# @pleach/transport-vertex changelog (/docs/changelog/transport-vertex)



This page collects the **site-content changelog entries** that
materially touched the [`@pleach/transport-vertex`](/docs/transport-vertex)
docs surface or named a `@pleach/transport-vertex` symbol. It is not the
runtime changelog — the canonical record of the transport's runtime
behavior lives in the upstream package `CHANGELOG.md`. The package
is not on npm yet.

See the combined site changelog at
[`/docs/changelog/combined`](/docs/changelog/combined) for the
chronological unified view across every SKU.

## Unreleased [#unreleased]

### Changed [#changed]

* **[`/docs/transport-vertex`](/docs/transport-vertex) documents the
  shipped credential surface.** Application Default Credentials,
  including workload identity, apply when `credentials` is omitted,
  and the page now warns multi-tenant hosts that this means ambient
  ADC. `location` must match `/^[a-z0-9-]+$/`. Credential failures and
  HTTP 401/403 surface only as `"vertex: authentication failed"`, with
  the underlying error passed to `onAuthError`. `google-auth-library`
  is an optional peer. v1 covers Gemini only; the page no longer lists
  Anthropic-on-Vertex or "Vertex-specific cost-event emission".