feat(util-genai): streaming Event Log → Trace conversion (TurnStreamSession)#58
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feat(util-genai): streaming Event Log → Trace conversion (TurnStreamSession)#58fangxiu-wf wants to merge 1 commit into
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…ession) Add createTurnStreamSession/TurnStreamSession for incremental per-turn conversion: ENTRY/AGENT are opened on first push and kept open, each complete step converts and exports (then frees) its child spans as it finalizes, and ENTRY/AGENT close on end() with turn-level aggregates. Memory decouples from the number of steps in a turn (bounds the OOM risk on very long turns with thousands of ReAct steps). - graceSteps (default 2) look-back window tolerates bounded out-of-order emission; lateDroppedRecordCount + LATE_STEP_DROP warning make overflow observable; pendingRecordCount probe exposes buffered retention. - SPEC §2.5 documents the step-ordering expectation for streaming consumers (batch conversion remains order-independent). - Extract shared accumulateResponseUsage/usageFieldsFromAcc so batch buildInvokeAgentInvocation and the streaming session share one token aggregation; export parseInputMessages/parseOutputMessages. - Batch convertEventLogToTrace/convertTurn unchanged; streaming is an independent API validated by per-span equivalence tests. - bump 0.1.0-beta.11 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
createTurnStreamSession/TurnStreamSession: incremental per-turn conversion where ENTRY/AGENT stay open and each complete step converts + exports (then frees) its child spans as it finalizes, closed atend()with turn-level aggregates. Memory decouples from the number of steps in a turn, bounding the OOM risk on very long turns (thousands of ReAct steps).graceSteps(default 2) look-back window tolerates bounded out-of-order emission;lateDroppedRecordCount+LATE_STEP_DROPwarning make overflow observable;pendingRecordCountprobe exposes buffered retention.accumulateResponseUsage/usageFieldsFromAccso batchbuildInvokeAgentInvocationand the streaming session use one token aggregation; exportparseInputMessages/parseOutputMessages.convertEventLogToTrace/convertTurnunchanged — streaming is an independent API.0.1.0-beta.11.Test plan
npm run buildpassesnpm testgreen — 222 tests (221 passed + 1 skipped; the skipped heap test runs underNODE_OPTIONS=--expose-gc)turn-stream.test.ts: incremental export, subagent nesting across fragmented pushes, grace-window tolerance of distance-1 cross-batch interleaving, late-drop counting/warning, parent_span_id linkage, trace_id resolution, strict mode, and per-span equivalence vsconvertEventLogToTrace(structure / AGENT tokens / LLM input.messages / startTime / warnings)turn-stream.memory.test.ts:pendingRecordCountbounded and independent of turn size (N=1000 vs 5000); heap bounded under production config (BatchSpanProcessor + async)🤖 Generated with Claude Code