# AN-2026-0655: Wrangler 4.156.0 (Oct 29, 2026): zero-config deploy in CI/agents now fails with "looks like a Cloudflare Pages project using Pages Functions" when a functions/ dir sits next to root static files

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- id: AN-2026-0655 (version 1; cite https://breakwire.org/claim/AN-2026-0655/v/1)
- kind: breaking · status: active · review: editor
- source: <https://github.com/cloudflare/workers-sdk/releases/tag/wrangler%404.156.0#:~:text=Stop%20autoconfig%20in%20non-interactive%20runs>
- more sources: <https://github.com/cloudflare/workers-sdk/commit/ec0bea48d6316c8ca893241efbf31f1ffcfa6134> <https://github.com/cloudflare/workers-sdk/commit/b4653b40cdc6e176c4e5ac98696cf0dae641ff6b>
- event date: 2026-10-29
- services: cloudflare-wrangler, cloudflare-workers, cloudflare-pages
- affected: npm:wrangler >=4.156.0
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. The wrangler@4.156.0 release notes (opened 2026-10-29) say: when a project without a detected framework has a functions directory, autoconfig asks whether it is a Cloudflare Pages project; non-interactive runs (CI and coding agents) assumed it was not and deployed the project root as static assets, so the Pages Functions (the API routes) were not deployed.  [✓0 ✗0]
1. From 4.156.0, in that case autoconfig stops with an error saying Pages Functions cannot be migrated automatically yet. The error text in the commit (ec0bea4) begins: "This project has a `functions` directory and static files in its root, which looks like a Cloudflare Pages project using Pages Functions. Automatic configuration cannot migrate Pages Functions to Workers yet, and deploying the project root as static assets would leave the Functions undeployed."  [✓0 ✗0]
2. Unaffected per the release notes: projects whose static files are already in a subdirectory, projects detected as Pages or with a detected framework, and interactive runs where the user answers the prompt.  [✓0 ✗0]
3. Before 4.156.0 the same non-interactive deploy succeeded silently without the Functions, so an API route that worked on Pages could return 404 after a zero-config wrangler deploy.  [✓0 ✗0]
4. Also in 4.156.0 (commit b4653b4): when an assets-only project's root contains a Pages functions directory or _worker.js, autoconfig warns that it will not be deployed, with text containing "in the project root will not be deployed: the project is configured as static assets", because it is excluded via .assetsignore and not run as server code.  [✓0 ✗0]

## Fix
```text
If functions/ holds Pages Functions: move the static files into a subdirectory (e.g. public/) and deploy with `wrangler pages deploy public --project-name <name>`, or migrate the Functions to a Worker (developers.cloudflare.com/workers/static-assets/migration-guides/migrate-from-pages/). If functions/ is not Pages Functions: move the static files into a subdirectory or add a Wrangler configuration file so autoconfig is skipped.
```

## Error signatures
- substring: `looks like a Cloudflare Pages project using Pages Functions` (verbatim from AutoConfigDetectionError in cloudflare/workers-sdk commit ec0bea4 (wrangler 4.156.0) and its inline test snapshot)
- substring: `Automatic configuration cannot migrate Pages Functions to Workers yet` (verbatim from the same error (commit ec0bea4))
- substring: `in the project root will not be deployed: the project is configured as static assets` (verbatim from the logger.warn added in cloudflare/workers-sdk commit b4653b4 (wrangler 4.156.0): root functions/ or _worker.js excluded from an assets-only deploy)

## Outcome reports (0)
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## History
- v1 2026-10-29 by wire-editor: promoted from candidate #92 (wrangler-releases) after review