Under the hood Bindings

How Devflare wires Vectorize from config to runtime

Vectorize compiles cleanly into Wrangler output and participates in preview resource lifecycle, but the runtime value of the binding mostly lives in remote infrastructure.

That is why the codebase treats Vectorize as supported but remote-oriented. Config and preview handling are strong; local emulation is intentionally not oversold.

Normalization: The authored shape is small, so most complexity is in remote access and preview resource lifecycle
Compile target: Wrangler
Preview note: Preview-scoped Vectorize indexes are lifecycle-managed resources in Devflare

Devflare normalizes the authored shape before it does anything louder

Each Vectorize binding is a named env entry pointing to an explicit . There is not much normalization complexity because the important value is already visible in source.

The heavier internal story is around preview resource handling and remote test support, because that is where real index existence and lifecycle start to matter.

Vectorize from authored config to generated output

Keep the binding readable in source, then inspect only the Wrangler-facing slice Devflare emits when the config is compiled.

import { defineConfig } from 'devflare/config'

export default defineConfig({

name: 'search-worker',

bindings: {

vectorize: {

DOCUMENT_INDEX: {

indexName: 'document-index'

}

})

Local runtime support depends on what Devflare can model directly

can supply a remote Vectorize binding when remote mode is enabled.
The codebase uses to make missing remote prerequisites explicit in tests.
The exhaustive smoke app also uses mocks for some integration checks, which is fine as long as the docs do not confuse that with first-class local emulation.

Compile, preview, and cleanup behavior

Compile emits into generated Wrangler-facing config.
Preview resource lifecycle code can materialize branch-specific index names and later clean them up.
Because the binding is remote-oriented, the hardest failures are usually missing indexes, dimension mismatches, or auth — not config syntax.

Supported does not mean locally emulated

Vectorize is fully part of the config schema and preview story, but the meaningful runtime path still belongs to the remote platform.

Vectorize

Vectorize is fully modeled in Devflare config and preview naming, but meaningful tests are still remote-oriented because the index lives on Cloudflare infrastructure.

Testing Vectorize

The right Vectorize tests are targeted remote checks: a small insert or query, a clear skip condition, and a real index behind the binding.