wrangler deploy persistently fails with workflows.api.error.internal_server [code: 10001] on new Free account

Summary

Hitting workflows.api.error.internal_server [code: 10001] consistently on a brand-new Free-plan Cloudflare account. Worker uploads successfully, D1 migrations apply, R2 binding resolves — only the final workflow registration step (/accounts/<id>/workflows/<name>) returns 500.

This appears identical to cloudflare/workers-sdk#9110 (closed as a transient server-side incident). For this account the failure is persistent — every attempt over the past ~24 hours fails identically, across multiple environments and after exhausting client-side workarounds.

Reproduction

# wrangler.toml (relevant section)
[[workflows]]
name = "review-workflow-v2"
binding = "REVIEW_WORKFLOW"
class_name = "ReviewWorkflow"

Failing log (GitHub Actions, ubuntu-latest, US datacenter):

 ⛅️ wrangler 4.90.1
🌀 Building list of assets...
✨ Read 59 files from the assets directory
🌀 Starting asset upload...
No updated asset files to upload. Proceeding with deployment...
Total Upload: 3390.58 KiB / gzip: 724.93 KiB
Worker Startup Time: 13 ms
Your Worker has access to the following bindings:
Binding                                              Resource
env.REVIEW_WORKFLOW (ReviewWorkflow)                 Workflow
env.DB (icon-review-db)                              D1 Database
env.BUCKET (icon-review-files)                       R2 Bucket
env.BROWSER                                          Browser Run
env.AI                                               AI
env.ASSETS                                           Assets
... (env vars)
Uploaded icon-review (5.99 sec)

✘ [ERROR] A request to the Cloudflare API (/accounts/***/workflows/review-workflow-v2) failed.

  workflows.api.error.internal_server [code: 10001]

##[error]Process completed with exit code 1.

Environment

• Account ID: f8b237dd484d7d40583f0e407a46ab7f
• Plan: Workers Free
• Account age: created 2026-05-13 (≈24 hours old at first failure)
• Wrangler version: 4.90.1 (also reproduced with 4.77.0 pinned)
• Runtime: GitHub Actions ubuntu-latest and macOS local with proxy
• First failure: 2026-05-13 ~10:00 UTC
• Most recent failure: 2026-05-14 02:58:35 UTC
• Failure rate: 100% over ~10 attempts spanning 24+ hours

What we ruled out

• ❌ Network / proxy — fails identically on GitHub Actions runner with clean US network
• ❌ API Token scope — token has Workers Scripts:Edit, D1:Edit, Workers R2 Storage:Edit, Browser Rendering:Edit, User Details:Read. (Note: there is no separate Workflows resource in the token UI — per docs Workflows operations are covered by Workers Scripts.)
• ❌ Tooling regression — pinning to wrangler 4.77.0 reproduces the same error
• ❌ Orphaned workflow record — renaming the workflow to a never-before-seen name produces the same 500
• ❌ First-deploy provisioning lag — failures span 24+ hours

Hypothesis

Per the resolution of cloudflare/workers-sdk#9110, this looks like an account-level Workflows control-plane bug. Could a Cloudflare engineer with access check this account's Workflows provisioning state for Account ID f8b237dd484d7d40583f0e407a46ab7f? Happy to run any diagnostic curl probe you'd like.

Cross-reference

• Original issue: cloudflare/workers-sdk#9110
• Related symptom (different code 10000, auth scope): https://community.cloudflare.com/t/wrangler-deploy-workflows-10000-error/827149