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Mixins

Category: Engineering  ·  Sub-category: backend  ·  Last updated:
Vovk.ts OpenAPI mixins — importing third-party OpenAPI 3.x schemas as typed client modules that share the same call signature as native Vovk RPC modules. Use whenever the user asks to "call a third-party API from my Vovk app", "mixin an OpenAPI schema", "import an OpenAPI spec as a client", "wrap an external service that only ships an OpenAPI doc", or mentions `openAPIMixin`, `getModuleName`, `getMethodName`, `withDefaults` on a generated API module, or the `Mixins` namespace. Also use to push back when the user reaches for mixins for a vendor with a great official SDK (Stripe, AWS, GitHub via Octokit) — the skill explains when the official client is the better choice. Covers remote/local/inline specs, module + method naming strategies, `apiRoot`, per-mixin fetcher, AJV client validation knobs, and composed/segmented clients. **`deriveTools` works with mixins for OpenAI / Anthropic / Vercel function-calling** (reads `parameters` JSON Schema), but the `mcp-handler` path needs `inputSchemas` Standard Schemas which mixins don't carry — wrap in `createTool({...})` for MCP (see `tools` skill).

From the source SKILL.md

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.

What this skill does

Mixins is a community-contributed Claude Code skill in the backend sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/mixins/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use whenever the user asks to "call a third-party API from my Vovk app", "mixin an OpenAPI schema", "import an OpenAPI spec as a client", "wrap an external service that only ships an OpenAPI doc", or mentions `openAPIMixin`, `getModuleName`, `getMethodName`, `withDefaults` on a generated API module, or the `Mixins` namespace. Also use to push back when the user reaches for mixins for a vendor with a great official SDK (Stripe, AWS, GitHub via Octokit) — the skill explains when the official client is the better choice.

Who uses this skill

The Mixins Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 121,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/mixins
curl -L https://claudskills.com/skills/mixins/SKILL.md \
  -o ~/.claude/skills/mixins/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/mixins/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/mixins/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\mixins\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Mixins Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/mixins/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Mixins skill do?
Vovk.ts OpenAPI mixins — importing third-party OpenAPI 3.x schemas as typed client modules that share the same call signature as native Vovk RPC modules. Use whenever the user asks to "call a third-party API from my Vovk app", "mixin an OpenAPI schema", "import an OpenAPI spec as a client", "wrap an external service that only ships an OpenAPI doc", or mentions `openAPIMixin`, `getModuleName`, `getMethodName`, `withDefaults` on a generated API module, or the `Mixins` namespace. Also use to push back when the user reaches for mixins for a vendor with a great official SDK (Stripe, AWS, GitHub via Octokit) — the skill explains when the official client is the better choice. Covers remote/local/inline specs, module + method naming strategies, `apiRoot`, per-mixin fetcher, AJV client validation knobs, and composed/segmented clients. **`deriveTools` works with mixins for OpenAI / Anthropic / Vercel function-calling** (reads `parameters` JSON Schema), but the `mcp-handler` path needs `inputSchemas` Standard Schemas which mixins don't carry — wrap in `createTool({...})` for MCP (see `tools` skill).
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Mixins skill?
Use Mixins when your Claude Code task falls under the Engineering category — specifically in the backend area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Mixins" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the Mixins skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Mixins is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
finom. (2026). Mixins [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/mixins/
BibTeX
@misc{mixins-2026,
  author    = {finom},
  title     = {Mixins [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/mixins/}
}

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