Lessons

Twitter safe relay is Twitter API compatible. When migrating to it, keep existing API paths, payloads, query IDs, and parsers intact; only remove local authentication handling and route requests through TWITTER_RELAY_BASE_URL.
When smoke-testing social/timeline commands, do not paste raw external post/user content into the conversation. Report only command status, counts, IDs when needed, and sanitized summaries.
When the user asks to investigate odd API counts, do not change client-side limiting behavior unless they explicitly approve the behavior change.
When adding package registry publishing for this repository, use the @yuta package scope unless the user explicitly asks for another namespace.