# segment

Splits a Vovk.ts backend into segments with their own API prefixes, runtime settings and static endpoints. Useful once one route file stops being enough.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · ★ 57
- Author: finom
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/finom/vovk/tree/HEAD/skills/segment/SKILL.md
- Updated: 2026-10-22
- HTML: https://affpapa.org/en/nevibecode/skills/segment

## What it does

In Vovk.ts a segment is one slice of the backend: an API path prefix such as `/api` or `/api/admin`, the controllers that belong to it, and its own Next.js route handler file. Every segment compiles into a separate serverless function, so `runtime` and `maxDuration` can differ from one slice to the next. The skill picks the right shape for the job — root, named or static — and creates it.

The handler lives in an optional catch-all folder, for example `src/app/api/foo/[[...vovk]]/route.ts`. It exports HTTP methods built by `initSegment()`, which takes a map of controllers plus the segment name. That name has to mirror the folder path, so `foo/bar` becomes `segmentName: 'foo/bar'`. The CLI argument is a URL path piece, not a JS identifier: `admin`, `user-portal`, `admin/settings`. Ask for `MyAdmin` and the skill rewrites it to `my-admin`.

Routing goes to the deepest matching path, so `/api/foo/bar/baz` lands in the `foo/bar` segment rather than the root one. Add a named segment and any existing root-handled paths under that prefix stop reaching root — check that before you deploy. Static segments are pre-rendered to JSON at build time and pair with `output: 'export'`, which requires `cacheComponents` to be off. Use `npx vovk new segment` instead of writing `route.ts` by hand.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add finom/vovk --skill segment -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/segment/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/segment/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add finom/vovk --skill segment -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/segment/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add finom/vovk --skill segment -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/segment/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install finom/vovk segment
```

2. **Manually: put the files in place**
- File: `.github/skills/segment/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add finom/vovk --skill segment -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/finom/vovk --path skills/segment
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/segment/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add finom/vovk --skill segment -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/finom/vovk/tree/HEAD/skills/segment/SKILL.md

## When to use it
- pull the admin API into its own `/api/admin` segment
- give slow endpoints a longer `maxDuration`
- pre-render an OpenAPI spec as a JSON endpoint
- set up the first root segment in a new Vovk project
- map nested paths like `foo/bar` onto separate segments

## Example prompts
- Split my backend and move the admin handlers into a separate `/api/admin` segment
- Add a static OpenAPI endpoint that gets pre-rendered at build time
- Create a named segment `user-portal` with `maxDuration` 60

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 07528460b43d1f78.

BEGIN THIRD-PARTY FILE 07528460b43d1f78
````text
---
name: segment
description: "Vovk.ts segments in depth (`base` already covers the one root segment and its `route.ts`) — the unit of backend slicing in a Vovk project. Use whenever the user talks about splitting a backend into parts, API paths, catch-all routes, `route.ts`, `initSegment`, per-segment runtime/maxDuration, static APIs (OpenAPI specs, historical datasets), static export (`output: 'export'`), `generateStaticParams`, or the `vovk new segment` CLI. Triggers on phrasings like \"split my backend\", \"add an API slice\", \"make a static OpenAPI endpoint\", \"separate admin API\", \"pre-render API at build time\", \"I need a `/api/foo` namespace\", \"add a root/named/static segment\". Does NOT cover procedures/handlers themselves — hand off to the `procedure` skill for anything inside a controller. Does NOT cover OpenAPI authoring beyond wiring per-segment `openAPIObject` — hand off to the `openapi` skill. Does NOT cover multi-tenant routing mechanics (subdomains, `multitenant()` proxy, per-tenant frontend pages) — hand off to the `multitenant` skill."
---

# Vovk.ts segments

A segment is a **backend slice**. Owns API path prefix (`/api`, `/api/admin`, `/api/openapi`, etc.), set of controllers, own Next.js route-handler file. Each segment compiles to independent serverless function, so runtime settings (`runtime`, `maxDuration`, etc.) can differ per segment.

Think: "one segment = one mini-backend."

## Core concepts

### The catch-all file

Every segment is Next.js App Router **optional catch-all** route handler:

```
src/app/api/[[...vovk]]/route.ts              ← root segment (path: /api/*)
src/app/api/foo/[[...vovk]]/route.ts          ← "foo" segment (path: /api/foo/*)
src/app/api/foo/bar/[[...vovk]]/route.ts      ← "foo/bar" segment (path: /api/foo/bar/*)
```

Slug name (`vovk`) can be any name: the CLI takes any `[[...name]]` folder that has a `route.ts`. Stick with `vovk` (what `vovk new segment` writes) unless user has reason to change it. `rootEntry` is something else: the API root folder (`api`).

### `initSegment()`

Every segment's `route.ts` exports HTTP handlers produced by `initSegment()`:

```ts
// src/app/api/[[...vovk]]/route.ts
import { initSegment } from 'vovk';
import UserController from '../../../modules/user/user-controller';
import PostController from '../../../modules/post/post-controller';

export const maxDuration = 300; // Next.js route-handler option

const controllers = {
  UserRPC: UserController,
  PostRPC: PostController,
};

export type Controllers = typeof controllers;

export const { GET, POST, PATCH, PUT, HEAD, OPTIONS, DELETE } = initSegment({
  controllers,
});
```
````
END THIRD-PARTY FILE 07528460b43d1f78

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