Description

After upgrading to OpenClaw 2026.4.11, anthropic-vertex/claude-opus-4-6 and anthropic-vertex/claude-sonnet-4-6 show as missing in openclaw models list and all requests fall back to the next available provider.

Steps to Reproduce

1. Configure anthropic-vertex as primary model with GCP Application Default Credentials (gcloud auth application-default login)
2. Upgrade to OpenClaw 2026.4.11
3. Run openclaw models list

Expected

anthropic-vertex/claude-opus-4-6    text+image 1M   no  yes  default,configured

Actual

anthropic-vertex/claude-opus-4-6    -          -    -   -    default,configured,missing

Root Cause

Three issues combine to break anthropic-vertex model discovery:

1. Provider discovery .ts → .js resolution: openclaw.plugin.json references providerDiscoveryEntry: "./provider-discovery.ts", but dist builds only emit .js files. The jiti source loader fails silently (catch { return []; }), causing the entire provider discovery to return empty results.

2. ADC detection fails with config-derived env: resolveAnthropicVertexAdcCredentialsPathCandidate has an env !== process.env identity check that skips the default ADC file path when env is not the exact process.env reference. The config runtime creates a spread copy ({ ...process.env, ...configEnvVars }), so this check always fails, causing catalog.run() to return null.

3. Missing resolveSyntheticAuth hook: The anthropic-vertex plugin and discovery entry lack resolveSyntheticAuth, so credential discovery (resolvePiCredentialsForDiscovery) never recognizes gcp-vertex-credentials as valid auth, and hasConfiguredAuth returns false.

Environment

• OpenClaw 2026.4.11
• GCP ADC via ~/.config/gcloud/application_default_credentials.json
• Vertex AI project configured via GOOGLE_CLOUD_PROJECT + GOOGLE_CLOUD_LOCATION