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 skills add Krastanov/JuliaLLMAgentSkills --skill optimize-julia-codegit clone --depth 1 https://github.com/Krastanov/JuliaLLMAgentSkillsWrote 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.
[](https://agentmods.dev/skills/krastanov/juliallmagentskills/optimize-julia-code)<a href="https://agentmods.dev/skills/krastanov/juliallmagentskills/optimize-julia-code"><img src="https://agentmods.dev/badge/skills/krastanov/juliallmagentskills/optimize-julia-code.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00061 | $0.00330 |
| Opus 5 | $0.00030 | $0.00165 |
| Sonnet 5 | $0.00012 | $0.00066 |
| Haiku 4.5 | $0.00006 | $0.00033 |
Grade A, and why
optimize-julia-code 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 8d 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
Optimize Julia Code
Optimize an observed workload, preserve its behavior, and remeasure every change.
Workflow
- Define representative inputs and record a correct baseline.
- Establish repeatable timing and allocation measurements. Read measurement-and-benchmarks.md.
- Locate time or allocation hotspots before editing. Read profiling-and-allocations.md.
- Inspect inference and memory access only where measurements point. Read inference-and-data-layout.md.
- Apply annotations, concurrency, or specialized tooling only after simpler changes. Read advanced-optimization.md.
- Run correctness tests and the original measurement after each focused change. Keep only improvements that hold on representative inputs.
Boundaries
- Separate first-call latency from steady-state runtime.
- Prefer algorithmic and data-movement improvements over syntax-level tweaks.
- Do not make argument types concrete merely for speed; Julia specializes on actual argument types.
- Do not add an optimization package without a measured bottleneck, a current compatibility check, and a benchmark against Base Julia.
- Report the workload, Julia version, thread configuration, inputs, and measurement method with performance conclusions.
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 26 lines · 61 tokens per session scan A 40258e7410a4
optimize-julia-code is a skill published in the GitHub repository Krastanov/JuliaLLMAgentSkills (30 stars, last pushed 1mo ago), licensed Unlicense. It adds 61 tokens to every session and 330 once invoked, about $0.0003 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 2026-08-30.
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