v2026.11.0-alpha

Upgrade notes

• Batch format 5 is required. This release does not read format 4 telemetry. Before upgrading, stop Fanout and move the telemetry/ and query/ directories out of the data directory. Keep control/: users, dashboards, alert rules and the ingest token carry over.
• Renamed API and MCP contracts (#416), with no aliases. MCP tools are get_overview and get_insights. Routes are GET /api/insights and POST /api/annotations/query. User, alert and rule lists return named arrays (users, alerts, rules). Update MCP clients and scripts.
• Saturated ingest throttles instead of blocking. Exporters receive gRPC RESOURCE_EXHAUSTED with RetryInfo, or HTTP 429 with Retry-After. The OpenTelemetry Collector retries these by default.
• Panel results are cached for up to FANOUT_QUERY_CACHE_TTL (default 10s). Manual refresh bypasses the cache. Summary-backed panels lag about one minute, and quantiles are approximate to within one histogram bucket.
• New: the Explore page with FanQL, and dashboard and alert editing without chat.

Benchmarks against v2026.10.8-alpha are in #417.

What's Changed

• feat(fanql): FanQL text query language with HTTP, MCP and AI-optional UI by @vishr in #410
• refactor!: name the structured query after queries and use last_evaluated_at by @vishr in #411
• docs: keep design proposals and decision records under standard names by @vishr in #412
• feat: Explore, FanQL and batch format 5 by @vishr in #417

Full Changelog: v2026.10.24-alpha...v2026.11.0-alpha