KUBB_POST_GENERATE_FAILED: Post-generate command failed

Code: KUBB_POST_GENERATE_FAILED Level: error

A post-generate command (output.postGenerate) exited with a non-zero status. These commands run after generation. The files are written, but the run is marked failed.

What happened

output.postGenerate runs shell commands once the generated files are formatted and linted, for example a formatter or a tsc check. A command that exits non-zero shows up here, in the summary, and in --reporter json. Earlier versions only logged a line and moved on.

Common causes

• The command is not installed or not on PATH.
• The command has a typo.
• The command did real work and genuinely failed, such as a type error caught by tsc.

How to fix it

• Run the command manually from the project root to see its output.
• Confirm the binary is installed and the command is spelled correctly.

kubb.config.ts

import { defineConfig } from 'kubb/config'

export default defineConfig({
  input: { path: './petStore.yaml' },
  output: {
    path: './src/gen',
    postGenerate: ['biome check --write ./src/gen'],
  },
})

Example output

Terminal

[KUBB_POST_GENERATE_FAILED]: Post-generate command failed: Command failed with exit code 1
  fix: Check that the tool is installed and that the command and its config are correct.
  see: https://kubb.dev/docs/5.x/reference/diagnostics/kubb-post-generate-failed

See also

• Configuration
• Diagnostics reference