pgEdge Go LLM Library provides a unified Go interface for multiple LLM providers with streaming, tool calling, retries, and an HTTP and server-sent events proxy. From 0.1.0 until 0.2.0, GET /v1/health in llm/proxy/handlers.go uses handleHealth to ping providers with the operator's real credentials and returns their error text, while the Authorize hook in llm/proxy/proxy.go permits access by default when the consuming application does not configure it. When a provider rejects the configured credential, a remote caller who can reach the proxy can obtain part of the operator's third-party provider API key from the resulting error. This issue is fixed in version 0.2.0.

Affected: Go: github.com/pgEdge/pgedge-go-llm-lib

### Impact

An unauthenticated caller could read part of the operator's configured LLM provider API key.

The library's own health handler pings every configured provider using the operator's real credential and returns the resulting error text verbatim. Providers characteristically quote a partially masked form of the credential they rejected, so a failing ping published a fragment of the key.

**The endpoint is unauthenticated by default.** `authorize()` returns true immediately when the consuming application sets no `Authorize` hook, so `GET /v1/health` is reachable by anyone who can reach the listening port unless the consumer opted in to authentication.

**Who is affected:** any application embedding pgedge-go-llm-lib at `0.1.0` or `0.1.1` that exposes the bundled HTTP proxy without setting an `Authorize` hook. Both affected versions are released tags and resolve through the public Go module proxy.

The disclosed material authenticates to a **third-party provider account** rather than to pgEdge software, which is why the severity carries Scope: Changed.

Evidence at `v0.1.1`: `llm/proxy/handlers.go:296` (`handleHealth` returning `err.Error()` in `ProviderHealth.Error`), `llm/proxy/proxy.go:247` (`authorize()` defaulting to permit), and `llm/proxy/proxy.go:350` (`writeError` writing the error with no redaction).

### Patches

**Fixed in `0.2.0`. Upgrade to `0.2.0` or later**, which redacts credentials from provider error messages unconditionally. The fix adds `llm/intern…