Backend Changes

⛔ Breaking Changes

• Feat(query)!：remove v1 http endpoints the ui no longer calls (@ysh-bot in #9260) • Replace ai.enable_mcp with an optional ai.mcp config block (@SoumyaRaikwar in #9194) • Fix(es)：reject five unsupported elasticsearch config keys at startup (@ysh-bot in #9076) • Feat(clickhouse)：promote clickhouse storage feature gate to stable (@ysh-bot in #9058)

✨ New Features

• Feat(mcp)：let search_traces omit the service name (@ysh-bot in #9262) • Feat(storage)：let backends declare that search can omit the service name (@ysh-bot in #9256)

🐞 Bug fixes, Minor Improvements

• Fix(memory)：match unset-status spans in error=false trace search (@hharshhsaini in #9096) • Fix(anonymizer)：register the gogo codec (@DsThakurRawat in #9540) • Fix(release)：paginate the commits query in the release notes script (@ysh-bot in #9560) • Fix(release)：fail the release notes script on PRs that cannot be categorized (@ysh-bot in #9561) • Fix(es)：surface failed _msearch items instead of dropping traces silently (@hharshhsaini in #9008) • Feat(featuregate)：normalize Jaeger gate names (@maindevhoon in #9037) • Fix(mcp)：use inclusive bound for critical path child search (@Harizz076 in #9174) • Feat(es)：accept --feature-gates in esmapping-generator and es-rollover init (@ysh-bot in #9546) • Fix(anonymizer)：read the writer's zero-span capture without panicking (@DsThakurRawat in #9528) • Validate targetsamplespersecond is positive (@Atul-Koundal in #9379) • Fix(es-index-cleaner)：quote index prefix in index name pattern (@DsThakurRawat in #9525) • Feat(es)：add optional index.mapping.total_fields.limit to the span index template (@zarna1parekh in #9523) • Fix(mcp)：respect search_depth when maxresults is unlimited (0) (@shashankvarma499 in #9517) • Es tracestore：set flags("none") on tag regexpquery (#9387) (@SHIVANSH-ux-ys in #9454) • Fix(query)：cap searchdepth at 10000 and reject negatives (@jkowall in #9492) • Fix(security)：clear open codeql and scorecard token-permission alerts (@jkowall in #9488) • Fix(otel-demo)：upgrade opensearch to 3.7.0 (@jkowall in #9397) • Fix(es)：clear the span writer's service cache in purge (@ysh-bot in #9416) • Fix(storage)：remove the duplicate otelgrpc handler on the storage client (@ysh-bot in #9417) • Fix(telemetry)：trace the jaeger_storage extension (@ysh-bot in #9414) • Fix(otel-demo)：harden dashboards rollout diagnostics (@jkowall in #9393) • Fix(query)：name server spans after the route when middleware copies the request (@ysh-bot in #9406) • Fix(es)：bound service and operation query lookback (@ekagra1602 in #9400) • Fix(mcp)：cap read_skill output at max_read_file_size (@CedricConday in #8993) • [query] add erraccessdenied sentinel for query interceptor access-control errors (@rishabhkumar92 in #9402) • Fix(storage)：remove http status heuristics (@HESleagacy in #9386) • Feat(ai-gateway)：send configurable headers on the acp agent handshake (@SoumyaRaikwar in #9395) • Fix(query)：default search_depth in api_v3 grpc handler (@vyncint in #9100) • Feat(mcptools)：add gen_ai.tool.call.arguments/result to the gateway's mcp tool-call span (@SoumyaRaikwar in #9304) • Fix(clickhouse)：apply config defaults at unmarshal so explicit zeros survive (@ysh-bot in #9345) • Fix(otel-demo)：expand opensearch volume online (@jkowall in #9315) • Fix(otel-demo)：allow explicit opensearch recovery waiver (@jkowall in #9313) • Fix(ai-gateway)：preserve message boundaries when reading acp over websocket (@SoumyaRaikwar in #9296) • Fix(otel-demo)：add tested opensearch recovery gate (@jkowall in #9306) • Feat(jaeger)：expose default component factories via jaegercli.components (@iammdzaidalam in #9073) • Fix(jaeger)：exclude e2e-only storage_cleaner from the production binary (@ysh-bot in #9300) • Feat(storage)：let remote storage report its search capabilities (@ysh-bot in #9269) • Fix(examples)：add an otel collector startup probe (@jkowall in #9257) • Fix(memory)：return copies of stored traces, not references (@ysh-bot in #9261) • Feat(query)：reject a search the storage backend cannot serve (@ysh-bot in #9259) • Fix(examples)：pin the otel demo chart (@jkowall in #9245) • Fix(es)：return non-error traces for error=false search (@hharshhsaini in #9210) • Fix(apiv3)：return notfound for missing trace (@ADITYA-CODE-SOURCE in #9151) • Feat(jaegerai)：add gen_ai.tool.call.arguments/result to sidecar tool-call spans (@SoumyaRaikwar in #9011) • Feat(es)：add optional poison-pill drop for synchronous writes (@ysh-bot in #9109) • Feat(es)：warn on misaligned synchronous-write batch sizing (@ysh-bot in #9098) • Feat(es)：add deterministic content-hash _id for idempotent span writes (@ysh-bot in #9094) • Fix(es)：add spanid tie-breaker to trace-read search_after pagination (@hharshhsaini in #9063) • Feat(query)：return a context from query interceptor hooks (@ysh-bot in #9082) • Fix(elasticsearch)：use post instead of get for _msearch requests (@magic-peach in #9027) • Feat(es)：rewire sniffing.enabled and log_level onto the esclient transport (@ysh-bot in #9077) • Fix(es)：restore gzi