13.16.0 (2026-03-22)
Features
- Add backend skill (#12117) (cc8de3b)
- add configurable package manager preference per language (#12140) (bf35656)
- add copy name/ID action menu to nav breadcrumbs (#12150) (bc3ae84)
- add copy-to-clipboard to session, span, and trace ID cells (#12237) (ad32209)
- add expectedRunCount experiment field and experiments table fraction (#12277) (d1367fb)
- add GET /v1/user endpoint and phoenix-rest-api skill (#12274) (b5188ea)
- add integration snippets to tracing onboarding page (#12109) (af36e2c)
- Add spans command to Phoenix CLI for fetching and filtering spans (#12241) (65e52c2)
- Add trace-level and annotation APIs to evals skill (#12304) (120b2a8)
- Add TypeScript onboarding snippets for LangChain, OpenAI, Anthropic, and Mastra (#12186) (6d4e8d7)
- agent context and side-bar (#12181) (daa94db)
- agent: add browser bash tool execution (#12196) (37f90ce)
- app: add core Badge component (#12300) (498a2b0)
- deprecate useNotifyError and replace error toasts with inline Alert banners (#12136) (4bb1c50)
- Figma MCP and storybook skills (#11510) (c65c6fb)
- ID icon (#12297) (e1e05f1)
- new icons for mastra, llamaindex, bedrock (#12232) (8b7a5c0)
- onboarding: add Bedrock integration and language tab icons (#12214) (a3e8365)
- onboarding: add Python integration snippets (#12197) (42a7a1b)
- onboarding: expand integration list and add search filter (#12250) (329342e)
- playground: canonical hub-and-spoke tool choice and response format (#12108) (b38a838)
- tracing onboarding UI refinements (#12177) (ff36b53)
- ui: add collapse top-level keys toggle for dataset upload (#12058) (8f7c7d5)
- ui: add Shimmer component for AI loading states (#12126) (0cb2548)
Bug Fixes
- consistent backgrop (#12298) (42e9959)
- datasets: replace fetchQuery with loadQuery in react router loaders (#12225) (8d94982)
- deps: update arize-phoenix-client to 2.0.1 (#12153) (a5fb8b1)
- deps: update arize-phoenix-client to 2.1.0 (#12207) (7ddb6e1)
- docker: use published uv 0.10.9 trixie-slim base image (#12273) (ed9acd9)
- fix link to server evals docs (#12138) (3edc9cb)
- migrate llms.txt to standard llmstxt.org format (#12189) (d320b93)
- playground: require tool parameters, normalize empty schema, show tool_choice in UI (#12185) (c625262)
Documentation
- Add Phoenix release notes for 03-11-2026 through 03-18-2026 (#12211) (dd9a840)
- cli: add changeset, README, and skill docs for
px docs fetch(#12162) (c0836c3) - promote coding agents to top-level docs nav (#12290) (45b5fb0)
- refine llms.txt: expand coverage, drop integrations, optimize conciseness (#12191) (565041c)
- rewrite CONTRIBUTING.md to set clear contribution expectations (#12184) (80ef394)