[workers-utils] Use the inherited Worker name for containers in named environments

[LeSingh1]

normalizeAndValidateEnvironment passes rawEnv.name to validateContainerApp, but name is inheritable. A named environment that doesn't redeclare it still runs under the top level Worker name, so the container name gets built from undefined:

{
  "name": "test-worker-name",
  "env": {
    "staging": {
      "containers": [{ "image": "./Dockerfile", "class_name": "test-class" }]
    }
  }
}

On main this produces "name": "undefined-test-class-staging" and then fails validation outright:

Processing wrangler configuration:
  - "env.staging" environment configuration
    - Must have either a top level "name" and "containers.class_name" field defined, or have field "containers.name" defined.

Config errors are fatal (packages/wrangler/src/config/index.ts throws UserError), so this blocks wrangler deploy --env <name> entirely for any Worker declaring containers under a named environment without repeating name.

Falling back to the top level name yields "test-worker-name-test-class-staging" and validation passes. Nothing that previously succeeded changes behavior — this only unblocks a case that could not get past validation at all.

---

• Tests
  • Tests included/updated
• Public documentation
  • Documentation not necessary because: this restores the documented inheritance behavior for name; no user-facing config surface changes.

Note

This is a contribution from an AI agent: Claude Code (Claude Opus 4.5), working on behalf of @LeSingh1. Review comments will be read and responded to.

---

[changeset-bot]

🦋 Changeset detected

Latest commit: f34eb92

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
@cloudflare/workers-utils	Patch
@cloudflare/autoconfig	Patch
@cloudflare/cli-shared-helpers	Patch
@cloudflare/deploy-helpers	Patch
@cloudflare/remote-bindings	Patch
@cloudflare/workers-auth	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• .changeset/container-name-named-env.md: [@cloudflare/wrangler]
• packages/workers-utils/src/config/validation.ts: [@cloudflare/wrangler]
• packages/workers-utils/tests/config/validation/normalize-and-validate-config.test.ts: [@cloudflare/wrangler]

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 1 additional finding.

[pkg-pr-new]

@cloudflare/autoconfig

npm i https://pkg.pr.new/@cloudflare/autoconfig@15009

@cloudflare/build-output-utils

npm i https://pkg.pr.new/@cloudflare/build-output-utils@15009

@cloudflare/config

npm i https://pkg.pr.new/@cloudflare/config@15009

create-cloudflare

npm i https://pkg.pr.new/create-cloudflare@15009

@cloudflare/deploy-helpers

npm i https://pkg.pr.new/@cloudflare/deploy-helpers@15009

@cloudflare/kv-asset-handler

npm i https://pkg.pr.new/@cloudflare/kv-asset-handler@15009

miniflare

npm i https://pkg.pr.new/miniflare@15009

@cloudflare/pages-functions

npm i https://pkg.pr.new/@cloudflare/pages-functions@15009

@cloudflare/pages-shared

npm i https://pkg.pr.new/@cloudflare/pages-shared@15009

@cloudflare/unenv-preset

npm i https://pkg.pr.new/@cloudflare/unenv-preset@15009

@cloudflare/vite-plugin

npm i https://pkg.pr.new/@cloudflare/vite-plugin@15009

@cloudflare/vitest-pool-workers

npm i https://pkg.pr.new/@cloudflare/vitest-pool-workers@15009

@cloudflare/workers-auth

npm i https://pkg.pr.new/@cloudflare/workers-auth@15009

@cloudflare/workers-editor-shared

npm i https://pkg.pr.new/@cloudflare/workers-editor-shared@15009

@cloudflare/workers-utils

npm i https://pkg.pr.new/@cloudflare/workers-utils@15009

wrangler

npm i https://pkg.pr.new/wrangler@15009

commit: f34eb92