP tool
  3. Present the information clearly to the user:
    • Session name and current status
    • Julia version
    • Active project path
    • Revise.jl availability
    • User-defined variables with types and sizes
    • Number of loaded modules
    • Worker process ID

Use Cases

  • Check what variables exist from previous work
  • Verify which Julia version is running
  • See the active project environment
  • Check if Revise.jl is loaded
  • Confirm the worker is alive and which ID it has
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 33 lines · 22 tokens per session scan A 203803351066

Subscribe to this mod's changes

julia-info is a skill published in the GitHub repository samtalki/AgentREPL.jl (6 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 22 tokens to every session and 209 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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