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Added _AUTH_ERROR_PATTERNS and _is_auth_error() helper alongside the existing
limit-error detection. In CliBackend.invoke(), auth errors are now detected
after the usage-limit check and raise a clear RuntimeError("Claude CLI
authentication failed") before the output reaches parse_response(). In
CliBackend.is_available(), expanded the auth check to cover "failed to
authenticate" in addition to "not logged in".
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Closes #64
Added
_AUTH_ERROR_PATTERNSlist and_is_auth_error()helper inclaude.py. InCliBackend.invoke(), auth errors ("failed to authenticate", "not logged in", "authentication_error", "invalid authentication credentials") are now detected after the usage-limit check and raise a clearRuntimeError("Claude CLI authentication failed")before the output reachesparse_response(). InCliBackend.is_available(), expanded the auth check from only"not logged in"to use_is_auth_error(), which also catches"Failed to authenticate"patterns from newer CLI versions. Added 3 new tests covering these cases.