For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
New
- OpenAI SDK TypeScript integration — auto-instrument OpenAI calls with
@respan/instrumentation-openai. Includes streaming, tool calls, multi-turn, structured output, and batch API examples.
- is_cached_by_model — new cache option to invalidate caches when switching models. Set
cache_options.is_cached_by_model: true.
- Span pinning — pin spans for infinite retention with
is_pinned: true. PATCH existing spans to pin them.
Improved
- Customer identifier now has 254 character limit with auto-truncation
- Properties field added for typed metadata (preserves native types unlike metadata)
