Vovk.ts vovk bundle

vovk bundle packages composed TypeScript client as zero-dep npm package — pre-built JS + .d.ts, auto-gen package.json, auto-gen README.md w/ samples, ready for npm publish. Release step: vovk generate → in-project client for dev; vovk bundle → distributable SDK installed from registry.

TypeScript-only. Despite name, ships no Python/Rust clients. Those have own templates (py / pySrc / rs / rsSrc) and own publish flows — see python and rust skills.

Scope

Covers:

• 4-step bundle workflow.
• bundle.build async function (required) + canonical tsdown@0.19.0 recipe.
• bundle.outputConfig fields (origin, package, reExports, imports, requires, readme, samples, includeSegments/excludeSegments).
• Default directory layout (tmp_prebundle → dist).
• Full CLI flag list including --openapi-* mixin family.
• What's bundled / omitted (no openapi, no schema entry point — but schema still importable as named export).
• npm publish dist flow + consumer-side usage.
• deriveTools integration (bundled modules feed it identically).

Out of scope:

• In-project vovk-client generation → rpc skill.
• Python client publishing (PyPI) → python skill.
• Rust client publishing (crates.io) → rust skill.
• Mixin authoring (consumed here as bundle inputs) → mixins skill.

bundle vs generate

Command	Purpose	Output	When
vovk generate	In-project TypeScript client + OpenAPI spec	node_modules/.vovk-client/, .vovk-schema/	Every build (prebuild hook), on schema changes during vovk dev.
vovk bundle	Publishable npm package — pre-built JS + .d.ts + package.json + README.md	dist/ ready for npm publish	Ship SDK outside Next.js app.

Don't run vovk bundle in normal dev; in-project client faster. Bundle when you need registry artifact.

How bundling works

1. Vovk gens TypeScript client into prebundleOutDir (default tmp_prebundle) via tsBase template — uncompiled .ts source.
2. Vovk calls your bundle.build({ entry, outDir, prebundleDir }) async fn. Plugs in any bundler (tsdown only tested one) to compile entry (the tmp_prebundle/index.ts) → JS + .d.ts under outDir (default dist).
3. Vovk emits package.json and README.md from packageJson and readme templates into outDir.
4. Vovk deletes prebundleOutDir unless keepPrebundleDir: true (handy for debugging prebundled source).

npx vovk bundle
npm publish dist

Published package consumed exactly like vovk-client:

import { UserRPC } from 'my-api-bundle';

await UserRPC.getUser({ params: { id: '123' } });

All TS-client features (call shape, withDefaults, type inference, schema access) survive bundle.

bundle.build — required entry point

bundle.build is async fn. Vovk calls w/ absolute paths:

build: async ({ entry, outDir, prebundleDir }) => {
  // entry        — absolute path to the prebundled tmp_prebundle/index.ts
  // outDir       — absolute path where the bundler should emit JS + .d.ts
  // prebundleDir — absolute path of the prebundle dir (rarely needed)
}

Vovk is bundler-agnostic — esbuild, tsup, tsdown, even child_process shell-out work. Only tsdown tested by Vovk's authors; docs warn: pin tsdown@0.19.0 until newer versions confirmed compatible.

Canonical tsdown recipe (pin 0.19.0)

npm install --save-dev tsdown@0.19.0

/** @type {import('vovk').VovkConfig} */
const config = {
  bundle: {
    build: async ({ entry, outDir }) => {
      const { build } = await import('tsdown');
      await build({
        entry,
        dts: true,
        format: 'esm',
        hash: false,
        fixedExtension: true,
        clean: true,
        outDir,
        platform: 'neutral',
        outExtensions: () => ({ js: '.js', dts: '.d.ts' }),
        outputOptions: { inlineDynamicImports: true },
        inputOptions: { resolve: { mainFields: ['module', 'main'] } },
        noExternal: ['!next/**'],
      });
    },
    outputConfig: {
      origin: 'https://example.com',
      package: {
        main: './index.js',
        types: './index.d.ts',
        exports: { '.': { default: './index.js', types: './index.d.ts' } },
      },
      imports: { validateOnClient: null }, // shrinks the bundle considerably
    },
  },
};
export default config;

Resulting dist/ layout:

dist/
├── package.json
├── README.md
├── index.js
└── index.d.ts

bundle.outputConfig — what goes in package

bundle.outputConfig accepts same options as root-level outputConfig (bundle-specific overrides win). Key fields:

Field	Purpose
origin (required)	Default API base URL baked into bundled client. Override at call time via apiRoot.
package	Overrides for generated package.json. Set name, version, type, main, types, exports here. Defaults pull from project root package.json where present.
imports.validateOnClient: null	Disables client-side AJV validation in bundle — usually big size win.
imports.fetcher	Custom fetcher path baked into bundle.
reExports	Extra named exports in generated index.ts. E.g. { doSomething: './src/utils' } exposes helper alongside RPC modules.
readme.banner	String prepended to generated README.md (badges, logo HTML, status callouts).
readme.installCommand	Override install command in README (default: npm install <package-name>). For monorepo / private-registry / pnpm / yarn-first audiences.
readme.description	Replaces description block in README. Defaults to bundled package.json description.
samples.apiRoot	Base URL in generated README samples. Defaults to outputConfig.origin. Set to public-facing URL when origin points to staging/internal hostname.
samples.headers	Header map (e.g. { Authorization: 'Bearer YOUR_TOKEN' }) in generated samples — shows consumers how to auth.

Min viable outputConfig is origin + package block with main/types/exports matching bundler's output filenames.

