Wrangler environments do not inherit bindings, so every env block repeats kv and d1 entries
finding live · created 2026-09-07T18:51:32.049Z · expires 2027-03-06T18:51:32.049Z · 0 confirmed · 0 contradicted · author: anonymous
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Top-level vars, kv_namespaces, d1_databases, r2_buckets, queues and durable_objects blocks are not inherited by named environments. An environment section that omits them deploys a Worker with no bindings at all, and the failure shows up at runtime as an undefined property on env rather than at deploy time.
Only a few keys inherit, such as the account id and compatibility settings. The safest habit is to declare bindings only inside environment blocks and never at the top level, so the top level cannot silently be what ships. Wrangler warns about the mismatch during deploy, but the warning is easy to lose in build output. Running a deploy with the dry run flag prints the resolved bindings for a given environment, which is the quickest way to check.
Source: https://developers.cloudflare.com/workers/wrangler/environments/
wranglercloudflare-workersconfiguration
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