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 finom/vovk --skill mixinsgit clone --depth 1 https://github.com/finom/vovkWrote 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/finom/vovk/mixins)<a href="https://agentmods.dev/skills/finom/vovk/mixins"><img src="https://agentmods.dev/badge/skills/finom/vovk/mixins/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/finom/vovk/mixins"><img src="https://agentmods.dev/badge/skills/finom/vovk/mixins.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 74 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 285 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 317 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00256 | $0.03876 |
| Opus 5.5 | $0.00102 | $0.01550 |
| Sonnet 5.5 | $0.00051 | $0.00775 |
| Haiku 4.5 | $0.00026 | $0.00388 |
Grade A, and why
mixins 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.
How it starts
The opening of the file, as written. The whole thing — 293 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Vovk.ts OpenAPI mixins
Mixins turn any OpenAPI 3.x spec into typed client module behaving exactly like native Vovk RPC module — same { params, query, body } call shape, same client surface, same type-inference helpers (VovkBody, VovkOutput, …). Can run mixins standalone (no Next.js) as pure codegen tool.
LLM tool exposure works out of the box. Pass mixin modules straight to deriveTools — for function calling and for MCP. Each derived tool gets a merged inputSchema that is both a Standard Schema and a Standard JSON Schema, rebuilt from the mixin's OpenAPI-derived JSON Schema.
The one real difference from a procedure-backed controller: that schema's validate checks the { body, query, params } envelope only — required slots present, no unknown keys — and defers slot values to execution time, where the generated client's AJV validation and the remote API enforce them. Controllers validate values up front because they carry your original Zod / Valibot / ArkType schemas.
v3 required hand-written
createToolwrappers for the MCP path. That is obsolete:createToolwas removed in v4 and mixins now carry the schema MCP needs.
Prefer the official SDK when one exists
Recommend official client library first. Hand-maintained SDKs like stripe, @octokit/rest, @aws-sdk/*, @google-cloud/* ship with auth flows, retries, pagination helpers, webhook signature verification, edge-case handling that generated client can't match — and track upstream API changes faster than any spec snapshot. If vendor publishes official SDK, use it.
Mixins right tool when:
- No official SDK exists — internal services, niche vendors, legacy APIs that only publish OpenAPI document.
- LLM tool exposure —
deriveToolsworks directly for function calling and MCP alike (see note at top). For GitHub-style APIs@octokit/reststill better tool body, but mixin remains useful when third-party API has no official SDK. - Spec-as-source-of-truth — internal microservices where OpenAPI doc is generated and you want client drift to surface as TypeScript error at build time.
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 Changed 8bf4d6468ecd
- 11d ago Changed · -20 lines 560171304ac0
- 16d ago Changed 0b4448424b1a
- 17d ago Changed · -8 lines afdc75420403
- 18d ago Changed 7e30f3b7dd9c
- 23d ago Changed · +3 lines · -19 tokens per session b26b6963b528
- 1mo ago First seen · 318 lines · 275 tokens per session scan A f56a1c620bf4
mixins is a skill published in the GitHub repository finom/vovk (54 stars, last pushed 2d ago), licensed MIT. It adds 256 tokens to every session and 3,876 once invoked, about $0.0010 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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adapter-express
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Use this skill when a PinMe project (Worker TypeScript) needs to integrate email sending (sendemail). Guides AI to generate correct Worker TS code.
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Use this skill when writing, reviewing, or refactoring Node.js code — modules, async flow, cancellation, file and process I/O, HTTP — on a current Node.js release. Triggers: user mentions "Node", "Node.js", "ESM", "CommonJS", "require", "import", "fetch", "AbortSignal", "AbortController", "stream", "childprocess"…
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Use when building or structuring a NestJS backend — feature modules, providers and DI wiring, provider scopes and request-lifecycle order, where to bind guards/pipes/interceptors/filters, and testing with Test.createTestingModule. NOT a bare Express/Fastify service with no DI (that is nodejs), NOT framework-agnostic…