Wrangler

# Wrangler CLI

Use the project's Wrangler version and retrieve the relevant documentation before writing commands or configuration. CLI flags and configuration fields change; do not rely on memorized examples.

## Inspect the Project

- Find the package manager, installed Wrangler version, package scripts, framework, and Wrangler config. Run commands through the project's scripts or package manager so they use its local version. Install dependencies using the existing lockfile when needed; do not silently upgrade Wrangler to match current docs. If Wrangler is not a dependency, follow the [installation guide](https://developers.cloudflare.com/workers/wrangler/install-and-update/) to add it locally. - Identify the config used by the build or deploy command, including framework-generated config. Edit its source rather than generated output. - Establish the target account, Worker, environment, and resource before running commands that change them. For data operations, determine whether the target is local or remote.

## Retrieve What the Task Needs

Use the Cloudflare MCP `docs` tool if available, or fetch the relevant linked page directly. Follow links to the specific command or product involved; avoid loading the entire reference. If a page moves, rediscover it through the [Wrangler command index](https://developers.cloudflare.com/workers/wrangler/commands/) or Cloudflare docs search.

| Task | Source | | --- | --- | | Discover commands and flags, including resource management, deployments, rollback, and diagnostics | Project-local `wrangler --help` and `wrangler <command> --help`; [command reference](https://developers.cloudflare.com/workers/wrangler/commands/) | | Edit config or add a binding | Installed `wrangler/config-schema.json` (usually under `node_modules`); [configuration reference](https://developers.cloudflare.com/workers/wrangler/configuration/) | | Deploy a framework application | [Framework guides](https://developers.cloudflare.com/workers/framework-guides/); follow the guide for the project's existing framework and adapter | | Migrate an application to Workers when requested | [Pages to Workers](https://developers.cloudflare.com/workers/static-assets/migration-guides/migrate-from-pages/); [Vercel to Workers](https://developers.cloudflare.com/workers/static-assets/migration-guides/vercel-to-workers/) | | Configure staging or production | [Environments](https://developers.cloudflare.com/workers/wrangler/environments/) | | Set secrets locally, in CI, or on a deployed Worker | [Secrets](https://developers.cloudflare.com/workers/configuration/secrets/) | | Generate binding and runtime types | [TypeScript](https://developers.cloudflare.com/workers/languages/typescript/) | | Run locally or choose a testing approach | [Local development](https://developers.cloudflare.com/workers/local-development/); [testing](https://developers.cloudflare.com/workers/testing/) | | Choose roles, scopes, or API token permissions for Wrangler | [Roles and permissions](https://developers.cloudflare.com/workers/authorization/); [Workers roles and permissions](https://developers.cloudflare.com/workers/authorization/workers/#wrangler) | | Create or manage a branch or pull request environment | [Previews overview](https://developers.cloudflare.com/workers/previews/); [get started](https://developers.cloudflare.com/workers/previews/get-started/); [configuration](https://developers.cloudflare.com/workers/previews/configuration/) | | Decide whether Preview resources are isolated or shared | [Resources and isolation](https://developers.cloudflare.com/workers/previews/resources/), including its current limitations | | Configure Preview URLs, access, debugging, or CI | [Custom domains](https://developers.cloudflare.com/workers/previews/custom-domains/); [test and debug](https://developers.cloudflare.com/workers/previews/test-and-debug/); [examples](https://developers.cloudflare.com/workers/previews/examples/) | | Choose between Previews, Version URLs, and Wrangler environments | [Compare workflows](https://developers.cloudflare.com/workers/previews/compare-workflows/) | | Diagnose authentication or select an account | [General commands](https://developers.cloudflare.com/workers/wrangler/commands/general/), including `whoami`; [authentication profiles](https://developers.cloudflare.com/workers/wrangler/profiles/) | | Deploy an unauthenticated prototype | [Claim deployments](https://developers.cloudflare.com/workers/platform/claim-deployments/) for eligibility, expiry, and claim URL handling; use a permanent account for production or CI |

Use installed help and schema to check whether documented features exist in the project's version. If a required feature needs an upgrade, make that dependency explicit. If retrieval is unavailable, state the gap and use available local evidence rather than inventing syntax.

## Apply the Change

- Prefer `wrangler.jsonc` for new config. Set a new project's [compatibility date](https://developers