#wrangler

Wrangler Removes Service Environments (v4.111.0)

Wrangler 4.111 removes service environments and legacy_env. Each environment now deploys as its own Worker, and here is the exact error and how to migrate.

Aug 6, 2026Read more →

A terminal window showing the verbatim changelog entry: Remove containerEngine from the worker options returned by unstable_getMiniflareWorkerOptions

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Wrangler 4.117 Drops containerEngine From Miniflare

Wrangler 4.117 removes containerEngine from unstable_getMiniflareWorkerOptions. Custom local-testing harnesses reading it now get undefined, silently.

Aug 6, 2026Read more →

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Check Worker Bundle Size With wrangler check startup

wrangler check startup graduated from alpha in v4.116 and now shows real bundle size and a startup CPU profile. Run on this site: 3.95 KiB, gzip 1.54 KiB.

Aug 6, 2026Read more →

A terminal window showing the verbatim changelog entry for wrangler 4.113.0: Add a settings export to the experimental cloudflare.config.ts config

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Wrangler's New cloudflare.config.ts settings Export

Wrangler 4.113 adds a defineSettings export to the experimental cloudflare.config.ts format, moving accountId and complianceRegion out of the Worker config.

Aug 6, 2026Read more →

A terminal window showing the verbatim changelog entries for local dev observability: added in wrangler 4.114.0, enabled by default in wrangler 4.118.0

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Wrangler Now Traces Local Dev by Default (v4.118)

Wrangler 4.118 captures request traces and console logs into Local Explorer by default. Opt out with X_LOCAL_OBSERVABILITY=false if it causes trouble.

Aug 6, 2026Read more →

A real terminal capture of wrangler login --help, showing the actual --device flag description for the OAuth 2.0 Device Authorization Grant

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Wrangler Login Now Supports OAuth Device Grant

wrangler login --device (RFC 8628) skips the localhost callback for headless terminals. Confirmed live against wrangler 4.119.0, from this remote sandbox.

Aug 6, 2026Read more →

A terminal window showing the verbatim changelog entry for wrangler 4.115.0: Add experimental local_dev.experimental_s3_credentials to r2_buckets config

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New r2_buckets Local Dev Credentials in Wrangler

Wrangler 4.115 adds local_dev.experimental_s3_credentials to r2_buckets bindings, scoping real S3-compatible credentials to local dev instead of faking R2.

Aug 6, 2026Read more →

A terminal window showing the verbatim changelog entry for wrangler 4.116.0: Avoid Worker and workers.dev naming prompts in agent-driven deploys

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Wrangler Skips Naming Prompts in Agent/CI Deploys

Wrangler 4.116 detects non-interactive terminals and skips the first-deploy naming prompt automatically, fixing CI pipelines and AI agents driving the CLI.

Aug 6, 2026Read more →

A terminal window showing a real test: wrangler.jsonc silently wins over wrangler.toml, with no warning printed about the ignored file

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Fix Wrangler wrangler.toml vs jsonc Precedence

When both wrangler.toml and wrangler.jsonc exist, Wrangler silently uses jsonc with no warning. Confirmed by test, plus the fix for teams mid-migration.

Aug 6, 2026Read more →

A terminal window showing the verbatim changelog entry for wrangler 4.115.0: Support connect() on remote VPC Network and VPC Service bindings in local development

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VPC Bindings Now Connect in Wrangler Local Dev

Wrangler 4.115 lets connect() work on remote VPC Network and VPC Service bindings during local dev, closing a real gap that used to force stubs.

Aug 6, 2026Read more →

A dark comparison-matrix style cover listing Wrangler's July 2026 breaking changes: service environments removed, wrangler.toml vs jsonc precedence, containerEngine dropped from Miniflare, cloudflare.config.ts settings export, and local dev observability default-on

Dev Tools

Wrangler's July 2026 Breaking Changes: Full Guide

Wrangler shipped 10 changes across v4.111-4.119 in July 2026. One real breaking change, plus nine config, local-dev, and CLI shifts. Full rundown and fixes.

Aug 6, 2026Read more →