[nuxt] Manifest shows 0 workflows despite bundle containing valid workflows

[jeverduzco]

Description

When using workflow/nuxt module, the manifest is generated with 0 workflows even though the workflows.mjs bundle contains valid workflows with correct workflowId assignments.

Environment

• Nuxt version: 4.2.2
• workflow version: 4.0.1-beta.48

Steps to Reproduce

1. Create Nuxt project with workflow/nuxt module
2. Create workflow in server/workflows/test-simple.ts:

export async function testSimpleWorkflow() {
  'use workflow';
  return { ok: true };
}

Run npm run dev

Expected

Manifest shows 1 workflow

Actual

Created manifest with 7 step(s) and 0 workflow(s)

Evidence

The generated node_modules/.nitro/workflow/workflows.mjs contains:

testSimpleWorkflow. workflowId = "workflow//server/workflows/test-simple.ts//testSimpleWorkflow";
globalThis.__private_workflows. set(".. .", testSimpleWorkflow);

The workflows ARE in the bundle but extractWorkflowGraphs appears to fail silently.