Implements paginated Google Drive/Gmail retrieval with a tenacity-based retry decorator that specifically handles transient connection failures (BrokenPipe, ConnectionReset, SSL EOF, timeout) and re-raises after exhaustion. The retry strategy is generic enough to be extracted for any unreliable external API and the pagination logic is isolated and testable.

Provides a reusable rate-limit wrapper for external API calls across connectors. This solves a recurring problem in data ingestion—avoiding 429s and respecting third-party API quotas—without coupling to any specific connector implementation.

Self-contained PKCE code verifier and challenge generator for OAuth flows. It has no framework-specific dependencies and can be dropped into any OAuth client or authorization server implementation needing RFC 7636 support.

Analyzes spreadsheet-like sections to drive intelligent chunking decisions, preserving row/column context when splitting tabular content for RAG ingestion. This addresses a common document-preprocessing problem and the analysis logic is adaptable to different tabular data sources beyond Onyx's connectors.

A tenacity-based retry wrapper around vector document index operations that adds exponential backoff and transient-failure tolerance without blocking callers. It demonstrates a clean defensive-integration pattern for external search engines and can be reused for any flaky remote index client.