docs(start): troubleshoot Cloudflare deployment config

[tannerlinsley]

🎯 Changes

Explain why Cloudflare deployment can fail after a successful Vite build when wrangler deploy --config wrangler.jsonc bypasses the generated deployment config. Show the build and dry-run commands, how to preserve generated output between CI jobs, and how to select a named environment at build time.

The existing Cloudflare browser suite now includes a deployment dry run using the generated config. This addresses the configuration mistake reported in #5554 without adding an external-module workaround or changing the source server entry.

Validation: the explicit source-config dry run reproduced the missing-entry error; the generated-config dry run passed. All 4 Cloudflare preview/dry-run tests passed. A temporary staging config verified build-time environment selection and passed a dry run, then the source config and default build were restored. Required lint, type, unit, and formatting checks passed. No Worker was published, and live account permissions or deployed bindings were not tested.

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested code changes locally with the relevant test commands, or tests do not apply to this pull request.
• I fully understand the code in this pull request.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

• Documentation

  • Added troubleshooting guidance for Cloudflare Workers deployments that fail despite successful Vite builds.
  • Documented how to validate deployment packaging with dry runs, preserve generated deployment files across build and deploy steps, and configure named environments correctly.
  • Clarified the limitations of dry-run validation, including account permissions, domains, and deployed bindings.

• Tests

  • Added end-to-end coverage verifying that Cloudflare deployment dry runs use the generated deployment configuration and complete successfully.

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 6ec9f33

Command	Status	Duration	Result
nx affected --targets=test:eslint,test:unit,tes...	✅ Succeeded	2m 21s	View ↗
nx run-many --target=build --exclude=examples/*...	✅ Succeeded	2m 16s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-09-12 04:33:39 UTC

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 05422da and 6ec9f33.

📒 Files selected for processing (2)

• docs/start/framework/react/guide/hosting.md
• e2e/react-start/basic-cloudflare/tests/app.spec.ts

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---

📝 Walkthrough

Walkthrough

The PR adds Cloudflare Workers deployment troubleshooting guidance for React Start and an end-to-end test that validates Wrangler dry-run output against the generated server configuration.

Changes

Cloudflare deployment validation

Layer / File(s)	Summary
Deployment configuration troubleshooting docs/start/framework/react/guide/hosting.md	Documents generated Wrangler configuration, dry-run validation, build and deploy job requirements, environment selection, and dry-run limitations.
Cloudflare dry-run test e2e/react-start/basic-cloudflare/tests/app.spec.ts	Runs the local Wrangler CLI with --dry-run and checks for dist/server/wrangler.json and the dry-run exit message.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 6ec9f

The PR adds troubleshooting guidance and dry-run coverage without introducing a concrete deployment risk.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description explains the documentation and test changes, records validation results and limitations, and completes all required checklist and release-impact sections.
Title check	✅ Passed	The title clearly identifies the main change: troubleshooting Cloudflare deployment configuration issues in the documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch taren/start-cloudflare-deploy-troubleshooting

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[github-actions]

🚀 Changeset Version Preview

3 package(s) bumped directly, 21 bumped as dependents.

🟩 Patch bumps

Package	Version	Reason
@tanstack/history	1.162.3 → 1.162.4	Changeset
@tanstack/router-core	1.171.29 → 1.171.30	Changeset
@tanstack/start-server-core	1.169.34 → 1.169.35	Changeset
@tanstack/react-router	1.170.35 → 1.170.36	Dependent
@tanstack/react-start	1.168.52 → 1.168.53	Dependent
@tanstack/react-start-client	1.168.33 → 1.168.34	Dependent
@tanstack/react-start-rsc	0.1.51 → 0.1.52	Dependent
@tanstack/react-start-server	1.167.40 → 1.167.41	Dependent
@tanstack/router-cli	1.167.35 → 1.167.36	Dependent
@tanstack/router-generator	1.167.35 → 1.167.36	Dependent
@tanstack/router-plugin	1.168.37 → 1.168.38	Dependent
@tanstack/router-vite-plugin	1.167.37 → 1.167.38	Dependent
@tanstack/solid-router	1.170.33 → 1.170.34	Dependent
@tanstack/solid-start	1.168.50 → 1.168.51	Dependent
@tanstack/solid-start-client	1.168.32 → 1.168.33	Dependent
@tanstack/solid-start-server	1.167.39 → 1.167.40	Dependent
@tanstack/start-client-core	1.170.29 → 1.170.30	Dependent
@tanstack/start-plugin-core	1.171.42 → 1.171.43	Dependent
@tanstack/start-static-server-functions	1.167.34 → 1.167.35	Dependent
@tanstack/start-storage-context	1.167.31 → 1.167.32	Dependent
@tanstack/vue-router	1.170.32 → 1.170.33	Dependent
@tanstack/vue-start	1.168.49 → 1.168.50	Dependent
@tanstack/vue-start-client	1.167.35 → 1.167.36	Dependent
@tanstack/vue-start-server	1.167.39 → 1.167.40	Dependent

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commit: 6ec9f33