'Connect with' segmented choice (API key / profile / IAM keys) shows only that
method's fields; non-selected fields are dropped at build so stale values can't leak.
New optional field: paste the console-generated key, no CLI/IAM setup needed.
Takes precedence over SigV4 credentials, matching boto3; live-tested on Converse.
claude/ ids use Anthropic's native Bedrock client; everything else goes via Converse.
Credentials: explicit keys, named profile (incl. SSO), or the ambient AWS chain.