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/phobologic/claude_code_helpers/use-railwaynpx skills add phobologic/claude_code_helpers --skill use-railwaygit clone --depth 1 https://github.com/phobologic/claude_code_helpersWrote 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/phobologic/claude_code_helpers/use-railway)<a href="https://agentmods.dev/skills/phobologic/claude_code_helpers/use-railway"><img src="https://agentmods.dev/badge/skills/phobologic/claude_code_helpers/use-railway.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 | $0.00025 | $0.00210 |
| Opus 5 | $0.00013 | $0.00105 |
| Sonnet 5 | $0.00005 | $0.00042 |
| Haiku 4.5 | $0.00003 | $0.00021 |
Grade A, and why
use-railway 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 4d 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
Set up Railway CLI rules for this project by creating a symlink into .claude/rules/.
Steps:
- Create
.claude/rules/if it doesn't exist - Check if
.claude/rules/railway.mdalready exists (as a file or symlink)- If it already points to the correct target, report "already set up" and stop
- If it exists but points elsewhere, report the conflict and stop — don't overwrite
- Create the symlink:
ln -s ~/git/claude_code/tools/railway.md .claude/rules/railway.md - Confirm success
This makes Railway CLI conventions available in this project automatically. The source file lives in ~/git/claude_code/tools/railway.md.
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.
- 4d ago First seen · 19 lines · 25 tokens per session scan A 36f13846d871
use-railway is a skill published in the GitHub repository phobologic/claude_code_helpers (5 stars, last pushed 1mo ago), licensed MIT. It adds 25 tokens to every session and 210 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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