* feat: add anthropic-vertex provider for Claude models on Google Vertex AI
Add a new anthropic-vertex provider that enables using Claude models
(Opus 4.6, Sonnet 4.6, Haiku 4.5) through Google Vertex AI using the
@anthropic-ai/vertex-sdk package. Follows the same pattern as the
existing google/google-vertex provider split.
Detection uses ANTHROPIC_VERTEX_PROJECT_ID (same env var as Claude Code)
with CLOUD_ML_REGION for region selection, falling back to us-central1.
Extracts shared Anthropic utilities into anthropic-shared.ts (message
conversion, tool conversion, param building, stream processing) to
avoid duplication between anthropic.ts and anthropic-vertex.ts.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* feat: add full Claude model set for anthropic-vertex provider
Add 200K context window variants for Opus 4.6 and Sonnet 4.6, plus
older models (Sonnet 4.5, Sonnet 4, Opus 4.5, Opus 4.1, Opus 4, Haiku 4.5).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: add @anthropic-ai/vertex-sdk to root dependencies
Required for the published package to resolve the vertex SDK at runtime.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: remove unnecessary comments to match codebase style
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: remove duplicate stream functions after rebase
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Nathan Roe <nathan.roe@carvana.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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