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rpcgen

rpcgen is a skill for Claude Code from vmkteam/claude-plugins. It costs 54 tokens per session (1,085 once invoked), scanned A, original, MIT.

A code generator that creates typed client libraries from an SMD or OpenRPC description of an RPC service. RPC is a way for one program to call functions provided by another program.

In plain words
What is it for?
Use it to generate Go, TypeScript, PHP, Swift, Kotlin, or Dart clients from a URL or JSON file, or to publish generated clients from a server endpoint.
Why use it?
It avoids hand-writing client code and keeps clients based on the service’s published interface description.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is rpcgen -lang go -url http://localhost:$(PORT)/rpc/ -o ./pkg/client/$(NAME)/.

Part of the vmkteam-developer plugin — 35 skills shipped together

not rated 7repo changed 6d ago A scan 54 tokens original MIT

Good fit Use it to generate Go, TypeScript, PHP, Swift, Kotlin, or Dart clients from a URL or JSON file, or to publish generated clients from a server endpoint.

Compare 6 skills from other repositories ↓
View source ↗ vmkteam/claude-plugins
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/vmkteam/claude-plugins
agentmods
npx agentmods add skills/vmkteam/claude-plugins/rpcgen

Made for: Claude Code.

Or install vmkteam-developer, the plugin that ships this one along with the rest of its 35 skills.

Wrote 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.

agentmods badge for rpcgen

README.md
[![agentmods](https://agentmods.dev/badge/skills/vmkteam/claude-plugins/rpcgen/github.svg)](https://agentmods.dev/skills/vmkteam/claude-plugins/rpcgen)
Your own site
<a href="https://agentmods.dev/skills/vmkteam/claude-plugins/rpcgen"><img src="https://agentmods.dev/badge/skills/vmkteam/claude-plugins/rpcgen/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.

agentmods 80×15 button for rpcgen

Your own site · 80×15
<a href="https://agentmods.dev/skills/vmkteam/claude-plugins/rpcgen"><img src="https://agentmods.dev/badge/skills/vmkteam/claude-plugins/rpcgen.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,085 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00054 $0.01085
Opus 5.5 $0.00022 $0.00434
Sonnet 5.5 $0.00011 $0.00217
Haiku 4.5 $0.00005 $0.00109

Measured 6d ago against content hash a01803d75886, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rpcgen 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 6d 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.

plugins/developer/skills/rpcgen/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rpcgen

Upstream: https://github.com/vmkteam/rpcgen

Генерирует типизированные клиенты из SMD (Service Mapping Description) zenrpc-сервера. Связанный инструмент — rpcdiff (diff OpenRPC schema для breaking-changes в CI).

Tool-зависимость:

tool github.com/vmkteam/rpcgen/v2/cmd/rpcgen

Языки и API

gen.GoClient, gen.TSClient, gen.PHPClient, gen.SwiftClient, gen.KotlinClient, gen.DartClient, gen.OpenRPC(name, url).

CLI — через -lang <go|typescript|php|swift|kotlin|dart>, источник -url (SMD endpoint) или -file smd.json, вывод -o. Полный список флагов — rpcgen --help.

vmkteam-паттерн: on-the-fly handler

Сервер раздаёт клиенты с собственных endpoint'ов через rpcgen.Handler:

a.echo.Any("/v1/rpc/api.ts",   appkit.EchoHandlerFunc(rpcgen.Handler(gen.TSClient(typeMapper))))
a.echo.Any("/v1/rpc/api.go",   appkit.EchoHandlerFunc(rpcgen.Handler(gen.GoClient(golang.Settings{Package: appName}))))
a.echo.Any("/v1/rpc/api.swift",     appkit.EchoHandlerFunc(rpcgen.Handler(gen.SwiftClient(swift.Settings{Class: "API", TypeMapper: swiftTypeMapper}))))
a.echo.Any("/v1/rpc/networking.swift", appkit.EchoHandlerFunc(rpcgen.Handler(gen.SwiftClient(swift.Settings{IsProtocol: true, TypeMapper: swiftTypeMapper}))))
a.echo.Any("/v1/rpc/api.kt",        appkit.EchoHandlerFunc(rpcgen.Handler(gen.KotlinClient(kotlin.Settings{Class: "Api", PackageAPI: "com.example.api", TypeMapper: kotlinTypeMapper}))))
a.echo.Any("/v1/rpc/networking.kt", appkit.EchoHandlerFunc(rpcgen.Handler(gen.KotlinClient(kotlin.Settings{Class: "Api", PackageAPI: "com.example.api", IsProtocol: true}))))
a.echo.Any("/v1/rpc/openrpc.json",  appkit.EchoHandlerFunc(rpcgen.Handler(gen.OpenRPC("service", rpcUrl))))
  • IsProtocol: true для Swift/Kotlin → protocol/interface вместо class/data class
  • TypeMapper func(schema, current) string — переопределение типов per-язык

Makefile-цели (vmkteam-конвенция)

go-client:
	rpcgen -lang go -url http://localhost:$(PORT)/rpc/ -o ./pkg/client/$(NAME)/

type-script-client: generate
	rpcgen -lang typescript -url http://localhost:$(PORT)/rpc/ -o ../frontend/src/api/factory.generated.ts
	rpcgen -lang typescript -url http://localhost:$(PORT)/vt/ -o ../frontend/src/api/vt.generated.ts

Read the full file on GitHub · 67 lines

Changes

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.

  1. 6d ago Changed · +7 lines a01803d75886
  2. 1mo ago First seen · 60 lines · 54 tokens per session scan A 2e3f8008d8ba

Subscribe to this mod's changes

rpcgen is a skill published in the GitHub repository vmkteam/claude-plugins (7 stars, last pushed 6d ago), licensed MIT. It adds 54 tokens to every session and 1,085 once invoked, about $0.0002 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 2026-08-31.

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