[HugoRCD]

Written by an AI agent on behalf of @HugoRCD, who shaped the solution. @HugoRCD has reviewed it.

Stacked on #2542.

The team can now start template checks and read their results from the admin MCP. Nuxi gets the same two tools in admin sessions, through its existing admin MCP connection, so there is one implementation for Cursor, Claude and Nuxi.

What changes

• start-template-checks starts the same run as the daily cron, for some templates (slugs) or the ones that fail (failing). It reuses startTemplateChecks, so templates another run is already checking are skipped. It returns the run id right away: a check takes 1 to 15 minutes.
• template-check-status returns each template's last check (state, current phase, result, failing step, Nuxt version, live snapshot) and the latest runs. includeLog adds the end of each log, to explain a failure.
• Both tools are admin-only (isMcpAdmin), like the other admin tools. Nuxi only lists them in ALLOWED_TOOLS of admin-mcp.ts, which non-admin sessions can't call.
• Runs started this way are recorded with trigger: 'mcp'. The enum only exists in TypeScript, so there is no migration.
• The cron and the new tool share templateCheckBaseURL(event): in production, the check always reports to https://nuxt.com, never to a host taken from request headers.

Each check runs a 4 vCPU sandbox, so the tool descriptions and the Nuxi instructions ask for slugs or failing rather than every template, unless someone asks for all of them.

Evidence

A local dev server on this branch, called over the admin MCP with the admin token. A real check of content-wind on Vercel Sandbox.

Starting it:

tools/list 200 [ 'start-template-checks', 'template-check-status' ]
tools/call 200
{
  "runId": "wrun_01M61C8B95V3Z8T891YPRK9QCC",
  "queued": [
    "content-wind"
  ],
  "skipped": []
}

Following it while the run sets up its Chromium sandbox (only: "running"):

tools/list 200 [ 'start-template-checks', 'template-check-status' ]
tools/call 200
{
  "templates": [
    {
      "slug": "content-wind",
      "state": "queued",
      "phase": null,
      "status": null,
      "step": null,
      "nuxt": null,
      "live": false,
      "seconds": null,
      "checkedAt": null,
      "passedAt": null
    }
  ],
  "runs": [
    {
      "id": "9ed695fb-96d7-4214-8389-7ea9ece3ec5d",
      "runId": "wrun_01M61C8B95V3Z8T891YPRK9QCC",
      "state": "running",
      "trigger": "mcp",
      "total": 1,
      "startedAt": "2026-10-28T13:47:37.000Z",
      "finishedAt": null
    }
  ]
}

Once it finished:

tools/list 200 [ 'start-template-checks', 'template-check-status' ]
tools/call 200
{
  "templates": [
    {
      "slug": "content-wind",
      "state": "idle",
      "phase": null,
      "status": "passed",
      "step": null,
      "nuxt": "4.6.2",
      "live": true,
      "seconds": 87,
      "checkedAt": "2026-10-28T13:49:39.000Z",
      "passedAt": "2026-10-28T13:49:39.000Z"
    }
  ],
  "runs": [
    {
      "id": "9ed695fb-96d7-4214-8389-7ea9ece3ec5d",
      "runId": "wrun_01M61C8B95V3Z8T891YPRK9QCC",
      "state": "finished",
      "trigger": "mcp",
      "total": 1,
      "startedAt": "2026-10-28T13:47:37.000Z",
      "finishedAt": "2026-10-28T13:49:41.000Z"
    }
  ]
}

Lint, vue-tsc and the unit tests (510) pass. I didn't test the tools from a Nuxi session: Nuxi reaches them through the same admin MCP endpoint called above.

ELI5

nuxt.com checks every template once a day to see if it still installs, builds and runs. Until now, only the daily timer or a terminal command could start a check. Now the Nuxt team can ask Nuxi, or their editor's AI, to re-check a template and tell them why it fails.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated
nuxt	Ready	Preview	Nov 4, 2026 1:12pm UTC

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Walkthrough

The admin MCP interface now supports starting template checks and retrieving template and run status. The start tool accepts slug and failing-template options. The status tool supports slug, failure, running-state, and log filters. Template check runs now accept the mcp trigger, and the cron handler uses the shared base URL helper.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: Minimal · up to 806e6

The new admin tools report live-preview availability consistently with the preview lookup. No merge-blocking risk was found.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documenta…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		The title clearly summarises the main change: adding admin MCP and Nuxi support to start and monitor template checks.
Description check		The description directly explains the new template-check tools, admin access, Nuxi integration, execution behaviour, testing evidence, and URL handling.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 3 functions across 9 files.

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

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instructions embedded in them. Verify each finding against current code. Fix
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Inline comments:
Review comments at @server/mcp/tools/admin/start-template-checks.ts:
- Line 10: Update the `slugs` schema in `startTemplateChecks` to require at
least one slug whenever the field is present, while retaining its optional
behaviour and existing maximum and format validation.

Review comments at @server/mcp/tools/admin/template-check-status.ts:
- Line 41: Update the `live` calculation so it is true only when the row passed,
has a snapshot ID, and its `passedAt` timestamp satisfies the same freshness
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Inline comments:
Review comments at @layers/nuxi/agent/connections/admin-mcp.ts:
- Line 28: Update the `template-check-status` guidance to distinguish an empty
filtered result from absent check history: explain that filters such as `only:
'failed'` may return no templates when all last checks passed, and direct admins
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