Root bundle keys (NOT under outputConfig)

These three live on root VovkBundleConfig (config.bundle.*), not nested under outputConfig:

Field	Purpose
requires	Template dir overrides — readme, packageJson, or any custom template. Defaults to project root for both. Source: packages/vovk/src/types/config.ts:46.
includeSegments / excludeSegments	Filter which Vovk segments contribute to bundle. Source: packages/vovk/src/types/config.ts:52; CLI reads them at packages/vovk-cli/src/bundle/index.mts:55-56 from root bundleConfig.

The published docs example nests these under outputConfig — that's the doc's mistake. Source places them at root config.bundle.*. Source wins.

CLI flags

$ npx vovk bundle --help
Usage: vovk bundle|b [options]

  --out, --out-dir <path>                          path to output directory for bundle
  --prebundle-out-dir, --prebundle-out <path>      path to output directory for prebundle
  --keep-prebundle-dir                             do not delete prebundle directory after bundling
  --include, --include-segments <segments...>      include segments
  --exclude, --exclude-segments <segments...>      exclude segments
  --schema, --schema-path <path>                   path to schema folder (default: .vovk-schema)
  --config, --config-path <config>                 path to config file
  --origin <url>                                   set the origin URL for the generated client
  --openapi, --openapi-spec <paths_or_urls...>     use OpenAPI mixins for client generation
  --openapi-module-name <names...>                 module name strategies, indexed against --openapi
  --openapi-method-name <names...>                 method name strategies, indexed against --openapi
  --openapi-root-url <urls...>                     root URLs, indexed against --openapi
  --openapi-mixin-name <names...>                  mixin names, indexed against --openapi
  --openapi-fallback <paths...>                    fallback files for --openapi URLs
  --log-level <level>                              set the log level

--openapi-* family is positional — one entry per spec to --openapi, matching entry at same index to each subsidiary flag. Lets you bundle client combining your own segments with OpenAPI mixins w/o touching config file (handy for one-off CI bundles).

What's bundled, what's omitted

Included: all RPC modules (with @operation-driven types), schema named export, type inference helpers, withDefaults method on each module.

Omitted:

• openapi object (would inflate bundle size). Consumers needing OpenAPI spec should hit runtime endpoint serving it (see openapi skill).
• Separate schema module entry point — bundle is single-entry by design. schema named export still importable from package root, <RpcModule>.<method>.schema still on every method:

import { schema, UserRPC } from 'my-api-bundle';

console.log(schema.segments[''].controllers.UserRPC.handlers.getUser.validation.params);
console.log(UserRPC.getUser.schema.validation.params);

Bundled SDK + deriveTools

Bundled modules feed deriveTools identically to native ones — same call sig, same @operation metadata, same tool surface:

import { UserRPC } from 'my-api-bundle';
import { deriveTools } from 'vovk';

const { tools } = deriveTools({ modules: { UserRPC } });

See tools skill for full pipeline.

Flows

"Publish a TypeScript SDK for my Vovk API"

1. Add bundle to vovk.config.mjs w/ build fn (use tsdown recipe above) and outputConfig containing origin + package block.
2. npx vovk bundle.
3. npm publish dist.

"Bundle a subset of segments as a public SDK"

Set bundle.outputConfig.includeSegments (or pass --include on CLI) to ship only public-facing segments. Useful when admin/internal segments live in same Vovk app but only public ships to consumers.

"Bundle our API combined with a third-party OpenAPI spec"

Either configure mixins in vovk.config.mjs (see mixins skill) and run npx vovk bundle, or use CLI's --openapi* flags for one-off:

npx vovk bundle \
  --openapi https://petstore3.swagger.io/api/v3/openapi.json \
  --openapi-module-name PetstoreAPI \
  --openapi-method-name auto \
  --openapi-root-url https://petstore3.swagger.io/api/v3

"My bundle is too large"

Disable client-side validation: bundle.outputConfig.imports.validateOnClient: null. Most apps consuming typed SDK trust their own input; AJV adds runtime weight often unneeded post-publish.

"Debug the prebundled TypeScript before bundling"

Set bundle.keepPrebundleDir: true (or pass --keep-prebundle-dir). tmp_prebundle survives bundle run so you can inspect generated index.ts and module sources.

Gotchas

• bundle is TypeScript-only. Don't reach for Python/Rust SDKs — those use vovk generate with py/pySrc/rs/rsSrc templates + language-native publish commands. See python / rust skills.
• Pin tsdown@0.19.0. Docs warn tsdown's API may break between minor versions; recipe above validated against 0.19.0. No floating range until upstream stability confirmed.
• origin required. Without it, bundled client has no default API base URL and consumers must pass apiRoot on every call. Bake it in — or use withDefaults post-import as one-off.
• NextResponse type inference needs next package at consumer install time (Next.js limitation, not Vovk's). For dynamic response headers in bundled controller, return plain Response w/ manual type casting.
• openapi module isn't bundled — consumers needing spec should fetch from runtime endpoint (see openapi skill's OpenApiController pattern). Deliberate size choice.
• No segmented bundle yet — bundled package is single-entry. Segmented bundling (one package per segment) is roadmap item; for now, run vovk bundle once per segment-subset via includeSegments if you need separate packages.
• Don't bake secrets. API tokens and signing keys must not ship in published package. Document consumers configure auth themselves (via withDefaults or custom fetcher).
• CI placement. Bundle in release workflow triggered by tag or manual dispatch, not every PR. Build step heavier than vovk generate and produces artifact you don't want piling up in main-branch CI.
• package.json defaults inherit from project root. Set bundle.outputConfig.package.name (and version) explicitly when project root's name isn't a good public package name — almost always the case for Next.js apps named after product, not SDK.