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 gear-foundation/vara-skills --skill sails-ethexe-implementergit clone --depth 1 https://github.com/gear-foundation/vara-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/gear-foundation/vara-skills/sails-ethexe-implementer)<a href="https://agentmods.dev/skills/gear-foundation/vara-skills/sails-ethexe-implementer"><img src="https://agentmods.dev/badge/skills/gear-foundation/vara-skills/sails-ethexe-implementer/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/gear-foundation/vara-skills/sails-ethexe-implementer"><img src="https://agentmods.dev/badge/skills/gear-foundation/vara-skills/sails-ethexe-implementer.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00060 | $0.01080 |
| Opus 5 | $0.00030 | $0.00540 |
| Sonnet 5 | $0.00012 | $0.00216 |
| Haiku 4.5 | $0.00006 | $0.00108 |
Grade A, and why
sails-ethexe-implementer 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sails Ethexe Implementer
Overview
Implement approved tasks in Sails ethexe workspaces where the ethexe feature is enabled and methods may be exported via ethabi transport, accept value (payable), or emit Ethereum-style events.
If the task does NOT need the ethexe feature, use ../sails-rust-implementer/SKILL.md instead.
Inputs
../../references/sails-ethexe-patterns.md— ethexe diff table, type requirements, transport rules, event patterns../../references/sails-syscall-mapping.md—Syscall::*API (note gated syscalls)../../references/sails-cheatsheet.md— core Sails patterns../../references/sails-rs-imports.md— import paths../../references/sails-idl-v2-syntax.md— IDL v2 annotations../../references/sails-header-wire-format.md— Sails Header routing
Consume the approved spec, architecture, and tasks artifacts before changing code.
Workflow
- Confirm the task is specified and architecture-approved.
- Confirm the crate has
sails-rswithfeatures = ["ethexe"]inCargo.toml. - Identify the smallest code change that satisfies the task.
- Use
#[sails_type]for all custom types. Types used in ethabi-exported methods must also be ABI-encodable as Solidity tuples (SolValue). - Choose the correct transport per method:
#[export]— both scale + ethabi (default with ethexe)#[export(scale)]— scale only, no ethabi#[export(ethabi)]— ethabi only#[export(ethabi, payable)]— ethabi with value acceptance
- Use
emit_eth_event()for Ethereum-style events,emit_event()for standard Gear events. Do not mix them on the same event type without explicit architecture guidance. - Mark
#[indexed]on up to 3 event fields per variant for Ethereum topic indexing. - Use
Syscall::*for runtime accessors. Three syscalls are unavailable:signal_from,signal_code,system_reserve_gas. - Hand verification to the gtest loop before claiming done.
Transport Decision Guide
| Scenario | Attribute |
|---|---|
| Standard method, both transports | #[export] |
| Method only callable from Gear programs (no EVM) | #[export(scale)] |
| Method only callable from EVM | #[export(ethabi)] |
| Method that accepts value from EVM | #[export(ethabi, payable)] or #[export(scale, ethabi, payable)] |
| Query (read-only) | #[export] (transport flags orthogonal to query semantics) |
What ships with it
3 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.
- 12d ago First seen · 99 lines · 60 tokens per session scan A 93969a0740e1
sails-ethexe-implementer is a skill published in the GitHub repository gear-foundation/vara-skills (17 stars, last pushed 2mo ago), licensed MIT. It adds 60 tokens to every session and 1,080 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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