fix: vite plugin loads default openapi-ts config file when no explicit config is provided

[Copilot]

When heyApiPlugin() is used in vite.config.js without a config option, no client generation occurs even if an openapi-ts.config.ts file exists in the project root.

Root cause

createClient(undefined) resolves to userConfigs = [] in generate.ts. Since resolveJobs in init.ts only calls loadConfigFile per entry in userConfigs, an empty array means the default config file is never discovered.

Fix

In resolveJobs (packages/openapi-ts/src/config/init.ts):

• When userConfigs is empty (implicit call with no config), fall back to a single empty config {} to trigger the default openapi-ts.config.ts lookup via c12
• Only push loaded configs when foundConfig === true or the user explicitly provided configs — prevents spurious "missing input/output" validation errors on implicit no-op calls while preserving existing CLI validation behavior

// vite.config.js — this now correctly picks up openapi-ts.config.ts
export default defineConfig({
  plugins: [vue(), heyApiPlugin()],
});

Behavior matrix

Scenario	Before	After
Vite plugin, no config, openapi-ts.config.ts present	silent no-op	config file loaded ✓
Vite plugin, no config, no config file	silent no-op	silent no-op ✓
CLI, no args, no config file	validation error	validation error ✓
CLI, with args	works	works ✓

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• fonts.googleapis.com
  • Triggering command: /opt/hostedtoolcache/node/24.14.1/x64/bin/node /opt/hostedtoolcache/node/24.14.1/x64/bin/node /home/REDACTED/work/openapi-ts/openapi-ts/node_modules/.pnpm/next@15.2.4_react-dom@19.0.0_react@19.0.0__react@19.0.0_sass@1.97.3/node_modules/next/dist/compiled/jest-worker/processChild.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[bolt-new-by-stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[changeset-bot]

⚠️ No Changeset found

Latest commit: ec9348c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
hey-api-docs	Ready	Preview, Comment	Apr 19, 2026 11:21pm

[pullfrog]

TL;DR — This is an empty WIP draft PR opened to fix #3792, where the Vite plugin ignores the default openapi-ts.config.ts config file when no inline config is passed to heyApiPlugin(). No code changes have been pushed yet.

Key changes

• (No changes yet — PR branch is identical to main)

_{Summary ｜ 0 files ｜ 0 commits ｜ base: main ← copilot/fix-vite-plugin-openapi-ts-config}

  ^{｜ View workflow run ｜ via Pullfrog ｜ 𝕏}

[pullfrog]

This is an empty WIP draft PR — it contains a single "Initial plan" commit with zero file changes. There's nothing to review yet. Will re-review once implementation commits are pushed.

Task list (3/3 completed)

• Checkout PR and read diff
• Investigate PR changes and Vite plugin code
• Submit review

  ^{｜ Fix it ➔ ｜ View workflow run ｜ 𝕏}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 39.80%. Comparing base (3cc893d) to head (ec9348c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3793   +/-   ##
=======================================
  Coverage   39.80%   39.80%           
=======================================
  Files         530      530           
  Lines       19467    19470    +3     
  Branches     5791     5793    +2     
=======================================
+ Hits         7748     7751    +3     
  Misses       9487     9487           
  Partials     2232     2232           

Flag	Coverage Δ
unittests	39.80% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.