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 PaulRBerg/agent-skills --skill cli-castgit clone --depth 1 https://github.com/PaulRBerg/agent-skillsWrote 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/paulrberg/agent-skills/cli-cast)<a href="https://agentmods.dev/skills/paulrberg/agent-skills/cli-cast"><img src="https://agentmods.dev/badge/skills/paulrberg/agent-skills/cli-cast.svg" alt="Measured on agentmods" 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 | $0.00045 | $0.01748 |
| Opus 5 | $0.00023 | $0.00874 |
| Sonnet 5 | $0.00009 | $0.00350 |
| Haiku 4.5 | $0.00005 | $0.00175 |
Grade A, and why
cli-cast 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 today.
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.
How it starts
The opening of the file, as written. The whole thing — 136 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Foundry Cast CLI
This skill is coordination-exempt: skip the ai-coord gate for its declared work.
Separate read, preparation, simulation, signing, and broadcast so no state-changing action is hidden inside command construction.
Resolve Chain and Provider
Invoke $evm-atlas before every network operation. It owns chain resolution, discrete reads, and bounded live
subscriptions. Pass the explicit chain name or ID, JSON-RPC method and exact parameters or call object, block selector
or checkpoint requirement, and why the result is needed. Require its read packet containing the resolved chain name and
ID, provider route, result, observed block or checkpoint, and coverage gaps.
If the chain is absent from evm-atlas, stop RPC-dependent work. Do not accept an arbitrary RPC URL as an escape hatch
and never infer Ethereum when the chain is ambiguous.
Use an RPC URL in this skill only for a trace, fork, or send flow that cannot be expressed as bounded discrete reads.
For RouteMesh-backed continuous transport, first require evm-atlas to confirm current RouteMesh coverage, then use the
explicit Foundry alias when it is configured:
ROUTEMESH_CHAIN_ID="$CHAIN_ID" cast COMMAND --rpc-url routemesh
Otherwise use the nonsecret public RPC verified by evm-atlas. Never construct, inspect, or print a RouteMesh URL.
Treat Cast stderr as secret-bearing because Foundry may reveal a resolved alias URL on transport failure; never repeat
that output in chat, logs, or external reports.
Authority Phases
Read
Local ABI encoding/decoding and selector derivation may run without transaction approval. Delegate chain, block, fee,
nonce, eth_call, eth_estimateGas, transaction, receipt, log, balance, code, storage, proof, and ENS reads to
$evm-atlas, including reads needed to prepare or verify a transaction. Do not ask evm-atlas to hand a read back to
this skill merely because later work may change state.
Use current cast <command> --help for exact local syntax. Typical local operations:
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.
- today Changed · +2 lines 7c3cf8eec390
- 8d ago First seen · 134 lines · 45 tokens per session scan A 9814068f1b0f
cli-cast is a skill published in the GitHub repository PaulRBerg/agent-skills (70 stars, last pushed today), licensed MIT. It adds 45 tokens to every session and 1,748 once invoked, about $0.0002 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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