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.
npx agentmods add skills/samtalki/agentrepl.jl/julia-pkgnpx skills add samtalki/AgentREPL.jl --skill julia-pkggit clone --depth 1 https://github.com/samtalki/AgentREPL.jlWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00021 | $0.00425 |
| Opus 5 | $0.00010 | $0.00212 |
| Sonnet 5 | $0.00004 | $0.00085 |
| Haiku 4.5 | $0.00002 | $0.00042 |
Grade A, and why
julia-pkg 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 3d 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.
What it actually says
Julia Package Management
Manage Julia packages in the current environment.
Arguments
action- One of: add, rm, status, update, instantiate, resolve, test, develop, freepackages- Package names or paths (required for add/rm/develop/free, optional for update/test)
Instructions
Parse the user's arguments to determine the action and packages:
| User Input | Action | Packages |
|---|---|---|
add JSON |
add | JSON |
add JSON DataFrames CSV |
add | JSON, DataFrames, CSV |
rm OldPackage |
rm | OldPackage |
status |
status | (none) |
update |
update | (none - updates all) |
update JSON |
update | JSON |
instantiate |
instantiate | (none) |
resolve |
resolve | (none) |
test |
test | (none - tests current project) |
test MyPackage |
test | MyPackage |
develop ./MyLocalPkg |
develop | ./MyLocalPkg |
free MyPackage |
free | MyPackage |
Call pkg with the appropriate action and packages parameters.
Notes
- After adding packages, remind the user to load them with
using PackageName - The
instantiateaction installs dependencies from Project.toml/Manifest.toml - The
testaction runs Pkg.test() - can be slow for large test suites - The
developaction puts a package in development mode (uses local code) - The
freeaction exits development mode (returns to registry version) - After
develop, consider usingrevise(action="revise")to hot-reload 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.
- 3d ago First seen · 47 lines · 21 tokens per session scan A 59bc32fccfac
julia-pkg is a skill published in the GitHub repository samtalki/AgentREPL.jl (6 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 21 tokens to every session and 425 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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