# Build tools: Validate app manifest without VSCode

**URL:** <https://community.amazondeveloper.com/t/build-tools-validate-app-manifest-without-vscode/25121>\
**Category:** Feature Requests\
**Created:** [December 18, 2025, 4:20pm UTC](https://community.amazondeveloper.com/t/build-tools-validate-app-manifest-without-vscode/25121 "2025-12-18T16:20:41Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mikey](https://dhm3gbtzu79o6.cloudfront.net/user_avatar/community.amazondeveloper.com/mikey/32/928_2.png) [@mikey](https://community.amazondeveloper.com/u/mikey)\
**Post date:** [December 18, 2025, 4:20pm UTC](https://community.amazondeveloper.com/t/build-tools-validate-app-manifest-without-vscode/25121/1 "2025-12-18T16:20:41Z")

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There should be a CLI tool that validates `manifest.toml`, without requiring VSCode—something not every team may use (nor will continuous integration platforms).

This could be a separate `kepler` command, or just an automatic part of `build`.

Such a tool would make issues like [this one](https://community.amazondeveloper.com/t/bad-icon-file-path-in-manifest-leads-to-cryptic-installation-error/25116) easier to address before appstore submission.

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**Author:** ![amen](https://avatars.discourse-cdn.com/v4/letter/a/ee7513/32.png) [@amen](https://community.amazondeveloper.com/u/amen)\
**Post date:** [December 18, 2025, 8:32pm UTC](https://community.amazondeveloper.com/t/build-tools-validate-app-manifest-without-vscode/25121/3 "2025-12-18T20:32:38Z")

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Hi @mikey,

Thank you for this feature request! It turns out there’s already a CLI tool available that should address your need.

You can use the Vega Package Tool (vpt) to validate your manifest without VSCode:

```bash
vpt validate <vpkg or manifest.toml path>

```

This works with either your manifest.toml file directly or a packaged .vpkg file. The command checks your manifest against AppStore requirements and provides detailed, actionable error messages.

For more details, see the [VPT Documentation](https://developer.amazon.com/docs/vega/0.21/vpt.html).

If you run into any issues or if this doesn’t fully meet your needs, please let us know. Your feedback about discoverability is valuable and helps us improve our documentation.

Thanks for helping us improve the Vega platform.

Warm regards,  
Aishwarya

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<div class="post-metadata">

**Author:** ![mikey](https://dhm3gbtzu79o6.cloudfront.net/user_avatar/community.amazondeveloper.com/mikey/32/928_2.png) [@mikey](https://community.amazondeveloper.com/u/mikey)\
**Post date:** [December 18, 2025, 10:52pm UTC](https://community.amazondeveloper.com/t/build-tools-validate-app-manifest-without-vscode/25121/4 "2025-12-18T22:52:07Z")

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Ah, that should work well, thank you!

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<div class="post-metadata">

**Author:** ![system](https://dhm3gbtzu79o6.cloudfront.net/user_avatar/community.amazondeveloper.com/system/32/5065_2.png) [@system](https://community.amazondeveloper.com/u/system)\
**Post date:** [January 1, 2026, 10:52pm UTC](https://community.amazondeveloper.com/t/build-tools-validate-app-manifest-without-vscode/25121/5 "2026-01-01T22:52:15Z")

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