Using the workfront-ui-ext-tpl causes error in this plugin

[fgeldenhuys]

Describe the bug
After creating a project using the https://github.com/adobe/workfront-ui-ext-tpl template, or adding a Workfront UI extension to another project, this plugin fails like this:

aio app dev -v -e workfront/ui/1
2025-07-29T12:46:25.129Z [@adobe/aio-cli-plugin-app-dev] error: TypeError: Cannot read properties of undefined (reading 'packages')
    at Dev.verifyActionConfig (/opt/homebrew/lib/node_modules/@adobe/aio-cli/node_modules/@adobe/aio-cli-plugin-app-dev/src/commands/app/dev/index.js:105:47)
    at Dev.run (/opt/homebrew/lib/node_modules/@adobe/aio-cli/node_modules/@adobe/aio-cli-plugin-app-dev/src/commands/app/dev/index.js:59:18)
    at async Dev._run (/opt/homebrew/lib/node_modules/@adobe/aio-cli/node_modules/@adobe/aio-cli-plugin-app-dev/node_modules/@oclif/core/lib/command.js:311:22)
    at async Config.runCommand (/opt/homebrew/lib/node_modules/@adobe/aio-cli/node_modules/@oclif/core/lib/config/config.js:329:25)
    at async run (/opt/homebrew/lib/node_modules/@adobe/aio-cli/node_modules/@oclif/core/lib/main.js:89:16)
    at async AIOCommand.run (/opt/homebrew/lib/node_modules/@adobe/aio-cli/src/index.js:38:12)
 ›   Error: Cannot read properties of undefined (reading 'packages')

To Reproduce
Steps to reproduce the behavior:

1. Create project using the workfront-ui-ext-tpl template
2. Run it using aio app dev

Expected behavior
The project to run in dev mode without errors.

Desktop (please complete the following information):

• OS: Mac OS 15
• Version: @adobe/aio-cli/10.3.4 darwin-arm64 node-v22.17.1

Additional context
Tried both creating from template and manually adding to existing working project.

[shazron]

aio-cli-plugin-app-dev/src/commands/app/dev/index.js

Line 105 in 32dbd50

const actionConfig = config.manifest.full.packages

[aiojbot]

JIRA issue created: https://jira.corp.adobe.com/browse/ACNA-3942

[shazron]

PR #156

[shazron]

Release https://github.com/adobe/aio-cli-plugin-app-dev/releases/tag/2.1.2