Strip whitespace (blank → None) and reject non-ASCII-token characters to prevent impossible header lookups that would fail all signed requests. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Strip whitespace (blank → None) and reject non-ASCII-token characters to prevent impossible header lookups that would fail all signed requests. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>