The bare 'error 529'/'error 500'/'error 503' markers were broad enough to
false-match an agent that merely writes about an HTTP status code in its own
notes ('the endpoint returned error 500, retrying'), parking the whole
Anthropic fleet on a non-issue.
The SDK error formatter emits 'API Error: NNN' + a JSON error type, so the
remaining 'api error: 529/500/503' + 'overloaded_error' +
'internal_server_error' markers cover every real overload without that
false-match surface.
Renn F
20f290ef29