- anthropicModelManagerOptions accepted the registry-derived base URL verbatim; bundled rows without the /v1 suffix made discovery request https://api.anthropic.com/models (404), so a stale text-only cache row stayed authoritative over fresh models.dev vision metadata and snapcompact refused to run on claude-opus-5.
- Discovery now always targets /v1/models via toAnthropicDiscoveryBaseUrl while model rows keep the provider base URL, mirroring createSimpleAnthropicProviderOptions.
- Added issue repro test covering the bare-host base URL shape.
Fixes#6563
can1357
e0c9ce046c