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 AdamBien/airails --skill python-to-javagit clone --depth 1 https://github.com/AdamBien/airailsWrote 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/adambien/airails/python-to-java)<a href="https://agentmods.dev/skills/adambien/airails/python-to-java"><img src="https://agentmods.dev/badge/skills/adambien/airails/python-to-java/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/adambien/airails/python-to-java"><img src="https://agentmods.dev/badge/skills/adambien/airails/python-to-java.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00118 | $0.00423 |
| Opus 5.5 | $0.00047 | $0.00169 |
| Sonnet 5.5 | $0.00024 | $0.00085 |
| Haiku 4.5 | $0.00012 | $0.00042 |
Grade A, and why
python-to-java 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 1mo 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
Python to Java Migration
Convert Python scripts to idiomatic Java 25 CLI programs with zero external dependencies.
Decision: Single-File vs Multi-File
Evaluate before writing any code:
- Start with
/java-cli-script— one Java file per Python script, no build tool - Switch to
/java-cli-appwhen any of these apply:- Multiple scripts share >100 lines of identical code (e.g. domain records)
- A single script exceeds ~500 lines
- Scripts import from each other in Python (
from module import func)
When switching to /java-cli-app, extract shared code into common source files within the multi-file project.
Migration Process
- Read all Python scripts — understand dependencies between them (
importgraph) - Identify shared code —
utils.py, common helpers, shared data classes - Decide single-file vs multi-file per the rules above
- Translate each script using the idiom mapping below
- Verify — run each script with
-versionto confirm compilation
Python to Java 25 Idiom Mapping
See references/idiom-mapping.md for the complete translation table covering argument parsing, file I/O, subprocess management, concurrency, and standard library equivalents.
What ships with it
1 file 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.
- 1mo ago First seen · 41 lines · 118 tokens per session scan A 7ec30f86be5c
python-to-java is a skill published in the GitHub repository AdamBien/airails (58 stars, last pushed 3d ago), licensed MIT. It adds 118 tokens to every session and 423 once invoked, about $0.0005 per session on Opus 5.5. 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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